2468results about "Drainage" patented technology

The invention relates to a tunnel ponding early warning method and device, computer equipment and a storage medium. The method comprises the steps that at least two first flow detection units are arranged at an inlet and an outlet of a tunnel, at least one second flow detection unit is arranged at a water outlet of the tunnel, local water accumulation threshold values of a plurality of water accumulation sensitive areas are determined based on historical water accumulation data, and the local water accumulation threshold values are arranged according to the threshold values to obtain a threshold value distribution sequence; dividing the threshold distribution sequence into a first sequence and a second sequence based on a preset proportion, and determining a first global threshold by a local ponding threshold at the boundary of the first sequence and the second sequence; calculating the inlet and outlet flow difference according to the first flow data and the second flow data, and further determining the water accumulation amount; and adjusting a second global threshold value according to the ponding risk index, and starting a corresponding risk early warning strategy when the ponding amount exceeds the first global threshold value or the second global threshold value. Low-cost and high-precision tunnel ponding monitoring is realized based on simplified sensing data, and the safety of tunnel passage is improved.

Disclosed in the present invention are an underground gas storage device for compressed air energy storage and a construction method therefor. The underground gas storage device for compressed air energy storage comprises an underground gas storage cavern, the underground gas storage cavern being formed of a plurality of underground gas storage cavern sections, wherein a connecting tunnel is provided between two non-adjacent underground gas storage cavern sections, a vertical shaft is provided at the top end of the connecting tunnel, and a sealing plug is provided in the intersection between the vertical shaft and the connecting tunnel; a gas intake pipeline and a gas output pipeline are provided in the vertical shaft, and a sump is provided on an outer bottom wall of the connecting tunnel; a first drainage ditch is provided around the top face edge of the sealing plug in the vertical shaft, and the first drainage ditch is in communication with the sump; and a drainage blind pipe assembly is provided on the periphery of the underground gas storage cavern sections, and the drainage blind pipe assembly is in communication with the sump via a second drainage ditch arranged at the outer bottom wall of the connecting tunnel. The present invention can achieve one-time excavation forming, without transformation and with relatively low construction difficulty, and can effectively reduce the influence of underground water on the underground gas storage cavern during a construction period, operation period and maintenance period.

The invention relates to an advanced treatment method for an open-type TBM passing water-rich fault zone based on parallel pilot tunnels. The advanced treatment method comprises the following steps that S1, the parallel pilot tunnels are arranged, wherein S101, the positions of the pilot tunnels are determined; s102, hole type design is carried out; s103, adjusting a bottom slope; s2, lateral drilling and drainage pressure relief are carried out; S201, lateral drilling and drainage hole arrangement are carried out; s202, determining the structure of the drainage hole; s203, drainage treatment is carried out; s3, lateral grouting reinforcement is conducted; S301, grouting holes are distributed; s302, the grouting holes are segmented; s303, grouting implementation is carried out; and S304, carrying out test inspection. According to the advanced treatment method for the open-type TBM passing water-rich fault zone based on the parallel pilot tunnels, the standardization and feasibility of prevention of mud burst and water burst of the water-rich fault can be improved, the treatment efficiency is improved, the water plugging and consolidation effects of advanced grouting are enhanced, the risk of occurrence of a sudden burst disaster is effectively reduced, and considerable economic benefits are achieved.

Disclosed in the present invention is a method for draining water of coal mine goafs by crossing an adjacent goaf. An applicable environment of the method comprises a first goaf, a second goaf and a third goaf which are successively arranged on a side of a tunnel, directional drilling mechanisms being provided between the tunnel and the second goaf and between the tunnel and the third goaf, and the directional drilling mechanisms penetrating through a coal seam floor located at the bottom of the goafs so as to communicate with the second goaf and the third goaf. Directional holes comprise a first directional hole and a second directional hole, the first directional hole leading to the second goaf, the second directional hole leading to the third goaf, and a sleeve structure being mounted in the first directional hole. The present invention uses directional drilling, and the directional holes penetrate into and out of the coal seam floor, so as to cross the adjacent goaf, thus increasing the range of explored and drained goafs and the hole length so as to drain in advance water accumulated in the remaining goafs that cannot be drained in a traditional coal mine drilling mode. The present invention can be popularized and used in the field of coal mines to solve the present threat of goaf water to coal mine production.

