118 results about "Salt mine" patented technology

The invention relates to the technical field of hydraulic supports for potassic salt mines, in particular to an assembling device and method for a top beam of a hydraulic support for potassic salt mines, the assembling device comprises a first tool used for pre-assembling an outer main reinforcement assembly, and in a first positioning state, a positioning plate is supported on one side of a main reinforcement corresponding to the outer main reinforcement assembly in parallel; the corresponding lug plates or flitch plates are positioned between the positioning plates and the main reinforcements; the top beam has the beneficial effects that the inner main reinforcement assembly and the outer main reinforcement assembly are both pre-assemblies, that is, the subsequent assembling and welding processes are carried out after welding is completed to form a module, the assembling efficiency of the top beam is improved, and the assembling efficiency of the top beam is improved. Under the action of the first tool, the outer main reinforcement assembly can be efficiently assembled, and the possibility of wrong assembly is reduced through accurate positioning, so that the safety and the stability of the whole structure are improved.

The invention relates to the technical field of salt-containing mine water treatment, and discloses a salt-containing mine water zero discharge treatment method for external cooler in-situ descaling, which comprises the following steps: S1, carrying out suspended matter removal and membrane concentration on salt-containing mine water, and sequentially carrying out evaporative crystallization to separate anhydrous Na2SO4, freezing crystallization to separate mirabilite, evaporative crystallization to separate NaCl and drying to obtain carnallite; collecting steam condensate water formed after heat exchange of the steam condensate water used in the evaporative crystallization and steam condensate water evaporated in the drying process; s2, when scale is formed in a cold exchange pipe of the external cooler used in the freezing crystallization process in the step S1, the scale is removed by adopting the following method: refrigerating fluid in the external cooler is subjected to heat exchange by adopting the steam condensate water collected in the step S1, and then flows back into a refrigerating fluid pipeline of the external cooler; and / or live steam is introduced into the cold exchange pipe. According to the method, in-situ descaling can be achieved under the condition that the external cooler is not disassembled, the labor cost can be reduced, and the salt separation crystallization treatment efficiency is improved.

The invention relates to the field of rock salt mine well drilling water solution mining, in particular to a device for enhancing the strength of a well cementation cement sheath, which comprises a connecting pipe arranged at the bottom of a production casing; 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; when well cementation is conducted through the device, the thickness of the outer ring space of the production casing of the ore-bearing section can be increased, a cement sheath with the high overall structural strength can be formed after springs are automatically arranged and cement is automatically poured in the hole expanding section, and the production casing of the ore-bearing section is prevented from being damaged. And the service life of the production sleeve is further prolonged.

The invention relates to the technical field of well mine salt mining, in particular to a twin-well brine mining device capable of increasing salt mine brine content and a multi-well series connection method thereof, the device comprises a newly-built well unit, a single-well convection brine mining process is set, and the newly-built well unit comprises a water injection well and a brine mining well; the old well unit adopts a twin-well convection brine extraction process and comprises a water injection well and a brine extraction well; the pipeline connecting system is used for communicating the brine extraction well of the newly-built well unit with the water injection well of the old well unit; the flow adjusting device is arranged on the pipeline connecting system and used for adjusting the flow in the pipeline; the central control system is used for monitoring and adjusting operation parameters of each well group; by establishing a series system between the newly-built well and the old well, graded utilization and circulation optimization of brine resources are achieved, a traditional independently-operated well group is converted into an organic whole for cooperative production, low-concentration brine generated during the groove building period of the newly-built well can be secondarily utilized by the old well, and therefore the utilization rate of the resources is remarkably increased.

The invention relates to the field of salt mine drilling well plugging, in particular to a bag type drilling well leakage plugging device capable of being used in a combined mode and a using method thereof.The bag type drilling well leakage plugging device comprises a drilling well and a drilling rod installed in the drilling well and further comprises a connecting sleeve composed of two plate bodies, and the connecting sleeve is connected with the surface of the drilling rod in an attached mode; a first bag body is arranged on the outer side of the surface of each connecting sleeve, grouting bases are arranged on the surfaces of the connecting sleeves, a second bag body is arranged between the two grouting bases, a liquid filling channel and a grouting channel are formed in the top of the surface of each connecting sleeve, and a filling connecting piece is arranged between the two grouting bases. A grouting opening is formed in the surface of the grouting seat; the bag structure is adopted, combined use is formed, the two sides of a leakage point are plugged through the first bag body, the closed area is formed, cement grout is injected into the closed area, the leakage point is plugged, meanwhile, the second bag body isolates the cement grout from the drill rod, drill jamming is prevented, and practicability is improved.

