70 results about "Karst water" patented technology

The invention relates to the field of hydrology and water resource management and karst hydrodynamics, and discloses a karst basin coupling hydrology model prediction method, which comprises the following steps: S1, collecting and standardizing multi-source heterogeneous monitoring data of a karst basin; s2, constructing a hydrological model for dynamic coupling of surface runoff, fracture seepage and a pipeline network; s3, performing global optimization on the multi-dimensional hydrological parameters by adopting a hybrid intelligent optimization method; s4, performing iterative correction on the model based on a multi-level verification system; and S5, outputting a hydrological prediction result and generating disaster early warning information. By adopting a dynamic adjusting technology of karst area underground river and surface water flow network joint modeling, multi-karst water-containing medium characteristic analysis and integration of underground river and surface water system response characteristics, the problems that a traditional method cannot accurately predict underground water flow and flow velocity, and is difficult to deal with complexity of a karst water system, lack of data and the like are solved.

The invention discloses a deep resource fluidized mining disturbance effect evaluation model under a multi-field coupling effect, and the method specifically comprises the following steps: constructing a multi-field coupling parameter system: collecting geologic body basic parameters, covering rock mass mechanical parameters, thermal physical parameters, fluid parameters and chemical parameters in deep three-high, high ground stress, high ground temperature and high karst water pressure environments, and establishing a multi-field coupling parameter system; the method comprises the following steps: establishing a dynamic parameter database, realizing real-time updating of parameters along with a mining process, establishing a heat-flow-force-chemical full-coupling mathematical model, introducing the influence of a rock plastic damage correction term quantification temperature on heat conduction efficiency, associating a dynamic mapping relation between mineral reaction and rock physical property parameters, and establishing a dynamic parameter database. Simplification errors of a traditional model on multi-field effects are thoroughly eliminated, chained interaction of temperature, fluid, stress and chemical processes in a deep three-high environment is accurately described, a model prediction result better fits an actual mining working condition, and prediction deviation is greatly reduced.

The invention discloses an urban karst water guide channel detection system and method based on earthquake Krauklis waves. The urban karst water guide channel detection system comprises a piezoelectric type vibroseis, an array type earthquake receiving system and a multi-wave seismograph. The piezoelectric vibroseis is used for exciting seismic waves; and the multi-wave seismograph is used for acquiring seismic data acquired by each seismic acceleration sensor in the array type seismic receiving system. The structure can ensure the precision of seismic wave data acquisition each time; separating and extracting Krauklis waves from the acquired seismic wave data by adopting an energy-frequency double-selection method; then, based on the frequency dispersion characteristic of Krauklis waves, a mapping model of crack opening and wave field response is established; and finally, determining the opening degree of the urban karst water guide channel according to the mapping model, and performing inversion to obtain the dynamic flow of the urban karst water guide channel. Through treatment in the mode, the opening degree and the dynamic flow of the urban karst water guiding channel can be monitored, and finally prevention and control over hidden geological disasters are effectively improved.

The invention relates to the technical field of tunnel engineering monitoring, and particularly discloses a karst water-rich stratum large-diameter shield tunnel intelligent monitoring method which comprises the steps of S1, real-time geological detection, S2, shield attitude and mechanics monitoring, S3, hydrology and seepage monitoring, S4, surrounding rock deformation and stress monitoring and S5, comprehensive early warning and feedback. According to the intelligent monitoring method for the large-diameter shield tunnel in the karst water-rich stratum, accurate early warning and intelligent response of construction safety are achieved through multi-source geological detection, real-time mechanical and attitude monitoring, hydrological seepage monitoring and surrounding rock deformation stress analysis in combination with an AI algorithm, edge calculation and an optical fiber sensor; the tunnel construction efficiency and the long-term operation stability are effectively improved, and the intelligent monitoring method effectively reduces the construction safety problems of water burst, ground surface settlement, shield deviation and the like in the karst water-rich stratum by integrating various real-time monitoring technologies and algorithms.

