46results about How to "Expand the scope of the region" patented technology

The invention provides an electronic police device for monitoring red-light and blocking intersection rushing across and a method for monitoring the same. The device comprises a vehicle detection module, a picture-taking module and a license plate recognition module, wherein the vehicle detection module is applied to detecting the states of traffic lights and information on passing vehicles; the picture-taking module takes pictures of a vehicle after receiving a trigger signal from the vehicle detection module, and sends the pictures to the license plate recognition module so as to recognize the license plate of the vehicle; the electronic police device is also connected with a command central system which comprises a suspect vehicle database for storing license plate information of vehicles, and the license plate recognition module compares the recognized license plate with the information in the database so as to find out the suspect vehicle and perform long-distance alarm. The electronic police device and the monitoring method can expand the red light rushing across automatic recording function, and perform region linkage control on a plurality of monitoring points.

The invention relates to a stereotactic radiotherapy system quality control detection motif and method. The motif part mainly comprises a multi-stage phantom connected by a phantom connection rod. A head mold groove is arranged on one end of the multi-stage phantom. The head mold groove is connected with one end of a head mold connection rod. The other end of the head mold connection rod is connected with a head mold. The head mold is provided with a head mold insertion plate groove. The multi-stage phantom is provided with an X-Y direction insertion plate groove, a Y-Z direction insertion plate groove and an ionization chamber insertion plate groove. According to the motif provided by the invention, a novel structure is designed, and each part of a human body can be accurately detected.

The invention discloses a melt-blown polypropylene material as well as a preparation method and application thereof. The melt-blown polypropylene material is prepared from the following components inparts by weight: 65-80 parts of melt-blown polypropylene, 20-35 parts of low-isotacticity polypropylene and 2-3 parts of stearate. According to the invention, low isotacticity polypropylene LMPP and melt-blown polypropylene are blended; the hand feeling of the melt-blown non-woven fabric can be effectively improved; the prepared melt-blown non-woven fabric has the advantages of being soft in handfeeling, high in strength, high in toughness and the like; meanwhile, the particle filtering efficiency and air permeability of the melt-blown non-woven fabric can be improved, and the material has wide application prospects in preparation of high-filtering and low-resistance female / child masks which are required to be perfectly attached to the face.

The invention discloses a cloud base height estimation method for a single-layer cloud facing flight vehicle navigation guidance. The method comprises that the cloud layer is divided into cloud of different attributes according to data of different wavebands in an Aqua satellite; the number of cloud layers in Cloudsat and the cloud top temperature and optical thickness in Aqua are obtained from asatellite database; the Cloudsat satellite data matches Aqua satellite data in the same latitude and longitude; matched data is divided into a group of training data and a group of test data; a trained model is used to determine whether cloud of different attributes belong to the single-layer cloud; the cloud layer thickness of the single-layer low cloud is calculated by using a physical mathematical model, and a calculation result and data in the Cloudsat serve as parameters in a contrast adjustment model; a model in which a parameter is modified is used to calculate the cloud base height again; and the cloud base height can be obtained by subtracting the cloud layer height from the cloud top height. The cloud base height of the single layer cloud can be calculated, an algorithm is less complex, and the calculation range of the cloud base height is widened.

The invention discloses a corn seed plasma treatment method and a matched cultivation method, wherein the methods are suitable for ecological regions at the northern latitude of 33 degrees to 40 degrees and the altitude of 700 m to 1300 m. According to the corn seed plasma treatment method, a DL-2 type plasma processor produced by Dalian BoShi Plasmas Technology Co., Ltd. is adopted, the treatment dosage ranges from 1.6 A to 2.0 A, treatment is conducted twice, the seed flow ranges from 5.0 kg / min to 5.5 kg / min, and seeds are sown 6 days to 12 days after the treatment. The matched cultivation method includes the steps of firstly, selecting the appropriate variety in the growth period; secondly, reasonably applying fertilizer; thirdly, watering the seeds at appropriate time. Compared with the prior art, the corn seed plasma treatment method and the matched cultivation method have the advantages that the per unit area yield of corn can be increased by 30% or higher, the plastic film mulching investment can be saved by RMB 90 per mu, the corn cultivation region area can be enlarged, the utilization rate of ecological resources is increased, and the income is increased by RMB 700 or more per mu in the land with the same soil fertility and cultivation management cost compared with the income obtained through plantation of side crops, namely, hulless oat. The corn seed plasma treatment method and the matched cultivation method are the corn production increasing technology with quite high practicability.

