264 results about "Seepage field" patented technology

The invention discloses a multi-field coupling true triaxial test system and an experiment method implemented by the same. The multi-field coupling true triaxial test system is characterized by comprising a true triaxial double-cavity pressure chamber (1), an axial loading system (2), a confining pressure/back pressure loading system (3), a temperature control system (4), a permeation control system (5), a gas loading system (6), a bending element experiment system (7) and a computer (8). The multi-field coupling true triaxial test system and the experiment method have the advantages that stress fields and seepage fields are controlled, and accordingly simulation research can be carried out on seepage anisotropy of rock and soil mass; influence of environmental factors on freezing nucleusor frozen soil samples can be simulated under the effects of temperature fields, the seepage fields and the stress fields; research can be carried out on the physical and mechanical properties of unsaturated frozen soil under the effects of the temperature fields and the stress fields; simulation research can be carried out on change of the physical and earth properties of sediments in generationand decomposition procedures of natural hydrates under multi-field coupling conditions, and simulation research can be carried out on mutual displacement effects between hydrate gas in the sediments and underground water; simulation research can be carried out on the physical and mechanical properties of unsaturated soil under the multi-field coupling conditions.

The invention discloses a device for testing the durability of a water pressure resistant grouted rock, which comprises a pressure chamber, a control cabinet, heating equipment, pressurizing equipment, measuring equipment and accessory equipment, wherein the heating equipment can supply a stable heat source for the pressure chamber; the pressurizing equipment can provide confining pressure and osmotic pressure for the pressure chamber; the pressure chamber can apply an axial pressure by means of a universal test, is corrosion resistant and can realize annular and vertical penetration tests of three kinds of standard samples of different dimensions at different temperatures and pressures; the measuring equipment can realize accurate measurement of temperature, pressure and flow rate; and the control cabinet can realize the accurate control of pressure and temperature. The device can be used for indoor researches on the durability of tunnel water pressure resistant grouted rock or dam impervious curtain in an environment of high-water-pressure and corrosive environment, and at the same time, realizes the researches on the change rule of the permeability of a rock sample under the coupled actions of a temperature field, a seepage field, a stress field and a chemical field.

The invention discloses a test method of karst water burst when tunneling, comprising the following steps of: preparing materials; filling materials; embedding elements; embedding a water tank; injecting water and monitoring, tunneling and monitoring, etc. The invention further discloses a monitor device used for the test method of the karst water burst when tunneling, comprising a module frame fixed on a base, a preset water tank, a water pressure loading mechanism, a stress field monitoring mechanism, a deformation field monitoring mechanism, a temperature field monitoring mechanism, a seepage field monitoring mechanism, an acoustic emission field monitoring mechanism, a module surface displacement deformation observing mechanism, a module deformation and water burst observing mechanismin tunnels after tunneling, a fiber demodulation device and a computer. The invention simultaneously can research the change regularity of premonitory multi field information which induces the water burst when tunneling at different water body containing positions and under different water pressure conditions, has wide application, high reliability, abundant collecting data, high test precision, etc.

The invention discloses a visual model testing device and method for simulating water gushing in a tunnel. The device comprises a model test box, a water tank, a high-pressure water pump, a flow meter, a runoff flow and filling collecting device, a digital photographing non-contact measuring system, an osmotic pressure monitoring system, a fiber grating displacement monitoring system and the like. The testing device is characterized in that the catastrophe evolution process of water gushing in the tunnel is simulated, and anti-gushing rock mass crack growth and water gushing channel formation during water gushing can be directly observed. The device can quantitatively research water gushing behavior of the tunnel under different water pressure, different lithological characters and different thicknesses of anti-gushing rock masses, acquire coupling information of multiple fields such as stress fields, displacement fields, seepage fields and the like during water gushing of the tunnel, determine formation processes and forms of water gushing channels under the effect of different factors, disclose mechanical characteristics and evolution laws in anti-gushing rock mass structure progressive failure processes and provide an effective basis for the tunnel water gushing disaster incoming criterion and the minimum safe thickness analysis method.