The invention discloses tunnel deeply-buried ditch construction equipment and method.The method comprises the following steps that S1, a self-propelled inverted arch trestle is moved to a construction section, a total station is adopted for lofting an excavation sideline of a deeply-buried ditch, and the sideline is marked; s2, driving tunneling equipment into an operation area, adjusting the center line of the tunneling equipment to be aligned with the designed center line of the ditch, meanwhile, lifting a slag removal conveying belt of a bridge approach machine to a specified height, enabling a transport vehicle to be in place, and enabling the equipment to run in a no-load manner; s3, a tunneling system of the tunneling equipment is started, and the tunneling equipment is driven by the control system to conduct tunneling operation according to a preset track; s4, muck in the muck collecting system is conveyed to a transport vehicle through a conveying belt to be transported outwards; and S5, after the ditch is excavated, a base is formed at the bottom, and meanwhile a temporary protection wall is installed. According to the device, the randomness of manual operation is avoided through mechanical operation, process control is more convenient, meanwhile, procedure connection gaps are reduced through continuous construction, and the problem that the exposure time of the inverted arch is too long is effectively solved.

The invention provides a mine water prevention and control risk early warning method and system based on earthquake and geology fusion, and belongs to the field of soil layer or rock drilling, the method comprises the steps that real-time earthquake data of an earthquake monitoring module and geological exploration data of a geological exploration module are received, and the geological exploration module comprises a drilling detection module and a hydrogeological analysis module; based on the real-time seismic data, the geological exploration data and a preset water prevention and control risk early warning model, obtaining a risk level including a risk level and a corresponding water prevention and control execution measure; triggering target execution equipment such as drilling equipment to perform prevention and treatment according to execution measures; drilling a monitoring hole and arranging an optical fiber osmometer to collect osmotic pressure data at a first risk grade; at the second risk level, grouting plugging is conducted on the crack drilling grouting holes; constructing a water guide hole in the aquifer at the third risk level, and guiding underground water to a safe area through a drainage pump group. According to the method, multi-source data are fused to realize graded accurate early warning and prevention.

The invention discloses a mountain tunnel waterproof and drainage structure convenient to maintain and replace and a construction method.The waterproof and drainage structure comprises a primary support, a secondary lining, detachable water guiding and drainage structures and a tunnel bottom drainage structure, an annular groove is reserved in a secondary lining construction joint, and the water guiding and drainage structures are intensively arranged; the water guiding and draining structure comprises a water draining pipe, an annular water draining groove, a water-wave-proof steel pattern plate, a heat preservation material and a decorative plate which are sequentially arranged from outside to inside. The bottom drainage structure comprises transverse drainage ditches and a central drainage ditch. According to the tunnel waterproof and drainage structure, the underground water behind the tunnel lining is basically drained through the capacity of the water drainage pipe for actively reducing the underground water, the underground water is prevented from acting on the supporting structure, permeation of the underground water into the supporting structure is reduced, the construction method is simple and convenient, and the construction quality is easy to control; during tunnel operation and maintenance, desilting, maintenance and replacement are facilitated, and the durability of the tunnel is improved.