The invention discloses a hanging basket for bridge construction. The hanging basket structurally comprises a mounting bracket, a fixed derrick, a construction basket, a main transmission rod, an auxiliary transmission rod, a protective barrier, a protective net, a driver, a fastening bolt, a fastening pin, a protective bottom plate, a lower guide wheel, a lower roller, an upper roller, an upper guide wheel, a driving gear, a driving roller, a positioning plate and a driving hand wheel. The hanging basket has the advantages that the driver realizes driving control of the driving roller by turning the driving hand wheel, so that the driving gear is engaged with a transmission tooth surface, the moving function of the construction basket is achieved, the whole operation process is convenientand rapid, construction area coverage is more effectively improved, and working efficiency is increased.

The invention discloses a monitoring method of a complex and dangerous scene and a corresponding monitoring system. The method comprises the following steps: performing the monitoring by using a way of combining an unmanned vehicle with a multi-wing unmanned plane, realizing the through by using the unmanned vehicle carrying the multi-wing unmanned plane for the unmanned vehicle reachable scene, and performing the monitoring by using an onboard monitoring device; performing the monitoring by using the multi-wing unmanned plane to fly and using the onboard monitoring device for the unmanned vehicle unreachable scene, wherein the multi-wing unmanned plane performs the positioning communication with the unmanned vehicle to realize the landing on the unmanned vehicle. The invention further provides the system for realizing above-mentioned method. By using the monitoring method disclosed by the invention, the problems that the unmanned plane is deficient in cruising ability and a wireless signal is easy to lose can be effectively solved, the continuous operation in larger region can be realized, the environment obstruction is overcome, and more monitoring information can be acquired.

The invention belongs to the technical field of terminal control, and particularly relates to a multi-system multi-gateway intelligent control system, which comprises a cloud server, a plurality of independent main systems, a plurality of gateways and a plurality of terminal devices, wherein the independent main systems are connected to the cloud server; each independent main system comprises a plurality of subsystems; the gateways are respectively connected to the subsystems in a one-to-one manner; and the terminal devices are connected to the gateways respectively. The gateways are arranged,a user can remotely control a plurality of mobile terminals connected to different gateways only by a single account, and the control is more convenient; and each gateway can be connected to a wireless network through different IP addresses, the regional limitation of a single gateway is overcome, the data transmission sensitivity is improved, and a data signal is stronger.

The invention discloses a mesh electrode tandem type electrohydrodynamic micro-pump and a method. The mesh electrode tandem type electrohydrodynamic micro-pump comprises a left electrode supporting guide rod and a right electrode supporting guide rod, and is characterized in that a plurality of mesh emitting electrodes are distributed at intervals in an array mode along the axial direction of the left electrode supporting guide rod; a plurality of mesh collecting electrodes are distributed at intervals in an array mode along the right electrode supporting guide rod; the mesh emitting electrodes and the mesh collecting electrodes are arranged in a mutually staggered manner so as to form a comb-shaped electrode array with the positive and negative electrodes being arranged in a staggered manner in the axial direction; the unoccupied ends, which extend out of the comb-shaped electrode array, of the left electrode supporting guide rod and the right electrode supporting guide rod are respectively connected with a positive electrode and a negative electrode of a power supply; and the space enclosed by the comb-shaped electrode array forms a working region of the mesh emitting electrodes and the mesh collecting electrodes and a circulating channel of a working medium. The comb-shaped electrode array is large in area, the range of an electrohydrodynamic action is increased, and an ion dragging effect is enhanced. Meanwhile, the needle-shaped structure enhances point discharge, and the power effect of the electrohydrodynamic micro-pump is improved.

The invention discloses integrated circulating machining equipment for a metal protection plate in a robot. The integrated circulating machining equipment comprises an inner sleeve table, a first conveying disc and a tail grinding base, the first conveying disc is horizontally arranged, the inner sleeve table is located above the first conveying disc, a second conveying disc is further arranged above one end of the first conveying disc, and a first motor is arranged at one end of the outer wall of one side of the first conveying disc. The integrated circulating machining equipment has the beneficial effects that the two ends of the metal protection plate are stamped and shaped through two stamping blocks correspondingly, a fifth motor on a transferring mechanism drives a first lead screw to rotate, the first lead screw drives a sliding plate and a loading disc to be adjusted and moved leftwards and rightwards through the thread effect, the stamped positions of the metal protection plate by the stamping blocks are changed, furthermore, a sixth motor drives the loading disc to rotate and adjust, and the stamped positions of the metal protection plate are changed, so that on one hand,the stamping treatment efficiency and comprehensiveness of the metal protection plate of the equipment are greatly improved, and on the other hand, it is guaranteed that the stamping quality of the equipment on the metal protection plate is higher.