The invention belongs to the technical field of surface collapse group simulation, and discloses a split mounting type surface collapse group simulation experiment system. The system comprises a supporting steel frame, a rainfall simulator, a split mounting type surface collapse model test box, a water level control box, an overflow device, a split mounting type karst pipeline, a split mounting type karst water cavity simulation box, a water supply box, a peristaltic pump and various monitoring devices. Through the split mounting type structural design, the number of collapse points, the distance, the cavity shape, the karst pipeline connectivity, the underground water level, the rainfall intensity and other key parameters can be flexibly adjusted, and multi-working-condition simulation of a surface collapse group is achieved; meanwhile, through cooperative work of various monitoring devices such as a laser displacement sensor and a pore water pressure sensor, multi-physical-quantity data in the collapse process are collected in real time. According to the invention, the problems of lack of surface collapse group simulation capability and poor parameter adjustability in the prior art are solved, and experimental support can be provided for research and prediction of the development mechanism of the surface collapse group.

The invention relates to the technical field of tunnel engineering safety monitoring, in particular to a karst rock stratum tunnel health diagnosis method, device and equipment and a storage medium. Comprising the steps that whether catastrophe nodes matched with tunnel multi-source sensing data obtained in real time exist or not is judged by searching a karst-lining-surrounding rock coupling knowledge graph; if yes, diagnosis is carried out according to a node embedded karst water-rock coupling mechanism; and if not, calling a preset karst catastrophe fusion model to carry out online learning and dynamic diagnosis, and adding catastrophe nodes in the knowledge graph. According to the fusion model, characteristics such as karst water chemical ion concentration change rate, surrounding rock effective porosity mutation gradient and lining back cavity volume growth rate are extracted, karst water inrush and mud inrush risk probability distribution is output based on multiple neural network model parallel coupling architectures, and high-risk perception data are automatically screened out or marked according to a threshold value. The karst water inrush and mud inrush risk of the karst stratum tunnel can be accurately identified, and real-time early warning can be carried out.

The invention belongs to the technical field of tunnels, and particularly relates to a treatment method for a building door tunnel penetrating a karst underground river reach, which comprises the following steps: step 1, multi-source geophysical prospecting fusion investigation: aiming at the tunnel karst underground river reach and the range of 500m around the tunnel karst underground river reach; the method comprises the following steps of: delineating a karst abnormal area by adopting semi-aviation transient electromagnetism; screening a strong corrosion area by adopting a depression analysis method; verifying parameters of the abnormal area through surface drilling and coring; identifying surface hydrology, lithology and seepage data characteristics through unmanned aerial vehicle-mounted high-resolution multispectral and thermal infrared cooperative remote sensing; karst water dynamic conditions including underground water flow velocity, flow direction and permeability coefficient, corrosion evolution characteristics including cavern forming time and expansion rate, and key physical and mechanical parameters including cavern filler porosity, permeability coefficient, surrounding rock integrity coefficient, uniaxial compressive strength, elastic modulus and Poisson's ratio are obtained. According to the treatment method for the building door tunnel to penetrate through the karst underground river section, the karst space characteristics are clearly presented through the arrangement of the treatment method for the building door tunnel to penetrate through the karst underground river section.

The invention discloses a karst underground river type water source area supply area delimiting method, and relates to the technical field of karst hydrogeology. Comprising the following steps: acquiring basic information of a water source and preprocessing the basic information to form an initial information set; determining an initial boundary of a supply area of the water source based on a water point type, a position and surface watershed information of the water source; comprehensively analyzing and correcting to determine an uncertain section after first correction; performing field investigation and checking and reducing on the uncertain section to obtain an uncertain section after second correction; the method comprises the following steps of: performing third correction on the water source area by adopting geophysical prospecting, drilling and underground water tracing tests, checking nearby key pollution sources, determining a final boundary of a water source area supply area, dividing supply subareas according to stratum lithology, karst development degree and the final boundary of the supply area, and determining geographical boundaries of the supply area and the subareas by combining permanent marks. And finally completing demarcation of the supply area. According to the method, high-precision supply area demarcation can be completed, and the method is suitable for development, utilization and protection of karst underground river system water sources with different development degrees.