The invention discloses a test method of a drill hole gas extraction effective radius. The test method of the drill hole gas extraction effective radius comprises the following steps: selecting a sulfur hexafluoride (SF6) gas trace method to conduct spot test, under the condition of testing different pitches, sampling and collecting the SF6 gas required time which is detected by a detection hole, establishing a module at the basis of the Darcy law based on the occurrence of coal seam condition of the detecting location, simulating the flowing condition of the SF6 gas in a gas seepage field; calculating and obtaining the required time Ti'of the SF6 gas which moves to a sampling and collecting test hole, calculating a sampling and collecting effective coefficient a; detecting the required time of the SF6 gas based on the sampling and collecting detection hole detected by the SF6 gas trace method, calculating the required time which lowers the relative distance gas pressure below an effective value, and calculating the drill hole gas extraction effective radius based on power function relation between drill hole sampling and collecting gas effective extraction effective radius r (m) and the sampling and collecting time t (d). The test method of the drill hole gas extraction effective radius adopts combination of a direct method and an indirect method, and solves the problems that a plurality of defects exist by using the direct method to detect a drill hole gas extraction radius and extraction effective index is difficult to ascertain.

The invention discloses a testing method of water pressure distribution law of a subsea tunnel lining, and the method comprises the following steps: selecting similar materials to simulate a prototype tunnel surrounding rock mass and lining materials based on similarity theory, determining the shape of a testing template according to the shape of the cross section of the water pressure-resistant lining, and completing the making of a model; arranging measuring points of the model, adopting a fiber Bragg grating to collect strain data of the structure, and adopting a U-shaped mercury manometer to carry out data acquisition of water pressure; respectively realizing by controlling a hydraulic jack and the water pressure value of a water pressure gauge at a water inlet of the testing model; and respectively carrying out water pressure distribution on the back of the lining, secondary lining strain acquisition and water discharge acquisition. The testing method can reflect the characteristics of the water pressure distribution law on the back of the tunnel lining under the common function of a strain field and a seepage field, the secondary lining stress and the deformation.

The invention relates to a simulation device for widely simulating vertical migration of pollutants in a water containing layer. The simulation device comprises a water containing layer simulation device, a rainfall device, a water level adjusting device, a vacuum pump and a pressure gauge, wherein a soil sample is filled according to a given zooming ratio and the real situation of the field stratum, a pollutant feeding device, a soil sample filling device, a pressure detection device and a water sample detection device are arranged and are used for monitoring parameters such as a pressure field, a hydrochemical field, and a seepage field, and a vertical migration rule of the pollutants in the underground water water-containing layer can be observed by virtue of the parameters. The simulation device has advantages of being capable of filling a seepage layer after being zoomed according to a given ratio and the situation of the field rock stratum, the hydraulic pressure on the upper end and the lower end of the seepage layer can be adjusted by virtue of a negative pressure layer, the influence of the rainfall process and microbial bacteria in the seepage layer medium on the migration of the pollutants in the vertical direction of the water containing layer can be simulated, and the migration rule of the pollutants in the stratum medium in the actual field situation can be effectively disclosed from the perspective of indoor tests.

The invention discloses a coalbed methane gas drainage testing method during the combined mining of multiple coalbeds. The testing method comprises a first step of previous preparation, a second step of gas absorption, a third step of gas drainage, a fourth step of finishing a first test and a fifth step of changing one testing parameter, such as the simulation mining depth or the advance speed of a model working face, remaining other testing parameters unchanged and repeating the second step, the third step and the fourth step. The method can simulate the coalbed methane exploitation in the spot working condition in a laboratory, reappear the change of a coal bed parameter in the actual working condition, study the changes of a stress field, a fracture field, a seepage field and a temperature field and analyze the spatial-temporal evolution and the distribution law of the gas flow of the coalbed and the fracture coupling of the coal and rock.

The invention discloses a distributed optical fiber testing method for porous medium structure seepage. The method comprises the steps of: (1) constructing a porous medium structure model groove; (2) forming a uniform and steady seepage field; (3) conducting temperature monitoring on the target optical fiber embedded in the model groove; (4) carrying out ohmic heating operation on the target optical fiber; (5) measuring the temperature rise curves of different heating power under the steady seepage condition; (6) constructing a heat transfer equation of a total heat transfer coefficient of the optical cable; (7) representing the heat transfer between optical fiber and a seepage containing saturated porous medium by the total heat transfer coefficient; (8) measuring the temperature rise curves of different heating power under the condition of different seepage rates; and (9) monitoring the seepage rate. The method provided in the invention establishes an empirical relationship mathematical model of the seepage rate total heat transfer coefficient, accurately pinpoints the linear correlation between the seepage rate and an average total heat transfer coefficient, and reliably guarantees the monitoring precision.

The invention discloses a gas permeation test device and method for fractured coal rock and belongs to the field of seepage of coal rock. The invention provides a device for the gas permeation performance of the fractured coal rock, wherein the device is relatively excellent in air impermeability and precise in axial displacement parameter and confining pressure change can be known through the device. Moreover, through the device, research on the influences of air pressure at different temperatures and in different directions on the seepage property of the fractured coal rock can be realized. The problem in the prior art that the influence of a thermal field on gas permeation is unknown and the gas permeation property of the fractured coal rock under the multi-directional gas pressure difference is unknown is solved. Furthermore, the flow of the seepage field in each layer and the pressure difference change characteristic in a compaction process under the condition that multiple layers of coal rock with different lumpiness grains are combined are fully tested.

