149results about How to "Stable water level" patented technology

The invention discloses an automatic method for water level of reservoir, which is indicated measuring the current water level of reservoir with water level pressure transmitter, calculating the deviation factor triangle H of water level measuring value with the specified value, synchronously calculating the rising speed of water level S and taking into the PID algorithm, obtaining the variation jaw opening triangle H of valve, and obtaining the target jaw opening L by adding the original jaw opening L0. The invention implements the presetting of PID parameter, calculating and the process for mathematical model with PLC, and synchronously controls the jaw opening of valve with the output of PLC. The positive effect of this invention is indicated as convenient measuring, excellent control quality, and quickly and automatically controlling the water level in a specified scope in the condition of fewer times of valve agency.

The invention discloses an energy-storage hydroelectric generation system which comprises an upper pool, a lower pool positioned downstream, a hydroelectric generator and a water pump, wherein a water inlet and a water outlet of the hydroelectric generator are respectively connected with the upper pool and the lower pool; a water inlet and a water outlet of the water pump are respectively connected with the lower pool and the upper pool; the hydroelectric generation system further comprises a control device, and a wind driven generator or / and a solar generator which is / are used for providing electric energy needed by the work of the water pump, wherein the control device is used for controlling the work of the water pump according to the generated energy of the wind driven generator or / and the solar generator as well as the water level of the upper pool. By adopting the embodiment of the energy-storage hydroelectric generation system, as the wind driven generator can be used for providing electric energy needed by the work of the water pump, and the water level of the upper pool is maintained to be more stable, the hydroelectric generator has enough water for generating electricity when in the peak period of electricity consumption, and the electricity consumption demand in the peak period of electricity consumption can be met.

The invention discloses a steam oven which comprises a shell, a door module and an inner container, wherein the inner container is arranged in the shell; a water supply module is arranged on the inner container or the shell, and an assembling gap between the shell and the inner container is internally provided with a heat insulation component; and a steam generating and circulating device is arranged between the inner container and the water supply module, and connected with a secondary heating module. The steam oven disclosed by the invention has the advantages that through adding the steam generating and circulating device and the secondary heating module and combining with a single chip microcomputer for carrying out program control so as to cook various delicious foods, the fast food cooking can be realized, and the cooking time can be reduced; meanwhile, the water level in a steam generator keeps stable by using the liquid seal principle of the steam generating and circulating device, so that the occurrence of interstitial water supply and discontinuous steam generation is avoided, thereby improving the stability of products; and the steam oven can provide various cooking modes such as stewing, baking, high temperature roasting, and the like for the foods according to different foods or tastes, thereby removing excess fat in the foods and producing foods which accord with health requirements.

The invention discloses a tailing pond model test simulation system. The tailing pond model test simulation system comprises a water supply system, a terrain simulation system, a measuring system and a water and sand recovery system. The water supply system is communicated with the upstream of the terrain simulation system through a water conveying pipeline. The downstream of the terrain simulation system is communicated with the water and sand recovery system through a mortar channel. The water and sand recovery system is provided with a sand filter device and a water return port. The measuring system is used for measuring parameters of dam-break debris flow in the terrain simulation system. The terrain simulation system comprises a terrain simulation support. A rib mesh layer, a felt layer and a waterproof layer are installed at the top end of the terrain simulation support in sequence from bottom to top. The terrain simulation support comprises a plurality of adjustable supporting bases. The lower portions of every two adjacent adjustable supporting bases are connected through a cross beam. The rib mesh is installed at the top ends of the adjustable supporting bases. The tailing pond model test simulation system solves the problems that the terrain manufacturing process is complex and water and sand are difficult to recover during tests, the model test efficiency is improved, and the test system can be recycled.

