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Phreatic is a term used in hydrology to refer to aquifers, in speleology to refer to cave passages, and in volcanology to refer to eruption type.
Underground water phreatic water evaporation measuring system and method based on internet of things technology
PendingCN107179260AReduce experimental workloadHigh measurement accuracyWeighing by removing componentSoil scienceThe Internet
The invention discloses an underground water phreatic water evaporation measuring system and method based on an internet of things technology. The phreatic water evaporation measuring system comprises a Mariotte bottle, a lifting machine, a soil column, a gravity sensor, evaporation strength control equipment, a data collecting and transmitting device and terminal equipment. The phreatic water evaporation measuring system based on the internet of things technology disclosed by the invention achieves automatic recording, transmission and checking at any time of experiment data and greatly reduces experiment work amount; a high-accuracy sensor in the phreatic water evaporation automatic measuring system improves measuring accuracy; by means of taking effects of underground water mineralization degree on phreatic water evaporation into consideration, a phreatic water evaporation model is further corrected, and the phreatic water evaporation model is more suitable for an evaporation process of phreatic water in an area where underground water mineralization degree is higher. The system disclosed by the invention can simulate effects of different underground water levels, evaporation strengths and underground water mineralization degrees on phreatic water evaporation and is suitable for phreatic water evaporation of stratified soil and homogeneous soil.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Simulation test system for hydrodynamic induced collapse catastrophe evolution of covered karst area
The invention provides a simulation test system for the hydrodynamic induced collapse catastrophe evolution of a covered karst area. The simulation test system for the hydrodynamic induced collapse catastrophe evolution of a covered karst area comprises a main body test system, a water level and a rainfall control system and a monitoring and supervising system. A soil sample is filled with the main body test system to simulate the geologic structures of the unconfined aquifer and the confined aquifer; the water level and the rainfall control system simulate the water level change and the rainfall change through water supply, water level change and rainfall of a soil sample in a main body soil box and a soil sample in a karst funnel hollow box; and the monitoring and supervising system records the changes and the collapse catastrophe evolution process of the soil samples under different water levels and different rainfall conditions. The simulation test system for the hydrodynamic induced collapse catastrophe evolution of a covered karst area completely presents the field geological characteristics and the induced collapse influence factor loading effect of the covered karst area.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
Simulation device for covered karst collapse caused by water level fluctuation
ActiveCN113823166ADoes not affect the test processImprove work efficiencyEducational modelsHydrometryConfined water
The invention discloses a simulation device for covered karst collapse caused by water level fluctuation, and relates to the technical field of hydrogeology. The device comprises a simulation unit, the internal space of a test box body of the simulation unit is divided into a diving simulation area, a confined water simulation area and a filtering area by a first partition plate and a second partition plate, a soil body is arranged in the diving simulation area, and a karst cave simulation hole is formed in the first partition plate. A seepage cylinder coaxial with the karst cave simulation hole is arranged on the first partition plate, a first water leakage hole and a second water leakage hole are formed in the positions, located in the confined water simulation area and the filtering area, of the side wall of the seepage cylinder respectively, a piston is arranged in the seepage cylinder, and the piston sequentially comprises a plugging ring and a plugging plate from top to bottom, and a connecting rod is arranged between the plugging ring and the plugging plate. The device can be used for collecting the dropped soil body caused by each water level fluctuation, so that the development process of karst collapse is quantitatively analyzed and judged.
Owner:山东省地质矿产勘查开发局第五地质大队 +1
Method for calculating historical spatial information of high-water-level coal mining subsidence ponding area
PendingCN113836740ALow costImprove accuracyDesign optimisation/simulationSpecial data processing applicationsGround subsidenceTerrain
A spatial information calculation method, a remote sensing method and subsidence prediction are combined; on the one hand, the remote sensing method is used for extracting the ponding boundary of a remote sensing image of a research area; on the other hand, working face prediction parameters and geological mining conditions are used for predicting the ground subsidence basin terrain through a probability integral method. The ponding boundary extracted by the remote sensing image is matched with the predicted subsidence terrain through coordinates, the water level elevation of the ponding area is determined, various spatial information such as the water depth of the subsidence ponding area, the underwater terrain, the ponding area, the ponding volume and the reservoir capacity of the subsidence area are calculated, and an underwater topographic map is drawn. Compared with a traditional subsidence area ponding space information obtaining method, the method is convenient and rapid, high in result precision, capable of calculating past ponding space information data, capable of providing reliable data support for coal mining subsidence area treatment, capable of improving the utilization value of water and soil resources of the coal mining subsidence area, capable of improving the ecological environment of the coal mining subsidence area, and capable of relieving the human-ground contradiction in the coal mining subsidence area.