A coastal karst cement-based expanding grouting material and a preparation method therefor. The material comprises components A and B; the component A comprises a cementing material with volcanic ash characteristics, water and an expanding agent of 0.01-6.0%; and the component B comprises the following in weight percentages: 0.2-1.3% of a water-soluble vegetable gum, 0.5-2.0% of polyacrylamide, 0.01-2.0% of a polyacrylic acid derivative salt, 0.02-1.5% of a complexing agent, 0.05-1.5% of polyhydroxy polysaccharides, 2-70% of water glass and 42.3-90.3% of water. The coastal karst cement-based expanding grouting material has good stability in flowing water, and can fill and reinforce unfavorable geological structures in coastal karst areas, specifically filling fissures and karst caves, plugging water passing channels and the like. Besides, the expansion of the cement-based expanding material is adjustable and can be adjusted and controlled according to the actual filling working condition of the karst caves.

The utility model discloses a karst water-rich tunnel comprehensive prevention and control drainage device which comprises a bottom frame, reinforcing ribs are arranged on the surface of the bottom frame, and one side of the top of the bottom frame is fixedly connected with power supply equipment. The bottom of the mounting moving assembly is fixedly connected with the top of the bottom frame, and the mounting moving assembly is used for quickly mounting and integrally moving the drainage water pump; one end of the filtering assembly is fixedly connected with one side where the moving assembly is installed, the filtering assembly is used for filtering and maintaining dirt sucked in the water pumping process, and the utility model relates to the technical field of drainage devices. According to the comprehensive prevention and drainage device for the karst water-rich tunnel, the movable assembly is arranged, the universal brake wheels and the handle are adopted, the whole water pump body can move rapidly and stably, and the movable pump station is ingeniously arranged at the position of a tunnel face in the tunnel and has the capacity of flexibly moving in the tunneling direction of the tunnel face.

The application provides a karst water flow direction analysis system based on weathered fracture properties, comprising a single well weathered fracture identification module, a fracture property analysis module, and a dynamic and static data verification module for paleo-water flow direction; the single well weathered fracture identification module is to identify the developed fractures by identifying the core and core slice of the coring well, and mainly aims at the weathered fractures in the non-tectonic fractures; the fracture property analysis module is to classify and count the length, occurrence and filling condition of the weathered fractures after identifying the weathered fractures; and the dynamic and static data verification module for paleo-water flow direction comprises static data verification and result verification through single well productivity data. The application can effectively support the restoration of the Ma 5 member karst paleo-geomorphology in the research area by only collecting three types of weathered fracture parameters which are easy to identify.

The invention is applicable to the technical field of tunnel drainage, and provides a drainage device for preventing crystallization of karst water, which comprises a neutralization box arranged in a tunnel and used for adjusting the pH value of the karst water and performing scale inhibition treatment on the karst water, the liquid storage tank is arranged on one side of the neutralization tank and is used for providing a medicament into the neutralization tank; and the water pump is arranged between the neutralization box and the liquid storage box and is used for conveying the medicament into the neutralization box. According to the drainage device for preventing crystallization of the karst water, heavy metal substances in the karst water are adsorbed through the magnet strips, the pH value of the water is adjusted through the neutralization box, the scale inhibitor is added, the karst water is treated from multiple aspects, impurities and heavy metal in the water are effectively removed, water crystallization is delayed, and the drainage water quality is guaranteed; meanwhile, by means of a pH monitoring sensor and a water level sensor, the water quality and water level conditions can be monitored in real time, the agent feeding amount is intelligently adjusted according to the monitoring result, the effectiveness and pertinence of agent use are guaranteed, agent waste is avoided, and meanwhile the treatment effect is guaranteed.

The utility model discloses a high-pressure karst water-rich large section highway tunnel drainage and pressure reduction device, which comprises pressure reduction assemblies arranged along the axis of the tunnel in a mirroring manner and a drainage unit communicated with the two pressure reduction assemblies, the drainage unit is used for draining flowing water generated by the two pressure reduction assemblies, and each pressure reduction assembly comprises a pressure control unit, a pressure control unit and a pressure control unit, the pressure control unit comprises a gravel blind ditch arranged at the position of a tunnel wall foot and extending in the direction away from the axis of the tunnel and a water gathering pipe arranged in the gravel blind ditch. The end, close to the tunnel, of the water gathering pipe is connected with a water pressure valve. The stabilizing unit comprises a plurality of positioning ribs evenly distributed on the peripheral side of the water pressure valve and a plurality of obliquely-arranged locking anchor rods, and the ends, away from the water pressure valve, of the positioning ribs and the ends, away from the water pressure valve, of the locking anchor rods are deeply buried in the rock stratum through concrete; water pressure can be released intelligently according to the water pressure condition, drainage is started automatically when the water pressure reaches a certain degree, the threat of the water pressure in a rock stratum to a tunnel lining structure is effectively reduced, and the lining structure is prevented from being broken down and damaged due to too high water pressure.