The invention discloses a self-bucket-tipping type irrigation water amount measuring device. The device comprises a water passing tank, a tipping bucket, a water inlet gate and a measuring system usedfor measuring the irrigation frequency of the tipping bucket; the tipping bucket is rotatably connected with the water passing tank, the water inlet side of the water passing tank is provided with afirst opening matched with the water inlet gate, the water outlet side of the water passing tank is provided with a second opening matched with the tipping bucket, the front end of the tipping bucketextends out of the second opening, and the water inlet gate is slidingly connected with the first opening; in the water inlet state, the water inlet gate is in a low position so that water in an irrigation channel can enter the tipping bucket, the tipping bucket is transversely distributed in the water passing tank, the center of gravity of the tipping bucket is gradually transferred towards the front end of the tipping bucket along with the increase of the water inlet amount, when the water level in the tipping bucket reaches a calibration value, the tipping bucket tips over clockwise under the action of the gravity of the tipping bucket, the water inlet gate is synchronously driven to ascend to separate the irrigation channel from the tipping bucket, and the water in the tipping bucket flows into farmland. According to the self-bucket-tipping type irrigation water amount measuring device, intermittent and equivalent water passing is achieved through a balanced bucket tipping mechanism, and the irrigation water amount in the farmland is accurately measured.

The present water discharge valve device (28) is provided with: a water discharge valve unit (58) provided with a valve element (84) for opening and closing a water discharge opening (22a) and also with a control tube (76) for controlling the ascending and descending motions of the valve element; and a tube body (62) provided with a side wall (90b), an opening section (90c), and a switching valve (56), the side wall (90b) extending upward from the bottom surface of a water storage tank (22) so as to surround both the water discharge opening and the control tube of the water discharge valve unit and having an open upper end, the opening section (90c) being formed so as to penetrate through the side wall, and the switching valve (56) being attached to the side wall so that the switching valve (56) can open and close the opening section. A communication opening (82) for connecting the tube body and the water discharge opening is formed in a side surface which extends from the control tube of the water discharge valve unit to the water discharge opening. The opening section of the tube body is disposed at the same height as or below the upper end of the communication opening.

The invention discloses an artificial breeding method for crayfishes in a net cage. The method comprises: selecting the net cage; putting and preparing the net cage; inputting parent crayfishes; feeding the crayfishes; cleaning the net cage; and carrying out breeding management. An artificial inductive method of controlling illumination, controlling temperature, controlling water level, controlling water quality and carrying out reinforced feeding is adopted. Illumination is controlled to be less than 300 Lux, the temperature is controlled at 18-26 DEG C, control of water quality means maintaining stable water level, and control of water quality means maintaining dissolved oxygen in a water body being greater than 5 mg / L. The reinforced feeding means adding an animal feed and an artificial compound feed which accelerate gonad development of the crayfishes, cleaning the net cage periodically, and incubating egg-carrying crayfishes in a centralized manner.

The invention discloses a full-load denitrification system for boiler deep peak load regulation and an operation method thereof. The system has a structure that a main flue is sequentially provided with a tail flue shaft steering chamber, a heater and an economizer along the flow direction of flue gas; the inlet of a bypass flue is communicated with the tail flue shaft steering chamber, and the outlet of the bypass flue is set on the flue at the entrance of an SCR reactor; the economizer is connected with a water supply pipe; a No.0 high pressure heater, a No.1 high pressure heater, a No.2 high pressure heater, a No.3 high pressure heater, a water supply pump and a deaerator are provided in sequence on the water supply pipe along the opposite direction of water supply; the No.0 high pressure heater is connected with a No.0 high pressure pump-out pipe, and the No.0 high pressure pump-out pipe is provided with a No.0 high pressure pump-out pipe regulating valve. The system provided by the invention can realize the full-load denitrification of a unit and the regulation of the operating flue gas temperature by controlling the flue gas flow rate of the flue gas bypass and coupling and putting the No.0 high pressure heater into operation.

