38 results about "Salt mine" patented technology

The application discloses a kind of high-salt mine water processing device and processing method, belong to high-salt mine water processing technical field, to solve at least one of the problems, such as huge energy, infrastructure complexity, unable batch processing wastewater in prior art high-salt mine water processing.The application, processing device, including anode flow electrode tank, cathode flow electrode tank, high-salt mine water tank, clean water tank and flow electrode capacitive deionization component;Flow electrode capacitive deionization component includes anode side current collector plate, cation exchange membrane, processing liquid cavity plate, anion exchange membrane and cathode side current collector plate in turn, anode flow electrode tank and anode side current collector plate are communicated to constitute anode flow electrode circulation loop, cathode flow electrode tank and cathode side current collector plate are communicated to constitute cathode flow electrode circulation loop, high-salt mine water tank, processing liquid cavity plate and clean water tank are communicated in turn to constitute high-salt mine water and clean water circulation loop.The application can be used for the processing of high-salt mine water.

The invention discloses a dust falling method and system for underground stoping of a solid potassium salt mine, and belongs to the field of mine dust prevention and control. According to the method, the dissolving characteristic of the sylvite ore is creatively utilized, a sylvite saturated viscous solution is used as a dust fall medium, dust is inhibited in the whole process through a three-stage cooperative system of pre-wetting, wrapping spraying and air flow purification, a medium cyclic regeneration system is established, and zero discharge of dust fall wastewater and sylvite resource recovery are achieved. The system comprises a PSVS preparation and adjustment subsystem, a three-stage dust fall execution subsystem, a perception and control subsystem and a resource recycling subsystem, and an intelligent decision center of the system executes a cooperative control algorithm based on dust distribution prediction to realize prospective precise dust fall. The method fundamentally solves the problems of low efficiency, resource waste and environmental pollution of traditional clean water dust falling and potassium salt mine dust dissolution, and has the comprehensive benefits of high efficiency, safety, environmental protection and recycling.

The application discloses a construction method for rapid excavation of a potassium salt mine, and comprises the following steps: excavation branch roadway planning, excavation preparation of a first area, excavation of the first area, excavation preparation of a second area, excavation of the second area, excavation preparation of a third area, excavation of the third area, and after the completion of the excavation operation, repeating the above steps to move to the next excavation face for excavation. The application solves the problems of discontinuous post-excavation transportation, difficult and long period of moving and inverting the face, realizes rapid excavation of the roadway, rapid transportation of materials and rapid moving of equipment, and improves the excavation efficiency of the whole mining area.

The invention relates to a potassium salt mine hydraulic support and a production process method thereof, and the production method comprises the following steps: S1, cutting and blanking steel, and carrying out groove processing to obtain a base body structural part and structural accessories; s2, the base body structural part is assembled and welded to obtain a structural prototype; s3, the structure accessories are installed in sequence, and a semi-finished product is obtained; and S4, the semi-finished product is subjected to thermal aging treatment, overall machining and surface anti-corrosion treatment, and a structural part is obtained and further assembled to form the hydraulic support. And in the steps S2-S3, after welding is completed, laser micro-textured surface treatment and surface passivation treatment are conducted on a weld joint area, and then a formed micro-textured structure is filled with corrosion inhibition coating. The technical problems that in an existing production technology, structural internal stress and deformation control of a hydraulic support are insufficient, and weak areas such as welding seams are prone to early corrosion, so that the bearing capacity of the hydraulic support is reduced rapidly in high-chlorine, high-humidity and high-ground-pressure environments such as sylvite ores, and the overall service life is short can be solved.