The invention relates to the technical field of salt mine collection, in particular to a stoping and filling device of a salt mine well and an anti-accumulation method of the stoping and filling device, the device comprises a butt joint well group, and the butt joint well group comprises a mud inlet well and a brine outlet well and is used for achieving backfilling of calcium magnesium mud and stoping of brine; the well logging system is used for detecting the shaft condition and the position of a cavity top plate; the pipe cutting equipment is used for cutting off the sleeve at a preset position below the top plate of the dissolving cavity; the sonar cavity measuring equipment is used for measuring the spatial form of the dissolving cavity; scale on the inner wall of the casing pipe is removed through a high-pressure water nozzle and steel wire brush composite cleaning technology, and pipe cutting position control accurate to the millimeter level is matched, so that a slurry conveying channel is unobstructed, the problem of pipeline blockage is solved, and production halt loss caused by blockage is avoided.

The invention provides a microbial liquid bacterial fertilizer prepared from high-salt mine gushing water, a preparation method of the microbial liquid bacterial fertilizer and application of the microbial liquid bacterial fertilizer in treatment of polluted soil in a coal mine area. The microbial liquid bacterial fertilizer consists of a first group of liquid bacterial fertilizer and a second group of liquid bacterial fertilizer. The preparation method comprises the following steps: 1) pretreating mine gushing water; 2) preparing a fermentation substrate; 3) preparing a first group of liquid bacterial fertilizer; and 4) preparing a second group of liquid bacterial fertilizer. The first group of liquid bacterial manure is used for solidifying heavy metals in soil and reducing the mobility of the heavy metals; the second group of liquid bacterial fertilizer is applied after 30 days, the content of phosphorus, potassium and nitrogen in the soil is increased, and the soil fertility is improved. According to the method, the high-salt mine gushing water is effectively utilized, resource reutilization is achieved, meanwhile, the dual effects of heavy metal stabilization and soil remediation are achieved through staged bacterial fertilizer application, and an efficient solution is provided for ecological remediation of a coal mine area.

The invention discloses a magnetic foaming freeze-dried modified chitosan material as well as a preparation method and application thereof, and belongs to the field of underground water treatment in coal mine areas. The magnetic foaming freeze-drying modified chitosan material is obtained by combining ferroferric oxide modification, sodium dodecyl sulfate foaming modification and instant freezing modification, and the magnetic foaming freeze-drying modified chitosan material is of a modified chitosan microsphere structure suitable for adsorption of mine water pollutants. And the adsorbent can stably exist in neutral, alkaline and high-salt mine water solutions, and has relatively good removal capability on metal ions such as iron, manganese and calcium in the mine water.

The invention discloses a salt mine sediment void petroleum and brine migration simulation and parameter optimization evaluation method, which comprises the following steps: obtaining physical characteristic parameters of salt mine sediment, petroleum and brine, the sediment parameters at least comprising void ratio and pore connectivity obtained through CT scanning; calculating an evaluation index based on a simulation result, and performing quantitative evaluation and feasibility screening on the migration process; if the optimal potential exists, parameter optimization and scheme iteration are further executed, and a simulation-evaluation-optimization closed loop is formed; and finally, checking the model through field test data. The method solves the problem that in the prior art, no means for simulating and evaluating the two-phase migration of the petroleum brine in the salt mine sediment gaps exist, the process can be quantitatively simulated, evaluated and optimized, and scientific, accurate and systematic technical support is provided for petroleum storage through the high-impurity salt mine sediment gaps.

The invention discloses a reverse osmosis treatment method for salt-containing mine well water. The method comprises the following steps: adding a reverse osmosis scale inhibitor into the pretreated and softened salt-containing mine well water, and filtering the salt-containing mine well water in a security filter; the filtered mine water is subjected to heat exchange through a heating heat exchanger and then enters a reverse osmosis device; concentrated water generated by the reverse osmosis device flows back into the reverse osmosis device and is circulated again for reverse osmosis; concentrated water discharged from the reverse osmosis device enters the evaporative crystallization salt separation device; and high-heat condensed water generated by the evaporative crystallization salt separation device is used as a heat source of the heating heat exchanger and chemical cleaning replenishment water of the reverse osmosis device. By adopting a one-stage and one-section design, the reverse osmosis treatment process can be effectively shortened, and the occupied area is reduced; concentrated water is recycled, so that the reverse osmosis recovery rate is greater than or equal to 90%; discharged concentrated water can directly enter the evaporative crystallization salt separation system, high-heat condensate water generated by the evaporative crystallization salt separation system serves as a raw water heat exchange heat source and reverse osmosis chemical cleaning replenishing water, and sodium sulfate decahydrate can be prevented from being separated out from the concentrated water under the low-temperature condition.