Owner:ANHUI UNIVERSITY
Rapid assessment method for seawater intrusion and sustainable freshwater exploitation in phreatic aquifer considering hydraulic boundary change
ActiveCN119670629AGuaranteed accuracyImprove evaluation accuracyDesign optimisation/simulationComplex mathematical operationsEnvironmental engineeringHydrology
The invention discloses a rapid assessment method for seawater intrusion and sustainable freshwater exploitation in an phreatic aquifer considering hydraulic boundary changes. The method comprises the following steps: constructing a conceptual model based on specific working conditions; potential energy distribution in the phreatic aquifer is calculated; the seawater intrusion range is determined by searching an equipotential line equal to potential energy at a salt toe position in a potential energy field through interpolation and the height of a salt-fresh water interface; and calculating the sustainable fresh water exploitation rate: calculating the stagnation point position, wherein the water pumping rate when the stagnation point coincides with the salt toe position is the sustainable fresh water exploitation rate. According to the method, the evaluation precision and calculation efficiency of the seawater invasion range and the sustainable fresh water exploitation rate can be remarkably improved while the result accuracy is ensured; by adopting the conceptual model based on the working condition, the research area range and parameter setting can be flexibly adjusted according to actual requirements, and by optimizing the calculation model, the requirements of calculation resources and manpower and material resources are remarkably reduced under the condition that additional equipment or resource investment is not increased.
Owner:HOHAI UNIV
Simulation device and simulation method for fur-bailey submersible well flow
The invention discloses a simulation device for fur-bailey submersible well flow. The device comprises a seepage groove, a simulation river channel, a water supply device and a pressure measuring device, and the seepage groove is of a fan-shaped structure. The invention further provides a simulation method for the fur-bailey submersible well flow. The simulation method comprises the following steps: filling the fan-shaped seepage groove with uniform sand; opening a submersible pump and a water supply valve, and exhausting air existing in the seepage groove and the pressure measuring device ina repeated water saturation mode; and closing the submersible pump and the water supply valve, and reading the pressure measuring water head value of each manometer observation hole through a pressuremeasuring tube plate. The simulation device is low in cost, good in visual effect and capable of conveniently mastering the movement process of the fur-bailey submersible well flow and obtaining hydrological geological parameters through water level data.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)
Method for predicting influence of diving rainfall on building settlement
ActiveCN112836270AReduce the impact of settlementReduce the impactGeometric CADSpecial data processing applicationsGround subsidenceStructural engineering
The invention discloses a method for predicting the influence of diving rainfall on building settlement, and belongs to the technical field of construction safety management, and the method comprises the following steps: S1, surveying the geology; S2, understanding surrounding buildings; S3, carrying out a water pumping test; S4, reasonably arranging well points; S5, determining a foundation pit dewatering scheme; S6, determining a seepage calculation model; S7, selecting one area of the engineering field area to carry out water level drawdown simulation; S8, measuring the elevation of the field working base point of the simulation area; S9, substituting related parameters by adopting a formula based on an effective stress principle to calculate the ground subsidence distribution of the surrounding buildings of the phreatic bed in the simulation area; and S10, guiding foundation pit dewatering and support design construction according to a calculation result. Water level drawdown simulation is carried out by setting a simulation area, foundation pit dewatering and support design construction are guided according to a calculation result, effective protection measures are taken, and the influence of foundation pit dewatering on surrounding buildings is reduced.