The invention discloses a GMS-based (groundwater modeling system) forecast method for ground water seepage fields at different mining levels of a mining area. The method comprises the steps that through performing analytical investigation on hydrogeological conditions of an area, boundary conditions and water containing bodies are generalized, ground water runoff conditions are analyzed, and coefficients of each source sink term are determined; the GMS is adopted to perform finite difference grid division on a simulation area, an initial water head is determined based on the water level of an observation well, hydrological parameters of each simulation sub-area are determined based on a pumping test and the provided data, hydrological module types of the source sink terms in the area are analyzed, assignment is performed on a corresponding hydrogeological map layer by combining the determined source sink term coefficients, and then a subarea map of the osmotic coefficients at different mining levels is obtained; prediction models for ground water seepage fields of a mining area are established based on GMS, and the observation data is utilized to adjust the hydrogeological parameters of the models, and finally, simulation is performed by combining with the discharge capacities at different mining levels to obtain the ground water seepage fields at different mining levels. The method has the advantages of convenience in operation, excellent three-dimensional visualization function and reliable result.

The invention discloses an evaluation method for unconventional reservoir volume transformation multi-pore media productivity contribution. The evaluation method comprises the following steps that firstly, based on the principle of effective stress and flow characteristics of a transformation zone, and a fluid-solid coupling mathematical model of interaction between a geotechnical deformation field (stress field) and a fluid flow field (seepage field) of the unconventional reservoirs is established; then a perfectly coupled method solution of the seepage field and the stress field is realizedby solving a fluid-solid perfectly coupled system of partial differential equations in a general formula mode; and finally, fluid-solid coupling interactions under different combinations of pore mediaare simulated, and the contribution ratio of three systems of base materials, natural cracks and grid cracks to the cumulative production of a volume transformation well is obtained. A set of evaluation method for unconventional reservoir volume transformation multi-pore media productivity contribution is established eventually. The evaluation method for unconventional reservoir volume transforming multi-pore media productivity contribution has the advantages that the model factor consideration is comprehensive, the evaluation method is simple and results are quantifiable, an oil and gas field can be guided timely to be subjected to development measure adjustment and comprehensive management, and a theoretical basis and technical support are provided to the unconventional reservoir to realize economic recovery.

The invention discloses a model experimental device for piping damage development process of embankment project sandy soil, belonging to the field of physical model experiments of water conservancy projects. The model experimental device comprises three parts, namely a box-shaped experimental instrument, a varying head water supply device and a data acquisition device. The model experimental device can be used for simulating the seepage field change caused by seepage deformation until damage of the dyke-based sandy soil in the embankment project and erosion deformation of the sandy soil and representing the forming and developing process of piping damage of dyke-based sandy soil in the embankment project more reasonably. By adjusting types of an experimental soil sample, the piping damagephenomena of various dyke bases in the embankment project such as uniform dyke base, a dual-layer dyke base, a multilayer dyke base and the like can be simulated; and by adopting a mode of gradually increasing the water head and changing the position (the length of a seepage path) of a piping port, the piping damage and development processes under various hydraulic conditions in embankments of rivers can be simulated. The model experimental device is applicable to scientific research on piping damage relevant to embankment projects, provides guidance for design of actual embankment projects or can be used for teaching experiments of water conservancy project and gotechnical engineering disciplines.

The invention discloses a multi-field-coupled coal mine dynamic disaster large-scale simulation testing method, which includes the following steps: (1) completing formation and assembly of coal and rock inside a test piece box, connection of sensors and circuits and connection of a gas circuit; (2) placing the test piece box in a pressurizing system at a preset position, pressurizing the test piece box in the X-axis, the Y-axis and the Z-axis; (3) starting a data acquisition system; (4) degassing; (5) charging gas; and (6) outbursting. The method disclosed by the invention can monitor coal and rock gas pressure, ground stress, temperature variation of a coal and rock body as well as space-time evolution law of an acoustic emission signal of the coal and rock body before and after the occurrence of a coal mine dynamic disaster, and achieves the purposes of studying internal relations among a stress field, a seepage field, a temperature field and a fracture field as well as studying mutually coupled action mechanism thereof during the coal mine dynamic disaster, thereby revealing the occurrence mechanism of the coal mine dynamic disaster and providing theoretic base for prevention and control of the coal mine dynamic disaster.

