968 results about "Aquifer" patented technology

A system for purifying and delivering surface water from rain or snow-melt to the local aquifer in order to increase the local groundwater level, is disclosed. The system includes activated charcoal for removal of contaminants including per- and polyfluoroalkyl substances, commonly referred to as PFAS, from surface water prior to delivering the water to the aquifer.

The invention discloses a wellhead data acquisition modeling system. The wellhead data acquisition modeling system comprises a data acquisition module, a hydraulic characteristic processing module, a well layer coupling modeling module and an interaction control module, the invention belongs to the technical field of well water monitoring management, based on an adaptive time-frequency analysis method, a dynamic window function enhanced by local frequency spectrum entropy is introduced, feature extraction and abnormal early warning are performed on transient hydraulic fluctuation signals, and the time-frequency resolution and change recognition capability of the hydraulic signals are remarkably improved; a dynamic coupling model between a water pumping system and an aquifer is constructed by combining a multi-scale parameter coordination mechanism, and accuracy and dynamic adaptability of well layer response modeling are realized by introducing a gap compression lag function and a joint parameter calibration method; and the interaction control module implements model prediction control according to the hydraulic feature vector, the hydraulic anomaly early warning signal and the well layer coupling prediction parameter combination, and outputs wellhead data acquisition decision support data.

The invention provides a burnt rock aquifer water disaster prevention and control design method which comprises the following steps: exploring mine geological and hydrogeological conditions, determining burnt rock distribution characteristics, an aquifer range and a water-rich abnormal region, and constructing a burnt rock aquifer water diversion characteristic judgment system; on the basis of the residual bursting coefficient of the burnt rock, a calculation formula of the development height of the burnt rock stratum water-flowing fractured zone is corrected, and the development height of the working face mining overlying strata water-flowing fractured zone is accurately judged through the formula; constructing a burnt rock water-bearing layer risk evaluation system according to the relationship between the burnt rock water-bearing layer position and the development height of the water-flowing fractured zone; according to the danger evaluation system, the'intercepting-dredging-building 'burnt rock aquifer layering treatment method is provided. Compared with traditional aquifer water disaster treatment, the method has the advantages that the aquifer damage of the burnt rock can be judged more accurately, layered treatment is more economical and efficient, and the method is of great significance to prevention of underground water inrush accidents and underground water loss and realization of safe, efficient and green mining of coal.

The invention discloses an earth surface and underground water interactive simulation method and system based on aquifer analysis, and relates to the technical field of earth surface and underground water interactive simulation. An earth surface and underground water interactive simulation system based on aquifer analysis comprises a data acquisition module, a data processing module, an aquifer analysis module, a model simplification module, an interactive simulation module and a resource management module. According to the method, data sampling is performed on high-resolution data in the preprocessed earth surface data and underground data, so that key information in the data can be reserved, and the data volume needing to be processed can be remarkably reduced under the condition that the precision of the model is not remarkably influenced; therefore, the calculation complexity and the calculation amount are reduced, the calculation efficiency and the operation efficiency of the model are improved, the model can be helped to better process noise and abnormal values, the over-fitting risk of the model is reduced, and the robustness and the generalization ability of the model and the performance and the reliability of the model in practical application are improved.

The invention discloses a method for dynamically predicting the underground water level during excavation of an overtopping ground layer foundation pit, and relates to the technical field of dynamic prediction of the underground water level, which comprises the following steps of: acquiring multi-source data related to the underground water level in an engineering range; comprising information of soil moisture content, stratum permeability coefficient, rainfall capacity, foundation pit excavation depth, foundation pit dewatering scheme and foundation pit waterproof and drainage measures; historical underground water level, underground aquifer data and Yangtze River water level change information are obtained. According to the method, data quality is optimized through multi-source data acquisition, correlation analysis and z-score standardization, nonlinear modeling is realized in combination with a support vector machine (SVM) and Bayesian optimization, and model precision and generalization ability are improved. Model parameters are dynamically adjusted through a real-time monitoring and feedback optimization mechanism, the adaptability to sudden hydrological changes is enhanced, engineering risks are effectively reduced, and construction safety and economical efficiency are guaranteed.