The invention belongs to the technical field of geothermal energy development and utilization, and particularly relates to a separated ultra-deep geothermal water extraction and utilization device which comprises a base, an adjustable supporting mechanism is arranged on the base, a winch is arranged on the adjustable supporting mechanism, a sliding rod piece is arranged in a closed mine, and the winch is used for conveying the sliding rod piece to the bottom of the closed mine. A clamping mechanism used for fixing the sliding rod piece is arranged on one side of the base. The sliding rod piece is vertically arranged, a plurality of supporting plate assemblies are connected to the sliding rod piece in a sliding mode, the other ends of the supporting plate assemblies are fixedly connected to a rope on the winch, a water pumping device is arranged on the lowest supporting plate assembly, transfer water pumping devices are arranged on the rest supporting plate assemblies, and the water pumping device is communicated with the transfer water pumping devices. The device is high in reliability, can be repeatedly used, is low in cost input, and can solve the problem that hot water is difficult to extract when a mine is closed in an ultra-deep manner.

The invention discloses an underground chamber structure of a compressed air energy storage power station, a construction method and a parameter optimization design method, and belongs to the field of compressed air energy storage and underground space engineering. A hard rock stratum building chamber is determined through systematic site selection investigation, a high-performance concrete lining (containing fiber reinforcement) and a polyurethane buffer layer are adopted to synergistically improve the stability, and a vinyl ester resin-based glass fiber reinforced plastic three-layer composite structure serves as a sealing layer (including a bonding layer, a reinforcement layer and an impermeable layer); the processes of sand blasting pretreatment, stepped joint and the like are combined to guarantee the sealing performance; meanwhile, on the basis of a finite element model, structural parameters are optimized by taking the lowest whole life cycle cost as a target and taking strength, deformation, leakage rate and the like as constraints, and a recommended parameter combination of each structural layer is obtained in combination with an orthogonal experimental design and an improved genetic algorithm. The method is suitable for various geological conditions, the safety, economical efficiency and adaptability of the compressed air energy storage power station are effectively improved, and the method is suitable for large-scale application and popularization.

The invention belongs to the technical field of tunnel engineering and hydrogeological engineering, and particularly relates to a tunnel underground water pressure-limiting discharge management system and method based on data driving. A tunnel underground water pressure-limiting discharge management system based on data driving comprises a monitoring module, a processing module, a control module and an execution module. The monitoring module is used for collecting contact pressure, water pressure, steel bar stress, steel arch internal force, lining displacement, steel bar strain, underground water level and water turbidity as multi-source monitoring data; the contact pressure comprises the contact pressure between the primary support and the secondary lining and the contact pressure between the primary support and the surrounding rock. And the processing module is used for dynamically adjusting the weight coefficient of each monitoring index through an adaptive particle swarm optimization algorithm according to the multi-source information, and calculating a comprehensive early warning index # imgabs0 #. According to the scheme, through multi-source data real-time monitoring and self-adaptive algorithm dynamic adjustment, accurate drainage early warning is achieved, the structural risk is reduced, and safety and reliability are improved.

The invention discloses a large-section tunnel excavation supporting system crossing a fault fracture zone, which comprises a plurality of self-propelled advanced large pipe sheds arranged on a tunnel vault before excavation and a plurality of advanced small pipes arranged on a tunnel side wall, after excavation of each layer is completed, steel-like fiber concrete is preliminarily sprayed on the top arch and the side wall of the corresponding excavation face, system anchor rods are constructed, then multiple steel supports are arranged on the top arch and the side wall of the corresponding excavation face in the longitudinal direction of the tunnel, and a plurality of cover-weight-free consolidation grouting holes are evenly formed in the top arch and the side wall of the whole section for grouting; and then a plurality of system anchor rods and drainage systems are evenly arranged on the top arch and the side wall of the excavation face, then reinforcing meshes are arranged between the steel supports, and then secondary injection of imitated steel fiber concrete is conducted. The problems that in the prior art, when a tunnel crosses a fault fracture zone, roof fall and collapse accidents are prone to occurring through common excavation supporting measures, and the construction safety and the project progress are seriously affected are solved.

