593 results about "Aquifer" patented technology

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 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 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.

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 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 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 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.

The invention provides a coal mine roof sandstone water long directional hole and short straight hole combined drainage prevention and control method, and belongs to the technical field of coal mine water disaster prevention and control. The method comprises the following steps: finely exploring geological and hydrogeological conditions, obtaining hydrogeological characteristics of an aquifer, and calculating static reserves and dynamic replenishment; designing and constructing a long directional hole, and determining a track parameter and a drainage amount; short straight holes are designed and constructed, a low-resistance abnormal area is arranged in a densified mode, and the drainage amount and the drawdown are calculated; constructing a multi-objective optimization model, and determining an optimal drilling position combination; partition drainage control is conducted based on the optimization scheme, the drainage speed and flow are dynamically adjusted, and grouting plugging is conducted on the waterless drill hole; the water inflow is monitored, and the drainage effect is judged according to the attenuation rate. Safe and efficient drainage of roof sandstone water is achieved, the mine water disaster risk is effectively reduced, and safe production of a coal mine is guaranteed.

The invention provides a stratigraphic structure and ground pressure distribution detection method based on wave velocity tomography, and relates to the technical field of wave velocity tomography. The method comprises the following steps: firstly, arranging dense linear detector arrays in a monitoring area at an interval of 5m, and collecting the distribution condition of an aquifer, a lithology detection result and a drill core diagram of the monitoring area; recording seismic wave data, carrying out noise reduction processing on the seismic wave data, picking up arrival time, and associating the arrival time with a waveform event; performing path tracking on an observation result by adopting a wave velocity inversion algorithm, generating a wave velocity tomography image and substituting the wave velocity tomography image into the wave velocity-ground pressure evaluation model; and finally generating a ground pressure distribution diagram.

The invention provides a comprehensive advanced geological forecasting method for an ultra-deep vertical shaft of a metal mine, and belongs to the technical field of water prevention and control in construction of the ultra-deep vertical shaft of the metal mine. The conditions that a tectonic fracture zone, a high confined aquifer and the like possibly exist in the deep stratum, have construction hidden dangers and are prone to causing water burst disasters are accurately recognized, and the advanced detection precision of the deep stratum of the shaft is improved; meanwhile, a feedback forecasting process of geological analysis-geological modeling-geophysical prospecting circle target-drilling verification is formed, a multi-level verification system is constructed, the specific geological condition of an abnormal area is clearly detected, and the advanced positioning and judgment accuracy of a geological abnormal body in a deep stratum is remarkably improved; and by integrating and fusing multi-source geological information, the geological abnormal body information is comprehensively analyzed and judged, so that the requirements of deep rock mass mechanical property analysis and water inrush disaster prevention and control are met.

The invention discloses a zoned prevention and control method for damage of an underground water-preserved mining aquifer in a western ecologically fragile mining area, and relates to the technical field of coal mine water-preserved mining. The method comprises the following steps: an exploration stage: obtaining spatial distribution and physical and mechanical parameters of an aquifer, and dividing aquifer protection grades; in the planning stage, predicting the height of a water flowing fractured zone, determining mining parameters and dividing water-bearing stratum damage grades; in the mining stage, differentiated protection is carried out on the aquifer according to the aquifer protection grade and the damage grade; and a feedback stage: dynamically monitoring the water level, the height of the water flowing fractured zone and the water inflow, quantitatively evaluating the water retention effect and feeding back and optimizing mining parameters and protection measures to form a closed-loop control system. According to the method, a full-period closed-loop technical chain of exploration-planning-mining-feedback is constructed, the heterogeneity characteristics of the damage space of the aquifer are fused, a differentiation regulation and control mechanism based on damage grade zoning is established, and dual-target dynamic balance of coal resource mining and underground water system protection is achieved through space-time collaborative optimization.