The application relates to a method for discharging brine by using salt mine old cavity residues, which comprises the following steps: S1, performing a sonar cavity measurement operation on the salt mine old cavity to obtain the shape of the salt mine old cavity; S2, determining the salt cavity boundary of the salt mine old cavity according to the obtained shape of the salt mine old cavity, and taking the position, which is horizontally away from the outermost end of the salt cavity boundary by a first preset distance, as the wellhead position of the brine discharge well; drilling the brine discharge well guide hole at the wellhead position of the brine discharge well, and the drilling depth satisfies at least a second preset distance below the insoluble residue in the salt mine old cavity; S3, after the brine discharge well guide hole is completely drilled, the distance between the brine discharge well guide hole and the outermost end of the salt cavity boundary is determined; S4, the distance between the brine discharge well guide hole and the outermost end of the salt cavity boundary is used to determine the build-up point position in the brine discharge well guide hole; S5, the guide hole section below the build-up point position is blocked to form a guide hole blocking section; and S6, starting the construction at the build-up point position to make the brine discharge well guide hole communicate with the insoluble residue in the salt mine old cavity.

The application discloses a design, construction and operation parameter optimization method of a high-impurity salt mine hydrogen storage library. Through early drilling and coring and testing, the influence of mineral composition and microorganisms in the salt layer on hydrogen purity is accurately evaluated, so that suitable salt-containing strata that can be used for hydrogen storage are screened out before construction, and the shape of the salt cavity is detected and the sealing property of the salt cavity is tested; in combination with sediment connectivity and porosity test data, the hydrogen storage capacity of the cavity is evaluated; the depth of the hydrogen-halogen water interface in the cavity is controlled to ensure the formal operation of the hydrogen storage cavity, and the hydrogen storage efficiency can be improved in combination with the production mode of hydrogen without a cushion bottom; thus, a hydrogen storage library meeting the hydrogen storage requirements is constructed in the high-impurity salt mine, and efficient utilization of the poor salt mine is realized.

This invention discloses a method for calculating the ion-locking capacity of coal-based backfill materials mixed with concentrated saline mine water, belonging to the field of coal mine underground treatment technology. Test specimens are prepared by mixing coal-based solid waste backfill materials with concentrated saline mine water from a secondary reverse osmosis system, and control specimens are prepared by mixing them with deionized water. Long-term immersion ion leaching tests are conducted on both test and control specimens. During the long-term immersion ion leaching test, multiple sampling times are set to collect the leachate and test the concentration of characteristic ions, without replenishing deionized water after each collection. Based on the characteristic ion concentrations of the leachate from the test and control specimens and the initial ion concentration of the concentrated saline mine water from the secondary reverse osmosis system, the ion-locking rate of the coal-based backfill material is calculated. The method is simple and convenient to use, providing a theoretical basis and technical support for the resource utilization of concentrated saline mine water and solid waste.

The application provides a double cutter disc angle adjustable structure, method and full-face tunneling machine suitable for potash salt mine, and relates to the technical field of full-face mechanized mining equipment for solid potash salt mine and other sedimentary layered deposits. The structure comprises two cutter disc assemblies arranged symmetrically left and right, wherein the output end of a main cutting gear box is rigidly connected with the cutter disc; a driving assembly is arranged on the frame of the full-face tunneling machine and is connected with the main cutting gear box; the two ends of an angle adjusting mechanism are respectively connected with the frame and the side wall of the main cutting gear box, and are used for driving the main cutting gear box to rotate around the vertical central axis thereof relative to the frame, so that the cutter disc is inclined outward relative to the tunneling direction in the horizontal plane; and the structure further comprises a controller which is respectively connected in communication with the driving assembly and the angle adjusting mechanism. The double cutter disc is inclined to form a certain outward inclination angle, the active cutting of the ground stress chain and the stress dimension reduction are realized, the rock breaking specific energy is reduced, and the cutting efficiency is improved.