Owner:中国建设基础设施有限公司 +3
Calculation method for bare land rain day phreatic water evaporation
PendingCN110955977AHigh precisionUncovering the Effects of Diving EvaporationDesign optimisation/simulationCAD numerical modellingAtmospheric sciencesRainout
The invention relates to a calculation method of bare land rain day phreatic water evaporation. The calculation method comprises the following steps: establishing a rain-free day diving phreatic waterevaporation calculation model, further calculating a phreatic water evaporation reduction calculation model, and finally proposing a rain day phreatic water evaporation calculation model. The precision of the phreatic water evaporation calculation model established by distinguishing the rain day and the rain-free day is higher, and meanwhile, the influence of rainfall capacity and rainfall duration on phreatic water evaporation is revealed. The calculation method can improve the calculation precision of phreatic water evaporation, and provides technical support for researching the influence of rainfall on phreatic water evaporation.
Owner:安徽省(水利部淮河水利委员会)水利科学研究院(安徽省水利工程质量检测中心站)
Calculation method for quickly determining phreatic water level fluctuation characteristics
ActiveCN110990762AQuickly identify volatility characteristicsClimate change adaptationMachines/enginesCorrelation coefficientLinear correlation
The invention discloses a calculation method for quickly determining phreatic water level fluctuation characteristics. The calculation method comprises the following steps: determining a target analysis area of phreatic water level fluctuation characteristics; collecting rainfall data and phreatic water level monitoring well actual measurement data in an administrative region where the target analysis region is located; constructing a coordinate system; drawing a point diagram on a coordinate system according to the collected sum; carrying out linear correlation analysis on the drawn point graph to obtain a linear correlation linear equation; calculating a correlation coefficient R of the linear correlation linear equation to verify whether the linear correlation linear equation is established or not; and determining the submersible water level burial depth or elevation of the target analysis area by utilizing the linear correlation linear equation and the rainfall data of the target analysis area so as to analyze the submersible water level fluctuation characteristics of the target analysis area. The method has the advantages that the fluctuation characteristics of the phreatic water level can be quickly determined, and a basis is provided for evaluating migration of pollutants in underground water and investigating the environment of a polluted site.
Owner:SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST
Multi-aquifer communicated stratum foundation pit deep and shallow well dewatering construction method
The invention discloses a deep and shallow well dewatering construction method for a multi-aquifer communicated stratum foundation pit. In order to solve the problems of sedimentation outside a pit and wall deformation caused by one-time pumping and descending of a traditional mixed well, a shallow well with a filter screen located in a phreatic layer and a deep well extending to a confined aquifer are arranged in a foundation pit in the construction method; measuring and setting out, exploring and digging, hole forming, hole cleaning and slurry changing, well pipe descending, filling, water stopping and well washing are sequentially completed, and then an independent pumping and descending system is formed; water level, water quantity and peripheral deformation data are obtained through a single well-group well test, and a deep well starting threshold value is determined; before the foundation pit is excavated, only a shallow well is started to drain a phreatic bed, deep well pressure reduction is started in an echelon mode after the foundation pit is excavated to the preset depth and a support is erected, and on-demand dewatering is achieved; the bottom plate construction stage is divided into three stages for well shut-in. The construction method can obviously reduce the drop amplitude of the water level outside the pit, the lateral displacement of the wall body and the ground surface settlement, has the advantages of safety, economy and environmental protection, and is suitable for coastal complex geology deep foundation pit engineering.
Owner:CHINA RAILWAY BEIJING ENG GRP CO LTD +1
Mining area water flowing fractured zone top boundary blocking and water reducing method for preventing fracture reexpansion
The invention discloses a mining area water diversion fissure zone top boundary blocking and water reducing method for preventing fissure reexpansion, which comprises the following steps: determining a grouting water interception and emission reduction treatment area of a mining area, judging the type of a water diversion fissure, and taking an upward opening fissure and a closed fissure as grouting areas; the method comprises the following steps: based on the constraint of a critical range of safe compressive strength of a consolidation body of grouting pressure and grouting liquid, on the basis of determining development characteristics of the water flowing fractures and a target grouting range, performing grouting plugging on a weathered bedrock layer where the top boundary of the water flowing fractured zone is located, by means of the method, exploring channel seam searching-filling plugging-stable water-resisting layer rebuilding is achieved, so that slurry leakage is reduced, the grouting cost is reduced, and the conditions of water guiding fracture reexpansion and loose phreatic aquifer water loss are effectively restrained; the technical problems that secondary damage is caused to overlying strata of a coal seam roof and the water plugging effect is poor due to the fact that in a crack plugging method in the prior art, the grouting pressure and the specific gravity of grout are difficult to grasp are solved.