The invention relates to a hydraulic support base for potassic salt ore. The hydraulic support base comprises a first base body, a second base body, a gap bridge plate, a first connecting pin and a second connecting pin. Strip-shaped holes extending in the vertical direction are formed in the two ends of the gap bridge plate; a first lug plate is arranged on the inner side of the first base, and a second lug plate is correspondingly arranged on the inner side of the second base; the long-strip-shaped holes in the two ends of the gap bridge plate are hinged to the first lug plate and the second lug plate through a first connecting pin and a second connecting pin respectively. The axial directions of the first connecting pin and the second connecting pin are front and back directions; the first connecting pin and the second connecting pin can slide along the long-strip-shaped hole, dislocation of the first base and the second base is achieved, and therefore the support can cope with potassic salt ore bottom plates of different forms, and the support has the advantages that local suspension or stress concentration caused by unevenness of the potassic salt ore bottom plates can be effectively avoided, and the stability of the support under the potassic salt ore complex terrain is maintained. And the position of the base can be flexibly adjusted according to site ground conditions, installation is rapidly completed, and the installation time is greatly shortened.

The utility model relates to the technical field of salt mine drilling accessories, concretely to salt mine drilling water solution mining anti -blocking water injection head, including the water injection pipe head of salt mine drilling water solution mining, the top end coaxial of water injection pipe head is provided with the connecting socket, the bottom coaxial of water injection pipe head is installed with the water injection end, the utility model discloses the water injection pipe head and the water injection cavity that sets up inside it are set up, cooperate the anti -blocking water injection inner tube of embedding in the bottom of water injection pipe head and the spiral feeding rod of installing in the anti -blocking water injection inner tube, make when salt mine drilling water solution mining, the deceleration motor can drive spiral feeding rod to rotate continuously in the anti -blocking water injection inner tube, effectively prevent solid particles or impurities from accumulating and blocking at the water injection end when salt mine drilling, the water inlet hole of anti -blocking water injection inner tube outer wall opening guarantees the water in water injection cavity can smoothly enter anti -blocking water injection inner tube and transport to the water injection end, and the connecting socket of water injection pipe head top end coaxial setting is convenient for with external water injection equipment stable connection.

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 application provides a thermal infrared hyperspectral characteristic wave band selection method based on an improved particle swarm algorithm, and comprises the following steps: step 1, preparing a mixed salt ore sample, collecting a hyperspectral emissivity spectrum of the mixed salt ore sample, measuring the mass content percentage of each mixed salt mineral in the mixed salt ore sample as a data set for selecting a characteristic wave band and predicting a content; step 2, taking the data set in step 1 as input, and establishing a prediction model of a characteristic wave band combination of each substance in the mixed salt ore and corresponding content prediction based on the improved particle swarm algorithm; step 3, based on the prediction model in step 2, predicting the characteristic wave band combination of each substance in the unknown mixed salt ore and the corresponding content, collecting the content percentage of the mixed salt ore and verifying the result. The improved particle swarm algorithm does not need to artificially adjust the parameters of the algorithm, and the obtained wave band combination prediction result is stable.

The present invention provides a microbial liquid fertilizer prepared by using high-salt mine drainage, a preparation method thereof, and an application thereof in the treatment of polluted soil in coal mining areas. The microbial liquid fertilizer is composed of a first group of liquid fertilizer and a second group of liquid fertilizer. The preparation method includes: 1) pretreatment of mine drainage; 2) preparation of a fermentation substrate; 3) preparation of the first group of liquid fertilizer; 4) preparation of the second group of liquid fertilizer. The first group of liquid fertilizer is used to solidify heavy metals in the soil and reduce their mobility; the second group of liquid fertilizer is applied after 30 days to increase the contents of phosphorus, potassium, and nitrogen in the soil and improve soil fertility. The present invention effectively utilizes high-salt mine drainage, realizes resource recycling, and at the same time, through staged application of the fertilizer, achieves the dual effects of heavy metal stabilization and soil remediation, providing an efficient solution for ecological restoration in coal mining areas.