The utility model discloses a karst ground subsidence comprehensive monitoring system belongs to ground subsidence monitoring early warning technical field. The comprehensive monitoring system includes underground water pressure monitoring system, soil mass deformation monitoring system and data acquisition system, wherein: underground water pressure monitoring system includes karst water monitoring hole and the first water pressure sensor of setting among them, fourth series water monitoring hole and the second water pressure sensor of setting among them, soil mass deformation monitoring system includes vertical optical fiber monitoring hole and the optical fiber sensor of setting among them, and data acquisition system with first water pressure sensor, second water pressure sensor and optical fiber sensor all electric connection. The utility model selects underground water as the inducing factor of ground subsidence, and simultaneously takes the underground soil mass as the monitoring object, builds the karst ground subsidence comprehensive monitoring system, and multiple monitoring means verifies each other, and is complementary to each other, can provide strong support for the early warning forecast work of karst ground subsidence disaster.

The present invention relates to the technical field of tunnel engineering monitoring, and specifically discloses an intelligent monitoring method for a large-diameter shield tunnel in a karst water-rich stratum, comprising: S1, real-time geological detection, S2, shield posture and mechanical monitoring, S3, hydrological and seepage monitoring, S4, surrounding rock deformation and stress monitoring, and S5, comprehensive early warning and feedback; the intelligent monitoring method for a large-diameter shield tunnel in a karst water-rich stratum in the present invention realizes accurate early warning and intelligent response for construction safety through multi-source geological detection, real-time mechanical and posture monitoring, hydrological seepage monitoring, surrounding rock deformation and stress analysis, combined with AI algorithms, edge computing, and optical fiber sensors, effectively improving the tunnel construction efficiency and long-term operation stability; the intelligent monitoring method effectively reduces construction safety problems such as water gushing, surface subsidence, and shield deviation in karst water-rich strata by integrating a variety of real-time monitoring technologies and algorithms.

The invention relates to the technical field of underground water sampling, and discloses a karst water underground water detecting and sampling device which comprises a sampling barrel, a detachable sealing cover is arranged on the sampling barrel, a pump body is arranged in the sampling barrel, a first L-shaped pipe is arranged at the input end of the pump body and penetrates through the bottom face of the sampling barrel, a water outlet hole is formed in the sealing cover, and a water outlet is formed in the bottom face of the sampling barrel. A water outlet hole is formed in the pump body, a hose is in threaded connection with the water outlet hole, a first connecting pipe communicating with the water outlet hole is arranged on the bottom face of the sealing cover, a second L-shaped pipe is arranged at the output end of the pump body, the second L-shaped pipe communicates with the first connecting pipe, and an annular pipe is arranged at one end of the first connecting pipe. Well washing and sampling are carried out respectively, the sampling process can be effectively simplified while the sampling result is not affected, the sampling efficiency is improved, meanwhile, switching can be carried out between single sampling and continuous sampling, and the practicability is improved.

The invention relates to the technical field of karst hydrogeological exploration, in particular to a karst groundwater main runoff zone analysis method and system. The method comprises the following steps: dividing and pre-analyzing a hydrogeological structure of an exploration area; performing data acquisition to obtain a high-density resistivity profile map and an audio induced polarization anomaly map; selecting an area with abnormally low resistivity or abnormally high audio induced polarization as a charging point, and arranging a charging array around the charging point to obtain a first charging anomaly graph; according to the target layer and the constraint condition, establishing models of different lithology combinations; inputting current to the karst aquifer in the type through the charging array, and measuring the distribution and attenuation conditions of the current to obtain a second charging anomaly graph; according to the relative height difference of apparent resistivity in the second charging anomaly graph, the position and the scale of a hidden karst gap are judged, and the range of a karst intense development section and an underground runoff zone of the karst intense development section is delineated in combination with constraint conditions of the model. According to the technical scheme, the exploration precision and efficiency of the karst groundwater main runoff zone can be improved.