The invention discloses a water-preserved mining distinguishing method for in-situ protection of floor confined water. The water-preserved mining distinguishing method comprises the following steps that the average distance between a mining coal seam floor and an aquifer, the average thickness of the aquifer, the average permeability, the working face length and the advancing distance length are determined; the average depth of the mining floor fracture zone and the average thickness and the average permeability of all rock strata below the fracture zone are tested, and the equivalent permeability is obtained; the water pressure of the confined aquifer is tested and counted, and target water pressure is determined; calculating the allowable coal mining loss water resource quantity; determining a critical equivalent permeability coefficient; the equivalent permeability is compared with the critical equivalent permeability, and the calculated water inflow is compared with the safe recovery water inflow of the working face; and finally, the feasibility of water-preserved mining of in-situ protection of the confined water of the floor is judged. Based on the dynamic water storage and release characteristics of the confined aquifer, the mining floor effectively obstructs the overall water blocking performance of the rock stratum, the water-preserved mining judgment method for in-situ protection of the confined water of the floor is provided, operation is easy and convenient, and the field applicability is high.

The invention provides a safe and rapid evaluation treatment method for overlying strata water diversion under working face mining, in the treatment method, before working face stoping, a waterproof curtain is constructed along the boundary of a surface subsidence range, the waterproof curtain extends into a bottom water-resisting layer from the surface, so that the waterproof curtain is constructed along the vertical projection direction; and the bottom aquifer in the surface subsidence range is completely sealed by the waterproof curtain, so that water inside and outside the waterproof curtain does not interfere with each other, and the water volume influencing the stoping of the working face is reduced. A plurality of water level and crack monitoring assemblies are arranged at the same time, in the stoping process of the working face 1, the water level condition in a waterproof curtain and the crack condition generated by sinking of a bottom waterproof layer are monitored in real time through the water level and crack monitoring assemblies, and corresponding treatment measures are taken according to the corresponding conditions; the waterproof curtain, the grouting operation and the water pumping operation cooperate with one another, the effect that no water is stored in the waterproof curtain is achieved, meanwhile, the construction cost can be greatly reduced, the construction efficiency is improved, and the ecological environment is protected.

The invention provides a multi-source information fusion mining overlying strata high separation layer water disaster prediction evaluation method, which comprises the following steps of: constructing a coal mining, overlying strata structure index, strata space occurrence and cretaceous system aquifer prediction index system according to related data of hydrogeology, engineering geology and coal mining in a research area; through the separation water disaster multi-source information fusion prediction evaluation model of the subjective-objective weight combination of the analytic hierarchy process, the entropy weight method and the CRTIC method, accurate prediction evaluation of the separation water disaster is realized, the error of the traditional separation water disaster prediction result is reduced, the water disaster threat of the stope face is greatly reduced, a guarantee is provided for safe mining of a coal mine, and the economic benefit of the coal mine is improved. And coal mine water disaster prevention and control measures and safety production are effectively guided.

A method of analyzing a caprock of an aquifer includes determining, using a laboratory measurement device, a threshold hydraulic gradient of the caprock at which brine flows vertically in the caprock. The method further includes determining a breakthrough pressure of the caprock, wherein the breakthrough pressure reflects a difference between a CO2 pressure in the aquifer and a brine pressure in the caprock. The method further includes calculating, via a computing system that includes one or more hardware processors, an effective breakthrough pressure of the caprock based on the threshold hydraulic gradient and the breakthrough pressure, wherein the effective breakthrough pressure accounts for non-Darcy flow of the brine within the caprock.

The invention discloses a thermal tracing test device and method for determining the comprehensive hydrogeological condition of an aquifer, and the device comprises a water storage system, a medium groove, a heating system, and a distributed optical fiber data collection system. The device is simple in structure and intelligent and convenient to operate, instantaneous / continuous linear heat source excitation can be achieved through the heating system, and the water pressure and temperature change conditions of all positions are monitored in real time through the distributed optical fiber data acquisition system; the comprehensive hydrogeological parameters such as the flow velocity, the flow direction, the permeability coefficient, the thermal diffusion coefficient, the thermal capacity and the heat conductivity coefficient of underground water are studied, the heating system and the distributed optical fiber data acquisition system can be used for indoor tests and field tests, operation is easy and convenient, data precision is high, and practicability is high.