The invention relates to the technical field of salt mine layer drilling sampling and data transmission, in particular to a complex terrain salt mine layer drilling directional sampling and data transmission device which comprises a ground monitoring and power supply system, a drill string transmission system, a directional sampling execution end system and a data link feedback system. The directional sampling execution end system is integrated at the tail end of the drill string transmission system through a long taper pipe thread structure, and the data link feedback system is arranged in the directional sampling execution end system and at a key node of the drill string transmission system in a distributed mode. And the data link feedback system establishes a two-way communication link with the ground monitoring and power supply system through a wired and wireless coupled composite transmission mode, so that accurate positioning sampling and parameter monitoring of a salt mine layer in a complex environment are conveniently and efficiently realized, and the exploration efficiency function is improved.

The application discloses a passive depth measuring device, which comprises a supporting assembly and a depth measuring assembly. When depth measurement is needed, the depth measuring rod in the depth measuring assembly is released, the depth measuring rod rotates around the supporting assembly, the free end of the depth measuring rod enters into the salt mine brine and contacts the bottom of the salt pond. Since the length of the depth measuring rod is relatively long, the depth measuring rod is in an inclined state. An angle sensor can monitor the rotating angle of the depth measuring rod, and the depth of the salt layer can be obtained after calculation. When the water mining machine sails, the free end of the depth measuring rod contacts the bottom of the salt pond. When the convex and concave parts on the bottom of the salt pond are encountered, the depth measuring rod can be released after relatively large elastic deformation and restore the original shape. The rotating angle of the depth measuring rod is monitored by using the angle sensor, the depth of the salt layer can be monitored in real time, the problem that the non-contact sensor cannot measure due to the fact that there are many suspended matters in the salt lake and the surface is easy to be salted is solved, and the working reliability of the depth measuring device is improved.

The invention discloses a method for recovering metal lead from nickel soot, and belongs to the technical field of hydrometallurgy. According to the method, a chlorine salt ore pulp electrolysis system is adopted, leaching and electro-deposition of lead are synchronously achieved in a diaphragm electrolytic cell, and metal lead is directly obtained from a cathode. The method comprises the following specific steps: washing, drying and grinding a nickel soot raw material, and then adding the nickel soot raw material into an electrolytic cell anode chamber separated by an acid and alkali resistant filter cloth diaphragm; the anode chamber and the cathode chamber are filled with electrolyte with the same composition, and the electrolyte comprises NaCl, HCl, PbCl2 and a dispersing agent; a ruthenium-plated titanium plate is used as an anode, a stainless steel plate is used as a cathode, and electrolysis is carried out under a constant current condition. According to the method, leaching and electrodeposition are integrated, the technological process is short, energy consumption is low, environment friendliness is achieved, lead in the nickel soot can be efficiently recycled, the recycling rate can reach 90% or above, and remarkable economic and environment-friendly benefits are achieved.

This invention provides a method and system for continuous mining of potash mines based on a rectangular full-face tunneling machine, belonging to the field of mechanized full-face mining technology in underground mines. Firstly, the invention adopts a "loop + three-stage roadway + short-walled room-and-pillar" layout, strictly controlling the exposed area and time of the roof, significantly improving the stability and safety of the mining area. Secondly, through efficient and continuous operation of the entire process of cutting, loading, transfer, and transportation, combining comb-shaped tunneling with unidirectional circulating transportation reduces equipment idle travel, avoids transportation congestion and scheduling conflicts, supports parallel operation of multiple working faces, and completely solves the industry pain point of severe mismatch between mining and transportation efficiency in potash mines. Finally, by precisely matching parameters according to the selection requirements of the rectangular full-face tunneling machine, it has strong adaptability and provides core technical support for the large-scale development of large and extra-large potash mines.

The invention provides a high-salt mine water deep stratum reinjection chemical blockage prediction simulation method, which comprises the following steps of: establishing a water-rock reaction mineral list by analyzing hydrochemical characteristics of reinjection water and underground water of a deep reinjection layer and mineral component content of the reinjection layer, and calculating a chemical blockage prediction result by combining mineral reaction kinetics and nonlinear influence of high TDS (Total Dissolved Solid) on a reaction rate; an underground water flow-chemical reaction coupling model is constructed, and the mineral precipitation process and the influence of the mineral precipitation process on the porosity are simulated. Finally, a risk index (CRI) early warning model based on the porosity change rate is established, quantitative evaluation and graded early warning of the blockage risk of the reinjection well are achieved, and a scientific basis is provided for guiding blockage dredging measures and prolonging the service life of a well hole.