The invention discloses an application system of an EH4 audio magnetotelluric method in hydrogeological survey, and belongs to the field of geological survey. Comprising a multi-band signal fusion module, an intelligent data processing and interpretation module, a dynamic detection and real-time feedback module, a deep hydrological detection and extreme environment adaptation module, and a multi-dimensional space detection module fusing GIS and unmanned aerial vehicle technologies. The multi-band signal fusion module integrates low-frequency and high-frequency signal sources and has a dynamic frequency switching function; according to the invention, through multi-frequency-band signal fusion, the detection depth of a deep hydrogeological layer is significantly improved, deeper-level underground hydrological information can be obtained, and powerful support is provided for deep water resource exploration and development; according to the intelligent data processing and interpretation technology, data errors are effectively reduced, the accuracy of judging the hydrogeological conditions such as the underground water level and the aquifer distribution is improved, and a more reliable data basis is provided for water resource management and utilization.

The invention provides a digital twinning-based hillock aquifer well group collaborative precipitation simulation method and system, and relates to the technical field of digital twinning, and the method comprises the steps: constructing an aquifer digital twinning model, carrying out virtual precipitation deduction, obtaining a water level spatio-temporal evolution field, and recognizing a hydraulic coupling region. And according to the water level gradient distribution and the flow field deflection direction, the well group water pumping intensity is cooperatively regulated and controlled, and the optimal water pumping scheme is determined. The well group dewatering efficiency can be effectively improved, the overall water level of the aquifer is evenly lowered, and the engineering cost is reduced.

The invention relates to the technical field of geological modeling, and discloses an underground reservoir three-dimensional geological model construction method and system. The method comprises the following steps: screening drilling data through a preset precision threshold value, correcting topographic data by using a first precision drilling data set to generate a topographic surface model, reversely calibrating a second precision drilling hole, and establishing a multivariate data fusion mechanism; layering standardization is achieved in combination with sedimentary cycle characteristics, aquifer units are automatically divided, and stratum lithology codes are compiled; a three-dimensional model is generated by adopting an implicit modeling method based on modeling boundary constraints, and the model precision is verified through a profile comparison method and a leave-one-out method; and converting the adjusted geological section into a three-dimensional constraint surface to drive the generation of a virtual drill hole so as to realize incremental updating of the three-dimensional geological model. According to the method, the spatial precision of the terrain surface model is remarkably improved, the problem of non-uniform reference of multivariate heterogeneous data is solved, the reliability and accuracy of model construction are improved, the virtual drilling data set is generated, the data are dynamically modeled, and the dynamic updating of the model is realized.

The invention belongs to the field of pollution traceability, and particularly relates to a karst landform soil and groundwater collaborative heavy metal pollution traceability method, which comprises the steps of end member site selection, groundwater monitoring point arrangement, collection and measurement of feature identification of each end member and multi-end member hybrid modeling. According to the scheme, the number of karst funnels is counted through neural network segmentation, high, medium and low density areas are divided, intelligent partition extraction of end members is achieved through a random forest model, monitoring points are arranged in the flow direction in a layered mode in combination with funnel distribution and an aquifer structure, and the problems that the pollution diffusion rule is difficult to capture and pollution source positioning is fuzzy under heterogeneity are solved; a three-dimensional monitoring network of soil, water quality and geology is constructed, a Bayesian mixture model is combined with an isotope fractionation effect to quantify an end member contribution proportion, the defect that traditional monitoring and modeling are not adaptive to karst heterogeneity is compensated, and pollution spatial and temporal distribution and migration paths are captured; unification of accurate simulation of the pollution diffusion rule and quantification of the end member contribution proportion is realized.

The disclosure relates to methods for determining an amount of seawater, an amount of aquifer water, and an amount of original reservoir water in a produced water sample using oxygen and hydrogen isotope ratios. An 18O / 16O ratio (δ18O) and a D / H ratio (δD) are measured for a seawater sample, an aquifer water sample, and an original reservoir water sample and are used to make a mixing model. δ18O and δD are measured in a produced water sample and the mixing model can be used to determine the amounts of each constituent in the produced water sample.