An evaluation method and system for fine division of the water richness of an unconsolidated aquifer in a mine shaft. The method comprises: using an aquifer thickness, a sand and gravel bed thickness, a lithology-thickness index, a sandstone-to-formation thickness ratio and the number of sand and gravel beds to constitute evaluation indexes, and thus establishing an evaluation index matrix; unifying variation ranges of different evaluation index data, performing normalization processing to obtain a processed standard evaluation matrix, and thus constructing a water richness evaluation index system of a "bottom aquifer"; in light of the constructed water richness evaluation index system of the "bottom aquifer", according to the principle of a projection pursuit model, establishing an aquifer water richness evaluation model by means of DPS software; in the aquifer water richness evaluation model, performing linear projection and constructing a projection objective function; optimizing the projection objective function to determine an optimal projection direction; and substituting the optimal projection direction into an expression of linear projection to obtain projection eigenvalues capable of reflecting each evaluation index information, so as to perform comprehensive evaluation on an evaluation object.

The invention relates to the technical field of deep underground space stratum reinforcement, in particular to a CO2 transcritical freezing system and method.The CO2 transcritical freezing system comprises a freezing subsystem which comprises a first liquid inlet pipe and a first liquid return pipe which are arranged above a stratum and used for conveying low-temperature liquid CO2 to the stratum to conduct stratum freezing construction; the liquefaction subsystem is used for compressing the volume of the normal-temperature gaseous CO2, so that the movement of molecules in the gaseous CO2 is limited and reduced, and the gaseous CO2 is converted into low-temperature liquid CO2; and an inlet and return pipeline subsystem. The CO2 medium adopted by the invention effectively solves the problems of flammability, explosiveness, high risk, difficulty in treatment, environmental pollution and the like caused by liquid ammonia and saline water utilized in the traditional freezing construction; and a water-bearing layer, a soft stratum and the like are frozen and reinforced through compressed and converted low-temperature liquid CO2, a water-resisting layer and a temporary support are formed, seepage of water and sinking, displacement and collapse of the wall face and the bottom plate are effectively prevented, and the stability of the frozen area to be excavated is improved.

An early warning method for debris flow disaster in a small watershed, and a disaster reduction method for debris flows in a small watershed is disclosed. An early warning method for debris flow disaster in a small watershed is provided, in which parameters of a hydrological model are calibrated by rainfall, evaporation and runoff data of the watershed based on water balance of the watershed, and an early monitoring and warning scheme for debris flows, which takes water storage in the watershed as a core monitoring and evaluation indicator, is established. The GR4J hydrological model is improved by taking into account a watershed area, specific yield of an aquifer and several geological parameters, as well as an evapotranspiration effect of vegetation. A disaster reduction method by means of regulation of a drainage channel can provide a basis for mathematical model simulation studies of disaster reduction in small watersheds.

The invention discloses a mining affected zone aquifer in-situ recovery method, equipment, medium and product, and relates to the field of mining subsidence science, and the method comprises the following steps: carrying out modeling based on obtained geological and hydrological data containing overlying strata aquifer occurrence information, and obtaining numerical simulation results under different working face parameter combination conditions; establishing a boundary function expression of the coal pillar side mining flowing water fractured zone according to geological and hydrological data and the numerical simulation result; according to the boundary function expression of the coal pillar side mining water flowing fractured zone, determining the intersection position of the water flowing fractured zone and the aquifer; according to the intersection position, a plugging position grouting instruction is generated; determining a water-resisting layer reconstruction opportunity and a filling area of a grouting filling zone; according to the filling area of the grouting filling belt, a water-resisting layer grouting instruction is generated; and after the reconstruction of the water-resisting layer is completed, generating a plugging position damage instruction. Additional subsidence and mine water resource loss can be prevented, and then the aquifer and the surface ecological environment are protected.

The invention belongs to the technical field of geological engineering, and particularly relates to a confined aquifer drilling drainage depressurization enhanced grouting method which comprises the steps that the grouting transformation range is determined; a grouting drill hole and a pressure reducing hole are constructed, and the slurry diffusion radius of the grouting drill hole is determined through the pressure reducing hole; determining the positions of other pressure reducing holes according to the slurry diffusion radius; grouting is started to be conducted in the grouting drill hole; after grouting is completed, the pressure reducing holes are treated; and repeating the processes until the transformation is finished. The grouting hole is formed in the center of the grouting transformation area, and the pressure reducing holes are formed in the periphery of the grouting hole, so that the water pressure of the aquifer is effectively reduced, the diffusion range of grout is remarkably expanded, and the grout is promoted to more uniformly permeate and fill cracks of the aquifer. The grouting efficiency is improved, material consumption is remarkably reduced, and the grouting method has high economic benefits and is particularly suitable for mine water prevention and control engineering under complex geological conditions. The grouting effect is greatly improved, and the technical scheme is efficient and economical.