The present invention proposes a method for evaluating the prevention and control effect of karst water disasters in deep mining. Based on traditional geophysical exploration techniques and the data interpolation and masking processing technology of the MapGIS system, sequence fusion is carried out to verify the prevention and control effect. First, a qualitative evaluation is carried out on the aquifer after ground directional near-horizontal drilling and grouting transformation based on physical quantities such as the permeability coefficient and water permeability rate of the target layer to be transformed. Secondly, the MapGIS system is used to analyze and process the grouting parameters of each coordinate point to obtain the "Special Evaluation Map of Grouting Effect Zoning". At the same time, based on the "Evaluation Map of Apparent Resistivity Low-Resistance Abnormal Zone" obtained from mine electrical prospecting, double-map data masking processing is carried out to obtain the "Superimposed Analysis and Evaluation Map of Abnormal Zones". Finally, the "Comprehensive Evaluation Map of the Prevention and Control Effect of Karst Water Disasters in Deep Mining" is obtained and specific steps for eliminating abnormal zones before mining are proposed. The present invention can provide a scientific theoretical basis for the prevention and control of karst water disasters in deep coal resource mining and can effectively avoid the occurrence of water inrush disasters in deep mining.

The application discloses a kind of open cut tunnel main body structure suitable for water-rich stratum and construction method thereof, relate to tunnel construction technical field, the main body structure includes prefabricated box structure, the side wall outer surface of prefabricated box structure, bottom plate outer surface reserved recess, recess is filled with foam concrete to form drainage passage by reserved grouting pipe;Two side walls of prefabricated box structure reserved operation hole, and water diversion pipe is reserved to drilling pile through wall reserved operation hole and drilling pile and is punched to spin jet water stop pile and drains karst water;Two sides of the passage bottom of prefabricated box structure are provided with support column, prefabricated pressure plate is laid on support column, prefabricated road surface plate, drainage ditch and cable trench are laid on prefabricated pressure plate, form sandwich with bottom plate, bottom plate reserved drainage pipe intercommunication sandwich and install triple pressure relief system, the right side wall bottom of prefabricated box structure is equipped with one-way drain valve.Utilize the present application, can simultaneously solve karst water runoff protection, structure safety under high water pressure, anti-permeation leakproof, construction efficient, operation and maintenance convenient and so on.

The invention belongs to the technical field of groundwater pollution control and treatment, and discloses a method for effectively reducing migration of groundwater pollutants in a karst basin, and the method comprises the following specific use steps: S1, data preparation and preprocessing; s2, constructing and improving an SWAT model; s3, performing SWAT model simulation and result analysis; s4, an MODFLOW model is constructed; s5, carrying out MODFLOW model simulation and reaction migration process description; and S6, coupling the SWAT model and the MODFLOW model. According to the method, an SWAT model is improved, distribution of hydrological response units is optimized, a surface karst zone module is added, description of the model on the underground migration process of nitrogen and phosphorus along with karst water is completed, a verification code is obtained by constructing a needed space and attribute database and utilizing actually measured data verification and model adaptability, and meanwhile, the model can be used for analyzing the nitrogen and phosphorus content of the karst water. In the gurge drainage basin, the simulation precision of the model meets the requirement, and the certainty coefficient R2 and the Nash efficiency coefficient are both larger than 0.66.

This invention discloses a method for determining the risk of anti-buoyancy design water level in underground structures in karst areas, relating to the field of geotechnical engineering technology. The method includes: acquiring and standardizing underground structure design data, karst exploration data, geophysical anomaly data, and groundwater level data; dividing the underground structure floor into evaluation units, determining the floor attributes, local low-point attributes, and anti-buoyancy component attribution attributes of each floor evaluation unit; spatially and elevationally matching borehole exposure results with geophysical anomaly results to form a set of karst anomalies; determining the representative water level of groundwater observation wells according to preset target conditions, and determining the base water level of each floor evaluation unit based on spatial correlation and aquifer correspondence; determining the karst influence intensity of each floor evaluation unit based on karst hydraulic connectivity, thereby determining the local design water level, anti-buoyancy design water level risk value, and risk level, achieving unitized, differentiated, and graded determination of anti-buoyancy design water level risk.