The invention provides an automatic charging apparatus and charging control method for an unmanned aerial vehicle. The automatic charging apparatus comprises a shell, a first solar battery panel and a second solar battery panel, an energy storage module, a wireless charging module, and a control module, wherein the unmanned aerial vehicle is placed in the interior of the shell; the first solar battery panel and the second solar battery panel are arranged on the top of the shell and used for converting solar energy into electric energy; the energy storage module is used for storing the converted electric energy; the wireless charging module is connected with the energy storage module and used for charging the unmanned aerial vehicle; and the control module is used for obtaining charging request information sent from the unmanned aerial vehicle and generating a charging control signal according to the charging request information; and the charging control signal is used for controlling the wireless charging module to charge the unmanned aerial vehicle. By adoption of the apparatus and the method, guarantee is provided for electric power inspection of the unmanned aerial vehicle.

The invention provides a gas prevention and control method for gob-side entry self-pressure-relief outburst-elimination rapid tunneling, and relates to the technical field of mine gas prevention and control. According to the gas prevention and control method, a pressure relief zone area, which is close to a coal body, of a upper section stope face is accurately determined, so that roadway tunneling in the pressure relief zone area is guaranteed; additionally, the outburst of gas of a coal seam on the inner side of a roadway is eliminated, the number of gas extraction drill holes is reduced, the work amount of the drill holes is reduced, the tunneling speed of the outburst coal seam is obviously increased, and the outburst risk in a tunneling process is greatly reduced; in the roadway tunneling process, the range of the pressure relief zone area is further enlarged, the gas extraction concentration and the extraction amount of the gas extraction drill holes are increased to a certain degree, the gas extraction time is shortened, and the gas pressure and content of the coal seam are rapidly reduced; and plugging materials are used for guniting and plugging the coal wall of the outerside of the roadway, and a damaged fracture gas seepage channel is effectively plugged, so that the inrush of goaf gas is reduced, and the concentration of return current gas is prevented from exceeding the limit.

The invention discloses an intelligent teacher's desk for an indoor conference. The desk comprises a supporting bottom plate, a sliding panel, a supporting base and a power component. The supporting bottom plate comprises a table top body, two clamping plates and a plurality of pressing springs, extending plates are arranged on the two sides of the table top body, the sliding panel comprises a moving plate, a plurality of telescopic columns are distributed on the moving plate, the telescopic columns are sleeved with buffer springs, and the telescopic columns are connected with the supporting sliding plate through the supporting plate. According to the invention, the clamping plates and the pressure springs are designed in the supporting bottom plate; the sliding panel can be compressed andcontrolled; the stability of the sliding panel during movement and use is improved; a power component is matched with the teeth on the sliding panel to drive the sliding panel to slide, so that the area of the teacher's desk is enlarged, the using area range is widened, meanwhile, different inclination angles and heights of the teacher's desk can be adjusted through the design of the electric telescopic rod on the supporting base, and different requirements of users are met.

The invention discloses a bucket elevator with an automatic cleaning function, belongs to the technical field of elevators, aims to solve the problems that when a bucket elevator in the prior art conveys powdery materials, the material loss ratio is high, the side wall of a chamber above a discharge port is hard to clean, provides the bucket elevator which can automatically clean the side wall ofthe chamber above the discharge port and is suitable for elevators. The bucket elevator comprises a machine base, a machine head and a machine cylinder. The side face of the machine base is provided with a feed port. The machine base is internally provided with a tail wheel. The machine head is internally provided with a transmission device. The transmission device is connected with the tail wheelthrough a winnowing pan belt, and the winnowing pan belt is evenly provided with a plurality of winnowing pans. One side of the machine head is provided with a buffer chamber communicating with the machine head, a discharge port is formed below the buffer chamber, and the side wall of the buffer chamber is connected with a cleaning brush in a hinged manner. A head wheel of the transmission deviceis provided with a rotating nail in an eccentricity manner, and the rotating nail is connected with the end, far away from a hinged point of the cleaning brush and the side wall of the buffer chamber, of the cleaning brush through a connection rope.