Owner:XIAN RES INST OF CHINA COAL TECH & ENG GRP CORP
A satellite-gravity collaborative forward modeling method for monitoring changes in confined water reserves
The present invention discloses a satellite gravity collaborative forward simulation method for monitoring changes in confined water reserves, which comprises the following steps: S1: obtaining boundary and longitude and latitude information of a preset study area, and determining the boundary and longitude and latitude information of a preset background area according to a range that may be affected by an error; S2: obtaining monthly-scale monitoring well water level data, empirical values of water supply degree in the background area, GRACE / GRACE-FO monthly-scale gravity satellite time-varying gravity field data, and non-groundwater component data based on the boundary and longitude and latitude information of the preset background area; S3: obtaining a monthly time series of groundwater reserve changes containing leakage errors; S4: obtaining a monthly time series of phreatic water reserve changes; S5: obtaining a monthly time series of confined water reserve changes on a 0.5° grid containing leakage errors; S6: running a preset iterative forward simulation algorithm; and S7: obtaining a corrected monthly time series of confined water reserve changes in the preset study area.
Owner:CAPITAL NORMAL UNIVERSITY
Method for comprehensively configuring mountain, river, forest, field, lake and grassland in eolian sand zone by considering mining subsidence
InactiveCN110876290AEcological environment improvement and promotionOptimize the allocation of ecological elementsClimate change adaptationSoil-working methodsEcological environmentSoil science
The invention discloses a method for comprehensively configuring mountain, river, forest, field, lake and grassland in an eolian sand zone by considering mining subsidence; the method is characterizedby firstly, constructing a related element relationship of a mountain-river-forest-field-lake-grassland life community in the aeolian sand zone based on a niche theory; secondly, comprehensively configuring mountain, river, forest, field, lake and grassland in the eolian sand zone under mining subsidence, to be specific, (1) predicting the influence of mining subsidence on terrain, and (2) predicting the influence of mining subsidence on underground phreatic level; and carrying out the following specific steps of (1) transplanting trees, (2) stripping and utilizing a soil seed bank, (3) pretreating sunken wetlands, (4) restoring vegetation, and (5) developing arable lands. According to the method, distribution law of mining subsidence in the aeolian sand zone is taken as basis, the nichetheory is taken as guidance, the desertification control is taken as a purpose, the ecological elements of mountain, river, forest, field, lake and grassland in the control zone are optimally configured, and the improvement and promotion on the ecological environment of a coal mining subsidence land in the aeolian sand zone are enhanced. The method is applicable to the treatment of damaged lands caused by coal seam mining of Salawusu formation aquifers on the surface in Maowusu sandy land regions in northern Shaanxi.
Owner:XIAN UNIV OF SCI & TECH
Plant root irrigation method in coal mining subsidence area
The application provides a coal mining subsidence area plant root irrigation method, which comprises the following steps: obtaining a buried depth parameter of a phreatic aquifer in a coal mining subsidence area, determining an irrigation depth according to the buried depth parameter of the phreatic aquifer; determining an irrigation influence radius; determining a drilling scheme in the phreatic aquifer according to the irrigation depth, the irrigation influence radius and the terrain undulation of the coal mining subsidence area, and obtaining a directional drilling according to the drilling scheme; and penetrating an irrigation pipeline into the directional drilling, and performing irrigation through the irrigation pipeline. Through the technical scheme provided in the application, the problem that the artificial irrigation mode in the related art cannot meet the irrigation requirement can be solved.
Owner:SHENHUA SHENDONG COAL GRP +1
Multi-element dynamic monitoring method and system for mine water of closed-pit mine in karst area
The invention discloses a multi-element dynamic monitoring method and system for mine water of a closed-pit mine in a karst area, and the method comprises the steps: arranging an observation well in a preset goaf range, and collecting goaf water accumulation data and phreatic bed data through a water level observation meter; rainfall information is obtained through a rainfall monitoring station, and surface water data is collected through a water level observation meter; comprehensively processing the rainfall information, the phreatic bed data, the goaf ponding data and the surface water data to obtain a synchronization and lag relationship of the phreatic bed data, the goaf ponding data and the surface water data caused by changes of the rainfall information; and predicting the goaf water accumulation data according to the synchronization and lag relationship, and sending out warning information when a prediction result exceeds a preset safety height. According to the technical scheme, a reliable and detailed basis is provided for treating the ecological water environment, possible mine water disasters and pollution are monitored and pre-warned, and the capacity of coping with the disasters is improved.