The invention discloses an intelligent instantly-heating type drinking water heating device which comprises a shell, a balance water tank, an instantly-heating type pipeline heater and a water pump. The balance water tank and the instantly-heating type pipeline heater are arranged on the shell. The balance water tank is provided with a water inlet and a water outlet. The water inlet is connected with the water pump. The water outlet is connected with the instantly-heating type pipeline heater. The intelligent instantly-heating type drinking water heating device is characterized in that a water shortage water level probe and a balanced water level probe are arranged on the balance water tank; the water shortage water level probe and the balanced water level probe are both conductors; the water shortage water level probe is electrically connected with the instantly-heating type pipeline heater; and the balanced water level probe is electrically connected with the water pump. By means of the intelligent instantly-heating type drinking water heating device, automatic control protection can be achieved for the water shortage water level and the balanced water level in the balance water tank, and the intelligent instantly-heating type drinking water heating device is simple and reasonable in structure and low in requirement for the installation process.

In order to provide a reactor power control apparatus which can maintain a stable water level when reactivity control based on control rod operation and water level adjustment is performed, this invention comprises a turbine control which calculates the load set error signal from the error between the set target generator power value and the generator power that was fed back and outputs to the turbine control apparatus; control rod control in the natural circulation boiling water reactor which calculates the control rod operation signal and outputs it to the control rod drive control apparatus; water level control inside the natural circulation boiling water reactor which calculates the water level set signal and outputs it to the feed water control apparatus; and the switch determining device which selectively outputs one of the control rod control and water level control based on the generator power that was fed back, the reactor power and water level, as well as switching rules and determination values.

The invention discloses a defective battery discharging device on a battery production line and a working method thereof. The defective battery discharging device on the battery production line is arranged on a battery conveying production line, is used for discharging defective batteries which do not pass an electrical test, and comprises a linear guide rail assembly arranged on one side of a battery conveying machine body, a mechanical arm installed on the linear guide rail assembly in a transmission mode, and a special clamp is fixedly installed on the mechanical arm; and a linear driving device and a positioning mechanism are arranged on one side of the linear guide rail set, and the linear driving device is in communication with a control system. A lithium battery production line anda fire-fighting conveying line are synchronously arranged, the fire-fighting path and waiting time are shortened for solving the fire problem of the production line, and the distance between clampingjaws can be adjusted by arranging the lead screw assemblies on the connecting parts on the special clamps, so that the clamping jaws adapt to trays of various sizes; and meanwhile, the front and rearclamping parts are synchronously taken and placed to increase the stress contact area of the tray, stabilize the gravity center of the battery in the tray and prevent the battery from falling out of the tray.

The invention discloses a concealed radial gate and belongs to the technical field of irradiation. The concealed radial gate comprises an arc-shaped flashboard, a drive assembly and a rotation assembly. The arc-shaped flashboard comprises an arc-shaped surface, a plane and two end faces at the two ends of the arc-shaped surface, wherein the arc-shaped surface, the plane and the end faces are matched for forming a sealed cavity inside the arc-shaped flashboard. A flashboard groove is formed in the bottom of a ditch. The rotation assembly is arranged inside the sealed cavity. In the non-work state, the arc-shaped surface of the arc-shaped flashboard is located in the flashboard groove, and the plane is located on the same horizontal surface as the bottom of the ditch; in the work state, under the effect of the drive assembly, the arc-shaped flashboard can rotate within the range of 0-90 degrees in the flashboard groove through the rotation assembly, the arc-shaped surface and the plane of the arc-shaped flashboard are partially located in the flashboard groove, and the part, located outside the flashboard groove, of the arc-shaped surface is used for retaining water. According to the concealed radial gate, the height of a gate weir crest is adjustable, and the energy is saved.

The invention relates to an anti-blocking negative ion air purification device which comprises a shell, an air inlet pipe, a negative ion generator arranged in the shell, an exhaust fan, a filter screen, a dredging mechanism and a water injection mechanism. According to the anti-blocking negative ion air purification device, air in the shell is exhausted through the exhaust fan; external air enters the shell; particle impurities are purified through the filter screen; water is sprayed through a spray head, and impurities in the air are dissolved in water; meanwhile, water is sprayed on the filter screen to impact the filter screen, so prevention of filter screen clogging is realized; the motor drives the hairbrush to reciprocate, so dust on the filter screen is brushed away; the motor simultaneously drives a drum to rotate, water is sprayed to each part of the filter screen, and better anti-blocking effect is achieved; sedimentation of particulate matter is accelerated through negativeions generated by the negative ion generator, better purification effect is achieved, more negative ions are generated through rotary water spraying, better purification effect is achieved, water resources are saved through the water injection mechanism, and the water level in the shell is kept stable.