The invention relates to the technical field of tunnel engineering construction, in particular to a high and cold tunnel variable cross-section frozen soil thermal coupling safety hierarchical control construction method, which comprises the following steps: constructing a three-dimensional thermal coupling model considering frozen soil phase change characteristics based on an FLAC3d platform, and introducing a freezing frontal surface expansion speed prediction algorithm and ground temperature monitoring data to dynamically correct model parameters; a three-level safety threshold is established, a hierarchical control strategy is implemented, a pre-control period (heating and heat preservation), an excavation period (advanced small pilot tunnel and reverse top-picking expanding excavation) and a support period (asymmetric support) are divided, and a closed-loop system for monitoring, simulation, feedback and adjustment is established. The method comprises the following steps of: accurately regulating and controlling a temperature field, setting a phase change energy storage heat preservation layer, constructing a bionic drainage system, applying an intelligent construction platform with BIM (Building Information Modeling) and GIS (Geographic Information System) fused, integrating various sensing equipment for real-time monitoring, comparing monitoring data with a model prediction result, dynamically optimizing construction parameters and ensuring construction safety.

The invention discloses a telescopic grouting pipe-bag-electrode system and a using method, and belongs to the technical field of underground geotechnical engineering and tunnel engineering. The system comprises a grouting pipe, the grouting pipe is in a hollow cylinder shape and comprises a grouting pipe tail section, a grouting pipe middle section and a grouting pipe top section which are fixedly connected in sequence, and a grouting hole is formed in the grouting pipe middle section; the sliding mechanism is arranged on the tail section of the grouting pipe in a sleeving mode and can slide in the axis direction of the tail section of the grouting pipe; the grouting pipe is sleeved with the silicone rubber bag, one end of the silicone rubber bag is fixed to the top section of the grouting pipe, and the other end of the silicone rubber bag is fixed to the sliding mechanism to drive the silicone rubber bag to stretch out and draw back through the sliding mechanism; and the carbon fiber cloth electrode is attached to the outer side surface of the silicon rubber bag. According to the method, the bag expansion-electroosmosis method technology is combined, the reinforcing effect of the soft soil layer is improved, and foundation settlement is effectively controlled; and a sliding mechanism is further arranged, so that the installation problem caused by the fact that the diameter of a reserved grouting hole of the tunnel segment is small in the original reinforcement technology is solved.

The invention relates to the technical field of coal mine drainage filtering devices, in particular to a drainage filtering device with a self-cleaning function, which comprises a shell, a first filter cartridge, a second filter cartridge, an annular plate and a third filter cartridge, the shell is fixedly arranged, a first cavity and a second cavity are arranged in the shell, the first filter cartridge is fixedly arranged in the shell, and the second filter cartridge is fixedly arranged in the shell; the second cavity is communicated with the first cavity through the first filter cylinder, one end of the second filter cylinder is arranged in the first filter cylinder in a sliding mode, the annular plate is fixedly installed at the end, away from the first filter cylinder, of the second filter cylinder, the annular plate is located in the first cavity, the third filter cylinder is arranged in the second filter cylinder, and one end of the third filter cylinder is fixedly connected with the annular plate. Through cooperative arrangement of the second filter cartridge and the annular plate, water in the first cavity can enter the third filter cartridge through the annular plate, and impurities in the first cavity can flow into the third filter cartridge through the annular plate, so that the blocking degree of the second filter cartridge is reduced, and the water filtering amount of the first filter cartridge and the second filter cartridge is increased.