Owner:HYDROGEOLOGY BUREAU OF CHINA COAL GEOLOGY ADMINISTRATION +1
Multifunctional underground well structure
The utility model relates to the technical field of underground well structures, in particular to a multifunctional underground well structure, which is characterized in that a pipe body of an underground well device is provided with a second water-resisting layer used for isolating a phreatic aquifer from a confined aquifer, and the upper end and the lower end of the second water-resisting layer are provided with water filtering layers used for filtering and collecting underground water in a stratum; the outer side of the water filtering layer is provided with a dense-mesh screen used for being matched with the water filtering layer to filter and collect underground water in the stratum. The well pipe is provided with a water filtering pipe of a water filtering layer in the range of the diving and confined water aquifer; meanwhile, a well pipe is arranged in the second water-resisting layer, two water-stopping steel plates are arranged in the well pipe, and a water-stopping material is filled in the range of the outer water-resisting layer and used for separating the hydraulic connection between the upper water-bearing layer and the lower water-bearing layer; a first hole, a second hole and a third hole are formed in each layer of water stop steel plate, and a layered observation device and a recharge device are matched, so that the function of layered observation or recharge of multiple layers of underground water is achieved.
Owner:SHANGHAI CHANGKAI GEOTECHN ENG
Prediction method and system for ecological water level variation under coal mining in ecologically fragile areas
ActiveCN116227710BClimate change adaptationForecastingEnvironmental resource managementEnvironmental engineering
The present invention belongs to the technical field of green mining, and provides a method and system for predicting the degree of ecological water level variation under coal seam mining in ecologically fragile areas. The present invention first determines the thickness of the effective aquiclude of overburden after coal seam mining through data related to mine engineering geological conditions, hydrogeological conditions, and coal seam mining conditions in ecologically fragile areas; then, according to the thickness of the effective aquiclude of overburden after coal seam mining, three types of ecological groundwater leakage caused by coal seam mining are proposed, and their leakage states are determined; finally, on the basis of establishing a well flow model under different ecological groundwater leakage states, the ecological water level drawdown in a virtual water injection process is calculated, and the degree of ecological water level variation under different ecological groundwater leakage states is predicted; the method of on-site geological drilling water level monitoring is avoided, and a comprehensive prediction of the degree of ecological water level variation under coal seam mining in ecologically fragile areas is achieved.
Owner:SHANDONG UNIV
Method for magnetically controlling phreatic water level during coal mining
PCT designated stageWO2026031039A1Mining devicesUnderground miningEcological environmentSoil science
The present application relates to the technical field of coal mining and discloses a method for magnetically controlling phreatic water level during coal mining. The method comprises: acquiring pre-mining information data; on the basis of a vegetation type and a soil sample from a phreatic layer, determining a vegetation growth range, the vegetation growth range comprising a water table depth range and a soil moisture content range; on the basis of the vegetation growth range and the pre-mining information data, determining the on or off state of a magnetizing device during mining; if the pre-mining water level of the phreatic aquifer is above the upper limit of a water table depth range, controlling the magnetizing device to be turned off and regulating corresponding information data; and if the post-mining water level of the phreatic aquifer is above the regulated water level of the phreatic aquifer, controlling the magnetizing device to be turned on, and regulating the magnetization intensity, so that post-mining information data is within the vegetation growth range. The present application effectively reduces the evaporation of groundwater and the occurrence of regional salinization, and can effectively protect the ecological environment and implement coal mining.