The invention discloses a method for estimating water level overrun time in an open channel according to actually measured water level change conditions. The method comprises the following steps of: S1, establishing a simulation model of a channel section; S2, based on the simulation model, determining a flow change rate of the channel section under unit flow; S3, based on the simulation model, determining a flow-water level-storage capacity relationship of the channel section; S4, conducting fitting on an actually-measured downstream water level change curve, and acquiring upstream change flow according to an actually-measured water level change rate obtained by fitting and the flow change rate of the channel section under unit flow; and S5, acquiring estimated downstream water level overrun time according to the upstream change flow and the flow-water level-storage relation of the channel section. The method has the advantages that early warning can be effectively carried out, and overflow disasters and channel damage caused by overrun of a water level are prevented; corresponding reference can be provided for hydraulic regulation and control of subsequent channels; and comparedwith the early warning time obtained by only depending on the water level monitoring data under the traditional unbalanced flow, the calculation result of the method is improved in precision, and calculation efficiency is enhanced.

The invention discloses an elutriation flotation device for rubbish. The elutriation flotation device comprises an elutriation water tank, wherein a grating under water is arranged in the inner cavity of the elutriation water tank; the grating divides the inner cavity of the elutriation water tank into an upper cavity at the upper part of the grating and a lower cavity at the lower part of the grating; a compressed air outlet and a heavy material discharging device are arranged in the lower cavity; a feeding device and a light material discharging device are arranged at two ends of the upper cavity; an elutriation feeding device is arranged between the feeding device and the light material discharging device; an elutriation water feeding device and an elutriation liquid discharging deviceare arranged on the elutriation water tank; light material is taken to the upper cavity at the upper part of the grating by compressed air bubbles; heavy material sinks to the bottom of the lower cavity; the stability of water level in the elutriation water tank is ensured by the elutriation water feeding device; elutriation liquid is collected by the elutriation liquid discharging device; the inner cavity of the elutriation water tank is divided by the grating; light material discharging operation and heavy material discharging operation are separately performed in the upper cavity and the lower cavity; the light material is well separated from the heavy material; and the working efficiency is higher.

The invention relates to steam generating devices, in particular to a safe microwave steam generating device capable of preventing microwave leakage. The microwave steam generating device comprises a cavity body, a magnetron and a microwave controller, wherein the cavity body is provided with a water filling port and a steam outlet; the magnetron is connected with the cavity body; the microwave controller is used for controlling the magnetron. An upper microwave separation net located at the steam outlet and a lower microwave separation net located at the water filling port are further arranged inside the cavity body. By the adoption of the technique, microwave leakage can be prevented, human body safety is effectively guaranteed, and damage caused by microwave leakage is avoided.

The invention discloses a novel mandarin fish ecological breeding technology based on high yield. The novel mandarin fish ecological breeding technology based on high yield comprises the following steps: selecting addresses for constructing a main mandarin fish raising pond; sterilizing the main raising pond and introducing fresh water; arranging weed strips and weed regions in the main mandarin fish raising pond; selecting suitable forage fishes for mandarin fish fries; throwing mandarin fish fingerlings; soaking forage fish pellet feed with astragalus membranaceus and atractylodes macrocephala koidz leach solution; carrying out raising management and water quality management; preventing and treating fish diseases; and launching the fishes on the markets. The shortcoming that an existingmandarin fish raising method is low in efficiency and low in raising yield is overcome, the novel mandarin fish ecological breeding technology based on high yield is provided, the forage fish feed istreated by a disease and pest prevention and control means and Chinese herbal medicines, the problem that mandarin fishes are rich in drugs through a biologic chain is solved, and the raised mandarinfishes can pass severe drug residue detection; and a plurality of water-oxygen machines are added, the problems that the survival rate of the mandarin fishes is low due to oxygen deficiency, and thusthe yield is low are solved, and the yield and economic benefit of a mandarin fish pond are greatly increased.