The invention discloses an intelligent anti-corrosion system for potassic salt ore electromechanical equipment and a readable storage medium, and belongs to the technical field of mine electromechanical equipment corrosion prevention. Aiming at the extreme environment of high temperature, high humidity and high chloride ion corrosion under a potassium salt mine, the system integrates four core parts: a subsystem for maintaining dynamic clean air micro-positive pressure in a cavity of electromechanical equipment; the coating subsystem comprises an electrochemical protection layer capable of actively adsorbing chloride ions; the sealing subsystem is made of an intelligent material capable of triggering solid-viscoelastic state phase change; and the monitoring and early warning subsystem is used for realizing early warning of corrosion by fusing acoustics and magnetic signals. According to the invention, through multi-level, active and intelligent cooperative protection, the durability and operation reliability of electromechanical equipment in an extreme corrosion environment are fundamentally improved.

The invention provides a simulation test device and method for deep reinjection of high-salt mine well water under high-temperature and high-pressure conditions. The simulation test device comprises a confining pressure cabin, and a sealing cover is arranged at the top of the confining pressure cabin; in the confining pressure cabin, the upper end of a rubber sleeve is detachably and hermetically sleeved on the water injection pressure head, the lower end of the rubber sleeve is detachably and hermetically sleeved on the water outlet pressure head, and cavities among the water injection permeable plate, the water outlet permeable plate and the rubber sleeve form a water-rock reaction cavity. An oil inlet which is through inside and outside is formed in the side wall of the confining pressure cabin; the oil inlet is connected with a pressure control oil pump through an external oil inlet pipe; an oil outlet which is through inside and outside is formed in the side wall of the confining pressure cabin, the oil outlet is connected with an external oil outlet pipe, and an oil outlet valve is installed on the oil outlet pipe. And a temperature sensor and a temperature control heating sheet are mounted on the inner wall of the confining pressure cabin. The method comprises the following steps: step 1, preparing a mine water reinjection test; and 2, performing reinjection simulation and blockage judgment. And step 3, treatment and analysis after the test. According to the device, the confining pressure borne by rock can be controlled through oil pressure, oil can be heated, and the high-temperature condition of a deep stratum can be controlled through a temperature monitoring system when mine water is reinjected.

The invention discloses an anti-crystallization method of a potassium salt mine underground drainage pump and an intelligent back flushing system. The method is characterized in that a flushing program is automatically started in response to a shutdown signal of the drainage pump, a flushing medium from a flushing water source is reversely injected into a pump cavity through an outlet pipeline of the drainage pump, the residual easily-crystallized process medium is displaced from an inlet pipeline and discharged to an external discharge point, and crystallization in the pump during shutdown is fundamentally prevented. The system comprises a washing water source, a backwashing pipeline, a waste discharge pipeline, control valves on the backwashing pipeline and the waste discharge pipeline, and a controller for automatic control. The invention further relates to an independent mechanical seal protection subsystem which is used for directionally flushing the sealing cavity. Full-automatic and high-reliability shutdown protection is achieved, the problems of impeller jamming, sealing damage and flow channel blockage are thoroughly solved, the service life of equipment is remarkably prolonged, and the operation reliability of the equipment is remarkably improved.

The invention discloses a method for recovering potassium ions in a tail salt mixed solution and application, and the method comprises the following steps: adding brine into the tail salt mixed solution, and mixing to obtain a brine mixed solution; adding the brine mixed solution into a tubular reactor for reaction; after the reaction is finished, carrying out solid-liquid separation to obtain tail solid and tail liquid; according to the recovery method disclosed by the invention, the brine is added into the tail salt mixed solution, and the dissolution of solid potassium salt in the tail salt mixed solution can be promoted by utilizing the unsaturated characteristic of the brine, so that the potassium ions are recycled; in addition, original production equipment can be utilized, and on the premise that power does not need to be increased, the comprehensive recovery rate of salt lake potassium mixed salt mine production is greatly increased.

