288 results about "Mine site" patented technology

The invention discloses a repair medicament for compound heavy metal polluted soil. The repair medicament comprises the following components: phosphate compound, soluble ferric salt, magnesium oxide, inorganic clay, an organic chelating agent and silicon dioxide, wherein the phosphate compound adopts one or the combination of phosphate, hydrophosphate or dihydric phosphate. The repair medicament is applicable to compound heavy metal polluted farmland soil, compound heavy metal polluted industrial site soil and compound heavy metal polluted mine site soil. Stirring and mixing of the repair medicament and the heavy metal polluted soil belong to in-site stirring and mixing or off-site stirring and mixing. The repair medicament is short in repair cycle and low in cost, has wide spectrum, and is simple in technical operation.

The invention relates to an underground locating and monitoring system which comprises a client, a server, a data communication box, a radiofrequency card and a plurality of card readers arranged at different positions underground, wherein the card readers read information on the radiofrequency card in a readable range, generate corresponding position information through the information on the radiofrequency card and send the information on the radiofrequency card and the corresponding position information to the data communication box, the data communication box retransmits and stores the information on the radiofrequency card and the corresponding position information to the server, and the client remotely visits the information on the radiofrequency card and the corresponding position information stored on the server. By implementing the invention, online monitor, control and management of an underground mine field can be realized, and the conditions and underground concrete positions of miner lamp users can be automatically counted and reported so as to realize automatic attendance check of downhole personnel and location of underground operators.

The invention relates to a dimension and dip angle adjustable type coal mine stope similar model test system and method. The system comprises a model bearing frame, a pressure loading device, a model frame rotating device, a centralized control device and a monitoring device, wherein the model bearing frame is used for laying a stope similar model; the centralized control device is used for sending a pressure application control instruction to the pressure loading device according to a pressure value set by the test and sending a rotation control instruction to the model frame rotating device according to a dip angle value set by the test; the pressure loading device is used for applying pressure to the model bearing frame according to the pressure application control instruction; the model frame rotating device is used for enabling the model bearing frame to rotate by the set dip angle according to the rotation control instruction; the monitoring device is used for monitoring the state of the stope similar model in an excavation process. With the adoption of the system provided by the invention, the pressure characteristics of a coal working face of different dip angles, different buried depths and different coal seam thicknesses of a coal mine site can be simulated in a laboratory.

The invention discloses a method for fixing pollutants in pollution source soil in abandoned mine fields and application thereof. The fixing method comprises the steps of loosening the soil, digging holes, adding modifier and fertilizer to balance the soil in the holes, planting energy trees in the soil in the holes, sowing pioneer grass seeds on the topsoil in the holes, and the like. The invention uses chemical modifier and fertilizer to modify the planting condition of the polluted soil in mine areas, then interplants pioneer grass, fast-growing energy trees and other plants to effectively fixe substances such as heavy metal pollutants in soil, avoid the pollutants from being discharged to downstream areas in the form of acidic mine waste water to pollute the environment and damaging the ecology.

The invention discloses a method for strengthening regional gas extraction through hydro-thermal coupling fracturing. The method comprises steps as follows: firstly, a main fracturing hole, branch fracturing holes and lead holes are sequentially formed in a coal seam roadway through construction, the main fracturing hole is formed in the central position of an equilateral triangle, the opening positions of the branch fracturing holes are distributed at three vertexes of the equilateral triangle separately, the borehole bottom locations of the branch fracturing holes are converged in a center line of the equilateral triangle, the lead holes are located in a circle with the main fracturing hole serving as a center of the circle, and the radius of the circle is 5-15 m; fracturing equipment comprises water injection equipment and a powder injection device, and the water injection comprises an intelligent water tank and a fracturing pump. Quicklime powder in the powder injection device is injected into the main fracturing hole and the branch fracturing holes through underground air pressure; the water injection equipment performs hydraulic fracturing on the main fracturing hole, the quicklime powder is carried by high-pressure water to enter cracks, meanwhile, the quicklime powder and water have a thermal reaction to generate a large amount of heat, and hydro-thermal coupling fracturing is realized; with the implementation of the method for strengthening the regional gas extraction through the hydro-thermal coupling fracturing, the regions influenced by fracturing are increased, the concentration of extracted gas is increased, the effect is remarkable, and demands of work such as regional gas treatment in a coal mine site and the like are met.

The invention provides a method for maintaining flow conductivity of seams near the wellbore area. The method comprises the steps of firstly, preparing a temporary plugging steering working solution, wherein the temporary plugging steering working solution comprises degradable temporary plugging agents, an equidensity proppant and a low-viscosity carrying liquid; carrying out staged fracturing, wherein the pump injection sequence is a prepad fluid, a sand-carrying fluid and the temporary plugging steering working solution; and after complete fracturing, waiting till the temporary plugging steering working solution is degraded, carrying out fluid drainage, and ensuring that the proppant remains at the seams and forms a seepage channel. According to the method, the degradable temporary plugging agents are formed through mixing multi-scale combined degradable temporary plugging agents according to a certain proportion, the large-particle degradable temporary plugging agents are blocked at the end openings of the seams, and the clearances among the large-particle degradable temporary plugging agents are filled with the small-particle degradable temporary plugging agents, so that the plugging effect is effectively and quickly improved, after fracturing, the degradable temporary plugging agents and the proppant exist in the hydraulic fracture seams, after the degradable temporary plugging agents are degraded, the proppant maintains the flow conductivity of a near mineshaft, the risk that the seams near the wellbore area are closed and do not have the flow conductivity is reduced, and seepage channels of a gas reservoir and a mineshaft are maintained.