The invention discloses a method for raising first instar crab fingerlings, which is characterized by including a primary stage and a secondary stage. The method comprises the following steps: preparing in an early stage, raising crab larvae, transferring crab larvae out of culture boxes, raising crab larvae in open facilities, feeding baits, performing water quality management, and treating crab diseases. The method of the invention is advantageous in that the conditions are simple and feasible, superiority of the method is obvious, the technical scheme is reasonable, yield of crab fingerlings by culturing crab larvae is improved, and the method lays foundation for river carb industry structural regulation.

The invention discloses a composite constructed wetland system for sewage (waste water) treatment and ecological restoration. The composite constructed wetland system comprises four parts including a pressure regulating inspection well, a high-load hydrolysis tank, a natural reaeration / sedimentation integrated device and a constructed wetland, and the constructed wetland further comprises a constructed wetland body, an anti-blocking inlet water distributor, a strengthened dephosphorization denitrification groove, an outlet water collector and the like. The pressure regulating inspection well is located at the most front end of the system, sewage sequentially passes through the pressure regulating inspection well, the high-load hydrolysis tank and the natural reaeration / sedimentation integrated device to enter the constructed wetland, inlet water is distributed through the anti-blocking inlet water distributor, and the water is collected and discharged through the outlet water collector after being subjected to treatment of the constructed wetland body and the strengthened dephosphorization denitrification groove. The composite constructed wetland system is mainly used for urban sewage treatment, deep purification of initial stage rainwater and industrial tail water and the ecological restoration of polluted ground water bodies such as rivers and lakes.

The embodiment of the invention discloses a boiler wet operation water supply control method and device and a computer storage system. The method comprises the steps that the current water level value of a water storage tank of a steam-water separator is obtained; the opening degree of a recirculation pump flow adjusting valve is adjusted according to the current water level value and the water level set value of the water storage tank so as to control the water level of the water storage tank; the current flow value of the inlet end of an economizer is obtained; the opening degree of a starting adjusting valve is adjusted according to the current flow value, the flow set value of the inlet end of the economizer and the current recirculation flow value of the recirculation pump flow adjusting valve so as to control the water supply amount of a boiler; and the flow value of the inlet end of the economizer is adjusted according to the current recirculation flow value of the recirculation pump flow adjusting valve and the water supply amount of the boiler so as to control the water level of the water storage tank. By means of the embodiment, the water level of the water storage tank can be adjusted more quickly and sensitively, and the water level of the water storage tank is kept stable.

The utility model discloses a water boiling device with an instant heating type water boiling chamber, which is characterized in that: the water boiling device comprises a base body, a balanced water tank, a water pump and a water boiling chamber; the balanced water tank is provided with an inlet, an outlet and a backflow opening; the water boiling chamber is internally provided with a heater; the water boiling chamber is provided with a water inlet and a water outlet; the water outlet is communicated with a water outlet nozzle on the base body; the water inlet is connected with the outlet of the balanced water tank; the inlet of the balanced water tank is communicated with a water pump; and the water pump is communicated with a water source. The water boiling device has the following advantages: simple and reasonable structure, no product use place restriction by outer water pressure, capability of ensuring the drinking water of people to satisfy the temperature requirement, small volume and small weight.