The invention relates to a nanoscale grouting method for illite-smectite mixed layer surrounding rock, which is characterized by comprising the following steps of: S1, combined detection of a borehole television and a ground penetrating radar or a geological radar: carrying out rock mass structure detection in a manner of combining the borehole television and the ground penetrating radar or the geological radar, and obtaining a deformation rule of a roadway and surrounding rock in an area; s2, arranging grouting pipes and an exhaust pipe: arranging two long and short grouting pipes and one exhaust pipe in the grouting hole according to the deformation rule of the roadway and the surrounding rock in combination with numerical simulation of rock mass mechanics and the result of the numerical simulation; s3, grouting is conducted, specifically, grouting is conducted in a deep and shallow hole matching grouting mode; s4, secondary splitting grouting reinforcement is conducted, specifically, the mine illite-smectite mixed layer surrounding rock is reinforced through a secondary splitting grouting technology, the unfilled part in the primary grouting process is made up, and it is ensured that all gaps are filled with grout; and the illite smectite mixed layer surrounding rock can be grouted well.

The invention discloses a method for preventing and controlling floor water inrush in the technical field of mine water disaster prevention and control, which comprises the following steps of: 1, analyzing mine conditions: knowing geological conditions of a water-resisting layer and a water-bearing layer, and determining underground water conditions; 2, regional evaluation: probing the water yield property of the aquifer, and dividing the working face into an abnormal region and a dangerous region; 3, drilling is carried out, wherein hole verification area division is carried out, the water quality type is determined, and the water pressure is measured; 4, drainage and pressure reduction, wherein drainage is conducted in the main hole according to the water inrush coefficient, and meanwhile water pressure and water pumping amount fluctuation are monitored in the whole process; 5, observation holes are formed and monitored, specifically, a plurality of observation holes are additionally formed in one side of the main hole, and water level changes are monitored; sixthly, grouting reinforcement is conducted, specifically, grouting reinforcement is conducted at the main hole, and meanwhile the water pumping power is lowered; and 7, reinforcing result verification: evaluating the reinforcing effect. The method is easy to operate, and the ideal bottom plate reinforcing effect is achieved by conducting drainage pressure reduction and grouting reinforcement at the same time and arranging the observation holes.

Disclosed in the present invention is a water filling and drainage test device and method for a prefabricated crack-containing reinforced concrete lining pressure tunnel. The test device comprises a cylindrical barrel, a reinforced concrete lining containing prefabricated cracks, surrounding rock, geotechnical cloth, a front flange, a rear flange, and a monitoring instrument. The surrounding rock is proximate to an inner wall of the cylindrical barrel, and the reinforced concrete lining containing the prefabricated cracks is inside of the surrounding rock; and the front flange and the rear flange are fixed at two ends of the cylindrical barrel. The test device is used for carrying out a water filling and drainage test on the pressure tunnel, and observing the change in the width of the prefabricated cracks and the conditions of the pressure tunnel.

The utility model discloses a drilling blowout preventer for coal mine water exploration and drainage, and relates to the technical field of coal mine water exploration and drainage. The device comprises a shell, a blowout prevention assembly is arranged at the bottom of the shell, a lifting seat is arranged in the shell, a motor is fixedly connected to the top of the lifting seat, the blowout prevention assembly comprises a protective cover, a sliding hole is formed in the center axis of the top of the protective cover, and a rotating rod is connected to the inner wall of the sliding hole in a sliding mode. The blowout prevention assembly is arranged, specifically, sprayed water flow can make contact with the first buffering ring and the second buffering ring, the two-time buffering effect is achieved, at the moment, the water flow flows in an S-shaped mode, along with continuous rising of the water flow, the water flow flows to the position above the intercepting ring through the intercepting ring, and at the moment, the impact force of the water flow is greatly weakened; and the water flow on the intercepting ring flows out through the water outlet, so that the spraying condition is avoided, and the damage to surrounding equipment and workers caused by the impact of the water flow is avoided.