The invention discloses a safety monitoring and intelligent early warning system and method for salt mine geological disasters, and relates to the technical field of mine safety monitoring, the system comprises a data initialization and deployment module, a multi-source data acquisition module, a data transmission module, a data processing and intelligent analysis module and a visual platform module. By constructing a three-dimensional earth surface and underground model, arranging a multi-source sensing network resistant to high salinity and high humidity, and adopting a distributed data processing architecture fused by edge computing and a cloud platform, full-space and real-time monitoring of salt mine geological disaster key indexes is realized, and an intelligent analysis model and a grading early warning mechanism are combined, so that the comprehensive early warning of salt mine geological disasters is realized. The geological disaster recognition precision, the early warning timeliness and the system operation stability are remarkably improved, and mine safety management is promoted to be transformed to digitization and intelligentization.

The invention discloses a solid potassium salt mine underground real-time water disaster monitoring method and monitoring system. The method comprises the following steps: monitoring the corrosion rate in real time through a micro corrosion probe arranged at an underground water burst point, triggering high-frequency detection of water quality when the rate exceeds a threshold value, and obtaining concentration data of K < + >, Na < + >, Ca < + > and Mg < + > plasmas; after the potassium ion concentration is corrected by adopting a dynamic compensation algorithm, the mixing proportion of each aquifer is calculated by adopting a dynamic ion fingerprint traceability algorithm; and finally, generating a water disaster risk early warning grade in combination with the corrosion rate and the mixing ratio. The system comprises a mobile bearing platform and a corrosion monitoring module, a water quality analysis module, a control processing module and a data communication module which are integrated on the mobile bearing platform. According to the invention, underground in-situ real-time monitoring is realized, an early-warning gateway is moved forward, and a timely and effective technical means is provided for prevention and treatment of solid potassium salt mine water disasters.

The invention belongs to the technical field of salt lake resource development, and discloses a leaching agent conveying system for a salt lake mining area and a water-saving and energy-saving salt mine development system and method.In the leaching agent conveying system, a water source pump station is communicated with a fresh water filter through a pipeline so as to filter a water source provided by the water source pump station; the fresh water filter is communicated with a leaching solution preparation station through a pipeline, and the leaching solution preparation station is used for preparing or preparing a leaching agent required by solid-liquid conversion of salt lake mineral products; the leaching solution preparation station is connected to a salt mine filter through a communicating pipeline, the salt mine filter is used for filtering undissolved salt mine in a leaching agent, and a pump station is further arranged on the communicating pipeline; the salt mine filter is communicated with the main pipeline through a conveying pipeline, the main pipeline is connected with a plurality of branch pipelines used for conveying a leaching agent, the branch pipelines are buried in the ore dissolving target area, and each branch pipeline is provided with a plurality of small holes for the leaching agent to flow out. According to the method, the leaching agent is accurately input, the retention time is prolonged, and the solid-liquid conversion efficiency is efficiently improved.

The utility model relates to the field of rock salt mine drilling water solution mining, in particular to a device for enhancing the strength of a well cementation cement sheath, which comprises a connecting pipe, a connecting rod and a connecting rod, a woven spring is arranged in the spring box, and the spring box is fixed at the bottom of the connecting pipe; the spring laying mechanism comprises a first elastic piece, a second elastic piece, an anchor rod and a trigger device, wherein the first elastic piece and the second elastic piece are fixed to the outer side of the connecting pipe. The first elastic piece is connected with the triggering device, the triggering device can be started according to the diameter change of well cementation, the second elastic piece is released after the triggering device is started, and the second elastic piece pushes the anchor rod and fixes the anchor rod to the inner wall of a drilling well; the anchor rod is connected with the braided spring, when the production casing continues to be pushed downwards, the anchor rod pulls the braided spring to surround the production casing, the thickness of the outer ring space of the production casing in an ore-bearing section can be increased by utilizing the device for well cementation, a cement sheath with high overall structural strength can be formed after the springs are automatically arranged and cement is poured in a reaming section, and the production casing is prevented from being damaged. And the service life of the production sleeve is further prolonged.