The invention discloses a frost-heaving ratio and thaw-settlement coefficient simultaneous determination tester for a soil body. The tester comprises a soil body filling barrel with two run-through ends, wherein a water tank is arranged at the bottom of the soil body filling barrel; the water tank is connected with a water source supplementing device for keeping a water level in the water tank constant; the upper part of the soil body filling barrel is connected with a low-temperature stabilizing system for enabling the soil body to be in a low constant temperature state and a plurality of displacement sensors for detecting displacement of the soil body; a plurality of temperature and humidity sensors for detecting the moisture content and the temperature of the soil body are arranged on the soil body filling barrel in an inserting manner; the displacement sensors and the temperature sensors are respectively connected to a main control computer through a displacement data acquirer and a moisture and temperature recorder. On the premise of guaranteeing a stable water level, the tester can simultaneously measure a frost-heaving ratio and a thaw-settlement coefficient of the soil body under two conditions with water source supplementation and without water source supplementation, and can further measure changes of a temperature field and a moisture field of the soil body in a frost-thaw process, so that a moisture migration rule that the moisture field is changed with the temperature field in a gradient manner can be explained.

The invention discloses a clean water tank water suction well system and a using method thereof. The clean water tank water suction well system comprises a chlorine adding contact tank, a clean watertank, a main water suction well, an auxiliary water suction well, an anti-backflow device, a flow regulating valve and a water pump water suction pipe, wherein the chlorine adding contact tank is communicated with the clean water tank through a high weir; the chlorine adding contact tank is communicated with the main water suction well through a low weir I; the outlet well is communicated with themain suction well through a pipeline and the flow is regulated through a flow regulating valve, the main suction well is communicated with the auxiliary suction well through the low weir II, the highweir, the low weir I and the low weir II are sequentially arranged from high to low, the clean water tank is communicated with the auxiliary suction well through a backflow prevention device to supply water for the auxiliary suction well, and the main suction well and the auxiliary suction well are respectively externally connected with a plurality of water pump suction pipes to supply water forthe city. According to the clean water tank suction well system and the use method thereof, the energy consumption is saved, the chlorination disinfection effect is improved, the high-water-level self-irrigation starting is realized under the condition that a vacuum pump is not arranged, the operation management is convenient, the construction cost is reduced, the ventilation condition of a pump room is improved, and the personnel patrol is more convenient.

The invention relates to a pond circulating aquaculture water treatment system. The pond circulating aquaculture water treatment system comprises a biological purification tank arranged at a central position of an aquaculture pond, wherein a separation well is arranged at a central position of the biological purification tank; a lifting pump is installed in a circulating pump well at a central position of the separation well; the pond circulating aquaculture water treatment system further comprises an ultraviolet disinfection well arranged on an outer side of a biological purification tank wall; an inner end of an embedded water outlet transverse pipe below a foundation slab of the aquaculture pond is connected with a water outlet inner longitudinal pipe, and an outer end is connected with a water outlet outer longitudinal pipe; an upper end opening of the water outlet inner longitudinal pipe is located in the disinfection well and a water outlet of the water outlet outer longitudinal pipe is located below a liquid level of an outer edge of the aquaculture pond; a sump pit is arranged at a central position of the foundation slab of the aquaculture pond and the sump pit is connected with a blow-down pipe; a separation well blow-down pipe is installed between the separation well and the sump pit. Circulating water filtration, biological purification and ultraviolet disinfection treatment are completed in the aquaculture pond, pump power is needed only in a return water lifting process, no power is needed in other circulating and blow-down processes, the power consumption is reduced and the water treatment efficiency is improved.

The invention discloses an Asian carp mixed breeding technology capable of increasing the utilization rate. The technology comprises the steps of pond address selection, fish pond cleaning, sterilization and disinfection, breeding water introduction, fingerling putting, feeding management, water quality management, fish disease control and fishing sales; by means of the disease and pest control means, the survival rate of Asian carp is increased, the bred Asian carp can pass strict medicine residue detection, secondary disinfection is conducted on a pond by means of tea cakes, and part of teacake residues are left for serving as nourishment fertilizing the water quality; before fingerling putting is conducted, fishes are soaked with a saline solution so as to kill germs and parasites which parasitize the fishes; multiple aerators are additionally arranged, the problem that due to oxygen deficit, mandarin fishes are low in survival rate, and then the yield is low is solved, and the yield and the economic benefit of the mandarin fish pond are greatly increased.