The invention relates to the technical field of water resource scheduling management, and discloses an intelligent water resource dynamic simulation, regulation and control system and method based on karst hydrogeological investigation, and the method carries out the precise measurement of the total water storage capacity of a non-water-storage space structure in karst geology based on the three-dimensional model information of a karst geology space in combination with geologic structure analysis software. The water storage capacity of the karst geographic area is reliably evaluated according to the geological space characteristics of the karst geographic area, and the karst geological water resource scheduling precision is improved; according to the karst geological space three-dimensional model information, an intelligent search algorithm and different water storage rate standard karst geological space structure three-dimensional model information based on big data storage are combined to carry out karst geology water storage scheduling rate scientific analysis, and the water storage rate of a karst geological area is intelligently matched based on karst geological area space characteristics. Intelligent and environment-friendly karst geology water resource dispatching operation is achieved, and the efficiency and accuracy of karst geology water resource dispatching are improved.

The invention relates to the technical field of wireless communication networks, in particular to a karst water dynamic monitoring and management method and system based on the Internet of Things. The method comprises the steps that structural data and environmental parameters of a karst pipeline are collected, a propagation loss model is established, and an initial signal attenuation distribution diagram is generated; recognizing a dynamic change influence area representing geological instability; relay nodes are optimally arranged based on structural data of the area, and communication parameters such as transmitting frequency bands, power and angles of the relay nodes are adjusted, so that the transmission efficiency reaches a target threshold value; the matching degree of the communication parameters and the geological structure is evaluated, and an optimized signal attenuation distribution diagram is generated through simulation; and evaluating stability indexes such as signal loss rate and delay time according to the distribution diagram, and confirming a final layout scheme. The technical problems of large wireless signal transmission attenuation and poor stability in a complex karst environment are effectively solved, and the transmission reliability and real-time performance of monitoring data are remarkably improved.

The invention discloses an anti-seismic energy-absorbing construction protection method for karst and travertine geologic bodies, which comprises the following steps: utilizing natural and artificial travertine porous structures, a sparse and dense laminated structure, a wedge-shaped piling structure and a water body oscillation effect to synergistically absorb energy, and absorbing seismic waves by the travertine porous structures through viscous friction and gas-liquid compression of a water body in pores; the travertine density stacking structure dissipates energy through inter-layer sliding of rhombic calcite, the travertine wedge-shaped stacking structure dissipates energy through dislocation sliding, and the travertine lake pool dissipates energy through water body oscillation and fluid-solid coupling; according to the travertine geologic bodies of various forms and sizes and tiny cracks and sections generated and left after earthquake resistance and energy absorption of landscapes of the travertine geologic bodies, continuous seepage of karst water is utilized to promote CaCO3 deposition, and the karst water is regulated and controlled in real time in a spraying mode to reinforce and recover the integrality of the travertine geologic bodies and the landscapes from the top. The method is suitable for ecological protection and landscape construction of various karst and travertine geologic bodies and landscapes thereof, natural heritage places and other landscapes which are easily influenced by earthquakes, and has wide application prospects.

The application discloses a method for calculating epikarst water storage of karst underground river basin. The method comprises the following steps: S1, collecting epikarst water EW, saturated zone fissure water FW and surface water PW samples, analyzing and determining the representative components, and establishing the representative component relationship of the three samples; S2, selecting a rainstorm period, and continuously monitoring the indexes of the underground river outlet; S3, determining the mixing ratio to calculate the final component; S4, using MIX iteration to recalculate the component value of the final component; S5, calculating the mixing ratio of the three end members in each sample at the underground river outlet; S6, obtaining the flow process curve of each end member; and S7, obtaining the epikarst water storage by integrating the flow process curve of EW. The method is guided by the karst water system theory, and the epikarst water flow process curve is separated from the flow process curve after the rainstorm of the underground river by means of water chemistry and isotopes and the like, so that the epikarst water storage is calculated, and the method is low in cost, convenient and high in precision.