The invention provides a construction method for comprehensive treatment of seepage water of a deformation joint of a subway tunnel. The construction method comprises the steps of pretreatment of a seepage part, grouting and plugging of an inclined hole, reconstruction of a waterproof layer, brushing of waterproof paint, laying of a waterproof roll, installation of a rubber waterstop, reinforcement of embedded steel bars, construction of a waterproof coating film, installation of a drainage box system, recovery of decoration equipment and the like. The method comprises the steps of mechanical cutting, high-pressure cleaning pretreatment, double-liquid alternate grouting plugging, three-layer gradient waterproof layer reconstruction, high-elasticity waterproof coating brushing, self-adhesion type polymer coiled material laying, telescopic rubber waterstop installation, diamond thin-wall drill bar planting reinforcement, multi-layer waterproof coating construction and integration of a stainless steel drainage box system. And a treatment scheme with strong systematicness and excellent waterproof performance is formed. Compared with a traditional method, gradient construction and long-term effectiveness of the waterproof layer are emphasized, the flexibility and sealing performance of the waterproof structure are enhanced, deformation is effectively dealt with, the structure is reinforced, it is ensured that leaked water is effectively discharged, and the service life of the subway tunnel is prolonged.

The invention discloses a rock hydraulics-based high-position separation water monitoring and drainage control method, which comprises the following steps of: determining a separation water development position according to an early-stage exploration result; a monitoring drill hole and a drainage drill hole which are communicated with the separation water are constructed on the ground surface above the development position of the separation water; a water pressure sensor is arranged at the bottom in the monitoring drill hole; a water suction pump is arranged in the drainage drill hole; a plurality of micro-seismic sensors are arranged in a roof rock stratum of the working face at set intervals, and the development height of the water flowing fractured zone is determined according to micro-seismic signals collected by the micro-seismic sensors; determining the thickness of a separation layer water-resisting layer according to the development height of the water flowing fractured zone; determining an abscission water warning water head according to the thickness of the abscission water water-resisting layer; determining a warning water level according to the separation water warning water head and the separation water bottom plate elevation obtained through early-stage exploration, and setting the determined separation water warning water level as an early warning water level; the water level data in the monitoring drill hole are collected in real time, the real-time water level is obtained, when the real-time water head exceeds the early warning water level, the water suction pump is started to pump separation water, and separation water level control is achieved.

The invention discloses an intelligent integrated automatic pollution discharge, spray and dust suppression system for a coal mine tunnel, and relates to the technical field of automation. The system comprises a double-channel sensing assembly, a central controller, a mine communication link and an integrated pollution discharge spraying terminal group, the central controller obtains a dust image and a ground height image at the same time in combination with the double-channel sensing assembly, generates a roadway working condition grid map, completes dust level marking and ground height marking, extracts a dust cluster and a transition zone on the basis, and loads a pollution discharge component list. Constructing a descending chain from the outer edge of the dust cluster, selecting a ridge chain backbone, finally generating a cooperative control instruction set, issuing the cooperative control instruction set to the integrated pollution discharge spraying terminal group, and carrying out snapshot acceptance check by using a dual-channel sensing assembly after execution. According to the invention, accurate dust control, smooth sewage discharge and high resource utilization rate can be ensured, and the stability and long-term effectiveness of system operation can be maintained in a complex environment.

The invention discloses a tunnel base soil body active drainage system device and method based on drainage nails, and relates to the technical field of tunnel construction. The device comprises capillary adsorption tube wells, side ditches and a pumping drainage device, the capillary adsorption tube wells are arranged on the two sides of the bottom of a tunnel, and the multiple capillary adsorption tube wells are arranged in the longitudinal direction of the tunnel; each capillary adsorption tube well is arranged in the vertical direction and extends into a base soil body below a tunnel bottom, each capillary adsorption tube well comprises a waterproof tube section, a water seepage tube section and a bottom precipitation tube section which are sequentially arranged, and every two adjacent tube sections are connected through a plugging connector. The side ditches are arranged on the two sides of the railway ballast and used for gathering and discharging water in the capillary adsorption tube wells. And the pumping and draining device is used for pumping and draining water in the capillary adsorption tube well into the side ditch. A natural filter layer can be formed under the capillary action of the water seepage pipe section, silt is effectively prevented from inrush, and therefore the method is suitable for long-term water pumping and drainage construction in the heavy haul railway base operation period, and frequent pipe well cleaning does not need to be carried out.