The invention relates to the technical field of aluminum alloy hub detection equipment, in particular to an aluminum alloy hub defect detection device assembly which comprises a placement unit and a detection unit. The placement unit comprises a fixed seat, a placement seat, a supporting roller and a servo motor; the detection unit comprises a convex lens, a plane mirror and a CCD industrial camera. The detection device assembly has the beneficial effects that the CCD industrial camera in the detection unit is used for detecting the appearance defects of the peripheral surface of the aluminumalloy hub, manual detection is not needed, and the detection efficiency and precision are improved; a convex lens and a plane mirror are arranged, light imaging of a large-range area image of the peripheral surface of the aluminum alloy hub is shrunk through the light condensation capacity of the convex lens, the shrunk light imaging is reflected into the CCD industrial camera through the plane mirror, and thus the area range of single detection of the CCD industrial camera can be larger, and the detection efficiency is further improved.

The invention discloses an outdoor monitoring device which comprises a monitoring fixing tank. A rotating cavity with an upward opening is fixedly arranged in the monitoring fixing tank; a rotating assembly is fixedly arranged in the rotating cavity and drives the whole equipment to rotate, so that the equipment can be used for monitoring other areas without the need to be re-installed, and the convenience and the high efficiency of the equipment are improved; a transmission cavity is arranged in the rotating assembly; and a transmission assembly is arranged in the transmission cavity. The outdoor monitoring device provided by the invention is simple in structure and convenient to operate; a monitoring head is effectively rotated so as to be adjusted through the transmission assembly, so that the accuracy in monitoring is improved; secondly, the monitoring range is effectively adjusted through a lifting assembly and a swinging assembly, monitoring can be carried out at different monitoring angles, and then the monitoring area and the application range are enlarged through a pushing assembly, so that the equipment utilization ratio and the working efficiency of the equipment are effectively improved, and the reliability of the equipment is improved.

The invention discloses a hanging basket for bridge construction. The hanging basket structurally comprises a mounting bracket, a fixed derrick, a construction basket, a main transmission rod, an auxiliary transmission rod, a protective barrier, a protective net, a driver, a fastening bolt, a fastening pin, a protective bottom plate, a lower guide wheel, a lower roller, an upper roller, an upper guide wheel, a driving gear, a driving roller, a positioning plate and a driving hand wheel. The hanging basket has the advantages that the driver realizes driving control of the driving roller by turning the driving hand wheel, so that the driving gear is engaged with a transmission tooth surface, the moving function of the construction basket is achieved, the whole operation process is convenientand rapid, construction area coverage is more effectively improved, and working efficiency is increased.

The invention discloses a melt-blown polypropylene material and its preparation method and application, which consist of the following components: 65-80 parts of melt-blown polypropylene, 20-35 parts of low-isotactic polypropylene, and 2-2 parts of stearate 3 copies. The invention blends low-isotactic polypropylene LMPP with melt-blown polypropylene, which can effectively improve the handle of the melt-blown non-woven fabric, and the prepared melt-blown non-woven fabric has a soft feel, and has the advantages of high strength and high toughness. , At the same time, it can improve the particle filtration efficiency and air permeability of melt-blown non-woven fabrics. This material has broad application prospects in the preparation of high-filtration, low-resistance female / child masks that require a perfect fit for the face.

The invention discloses a cardiovascular and cerebrovascular rehabilitation training instrument, and provides an instrument which not only can carry out comprehensive limb training on a patient, but also can massage the limbs of the patient and accelerate the rehabilitation speed, and in addition, can assist nursing personnel in nursing the patient and relieve the working intensity of the nursing personnel. The instrument comprises a U-shaped base and a position-adjustable massage device, a lifting-adjustable supporting frame is arranged on the U-shaped base, detachable seat plates are arranged on the left side and the right side of the supporting frame, a shear-type telescopic frame is arranged at the front end of the supporting frame, a foot supporting frame is arranged on the shear-type telescopic frame, the shear-type telescopic frame can be driven by a pull rod or a handle, a protective fence is hinged to the supporting frame, and an arm exercise mechanism is slidably connected on the protective fence. According to the cardiovascular and cerebrovascular rehabilitation training instrument, the structure is novel, the concept is ingenious, use is convenient, the working intensity of medical workers can be relieved to a great extent, and the working efficiency is improved; and the limb training function is more comprehensive, and the instrument can be matched with a massage device to accelerate rehabilitation of the patient.