The invention discloses a closed pit mine water pollution four-water conjugate cooperative monitoring and early warning method and system, and relates to the technical field of water quality analysis, and the method comprises the following steps: collecting water level and water quality data of corresponding positions of atmospheric precipitation, surface water, underground water aquifer and goaf ponding; performing format standardization, exception elimination, deletion processing and space-time alignment on the monitoring data, and constructing a four-water monitoring space-time data set; a four-water conjugate coupling analysis and prediction model is established, after training is completed based on historical monitoring data, the water level and water quality of each monitoring point are predicted, and pollution transmission paths and pollution lag characteristics among four types of water bodies are identified; and performing over-threshold judgment by combining the monitoring index and the early warning threshold, and outputting graded early warning and intervention regulation and control suggestions. According to the technical scheme of the invention, four-water integrated dynamic monitoring, pollution evolution rule identification and prospective early warning of the closed pit mine are realized, and the water pollution risk management and control precision and response efficiency are improved.

The invention provides a fine detection system and method for a relative aquifer section of an aquifer based on passive distributed sound wave sensing, and a distributed sound wave data collection subsystem is used for collecting hydrodynamic sound wave signals of water from the ground to a straight-through drainage drill hole. The armored optical cable laying device is used for ensuring that the armored logging optical cable is accurately laid to the preset depth of the drill hole and recording the lowering depth of the armored logging optical cable. The test sleeve subsystem is used for obtaining hydrodynamic information through dynamic sound waves generated by water flow. The flow control and measurement device is used for controlling and monitoring the total flow of the straight-through drainage drill hole. According to the hydrogeological parameter testing system and method, hydrodynamic sound waves generated by outflow of water in the straight-through drainage drill hole are analyzed, the frequency and energy distribution characteristics of sound wave signals are utilized, a correlation model with the stratum flow is established, and the hydrogeological parameter testing system and method which can provide high resolution, high efficiency and high precision are achieved.

The invention relates to the technical field of coal mines, in particular to an underground high-confined aquifer area treatment method which comprises the following steps: S1, performing underground directional drilling treatment, layering a high-confined aquifer according to the thickness and rich water distribution characteristics of the high-confined aquifer, and constructing a plurality of main directional drill holes in a directional drill site, then a plurality of branch directional drill holes extend from the same layer or different layers of each main directional drill hole to the plane direction of the treatment area from the directional drill site, and a grouting channel is formed; s2, grouting is conducted on the directional drill hole; and S3, underground common drill verification is carried out, and the treatment effect is checked through common drill holes which are arranged in parallel at equal intervals. Compared with a common drilling treatment working face, average construction drilling holes are greatly reduced, casing pipes and cement materials can be saved, the moving frequency and construction time of a drilling machine are reduced, and manpower and material resources are reduced.

The invention discloses an underground water flow field simulation method, an underground water flow field simulation device, underground water flow field simulation equipment and a computer readable storage medium, and the method comprises the steps: carrying out the collection of multi-source geological data based on drilling basic information, a digital elevation model and a hydrogeological map, and obtaining the multi-source geological data; constructing a three-dimensional geological model based on the multi-source geological data to obtain a three-dimensional geological entity model; performing aquifer recognition based on the profile information of the three-dimensional geological entity model to obtain aquifer spatial distribution; performing groundwater flow field analysis based on the aquifer spatial distribution to obtain groundwater flow field data; and performing model construction based on the groundwater flow field data to obtain a groundwater flow field model. The integrated simulation method for fine description of stratums, automatic identification of aquifers, flow field feature analysis and comprehensive evaluation of thermal reservoirs is realized, so that the precision and efficiency of geothermal resource exploration evaluation are improved.

The invention discloses an analysis method and system for water pumping data of an aquifer, and relates to the technical field of intelligent water system regulation and control, and the method comprises the steps: collecting water pumping data, and carrying out the preprocessing to obtain a standard input sequence; an LSTM prediction model is constructed, and improvement is carried out in combination with an attention mechanism; updating parameters of the LSTM prediction model by using a physical constraint introduced loss function, and outputting predicted water level data; and using a reinforcement learning algorithm to optimize a water pumping strategy according to the water pumping data and the predicted water level data. According to the method, a state vector containing the current actual water level, the water pumping amount and the environment variable is constructed, so that the RL algorithm dynamically regulates and controls the water pumping operation according to the prospective information. Value learning is carried out on actions by utilizing a deep Q network, and closed-loop collaborative updating of a prediction model and a decision network is realized through joint loss in an online operation process, so that the intelligent level of a water pumping strategy is effectively improved, the risk of too low water level is avoided, and the overall operation efficiency is optimized.