The invention discloses an anti-corrosion steel structure water sump system applied to solid potassic salt ore and a manufacturing method of the anti-corrosion steel structure water sump system, and belongs to the technical field of mine drainage. The system comprises at least one modularized steel water tank unit which is composed of a horizontal base, a bottom plate, a side wall plate and a reinforcing rib structure on the outer side; the beam system layout of the horizontal base and the reinforcing rib structure are correspondingly arranged in the vertical direction, and a cooperative stress frame is formed. The manufacturing method comprises the key steps of base welding, box body assembling, reinforcing rib welding, anti-corrosion treatment and the like, specific processes of outer side backing welding and inner side cosmetic welding are adopted for the side wall plates and the bottom plate, and a multi-anti-corrosion coating system containing epoxy zinc-rich primer, epoxy micaceous iron intermediate paint and epoxy coal pitch finish paint is specified in detail. Absolute physical isolation of the gushing water and the soluble ore body is achieved, the problem of leakage pollution is fundamentally solved, and meanwhile the method has the advantages of being reliable in structure, high in durability, capable of achieving prefabricated construction and convenient and fast to maintain.

The invention discloses a drilling solution mining method and system for a deep novel polyhalite potassic salt ore. The method comprises the steps that a target solution mining layer position of a novel polyhalite potassic salt ore body in a mining area is obtained; a first vertical shaft, a second vertical shaft and a horizontal butt joint well are constructed in the mining area, the first vertical shaft and the second vertical shaft are drilled to the target solution mining layer position, and the horizontal butt joint well is arranged in the target solution mining layer position and communicates with the first vertical shaft and the second vertical shaft; after drilling construction is completed, groove building operation is carried out, and a dissolving cavity in a stable state is obtained; fresh water is injected from the first vertical shaft, the injected fresh water further dissolves the cavity wall of the whole dissolving cavity, and generated potassium-containing brine is pumped out from the second vertical shaft and conveyed to a potassium salt production workshop; and meanwhile, a monitoring system is used for carrying out production monitoring in the water injection and brine extraction process, and injection and production parameters are dynamically adjusted and optimized according to a monitoring result. According to the method, green and efficient mining of the novel deep polyhalite potassic salt ore is achieved.

The invention provides a gas channeling prevention system and method for sediment and brine discharge at the bottom of an old cavity of a salt mine. The invention discloses an anti-gas-channeling system for sediment and brine discharge at the bottom of an old cavity of a salt mine. Comprising an injection and production shaft used for gas injection and gas production in the gas injection and bittern discharge process, a bittern discharge shaft production sleeve used for water injection and bittern discharge in the gas injection and bittern discharge process, a water injection pipe used for water injection to an old cavity after gas channeling, a check valve used for preventing gas at the bottom of the well from channeling upwards in the wellhead direction along the water injection pipe, and a pressure gauge. The gate valve is used for closing or opening a brine discharging channel in the brine discharging process, the injection-production wellbore and the brine discharging wellbore production casing pipe are both connected with an old cavity, the brine discharging wellbore production casing pipe is arranged on the outer side of the water injection pipe in a sleeving mode, and a gap is formed between the brine discharging wellbore production casing pipe and the water injection pipe; the check valve is installed at the bottom of the water injection pipe, and the pressure gauge and the gate valve are connected with the top of the brine discharging shaft production casing pipe through pipelines.