Owner:LIUPANSHUI NORMAL UNIV
A Foundation Pit Supporting Method for Automatically Controlling Horizontal Displacement of Underground Diaphragm Wall
ActiveCN105696600BRealize automatic controlReduce horizontal displacementExcavationsSlurry wallStructural engineering
Owner:CHINA RAILWAY 16 BUREAU GRP BEIJING METRO ENG CONSTR +2
Mountain three-dimensional seismic data processing and correcting method based on micro-logging
PendingCN121613511ASeismic signal processingSeismology for water-loggingDynamical optimizationWell logging
The invention relates to the technical field of mountain exploration, in particular to a mountain three-dimensional seismic data processing and correcting method based on micro-logging, which comprises the following steps of: 1, acquiring and calibrating micro-logging data; step 2, constructing a micro-logging constraint initial velocity model; step 3, accurately calculating a chromatography static correction value; and step 4, result verification and dynamic optimization. According to the method, micro-logging data are collected and calibrated through grid point distribution and key point encryption, a three-dimensional initial velocity model is constructed by adopting a Kriging interpolation method with the micro-logging data as hard constraint, after the model is optimized through iteration inversion based on a conjugate gradient method, the total static correction value containing elevation, a low speed reduction zone and a phreatic reservoir additional item is calculated through a ray tracing method, and the static correction value is calculated. And dynamic optimization is carried out through double-index verification. According to the method, the speed error of the key stratum is controlled within 5%, the static correction error of the development area of the phreatic reservoir is reduced within 15 ms, the data processing efficiency is improved by 40% or above, and the signal-to-noise ratio is improved by 50%-70%.
Owner:GUANGXI SHALE GAS EXPLORATION & DEVELOPMENT CO LTD
Well mine mountain water dispatching system and control method thereof
PendingCN114164893AAchieve recyclingAvoid wastingGeneral water supply conservationService pipe systemsWater storageControl system
The invention discloses a mine mining mountain water dispatching system and a control method thereof. The mine mining mountain water dispatching system comprises a plurality of underground reservoirs, an earth surface reservoir, a first dispatching pipeline, a second dispatching pipeline and a control system, water in any two underground reservoirs and water in the underground reservoirs and water in the surface reservoir can be dispatched mutually through the first dispatching pipeline, and water in the phreatic bed and water in the surface reservoir can be dispatched mutually through the second dispatching pipeline. According to the mine and mine water dispatching system and the control method thereof, rainwater and other water resources are collected through the earth surface water storage pond, mine water and other water resources are collected through the underground water reservoirs, and water resource dispatching between the underground water reservoirs and between the underground water reservoirs and the earth surface water storage pond is achieved through the first dispatching pipeline; and water resource scheduling between the phreatic water layer and the ground surface water storage pond is achieved through the second scheduling pipeline, cyclic utilization of water resources is achieved, waste of the water resources is avoided, and the ecological environment is protected advantageously.
Owner:CHNA ENERGY INVESTMENT CORP LTD +2
Three-dimensional zoning method and application method of groundwater environmental function in Quaternary multi-aquifer
ActiveCN108629008BAchieve sustainable useAccurate divisionGeneral water supply conservationResourcesWater sourceEnvironmental engineering
The invention discloses a method and an application method of quaternary multi aquifer groundwater environmental function zoning. The method and the application method mainly aims at groundwater environmental functions three-dimensional zoning in plain areas with quaternary groundwater system multiple aquifers. The specific methods are as following of: S1, clearing and defining the spatial distribution of the aquifer group groundwater area and phreatic layer and confined aquifer. S2, according to the current water quality restriction index, aiming at the current situation water quality standard area of the multi-layer aquifer group, carrying out the preliminary delimitation of the environmental functional area according to the current situation water quality; S3, limiting indexes accordingto the current status of the water body of the underground water; S4, for the water quality non-compliance area outside the water source protection area, carrying out comprehensive scoring accordingto the weight quantitative indexes; from the shallow to the deep, the groundwater of each aquifer in the quaternary in the plain area is partitioned in sequence. The method is applied to the classification, grading, zoning and control of the groundwater pollution source in the water source protection area by the environmental protection department, and guides the planning department to carry out the unified industrial layout and planning.