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.

The embodiment of the invention provides a double-sweet-spot prediction method and prediction device for a geological reservoir, and the method comprises the steps: obtaining a plurality of to-be-analyzed regions according to the three-dimensional distribution information of a double-sweet-spot index of a target reservoir, and obtaining a fracturing crack propagation simulation result corresponding to the to-be-analyzed regions; based on an established three-dimensional geologic model of a target reservoir, according to distribution information of a water-bearing stratum and distribution information of a thin interlayer in the three-dimensional geologic model of the target reservoir, according to a fracturing fracture extension simulation result corresponding to a to-be-analyzed area, after it is determined that fracturing fractures in the to-be-analyzed area do not communicate with the water-bearing stratum and can penetrate through the thin interlayer, the fracturing fractures in the to-be-analyzed area are determined to be communicated with the water-bearing stratum. Marking the to-be-analyzed area as a double-dessert area; and traversing the plurality of to-be-analyzed areas of the target reservoir to obtain all double-sweet-spot areas so as to complete double-sweet-spot prediction of the target reservoir. According to the method, the distribution information of the complicated geological structures of the aquifer and the thin interlayer and the crack propagation characteristics are considered at the same time, so that the prediction precision of the double-dessert area is improved, and the economy of reservoir development is improved.

The invention belongs to the technical field of land subsidence monitoring and early warning, and relates to a land subsidence prediction method based on a three-dimensional monitoring net, which comprises the following steps: S1, generalizing a hydrogeological structure and quantifying the volume compression coefficient of each layer based on test data of a geological identification hole and observation data of an underground water level monitoring hole, a layered standard hole and a pore water pressure monitoring hole; s2, constructing a three-dimensional groundwater seepage model, and calculating groundwater level spatial distribution data of each aquifer; s3, fitting observation data of the underground water level monitoring hole with a calculation result, and inverting parameters in the three-dimensional underground water seepage model; and S4, operating the inverted groundwater seepage model to obtain groundwater level drawdown and pore water pressure difference spatial distribution data and the like of each water-bearing layer and each water-resisting layer. According to the land subsidence prediction method provided by the invention, the severity of land subsidence can be effectively, quickly and visually judged, the prediction result is high in precision, and land subsidence prediction caused by exploiting underground water at different depths is supported.

The invention provides an observation hole layered packing observation device and method for a layered water pumping test, and belongs to the technical field of hydrogeological exploration, in the observation hole layered packing observation device for the layered water pumping test, a mechanical packer unsealing mode is adopted, and compared with an air inflation and water filling unsealing mode, the observation hole layered packing observation device for the layered water pumping test is more stable and firmer; the geophysical prospecting logging device is adopted to automatically identify the position of the water-resisting layer, and then the power device of the earth surface controller and the track drill rod are adopted to automatically adjust the position of the underground (namely in the observation hole) packer based on the position of the water-resisting layer, so that the flexibility and the intelligence are good; the device can realize more accurate automatic positioning of the position of the packer, guarantees accurate packing observation of the observation hole in the layered water pumping test, and realizes more accurate and easy-to-operate layered packing observation of the observation hole with the same diameter.

The utility model relates to the technical field of underground water sampling, and discloses underground water sampling equipment with well washing and low-flow-rate sampling functions, which comprises an aquifer, a well wall arranged in the aquifer, a screen pipe fixedly connected to the inner wall of the well wall, a centrifugal pump arranged in the well wall, and a well washing pipe fixedly connected to an outlet of the centrifugal pump. According to the underground water sampling equipment with the well washing and low-flow-speed sampling functions, through the arranged cleaning mechanism, when impurities adhering to the outer side of a filter cylinder need to be cleaned, an inserting block can be moved out of the interior of a through opening, limiting is canceled, the filter cylinder can be pulled downwards, an inserting column is pulled out of the inner wall of an inserting base, and the filtering cylinder is pulled out; and similarly, the filter cartridge can be conveniently mounted under the action of the inclined surface of the insertion block, so that good mounting and dismounting efficiency can be achieved while cleaning is realized, the time consumed by workers is further saved, and the operation convenience of the device is improved.