The invention relates to the technical field of microwave reaction devices, and discloses a microwave plasma reactor, which comprises a multi-channel microwave transmission reaction body, a self-triggering ignition device and at least one layer of microwave source assembly, wherein a microwave resonant cavity is arranged in the multi-channel microwave transmission reaction body, each layer of microwave source assembly comprises a plurality of microwave transmission excitation sources, the plurality of microwave transmission excitation sources are distributed along the circumferential directionof the multi-channel microwave transmission reaction body, the frequency of the microwave transmission excitation source is equal to the resonant frequency of the working mode in the microwave resonant cavity, the self-triggering ignition device comprises a conical ignition structure arranged at the end of the multi-channel microwave transmission reaction body, the tip of the conical ignition structure faces the interior of the microwave resonant cavity, and an airflow channel is formed in the conical ignition structure and penetrates to the tip of the conical ignition structure. The microwave plasma reactor can effectively enhance the energy density of plasmas and increase the plasma area range in the microwave reactor, and is beneficial to expanding the application field of microwave plasmas.

The invention discloses a multifunctional internal bonding device for detecting rail buckles. Bonding pieces are embedded in grooves of a transverse plate by embedding walls; projections are formed on the wall surface of one end of the external; the structure can realize transitional fit between strip-shaped bodies on the embedding walls and the grooves; the strip-shaped bodies extend from the wall surface of one end of the internal to the wall surface of one end of the external; the two ends of the strip-shaped bodies are lower than the middles, and the top ends of the strip-shaped bodies are flat-wall-shaped or arched; the embedding walls are a top wall surface and a bottom wall surface; multiple strip-shaped bodies are arranged on the top wall surface and the bottom wall surface at equal intervals; the longitudinal spans of the strip-shaped bodies are 0.4-4 mm; the longitudinal spans of the projections are 4-15 mm; and rib plates are arranged on the inner surfaces of the bonding pieces. The device prevents the problems of larger liquid permeation gaps, weak closing effect and weak stability.

The invention discloses an anti-seepage internal gluing device for rail fastener detection. A bracket is in a cuboid frame structure; a cuboid frame is formed by connecting transverse plates and longitudinal plates from the top down; the transverse plates are connected with the longitudinal plates through gluing pieces; grooves are formed in the outer walls of the transverse plates and in the outer walls of the longitudinal plates; the gluing pieces are inserted into the grooves of the transverse plates via insertion walls; after the gluing pieces are fit with the surfaces of the transverse plates, the gluing pieces are limited in the grooves; gluing surfaces are used for laying an alpha-cyanoacrylate adhesive layer; the transverse plates are connected with the longitudinal plates through lead screws; the gluing surfaces contain wall surfaces inside and outside the ends of the gluing surfaces; bulges are formed on the wall surfaces outside the ends of the gluing surfaces; and ring-shaped wall surfaces containing an alpha-cyanoacrylate adhesive are arranged between the peripheries of the bulges and the outer walls of the gluing surfaces. The problems that a seepage gap is too large, and the sealing effect and the stability are not good are solved.

The invention provides a multifunctional arc axe which comprises an insulation rod and a working body. The working body comprises a middle center rod, an axe body arranged at one side of the center rod, and a brake pull rod working head and sawteeth which are arranged at the other side of the center rod. An installing cap is arranged at the bottom of the center rod, the installing cap is detachably installed at the top end of the insulation rod, the back face of the axe body is connected with the center rod, the front face, the top face and the bottom face of the axe body are each provided with an edge and sunken inwards to form an arc shape, the brake pull rod working head is transversely arranged, and the sawteeth are arranged below the brake pull rod working head. The multifunctional arc axe has the advantages of being scientific in design, convenient to operate, high in cleaning efficiency and high in safety.

The invention relates to a stereotactic radiotherapy system quality control detection motif and method. The motif part mainly comprises a multi-stage phantom connected by a phantom connection rod. A head mold groove is arranged on one end of the multi-stage phantom. The head mold groove is connected with one end of a head mold connection rod. The other end of the head mold connection rod is connected with a head mold. The head mold is provided with a head mold insertion plate groove. The multi-stage phantom is provided with an X-Y direction insertion plate groove, a Y-Z direction insertion plate groove and an ionization chamber insertion plate groove. According to the motif provided by the invention, a novel structure is designed, and each part of a human body can be accurately detected.