The invention discloses a stability evaluation method for converting an old cavity of a salt mine with inclined interlayer into a gas storage reservoir, which belongs to the field of resource utilization of abandoned salt mines. The method firstly uses a three-dimensional seismic exploration technology to determine the geological structure characteristics of the rock layer area where the old cavity of the salt mine is located. The three-dimensional morphology of the salt cavity of the vertical well and the inclined well of the old cavity of the salt mine is measured to obtain a three-dimensional image and volume of the old cavity of the salt mine. Then, a data well is drilled in the near field outside the old cavity of the salt mine, and the core of the data well is extracted for testing to obtain the physical and mechanical parameters of salt rock, mudstone and interlayer. A geomechanical numerical model of the old cavity of the salt mine is established. Finally, the dynamic stability of the gas storage reservoir under different working gas pressures and operating parameters is evaluated. The method realizes a quantitative evaluation of the stability of the gas storage reservoir converted from the old cavity of the docking well with inclined interlayer, and optimizes reasonable storage capacity parameters to improve the stability of the gas storage reservoir converted from the old cavity of the docking well.

The utility model provides a coring device which comprises a placing table, a connecting plate is arranged in the placing table in a sliding mode, a frame plate is arranged in the connecting plate in a sliding mode, a mounting ring is arranged in the frame plate in a rotating mode through a rotating column, a first motor is arranged in the mounting ring, and an output shaft of the first motor is connected with a coring drill cylinder through a coupler. A first electric push rod is arranged at the upper end of the connecting plate, the telescopic end of the first electric push rod is connected with the upper end of the frame plate, an adjusting mechanism used for adjusting the angle of the coring drill barrel is arranged on the right side of the frame plate, a front-back moving mechanism for driving the coring drill barrel to move front and back is arranged at the lower end of the containing table, and a clamping mechanism is arranged at the upper end of the containing table. According to the coring device, drilling and coring can be carried out on multiple positions of the rock salt mine without releasing a clamping mechanism or manually adjusting the position of the rock salt mine by personnel, the coring speed can be obviously increased, the non-production time is shortened, the manual intervention is reduced, the operation risk is reduced, and the personnel safety is guaranteed.

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 invention provides a high-impurity salt mine sediment gap oil storage injection and production operation parameter optimization device and method, and the device comprises a transparent heat-insulation pressure-resistant safety box, an acrylic salt cavity, an oil injection and production assembly, a brine injection and production assembly, an air compression assembly, a temperature regulation and control assembly and a sealing assembly. The whole injection-production operation process of sediment gap oil storage of a single salt cavity and double salt cavities (U-shaped cavities) of a salt mine is simulated, and circulation control over whole-process oil injection and brine discharge and brine injection and oil production under the conditions of different grading sediments, different oil / brine injection rates and pressures and different ground temperatures can be achieved. The oil injection / extraction rate and the brine injection / discharge rate under different injection and extraction conditions and the recovery ratio of sediment gap oil storage are obtained, the microscopic flow condition of oil brine / gas displacement in the sediment gap is obtained, and therefore the oil storage volume and the oil storage capacity of the salt mine sediment gap are determined, and sediment oil storage injection and extraction operation adjusting parameters are established. According to the invention, the injection-production working condition in a real underground salt cavity can be simulated, and the feasibility exploration of sediment gap oil storage whole-process control and gas injection and oil production is realized.

The invention discloses a production method of potassium sulfate and magnesium fertilizer, which comprises the following steps: placing a potassium mixed salt ore in high potassium brine under stirring conditions for conversion reaction, wherein the potassium ion content in the high potassium brine is 2.0% to 2.5%, and the magnesium ion content is 3.5% to 5.5%; after the conversion reaction is completed, adding a collecting agent to the reaction solution for flotation to obtain flotation foam and flotation slurry; filtering, drying and packaging the flotation foam to obtain the potassium sulfate and magnesium fertilizer. The production method of potassium sulfate and magnesium fertilizer of the invention uses high potassium brine as a conversion flotation medium, and by using the specific flotation medium to replace the traditional process of using fresh water and decomposition mother liquor as the conversion flotation medium, the potassium recovery rate in the potassium mixed salt ore can be significantly improved, and the specific recovery rate can be as high as 78% or more, which effectively reduces the consumption of potassium mixed salt ore in salt fields and reduces production costs.