Owner:BEIJING MUNICIPAL RES INST OF ENVIRONMENT PROTECTION
Method for dewatering combined foundation pit under geological condition of water-containing interlayer
The invention discloses a combined foundation pit dewatering method under the geological condition of a water-containing interlayer, which belongs to the field of building construction and comprises the following steps of: opening a drainage deep well and a decompression deep well, ensuring that a phreatic water level is 1m below an excavation surface, and opening the decompression deep well according to a calculated water head; when the foundation pit is excavated to reach 0.5-1.0 m of a water-containing interlayer, a vacuum drainage deep well is additionally arranged in the longitudinal direction of the foundation pit, and the drainage deep well and the pressure reduction deep well are synchronously operated; every 10 downcast pipes are provided with a vacuum pump to form a downcast section; the downcast pipes are exposed out of the ground by 30-50 cm, each downcast pipe is connected into the water pumping main pipe through a second hose, and the joints are wrapped with plastic films. The vacuum pump is connected with a drain pipe which is connected to a ground drainage ditch; the multiple vacuum drainage deep wells are additionally arranged, the dewatering speed is increased through the pipelines in the vacuum drainage deep wells, meanwhile, the foundation pit excavation time is shortened, and the excavation efficiency is improved.
Owner:NANTONG RAIL TRANSIT GRP CO LTD +2
A control method for optimizing groundwater extraction
The present invention discloses a method for optimizing groundwater exploitation, including: obtaining water level data of a phreatic aquifer, rainfall monitoring data of a phreatic aquifer, water storage coefficient and administrative area of a confined aquifer; obtaining groundwater exploitation of a phreatic aquifer based on the water level data, rainfall monitoring data and administrative area; optimizing and controlling the groundwater exploitation of a phreatic aquifer; optimizing and controlling the groundwater exploitation of a confined aquifer based on the water storage coefficient and administrative area of a confined aquifer. The present invention aims to optimize and balance groundwater exploitation among regions under the premise of the strictest groundwater withdrawal and water consumption, and to avoid imbalance between regional extraction and replenishment as much as possible, and can also provide technical support for trading indicators and water volume trading for subsequent groundwater water rights trading.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES
Underground water quality surveying and sampling device
The utility model discloses an underground water quality surveying and sampling device, and belongs to the field of underground water surveying and sampling, the underground water quality surveying and sampling device comprises a sampling structure, the sampling structure comprises a shell, the middle part of the shell is slidably connected with a linkage device, and the middle part of the shell is fixedly connected with a buckle device; connecting rods are fixedly connected to the left end and the right end of the buckle device, two baffles are fixedly connected to the lower ends of the connecting rods, rubber strips are fixedly connected to the front ends and the rear ends of the baffles, limiting hinges are fixedly connected to the ends of the connecting rods, fan blades are hinged to the limiting hinges, and two second extension springs are fixedly connected to the upper end of the buckle device; a water inlet is formed in the upper end of the hollow column body, the sampling structure can be fixed at different positions of the pull rope, so that underground water samples with various depths can be sampled at one time, and sediment samples in an underground water diving area and a confined water area are sampled through the guide pipe.
Owner:叶光滨
Coal mining ecological diving protection method adopting nanobubbles
ActiveCN120061839AUnderground miningSurface miningEnvironmental resource managementEcological environment
The invention discloses a coal mining ecological diving protection method adopting nanobubbles, which comprises the following steps of: 1, predicting the development height H of a water flowing fractured zone by utilizing a water flowing fractured zone prediction method; 2, calculating the development depth h of the earth surface ground fissures; 3, judging the influence types of coal mining on diving, wherein the influence types comprise a diving rising type, a diving falling type and a diving disappearing type; 4, according to the judgment result in the step 3, corresponding nano bubble technologies are adopted for different influence types; and 5, after coal mining is conducted on the adjacent working faces, the first step to the fourth step are repeated till the phreatic aquifer is artificially or naturally restored, the above steps are stopped, and coal mining ecological environment protection is achieved. The method is wider in application range, atmospheric precipitation can be fully utilized, manual irrigation is reduced, the environment is relatively friendly, and meanwhile the extra labor intensity of underground special mining operation can be reduced.
Owner:CHINA UNIV OF MINING & TECH
Diving exercise energy loss measuring instrument and measuring method
ActiveCN110196151BImprove practicalityHydrodynamic testingEducational modelsMeasuring instrumentStream flow
The invention relates to an underwater sports energy loss measurer and an implementation method using the underwater sports energy loss measurer. A physical model is built in a library, quaternary loose zone pore water in the flat area of the natural world is used as a simulating object, to simulate the formation, replenishment, runoff, discharge and hydrodynamic features of phreatic water; energyloss of the phreatic water during a moving process is observed via experiments, and the distribution pattern of a phreatic surface is deeply researched. According to the invention, the set of brand new experiment method and technical means are provided for the problems of how to measure the energy loss, energy distribution along the way, flow and seepage velocity of fluid in the loose pore medium, and the important basic information is provided for regional hydrogeological condition survey, underwater water level resource assessment, underwater replenishment, runoff, discharge and other problems of engineering construction; the good economic practical value and application prospect are provided.