The invention discloses a method for evaluating mining-induced water inrush and sand inrush dangerousness after grouting transformation of a loose aquifer, which specifically comprises the following steps of: firstly, obtaining hydrogeological characteristics and parameters before and after grouting of the loose aquifer, and evaluating a grouting transformation effect; the method comprises the steps that firstly, a working face geologic prototype is established, then a hydrogeological engineering geologic model after grouting of a research area is established in combination with the working face geologic prototype, then a water inrush source is determined based on physical simulation and numerical simulation test results of the geologic model, and a water inrush source criterion thematic map, a mining influence criterion thematic map and a water inrush channel criterion thematic map are established; and finally obtaining a danger contour map in the research area and carrying out area division. The mining influence, the water inrush source and the water inrush channel factors are considered, the corresponding criterion thematic maps are accumulated and summed to obtain the danger contour map in the research area, area division is performed, the mining water inrush and sand inrush danger after grouting of the unconsolidated aquifer can be accurately evaluated, and a basis is provided for safe mining of a coal mine.

The invention provides a method for reconstructing a grouting, water-retaining and water-resisting layer in a mining area and related equipment. Geophysical prospecting is carried out in a coal mining treatment area of a mining area from a water-bearing layer to a goaf, first apparent resistivity of all positions in a space is obtained, and the positions with the first apparent resistivity smaller than or equal to first preset resistivity in the space are selected to form a first dominant water guiding channel area; performing water flow direction testing on at least two monitoring wells in the coal mining treatment area to obtain a first flow direction fitting function of each monitoring well, and selecting two first flow direction fitting functions to calculate a first flow direction intersection point of the two corresponding monitoring wells; and when the first flow direction intersection point is located in the first dominant water guide channel area, grouting operation is conducted on the first dominant water guide channel area. The mining area grouting water-retaining and water-resisting layer reconstruction method and the related equipment provided by the invention are simple and convenient, grouting water retention can be quickly and accurately realized, the cost is low, and the loss of superficial water resources is effectively reduced.

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 provides an underground water level and conductivity accurate measurement system, which comprises an underground probe module, a three-core composite cable and a water level measurement module, the outside-well module is used for deploying a microprocessor, a serial communication bus and a lithium-thionyl chloride battery pack outside a well, and then correcting and initially presetting and calibrating acquired signals; the precise monitoring module is used for carrying out multi-stage filtering processing and final state estimation on the signals to obtain multi-channel fusion data; the misjudgment eliminating module is used for performing multi-layer measurement judgment and dynamic confirmation to obtain a real water level point; the model calculation module is used for carrying out water level inversion by utilizing a hydrological model to obtain hydrological parameters of a well hole and a water-bearing layer; and the data platform module is used for pushing, storing and visually displaying real-time data streams. The method can adapt to high-precision multi-parameter real-time monitoring under extremely complex well conditions, the recognition accuracy of underground water parameters such as the water level and the conductivity is greatly improved, the misjudgment risk is reduced, and accurate underground water level measurement is achieved.

The invention discloses a method and a device for identifying an underground water level threshold value corresponding to ground surface deformation. The method comprises the following steps: S1, acquiring underground water levels of different aquifer groups and PS point settlement rates; and S2, according to the underground water levels of the different aquifer groups and the PS point settlement rates, time-space response characteristics of water level changes of the different aquifer groups in multiple time periods and surface deformation are quantified, and response thresholds of the water level changes of the different aquifer groups to the surface deformation are identified. By the adoption of the technical scheme, the space-time response characteristics between underground water level changes and earth surface deformation of different aquifer groups are quantitatively analyzed, the underground water level threshold value is recognized, and a scientific basis is provided for regional land subsidence regulation and control.