The invention relates to the technical field of tunnel drainage, and specifically discloses a directional accelerated crystallization device for a tunnel drainage system and a method for using the device. The device comprises a crystallization pool component, a felt layer and a medicine box component, wherein the crystallization pool component comprises a crystallization pool, and a pool cover is arranged on the top of the crystallization pool; the crystallization pool comprises a front wall, a rear wall, an outer wall and an inner wall; the medicine box component comprises a medicine storage box, and a horizontal mesh medicine box is arranged at the bottom of the medicine storage box, and the mesh medicine box is a double-layer hollow mesh structure, and the bottom of the medicine storage box is connected to the mesh medicine box, and reactive drugs are placed in the mesh medicine box; the invention takes into account the influence of temperature, flow rate, chemical drugs, crystallization pool shape and surface morphology on the crystallization of tunnel water, and can realize the idea of ​​directional crystallization of the tunnel drainage system, and at the same time has the advantages of simple structure, easy medicine replenishment, cleaning, repair and maintenance, and can be applied to tunnels that have been put into operation, and can also be applied to tunnels in the design stage.

The invention discloses a method for rapidly and efficiently extracting coal mine gas in a broken and soft coal seam, and belongs to the technical field of coal seam gas development and coal mine gas prevention and control. According to the method, geological features of a coal mining planning area are determined, a ground U-shaped well and underground bottom-pumped rock drift layer-crossing drilling combined treatment system is deployed, and regional large-scale treatment is achieved in a well factory mode; the fracturing transformation range and the fracturing fluid distribution characteristics are detected by using a ground and underground combined micro-seismic monitoring and underground transient electromagnetic method, and the arrangement of layer-crossing drill holes is optimized; dividing the cross-layer drill holes into drainage holes and air exhaust holes, and formulating a collaborative extraction system in combination with different drainage and extraction stages; the method solves the problems that broken soft coal seam gas extraction is low in efficiency and long in period, and treatment blind areas exist, treatment time is remarkably shortened, cost is reduced, and safe and efficient production of a coal mine is guaranteed.

Disclose is a separator for separating liquid from a fluid stream including a mixture of gas and liquid. The separator comprises a first vessel including an outlet and an inlet for receiving the fluid stream, the first vessel in fluid communication with a second vessel via a first valve, the second vessel in fluid communication with a liquid outlet via a second valve, wherein the first vessel is arranged to enable the liquid to flow into the second vessel. The separator also has a second valve for controlling release of liquid from the second vessel, the first and second valves being pneumatically operated, the pneumatic operation of the first and second valves allowing only one of the first and second valves to be open during operation of the separator.

The invention relates to a cold region tunnel energy-saving heat-preservation anti-freezing system and a control method, the cold region tunnel energy-saving heat-preservation anti-freezing system comprises an energy storage heating module, a temperature monitoring module, an air circulation module, a drainage anti-freezing module, a lining and an off-wall heat-preservation layer, the lining and the off-wall heat-preservation layer form an air heat-preservation cavity, and the air heat-preservation cavity communicates with the energy storage heating module; the energy storage heating module is used for generating and storing heat and providing a heat source for air in the air heat preservation cavity and the air circulation module, and the temperature monitoring module is used for collecting and analyzing the temperature of air in the air heat preservation cavity and the temperature of air in the air circulation module and the inner wall of the air heat preservation cavity. According to the embodiment of the invention, a stable heat preservation and anti-freezing effect can be provided in a negative temperature environment for a long time, the operation cost is low, safety and reliability are realized, the problems of high energy consumption, potential safety hazards and the like in the prior art are solved, the applicability is wide, and the practicability is high. And the method has good practical value and economic benefit.