The invention relates to a hydraulic support structural member anti-corrosion treatment method suitable for potassic salt ore, which comprises the following steps: S1, pretreatment; s2, loading an oxide ceramic precursor on the clean structural member, and heating and decomposing to form a compact barrier layer to obtain a primary structural member; the resistivity of the barrier layer is in the range of 1 * 10 < 6 >-1 * 10 < 9 > omega.cm; s3, coating the surface of the primary structural member with a coupling agent to obtain a secondary structural member; s4, the surface of the second-level structural part is coated with conductive putty, and a third-level structural part is obtained; and S5, anti-corrosion paint dry powder is electrostatically sprayed on the third-stage structural part, an anti-corrosion coating is formed through curing, and the hydraulic support structural part subjected to anti-corrosion treatment is obtained. The technical problems that in the prior art, a coating of a hydraulic support structural part is poor in protection effect under the corrosive environment with high permeability, corrosive substances can easily penetrate through the coating, and the adhesive force is reduced too fast in the using process are solved.

The utility model discloses a chain type salt mine mining device which comprises a bottom plate, a mining box, a protective door, a collecting box, a mining assembly, a mining blade and a cleaning device, the cleaning device is arranged, cleaning liquid on the inner side of a water storage tank is extracted through a water suction pump, and the cleaning liquid is conveyed to the inner side of a spraying pipe through a conveying pipe; a plurality of groups of spraying heads are used for spraying and cleaning a groove of a chain, a sliding mechanism is matched with a fixing plate to drive a spraying pipe and the plurality of groups of spraying heads to synchronously translate, a conveying pipe has good flexibility, and the angle is adjusted in cooperation with translation of the spraying pipe, so that the multi-angle cleaning effect on the groove of the chain is improved; by arranging a sliding mechanism, a driving motor drives a driving shaft to drive a movable connecting rod to perform fixed-point rotation adjustment, and drives a sliding block to perform circular rotation adjustment and perform vertical sliding adjustment along the middle part of a movable plate, so that the movable plate performs translation sliding guide along the joint of every two of four groups of soft rubber guide heads; and the spraying pipe and the fixing plate synchronously translate to adjust the angle.

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.

The present invention provides an underground soluble salt mining structure and method based on leakage recharge, belonging to the technical field of soluble salt mining, including a recharge channel well, a brine production well, a sealing assembly, and a connecting well. The connecting well is opened inside the soluble salt ore layer. The brine production well penetrates through the upper rock formation and extends into the soluble salt layer. When a confined aquifer is located above the soluble salt layer to form an upper confined aquifer, the recharge channel well penetrates through the upper rock formation and the upper confined aquifer and extends into the soluble salt ore layer. The present invention utilizes the pressure of the underground confined water itself, and through an artificial recharge channel, enables the underground confined water to enter the soluble salt layer, and then dissolves and mines the soluble salt. On the one hand, it solves the problem of insufficient surface fresh water volume, and on the other hand, by utilizing the advantage that the groundwater temperature is higher than that of surface water, it can improve the dissolution efficiency of soluble salt to a certain extent, and further improve the mining efficiency of soluble salt.

The invention discloses a method for producing potassium chloride by using potassium mixed salt and carnallite based on a mixed slurry method. The method is specifically realized through the steps of raw material grinding, raw material mixing, decomposition, suction filtration, flotation, suction filtration, weighing, test analysis and potassium chloride purification. According to the method, the raw ore (carnallite and potassium mixed salt) and the mother liquor are mixed and optimized to prepare potassium chloride, the optimal proportion of the potassium mixed salt ore to the carnallite is obtained, qualified potassium chloride with high yield is produced, and the problems of high cost and low quality of potassium chloride production are solved; the recovery rate of potassium in the potassium mixed salt mine is low, the resource utilization rate is not high, and the production pressure of carnallite is high. And the problems that the quality of the prepared product and the recovery rate of potassium in the potassium mixed salt mine are different due to the inaccuracy of the ratio and the technical points of the process in the actual production are also solved. Particularly, the composition of the carnallite slurry is not greatly changed; and interference on devices of a carnallite production line and influence on decomposition and batching work of an efficient decomposition machine are avoided.

The invention provides an oil-control washing mask and a preparation method thereof, and the oil-control washing mask comprises the following components in percentage by weight: 88-90% of a solvent, 5-6% of a humectant, 0.3-0.4% of a thickener, 0.45-0.95% of an emulsifier, 0.2-0.6% of an antioxidant, 0.03-0.1% of a chelating agent, 0.1-0.2% of a pH regulator, 3-4% of a skin conditioner and 0.1-0.5% of salt mine mud. The oil-control washing mask obtained by the scheme is fresh and cool in texture and not greasy, and can take away skin dirt when being washed off, so that nutritional ingredients are easier to absorb, water-oil balance of the skin is maintained, and no burden is brought to the skin.