The invention provides an underground water layered energy storage system and method, is applied to the technical field of energy utilization and is used for solving the technical problems of underground water extraction and irrigation imbalance and insufficient heat supply and exchange capacity. The method specifically comprises the following steps: determining a working mode of a mining and irrigation unit according to a mining and irrigation geographic position and mining and irrigation time; the mining and irrigation unit is controlled to conduct same-layer mining and irrigation through the aquifer corresponding to the working mode; wherein the heating mode corresponds to a far-surface aquifer, and the refrigeration mode corresponds to a near-surface aquifer; and when it is determined that the underground water layered energy storage system is in a preset system operation state according to the operation data, determining the water-containing layer in an idle state as a target water-containing layer, and controlling the mining and irrigation unit to perform different-layer mining and irrigation through the water-containing layer corresponding to the working mode and the target water-containing layer. In this way, in the heating mode, the underground water with the high temperature of the far-surface aquifer is used for heating, the heat supply and exchange capacity is improved, when the recharge efficiency is lower than the preset efficiency, the different-layer mining and irrigation mode is adopted, and underground water mining and irrigation unbalance is avoided.

The invention belongs to the technical field of strip mine dumping design and ecological restoration, and discloses a design method for a soil layer structure of an open pit coal mine dumping site in a western arid and semi-arid region. The invention aims to solve the problem of poor permeability of the viscous surface soil layer of the dumping site at present by optimizing the design of the soil layer structure of the open pit coal mine dumping site in the western arid and semi-arid region from bottom to top by taking low-cost industrial solid wastes as raw materials and designing a geologic structure of'water-resisting layer-water-bearing layer-surface soil layer '. And the later ecological reclamation of the waste dump is facilitated.

The invention provides a coal measure strata weathering zone aquifer water yield evaluation method, and particularly relates to the technical field of well field exploration. The method specifically comprises the following steps: S1, determining main evaluation indexes for evaluating the water yield property, and constructing an index system for evaluating the water yield property of the aquifer of the stratum weathering zone; s2, data quantification, standardization and normalization processing; s3, determining a subjective weight value and an objective weight value of each main evaluation index through an analytic hierarchy process and an entropy weight method; s4, drawing a water yield property single-factor partition map of each main evaluation index; s5, performing weighted combination on the subjective weight value and the objective weight value of each main evaluation index by using a linear method, and determining a comprehensive weight value of each main evaluation index; s6, constructing an evaluation model of the water yield strength of the aquifer of the to-be-studied area; and S7, based on the stratum weathering zone aquifer water yield property comprehensive partition map, carrying out water yield property evaluation. According to the method, the division grade of the water yield property of the weathering zone aquifer of the coal measure strata in the area range to be researched can be more intuitively evaluated.

The invention relates to the technical field of underground water quality monitoring, in particular to a drilling underground water quality real-time monitoring device which comprises a top sealing cylinder mounted at the top of a well, a plurality of automatic winches for hoisting blocking mechanisms, a plurality of blocking mechanisms for blocking the space in the well to form different interlayers and a sampling mechanism for sampling, the inner side wall of the top sealing cylinder is fixedly sleeved with a mounting plate. According to the device, the top sealing cylinder is arranged at the well mouth, then the multiple blocking mechanisms are started to block all positions of the well, the space between every two adjacent blocking mechanisms forms an interlayer, then the sampling mechanism is used for extracting water samples from water flow all positions of all the interlayers, then the water samples are detected, and therefore the water quality result is obtained; therefore, different interlayers can be arranged according to the depth change of the aquifer to align the aquifer with the changed depth, the sampling mechanism is used for sampling water flow at all positions of each interlayer, the occupied space is small, no isolating layer needs to be built, and the construction difficulty is reduced.

The invention discloses a coal mining water retention method, which comprises the following steps of: pre-calculating the height h0 of a water flowing fissure zone in a deep aquifer when the water yield Q2 of a coal mining mine is equal to the total water consumption Q1 of production and life of a mining area, and then calculating the corresponding mining height M0 when a coal seam below is mined according to the height h0 of the water flowing fissure zone; according to the mining height M0, the filling height M2 needing to be equivalently filled in the goaf is calculated, and materials are filled into the goaf behind along with advancing of the coal face during coal mining until the materials reach the height of M2, so that too high or too low development of the water flowing fissure zone can be inhibited, the filling height or thickness can be reduced, and the filling efficiency is improved. According to the method, the balance between the filling height of the goaf and the development height of the water flowing fractured zone is found in an equivalent filling mode, mine water generated during coal mining can meet the total water consumption of production and life of a mining area, the defects caused by complete filling can be avoided, the coal mining efficiency is improved, and the water retention effect is also improved.