The invention provides a full space-time joint prevention and control method for repeated mining water inrush risk of a deep close-distance coal seam group. The method comprises the steps that a working face roadway arrangement scheme is optimized through physical simulation and numerical simulation before stoping, an open-off cut and inclination double-internal-error arrangement mode is formed, and floor roadway arrangement is conducted; the thickness of a water-resisting layer is increased through area treatment before stoping, so that the water inrush coefficient is reduced; monitoring time, space and intensity information of a micro-seismic event in the area during recovery, and determining a micro-seismic monitoring early warning level; and observing a mine pressure value and hydrological information during stoping, paying attention to changes of the mine pressure value and the hydrological information, and performing pushing and mining speed control and fixed-point dynamic water drainage and pressure reduction in combination with a micro-seismic monitoring early warning level and a deep event dense area so as to reduce a water inrush coefficient of a working face. Through combined control of three methods of mine pressure, water pressure and micro-seismic monitoring and early warning, the water inrush risk can be reduced and safe mining of the working face can be guaranteed through the whole time period before mining and during mining.

The invention discloses an underground large-water mine fine ore recovery technology, and relates to the technical field of fine ore recovery. The method comprises the steps that S1, underground equipment is prepared and arranged; s2, collecting fine ore in the stope; s3, ore screening and material preparation; s4, determining the diameter of the pipeline; s5, calculating the pressure loss of the pipeline; s6, stirring and modifying the ore pulp; and S7, ore screening and wastewater recycling. The process belongs to active recovery of the fine ore, all the fine ore produced in the mine can be recovered, the intermediate transportation and crushing steps of the recovered fine ore are omitted, and the problem that the ore slurry formed after the fine ore meets water blocks a draw shaft and a drainage channel is solved. And the fine ore is directly recovered and passes through the crushing stage, so that the loss of the fine ore in the transportation process is effectively reduced, and the resource recovery rate is greatly improved. Compared with the prior art, fine ore can be actively recycled, and the recycling efficiency is high. Equipment used in the process is more flexible, and there is no need to excavate more laneway projects for treating the fine ore.

The present invention relates to the technical field of coal mining, in particular to a method for constructing an artificial water guide channel through drainage boreholes in a roof aquifer by means of pulse fracturing. The method involves arranging drainage boreholes and using pulse fracturing to pre-form an artificial water guide channel in a sandstone fracture aquifer through the arranged drainage boreholes, thereby improving the permeability of dense and intact sandstone rock masses; the artificial water guide channel formed by the drainage boreholes in the sandstone fracture aquifer connects discontinuous water-bearing areas and water-rich areas, such that roof sandstone fracture water‌ is guided to the drainage boreholes through the artificial water guide channel, thereby achieving effective drainage of the boreholes and expanding the drainage radiation range of a single borehole. The present invention not only avoids arranging excessive drainage boreholes and remarkably improves the drainage efficiency of exploratory drainage holes, but also achieves an advanced drainage function in a stoping process. By means of the method, mine water disasters can be effectively controlled even under unfordable geological conditions, thereby guaranteeing safe production at mines.

The invention relates to the field of emergency drainage of high-speed rail tunnels, in particular to a pumping drainage method for gushing water of a high-speed rail tunnel, which comprises the following steps of: reasonably arranging a drainage pump truck, a first drainage pump group and a second drainage pump group, so that the drainage pump truck, the first drainage pump group and the second drainage pump group are used for pumping water in a relay manner; gushing water in the high-speed rail tunnel can be rapidly pumped and drained, and the pumping and draining efficiency of the gushing water in the high-speed rail tunnel is improved; the drainage function of the high-speed rail tunnel pump station in the high-speed rail tunnel can be quickly recovered, and high-speed rail tunnel construction can be quickly recovered; according to the pumping drainage method, the drainage process of gushing water of the high-speed rail tunnel is optimized, and the safety of drainage operation of the high-speed rail tunnel is guaranteed.