The application discloses a kind of abandoned coal mine well drilling hole cement slurry and mud anti-seepage construction method, comprising the following steps: drilling into the depth of quaternary floor at wellhead, and drilling hole cement slurry at the position 4m-5m below quaternary floor, drilling hole mud at the position 1m-4m below quaternary floor;Continue to drill into 1 / 2 depth of well depth, and drilling hole cement slurry at the position 0m-1m above 1 / 2 depth of well depth, drilling hole mud at the position 1m-4m above 1 / 2;Continue to drill into the depth of well bottom, and drilling hole cement slurry at the position 0m-1m above well bottom, drilling hole mud at the position 1m-4m above well bottom;In the foregoing steps, each time drilling, open downhole television hole, detect in downhole television hole and after the last detection is completed, downhole television hole is lowered into air pipe.The abandoned coal mine well drilling hole cement slurry and mud anti-seepage construction method can block the hydraulic connection of surface pollutants and groundwater, control goaf water pollution problem to karst water layer.

The invention provides a double karst water-containing medium physical model construction method and device, and relates to the technical field of karst geology, and the method comprises the steps: obtaining a real rock core structure; performing three-dimensional scanning on the real rock core structure, inputting a three-dimensional scanning image into a preset three-dimensional image analysis model for three-dimensional reconstruction, extracting a network, and constructing a pore network model; extracting pore structure features based on the pore network model, and constructing a pore network three-dimensional model by inputting the pore network model into a preset multi-physics field coupling model for seepage simulation; according to pore size distribution and permeability difference in the pore network three-dimensional model, determining a space division boundary of the porous matrix block and the karst pipeline to obtain a porous medium structure; and performing integrated forming treatment and physical verification on the porous medium structure to obtain the double karst water-containing medium physical model. According to the method, the problem that a physical model cannot truly reflect capability and engineering applicability is solved.

The invention relates to the technical field of oil and gas field development, and discloses a strike-slip fracture-based karst gas reservoir development favorable area optimization method and device.According to the method, firstly, a breaking control karst area is divided into different fracture control areas, and then according to the divided fracture control areas, in combination with the karst water flow direction, the karst gas reservoir development favorable area is optimized; dividing the fracture control area into different fracture control karst reservoir development mode areas on a plane, finally evaluating the stable production capacity of the gas well in the fracture control karst reservoir development mode areas, and finally determining a favorable gas reservoir development area. According to the method, on the basis of strike-slip fracture, deposition, karst and gas well stable production capability evaluation are integrated, a new gas well deployed through the method is formed, high yield is tested, high yield and stable yield of the gas well can be achieved, and the overall development effect of a gas reservoir can be effectively improved.

The application discloses a kind of karst hydrology time series extraction, analysis and semi-automatic method of functional characterization, which comprises: obtaining karst hydrology time series, and pretreatment;Extract flood sample time series from the karst hydrology time series after pretreatment;From flood sample time series, determine flood peak position, extract attenuation process according to flood peak position;Extract functional characterization from flood sample time series, including: Gaussian fitting is carried out to attenuation process, and attenuation coefficient is extracted in segments to extract effective functional characterization information.The application obtains the flood peak process of long time series of karst spring groundwater in the same region quickly by semi-automatic method, and then can carry out other frequency or time domain statistical analysis work on the basis, and obtain more dynamic characteristics of karst groundwater.

The invention discloses a hierarchical design and emergency management method for a deep-buried highway tunnel in a strong karst development area, and aims to solve the problem of high water pressure faced by tunnel construction and operation periods in a karst water-rich area. The maximum bearable water pressure of the lining is determined by combining the fluid mechanics principle and finite element numerical simulation, and grading response measures are made according to the water pressure grade. Meanwhile, the specification of the drainage pipe is calculated based on the Bernoulli equation, a real-time monitoring and emergency management system is established, and tunnel structure safety and ecological environment protection are ensured. According to the method, through combination of prevention and drainage and hierarchical management, accurate control over the tunnel water pressure is achieved, ecological damage caused by excessive loss of underground water is avoided, and engineering economy and safety are remarkably improved. The method is suitable for the deep-buried highway tunnel in the strong karst development area, has wide popularization value, and provides scientific basis and technical support for tunnel design and operation under complex geological conditions.