The invention discloses a tunny (shark) automatic angling machine, which consists of an angling floating platform, an angling device, a shark inducing device, a tunny inducing device, a control device, a floating box and a dynamo, wherein the angling device consists of an angling floating ball and an angling floating ball conveyer; the angling floating ball is arranged on the angling floating ball conveyer; the angling device, the shark inducing device, the tunny inducing device, the control device, the floating box and the dynamo are arranged on the angling floating platform; the tunny inducing device consists of a playing device which simulates assembling sound pressure of sardines to induce tunnies and a water injector which simulates assembling underwater sound of the sardines; and the shark inducing device is a device which adopts the blood smell emitted by blood plasma to induce sharks. The tunny (shark) automatic angling machine has the advantages that the fish inducing principle accords with life habits of the tunnies and the sharks; the tunnies (sharks) in remote distance, large scope and different water depths can be attracted and clustered; the area coverage of fish induction is greatly widened; and the catching rate is greatly improved.

The invention discloses a plasma treatment corn seed and a matching cultivation method. The method of the invention is suitable for use in an ecological zone with an altitude of 33°-40° and an altitude of 700-1300 meters. The method for plasma treatment of corn seeds of the present invention is to use the DL-2 plasma treatment machine produced by Dalian Boshi Plasma Co., Ltd., the treatment dose is 1.6-2.0A, and the treatment is performed twice, and the seed flow rate is 5.0-5.5kg / min, sow seeds within 6-12 days after treatment. The cultivation method of the present invention is as follows: (1) selecting a variety in a suitable growth period; (2) fertilizing rationally; (3) watering in a timely manner. Compared with the prior art, adopting the method of the present invention can increase the yield per unit area of ​​corn by more than 30%; it can save 90 yuan per mu for plastic film covering; it can widen the range of corn cultivation, improve the utilization rate of ecological resources, and achieve the same soil fertility and cultivation The land with management costs can increase the income by more than 700 yuan per mu compared with the cultivation of naked oats. The invention is a highly practical technique for increasing corn production.

The invention discloses a device capable of carrying out purification along with a production line. The device comprises a pipeline, a spraying assembly and a water pump, wherein the pipeline is arranged in correspondence to the production line and is provided with a cavity; the cavity comprises a sliding way and a water storage cavity, and the sliding way and the water storage cavity are communicated with each other along a longitudinal direction; the water storage cavity extends in the length direction of the pipeline; the spraying assembly comprises a spraying pipe and a spraying head whichare slidably mounted on the sliding way, one end of the spraying pipe is connected with the spraying head, and the other end of the spraying pipe is connected with the water storage cavity; the waterpump is arranged on the spraying pipe and used for pumping water in the water storage cavity to the spraying head for spraying when the spraying pipe is communicated with the water storage cavity. According to the invention, the pipeline is arranged in correspondence to the production line, and the spraying pipe is slidably connected with the sliding way, so the spraying assembly can move to anyposition on the production line for spraying operation, which is beneficial for broadening a spraying area, and thus, the water mist purification degree of each position is balanced, and water mist purification effect is optimized; and the spraying pipe can be connected and disconnected with the water storage cavity, so the device is flexibly adapted to running and stalling of the production line,and the practicability of the device is improved.

The invention provides a gas control method for self-relief, pressure-relieving and rapid excavation of adjacent empty roadways, and relates to the technical field of mine gas prevention and control. The invention accurately determines the pressure relief zone area adjacent to the coal body in the upper section of the mining working face, so as to ensure roadway excavation in the pressure relief zone area; at the same time, the gas outburst of the coal seam in the roadway is eliminated, the number of gas drainage holes is reduced, and the number of drilling holes is reduced. In the process of tunnel excavation, the area of ​​the pressure relief zone is further increased, and the gas drainage concentration of the gas drainage hole is further increased. Both the gas drainage and gas drainage volume have been improved to a certain extent, the gas drainage time has been reduced, and the gas pressure and content of the coal seam have been rapidly reduced. The channel reduces the influx of gas in the goaf and prevents the gas concentration in the return flow from exceeding the limit.