The invention discloses an intelligent ecological water resource management system, and the system comprises a sensing layer which is responsible for the collection and preprocessing of multi-source heterogeneous data, and is connected with satellite remote sensing, an unmanned plane LiDAR, a ground sensor, and social media public opinion data; the transmission layer is responsible for data transmission and exchange; the data layer adopts a neural radiation field, loads basin terrain / land utilization GIS data, injects real-time meteorological data to drive hydrological process simulation, constructs a dynamic digital twinborn body, embeds a human activity agent to simulate the influence of different governance policies, selects a variable order fractional derivative kernel function according to a medium fractal dimension, and obtains a variable order fractional derivative kernel function; calculating a migration path of the pollutant in the multi-layer heterogeneous aquifer, simulating an abnormal diffusion process of the pollutant in a heterogeneous medium, and generating diffusion field data; and the application layer is used for generating pollution propagation synthetic data covering long-tail distribution and water quality recovery paths under different treatment policies, and calculating profit and loss distribution of different schemes to upstream and downstream stakeholders.

The invention relates to the technical field of unsealing of bad drill holes caused by hidden disasters of mines, and discloses a sealing and grouting device and method for sealing a confined aquifer of a bad drill hole, the sealing and grouting device comprises an inner barrel, the outer part of the inner barrel is sleeved with a left-hand thread sleeve, the outer part of the left-hand thread sleeve is in threaded connection with an outer barrel, and the inner barrel is slidably inserted into the outer barrel; the inner barrel comprises an upper connecting coupling, a six-edge short section, an inner barrel upper limiting step, an upper packing rubber barrel inner barrel liquid inlet hole, an inner barrel grouting hole and a lower packing rubber barrel inner barrel liquid inlet hole. The outer barrel comprises a left-hand female buckle, an upper packing rubber barrel and a lower packing rubber barrel are installed on the outer wall of the outer barrel, and an upper packing rubber barrel liquid inlet one-way valve is installed on the barrel wall of the outer barrel. According to the method, grouting plugging is conducted on the target confined water layer, the outer cylinder is reserved in the hole to seal the target confined water layer, then the grouting pipe string is put down to conduct grouting on the whole shaft, triple isolation plugging of water layer grouting, outer cylinder sealing and internal grouting on the target confined water layer is achieved, and the water layer plugging effect is improved.

The utility model relates to a water level observation well structure which comprises an observation hole, a well casing and a gravel filling layer. The well pipe is arranged on the inner side of the observation hole, the well pipe penetrates through one or more than two upper confined aquifers, the bottom of the well pipe is located in the bottom confined aquifer, the well pipe is provided with a perforated pipe wall corresponding to the upper confined aquifers, the perforated pipe wall is provided with water permeable holes, the bottom of the perforated pipe wall is provided with a bottom plate, and the bottom plate is connected with a partition plate extending upwards; the gravel filling layer comprises an upper gravel filling layer and a lower gravel filling layer, the upper gravel filling layer is arranged between the partition plate and the perforated pipe wall, and the lower gravel filling layer is arranged below the opening in the bottom of the well pipe. Compared with the prior art, the water level elevation and confined water head measurement can be carried out on two or more confined aquifers in one observation hole.

The invention discloses a method for identifying a layered boundary based on fuzzy clustering and a centimeter-scale water injection test profile, and belongs to the technical field of underground water science and technology, and the method comprises the following steps: S1, screening centimeter-scale water injection test profile data; s2, performing fuzzy clustering analysis on the water injection pressure profile data; s3, data grouping iterative optimization is carried out; s4, hierarchical combination is carried out according to the identification result, and a hierarchical boundary is obtained; on the basis of centimeter-scale water injection test profile data, a fuzzy clustering analysis method is adopted, a clustering center is defined, and part of member relations of each observation value in each water injection test profile in the clustering process are analyzed, so that a good clustering number is found out, automatic layering of vertical change profile data is realized, and the clustering accuracy is improved. And the uncertainty of the aquifer model caused by inaccurate boundary identification is reduced.