The invention discloses a high-salt mine water evaporation and concentration treatment device and a treatment method thereof, and belongs to the technical field of industrial wastewater treatment and renewable energy utilization. The high-salt mine water evaporation and concentration treatment device comprises an evaporation reactor, and an evaporation chamber and a condensation chamber which are communicated with each other are arranged in the evaporation reactor; an inclined condensation top cover is arranged at the top of the evaporation reactor, one end, located in the evaporation chamber, of the condensation top cover is higher than one end, located in the condensation chamber, of the condensation top cover, a plurality of evaporation balls capable of floating on the liquid level are arranged in the evaporation chamber, an aeration device is arranged at the bottom of the evaporation chamber, and the evaporation balls can be fluidized and rolled during aeration of the aeration device. The device can remarkably improve the total heat efficiency and evaporation rate of the system, and the problem that the efficiency is reduced due to scaling and crystallization is fundamentally solved. The treatment method can effectively improve the evaporation rate, reduce the energy consumption of the system and realize the self-cleaning effect of the system.

The utility model relates to dust collection equipment field discloses a combined multi -point assembly dust collection equipment, including side hang top suction subassembly and side hang side suction subassembly, side hang top suction subassembly and side hang side suction subassembly replaceably and heading machine connect, side hang side suction subassembly includes the standard air pipe and round air inlet pipe connected in proper order, and the round air inlet pipe is used for and standard air pipe connection, side hang side suction subassembly's standard air pipe and round air inlet pipe all and heading machine side surface connect, side hang top suction subassembly includes the standard air pipe, variable cross section transition pipe, former rotation upper transition pipe, upper rotation former transition pipe and rectangle air inlet pipe connected in proper order, and variable cross section transition pipe is used for and standard air pipe connection, and the section level direction of rectangle air inlet pipe is long side, side hang top suction subassembly's standard air pipe, variable cross section transition pipe and former rotation upper transition pipe all and heading machine side surface connect, upper rotation former transition pipe and rectangle air inlet pipe all and heading machine top surface connect, be suitable for small section potassium salt mine lane or coal lane operation.

The application provides a method for filling and grouting in a salt mine underground goaf, wherein a nozzle of a grouting pipe column is lowered into sediment in the goaf, a first-stage waste mud is injected into a gap in the sediment in the goaf, the particle diameter of the first-stage waste mud is between 0.001 and 0.05 mm, the grouting pipe column is lifted to a space of pure brine in the goaf, a second-stage waste mud is injected into the space of pure brine in the goaf, the particle size of the second-stage waste mud is not more than 1 cm, a non-uniformity coefficient is greater than or equal to 5, and a curvature coefficient is between 1 and 3, the grouting pipe column is lifted to a roof of the goaf and a "neck", a third-stage waste mud is injected into the roof of the goaf and the "neck", the third-stage waste mud contains a cementing material with a mass fraction of 3% to 10%, and the method can efficiently fill a gap in the sediment at the bottom of the goaf of the salt mine, thereby improving the filling efficiency of the waste in the goaf of the salt mine.

This utility model relates to the technical field of salt mine mining, and more particularly to a fully horizontal section suspended tailpipe mining system for directional docking wells in salt mines. The system includes: a vertical well, with its bottom vertically penetrating the salt layer, and a single well forming a convection channel to create a solution cavity; a directional docking well, comprising a horizontal section and a vertical section; wherein the horizontal section communicates with the solution cavity, the bottom of the vertical section extends into the salt layer, and its end forms a fluid channel with the solution cavity through a tailpipe installed inside the horizontal section, with brine extraction channels arrayed on the tailpipe; casing, respectively installed in the vertical sections of the vertical well and the directional docking well, with cemented sheaths between them and their respective well walls; and a production control unit, including a wellhead device, surface pipelines, and flow and pressure monitoring equipment. The wellhead device is installed at the wellhead positions of both the vertical and directional docking wells, and the surface pipelines connect to the wellhead device to form water injection and brine extraction loops. This system solves the technical problems of low efficiency and poor safety in traditional salt mine mining.