The invention discloses a rotary open-close type irrigation water metering device. The rotary open-close type irrigation water metering device comprises a water tank (5), a swing mechanism, a limitingmechanism for limiting the swing mechanism and a water metering mechanism, wherein the water tank (5) is mounted on a protection slope (1); a water inlet (3) is formed in the water tank (5) for communicating water positioned inside the protection slope (1); a water outlet (16) is formed in the water tank (5) for communicating a farmland (15); and the swing mechanism, the limiting mechanism and the water metering mechanism are mounted in the water tank (5). An intermittent water metering method is used, the overall water quantity is calculated by adding up the single water quantity and drainage frequency of the water tank, and the metering precision is higher than that of an ordinary continuous water metering device. Circulating water inlet and drainage are realized by using a floating pinhole interlocking mechanism and a swing valve mechanism, the trigger action is rapid, the control precision is high, and the single water quantity stability is high.

The invention discloses a method for constructing a pond suitable for frogs to inhabit in a green land. The method comprises the steps that a pond body is excavated in the green land, a waterproof blanket and a clay layer are laid in the pond body to serve as a waterproof layer, and a planting soil layer is laid on the clay layer; various submerged plants are planted on the bottom face of the pondbody, local emergent aquatic plants are planted in a land and water transition zone, and therefore a small ecosphere suitable for survival of small aquatic organisms such as the frogs is constructedin the pond body, the green land such as the urban near-water green land and the urban open green land meets the growth and reproduction requirements of amphibians such as the frogs and other small aquatic animals, a small ecological system organically combining animals and plants is constructed in the green land, and the ornamental value of landscape water is reserved; and due to the fact that the small ecological system is constructed in the water, the biodiversity of the water in the green land can be greatly improved, a certain adjusting effect is achieved on the micro climate zone aroundthe green land, and the ecological effect of the water such as the pond in the green land is remarkably improved.

The invention belongs to the technical field of shafts for coal mine, and particularly discloses a method for preventing a shaft from cracking on an automatic supply water loss layer water level of an alleviation water-bearing layer. The method comprises a structure of an automatic supply water drill hole and a method, wherein the automatic supply water drill hole and the upper group of water-bearing layer are corresponding provided with a set of drain pipes (bridge-type flower pipes), a middle water separating pipe section is a solid pipe, a set of water filling pipes are corresponding arranged on the middle and lower groups of water-bearing layer, and the bottom is a sand setting pipe; the water of the alleviation water-bearing layer enters into water filling holes through gravels and the drain pipes arranged at the periphery of the drill hole, the water fills a water loss layer through the water filling pipes of the water loss layer under the action of the water level differential pressure, and a purpose that the water supply can stabilize the water level is achieved, gushing sands in a water supply process precipitates the bottom sand setting pipe, the water filling pipe is prevented from plugging, the water filling effect is guaranteed, and a condition that the water level falls so as to cause the transformation and crack of the well wall is reduced and eliminated.

The invention discloses a hydrogeological parameter measuring method based on a circular fixed water level boundary constant flow artesian fully penetrating well unsteady flow pumping test with a finite size. The method comprises the following steps: establishing a standard curve of the circular fixed water level boundary constant flow artesian fully penetrating well unsteady flow pumping test through mathematical transformation according to a circular fixed water level boundary constant flow artesian fully penetrating well unsteady flow formula; drawing an s-t measured curve; placing the measured curve onto the standard curve, performing relative displacement when corresponding coordinate axes are parallel to each other, until the two curves overlap; selecting a random matching point, marking a corresponding coordinate value of the matching point, and calculating a permeability coefficient and a storage coefficient of a water-bearing stratum. According to the method, a hydrogeologicalparameter of the water-bearing stratum is determined by using a wiring method, and the permeability coefficient and the storage coefficient of the water-bearing stratum can be calculated simultaneously. Because unsteady flow pumping test data is used, an obtained calculation result is high in precision. The method has a very good application promotion value.