The invention discloses a coal flow control device based on a CAN bus. The coal flow control device based on the CAN bus comprises an MCU module (1). A CAN module (3), a display screen (5) and buttons (6) are arranged on the periphery of the MCU module (1), wherein the CAN module (3), the display screen (5) and the buttons (6) are all connected with the MCU module (1). A power source (2) supplying power to the control device is further arranged on the periphery of the MCU module (1). The input of the MCU module (1) is connected with an on-off status sensor (7) and a start-stop sensor (8) of the belt conveyer (10). The output of the MCU module (1) is connected with a protective device host (9) driving the belt conveyer (10). For a coal mine site with multiple belt conveyers, each belt conveyer is provided with the flow control device, the flow control devices conduct communication through the CAN bus, each flow control device conducts centralized control over the corresponding belt conveyer based on signals fed back by the on-off status sensor and the start-stop sensor of the flow control device according to the needs, start and stop are intelligently conducted according to the conditions of coal on each belt conveyer, idling of each belt conveyer is avoided, and electricity is greatly saved.

This invention is directed to a means for transporting a mine roof support set including a plurality of nested containers. Each container in the set has a progressively smaller cross-sectional dimension, or a tapered, frusto-conical shape, to allow the containers to be nested one within the other. The plurality of nested containers allows more efficient transportation of the mine roof support set to a mine site. The containers can be separated at the mine site and filled with a load-bearing material. The containers filled with the load-bearing material are then placed with their longitudinal axis between a mine roof and a mine floor.

A magnesium suppressant/flocculant for use in separating dolomite from calcium phosphate. The magnesium suppressant/flocculant may be applied at a mine site prior to subjecting ore fractions to phosphate flotation or at a chemical plant after grinding.

The invention provides a method for evaluating multi-level development potential of whole-loading oil field in high water-cut period based on improved QFD. The core tool of the method is an evaluationhouse, which consists of nine parts, namely a development effect evaluation index matrix, a technical measure matrix, a development effect index and technical measure correlation matrix, a technicalmeasure first-level, second-level and third-level application potential matrix, and a first-level, second-level and third-level development potential matrix. The multi-level development potential of whole-loading oil field in high water-cut period after different technical measures are carried out can be analyzed. Compared with the numerical simulation, the method is simple and convenient: after the mutual correlation matrix is determined, the application potential of various levels of technical measures is evaluated, and the multi-level development potential of the target oil field can be calculated; at the same time, the method also realizes the development potential evaluation corresponding to the technical measures of different grades which are already applied in the local block and are applied in the same block and are to be applied in the test stage, and has higher reference value for the actual production of the mine field.

The invention relates to a high-permeability oil and gas reservoir drilling and completion fluid protective capability mine field evaluating device in the oil and gas industry. The device mainly comprises a barrel, a plunger, a motor, a rotary blade, a sealing sleeve, a standard core, a pressure sensor, a fluid outlet and inlet switch, a high pressure nitrogen gas cylinder, a pressure reduction valve, a rock sample steel base, a connection pipeline, a computer and a clamping device base. In the drilling and completion fluid damage evaluation process, fluid pressure provides confining pressure for a rock sample, the drilling and completion fluid volume is a constant value, and the rock sample is prepared from target stratum outcrop. The rock sample of reservoir rock is damaged in a constant-pressure mode, and the rock sample gas log permeability damage degree is rapidly evaluated by monitoring the attenuation process of gas pressure in the barrel. The principle is reliable, operation is simple, and the gap of the high-permeability oil and gas reservoir drilling and completion fluid dynamic damage evaluating device for a mine field is filled. Drilling and completion fluid reservoir protective capacity evaluating device miniaturization is achieved, and conditions are provided for instant, timely and simple drilling and completion fluid protective capability evaluation of the mind field.

The invention provides a method for identifying oil-water layers in tight sandstone reservoirs, the method comprising the following steps: (1) performing nuclear magnetic resonance T2 spectrum measurement on oil- and water-containing tight sandstone reservoir cores obtained from sealed coring to obtain core oil and water phases T2 spectrum, calculate the movable fluid saturation M of the rock core; (2) process the rock core to shield the nuclear magnetic resonance signal of the water in the rock core, carry out the NMR T2 spectrum measurement on the processed rock core again, obtain the core oil phase T2 spectrum, calculate The oil saturation S of the rock core; (3) comparing the movable fluid saturation and the oil saturation, and judging the type of the oil-water layer of the rock core. The present invention utilizes the nuclear magnetic resonance technology to analyze and study the on-site airtight coring cores of tight sandstone reservoirs in oil field experiments, which can accurately identify the oil and water layers of tight sandstone reservoirs and determine, interpret and evaluate them, and can also calibrate and compare well logging interpretation results. The well results are accurate and the error is small.

The invention discloses a raw coal sample making method. The raw coal sample making method comprises the following steps of: (1) firstly, placing an original coal block taken from a coal mine site in a box body, casting concrete into the box body to ensure that the concrete is full of all gaps between the original coal block and the box body; (2) after the concrete is completely hardened, sampling the coal block by using a drilling sampler; and (3) finally, grinding the drilled coal sample into a coal sample with a size required by an experiment, and placing the made original coal sample in a drying box for later use in the experiment. According to the invention, the effective raw coal sample making method is provided to increase the making success rate of the raw coal sample.