Owner:CHENGDU UNIVERSITY OF TECHNOLOGY
Distributed Xinanjiang model water storage capacity calculation method under unsteady state evaporation condition
The invention discloses a distributed Xinanjiang model water storage capacity calculation method under an unsteady state evaporation condition, and relates to the technical field of water conservancy projects. It is assumed that the evaporation flux and the matric potential absolute value are in a power exponential function relation, a one-dimensional vertical Richards difference equation is adopted, analytical solutions of the water storage capacity, the evaporation capacity and the underground water burial depth about the matric potential absolute value are deduced, firstly, the surface matric potential absolute value is deduced according to the underground water burial depth, and then according to the phreatic evaporation capacity and the evaporation capacity, the ground surface matric potential absolute value is calculated. Calculating to obtain parameters M and x of the power exponential function relationship between the evaporation flux and the matrix potential absolute value, further calculating the water storage capacity, and then obtaining the spatial distribution of the water storage capacity according to the relationship between the terrain index and the burial depth and the spatial distribution of the terrain index, thereby obtaining a new water storage capacity curve. The method effectively improves the precision of the distributed Xinanjiang model for simulating the spatial and temporal variation of the hydrological variables of the watershed.
Owner:ZHEJIANG ZHONGHONG SMART WATER TECHNOLOGY CO LTD +1
Method for measuring hydrogeological parameters of soil layer through CPTU combined with micro-water test
The invention discloses a method for measuring hydrogeological parameters of a soil layer by combining CPTU with a micro-water test, which comprises the following steps of: carrying out pore pressure static sounding and pore pressure dissipation test at a target soil layer position by utilizing CPTU, carrying out the micro-water test in the same test hole, and instantaneously changing the water quantity of a well hole to cause dynamic change of the water level so as to measure the hydrogeological parameters of the soil layer. Recording parameters such as water head change rate, recovery time and initial seepage pressure; according to the method, CPTU test data and micro-water test data are coupled, an inversion model is established to calculate a soil layer permeability coefficient, a water storage coefficient and initial seepage pressure, and coupling results are mutually verified and optimized to form soil layer hydrogeological parameters for rapid in-situ measurement. The method is suitable for a confined aquifer and a phreatic aquifer, can replace a traditional water pumping test and an indoor penetration test, realizes low-cost, high-efficiency and high-precision in-situ hydrogeological parameter measurement, and provides a reliable technical means for underground engineering, water resource evaluation and geological environment research.
Owner:SOUTHEAST UNIV +2
Accurate positioning method for underground deep vertical metal structure
PendingCN121596400AElectric/magnetic detectionAcoustic wave reradiationElectrode potentialPotential difference
The invention discloses an accurate positioning method for an underground deep vertical metal structure. The method comprises the following steps: delimiting a ground to-be-measured area and gridding measuring points, constructing a drill hole penetrating into an underground phreatic bed and below the underground phreatic bed in the area, putting a positive electrode in a pair of power supply electrodes into the drill hole, and putting the other power supply negative electrode to an infinite distance; one of the pair of observation electrodes is connected with the infinite pole of the power supply electrode, and the other observation electrode is in close contact with a ground medium in a to-be-determined area; a power supply electrode and an observation electrode are connected to an electrical prospecting instrument through wires respectively, the potential difference of the ground measuring electrode potential of a to-be-measured area relative to the infinite electrode potential is measured point by point according to measuring points, the coordinate position of an area point corresponding to the potential difference value is recorded, and a geoelectric signal contour map of the to-be-measured area is drawn according to measured data. Therefore, the ground projection center position of the vertical metal structure is determined. The method and device are accurate and convenient in detection and positioning, simple and flexible in construction, low in cost and wide in application range.
Owner:CHANGSHA SHANGZHEN DETECTION TECH CO LTD