The invention discloses an in-situ water-preserved mining method for a high-salt high-pressure-bearing bottom plate aquifer, and relates to the technical field of coal mining. The method comprises the steps that the damage depth of a bottom plate, the height of a confined water guide rising zone and the thickness of a minimum safe water-resisting layer are calculated according to geological and mining technical parameters; adjusting according to a preset water-preserved mining condition to enable the working face to meet the water-preserved mining condition; calculating to obtain the grouting thickness of the corrosion-resistant material; corrosion-resistant acrylate grouting liquid is injected from the upper edge of the confined water guide rising zone according to the grouting thickness of the corrosion-resistant material; monitoring the water pressure of a bottom plate aquifer and the height of a confined water guiding and rising zone, and when a preset risk condition is exceeded, determining that the working face has a water-preserved mining failure risk, and performing risk early warning; and when risk early warning occurs, secondary grouting is carried out according to the grouting thickness of the corrosion-resistant material. A chemical corrosion resistant acrylate grouting liquid is injected into the upper edge of a confined water guiding and rising zone, and gradual corrosion damage and bottom plate water inrush of a rock stratum under the action of high-salinity and high-confined water are prevented.

The invention relates to an in-hole transient electromagnetic response characteristic numerical simulation method based on a tunnel three-dimensional geoelectric model and an absorption boundary finite element method, and belongs to the technical field of geophysical exploration. The method comprises the following steps: constructing a tunnel full-space three-dimensional conductivity model; based on a Maxwell equation set, a vector potential and a scalar potential are introduced, a vector control equation of a transient electromagnetic field is derived in combination with Coulomb specifications, first-order absorption boundary conditions are established, and a weak form finite element equation is derived through a Galerkin weighted margin method; generating a global sparse matrix by utilizing spatial discretization and unstructured grid division, and performing iterative solution on the dynamic electromagnetic field by adopting a Newmark time discretization method; and simulating the transient electromagnetic response of geological anomalous bodies with different resistivity and the distance between the geological anomalous bodies and the receiving coil, and analyzing the attenuation characteristic and the geometric gravity center effect to obtain an electromagnetic response rule. The device can accurately simulate the electromagnetic response of abnormal bodies such as aquifers and faults in front of a tunnel face and around drill holes.

The invention discloses a reservoir bank soil hydro-fluctuation belt degradation channel detection method, which can accurately construct a three-dimensional resistivity distribution model of an underground soil body through potential response feedback and resistivity tomography technologies, and provides underground structure information with higher resolution than that of a traditional method. And particularly, the depth limitation of a traditional method in reservoir bank hydro-fluctuation belt deep detection is broken through. In combination with the relation between the resistivity distribution and the hydraulic parameters such as the permeability coefficient, the method not only can accurately identify the distribution of the underground aquifer, but also can effectively position the latent and pre-development degradation channels and analyze the evolution trend of the channels, thereby providing a scientific basis for reservoir bank stability analysis and disaster early warning. Besides, a potential exploratory well is drilled in a detection area and current is applied to collect potential response data, so that complex drilling and excavation operations in traditional exploration are avoided, and high-precision detection can be completed under the condition that the underground environment is not disturbed on a large scale.

The invention relates to the technical field of hydrogeological exploration, and discloses a same-hole different-diameter water pumping test device for multi-aquifer hydraulic connection exploration, the same-hole different-diameter water pumping test device comprises a shell and a detector, the detector is hung in the shell, the upper side of the shell is internally provided with a water inlet, and the shell is internally provided with a buckle mechanism; the buckle mechanism comprises a fixing plate, an extrusion ring is connected to the outer portion of the fixing plate in a clamped mode, a connecting pipe is fixedly connected to the interior of the extrusion ring, a clamping groove is formed in the extrusion ring, a rotating column is rotationally connected to the interior of the fixing plate, a clamping plate is fixedly connected to the outer portion of the rotating column, and a first spring is arranged on the upper surface of the clamping plate. A second spring is arranged on the lower surface of the clamping plate. The buckling mechanism is not affected by moisture, fixing failure or device damage caused by environmental change of the water absorption expansion material is avoided, firm and stable connection between the extrusion ring and the shell is ensured, and the reliability of hydraulic connection exploration data of multiple aquifers is improved.