The invention discloses a compound vacuum negative pressure soft foundation solidification technology indoor simulation analysis meter. A counterforce plate can be placed and fixed on a stand column at the upper part of a model slot; a compression airbag and a bearing plate are arranged below the counterforce plate in sequence; a pore pressure sensor, an electric potential sensor and a compressible drainage electrode can be inserted in a soil sample according to a predesigned arrangement manner; wires at ends of the pore pressure sensor, the electric potential sensor and the compressible drainage electrode are respectively connected with a pore pressure data acquisition instrument, an electric potential acquisition instrument and an electric osmosis automatic controller through wire conduits; the end of the compressible drainage electrode in a sand cushion clings to a horizontal drainage pipe; and the horizontal drainage pipe is connected with a water-gas separation bottle through a rubber hose. According to the compound vacuum negative pressure soft foundation solidification technology indoor simulation analysis meter, the amplitude of the vacuum degree in the soil mass can be regulated and controlled and an electric osmosis electrode can be arranged according to the design requirement; and by combining the automatic intermittent electrification and electrode conversion technology, the distribution form of the seepage field, the stress field and the electric field of the soil mass in the engineering practice are comprehensively demonstrated, and quantified indoor simulation and analysis with electric osmosis, vacuum and preloading combined compound negative pressure solidification technology effect can be carried out on the soil mass.

The invention provides an earth and rockfill dam seepage field monitoring system and an early warning method thereof, and belongs to the technical field of earth and rockfill dam seepage disaster early warning. The earth and rockfill dam seepage field monitoring system comprises an electrical acquisition instrument, a data transmission device, an upper computer and a plurality of electrodes arranged in a dam body, wherein the plurality of electrodes are connected with the input end of the electrical acquisition instrument; the output end of the electrical acquisition instrument transmits datainformation to the upper computer through the data transmission device. The early warning method of the earth and rockfill dam seepage field monitoring system comprises the steps of field monitoring,monitoring system arrangement and terminal early warning. The monitoring system shows dam seepage characteristics in a full cross-section way; the full-coverage comprehensive assessment on the dam health state is facilitated; only once installation is needed; the test time period is more flexible; the dam inside seepage field change features are analyzed in real time; the long-period monitoring isrealized; the monitoring system field arrangement is flexible; the device structure is simple and the installation is convenient.

The invention discloses a true triaxial fracture seepage continuous test system and method, and belongs to the technical field of rock mass mechanics and engineering. The true triaxial fracture seepage continuous test system comprises a fracture seepage continuous test system, a true triaxial loading system, a confining pressure injection system, an acoustic emission monitoring system, a servo control system and a data acquisition and control system. Fracture seepage continuous testing is achieved by control over a pneumatic steering valve, the actual stress, temperature and seepage conditionof rock in stratum is simulated under effects of a temperature field, a seepage field and a stress field, fracture seepage continuous test is performed on a test piece so as to test a fracture effectof the rock, the crack initiation, expansion and opening and closing characteristic of a gap generated by a crack is completely monitored by the acoustic emission monitoring system, the gap formationand expansion mechanism is observed, analyzed and mastered, and theoretical foundation and experiment basis are provided for hydraulic fracturing of coal bed gas and shale gas.

The invention discloses a multifunctional multi-field coupled seepage experiment device. The multifunctional multi-field coupled seepage experiment device comprises a device body, a stress field control system, a temperature field control system, a fluid loading control system and a fluid seepage measurement system. The invention further discloses seepage experiments performed on tight gas, shale gas, tight oil, shale oil, natural gas hydrate and geothermal heat in a multi-field coupled state of a temperature field, a stress field, a pore pressure field and a seepage field. The invention has the beneficial effects: the temperature and pressure needs of the tight gas, the shale gas, the tight oil and the shale oil are met, and more importantly, it meets the high temperature need of geothermal heat exploitation can be met while the low temperature need of a natural gas hydrate flow test is met; a real stratum environment is simulated, and the exploitation seepage experiments of unconventional energy resources such as the tight gas, the shale gas, the tight oil, the shale oil, the natural gas hydrate, a dry hot rock and the like can be completed respectively by using the same equipment.

The invention discloses a simulation and forecast evaluation method for delaying water inrush by a mine fracture structure, comprising the follow steps: (1) putting forward an analysis method that mechanism for delaying water inrush, inoculation process and fracture structure hydraulic properties change with the time going because of the action of mining engineering under the condition of hydrogeological parameter variation due to stress strain redistribution; according to the water-rock interaction theory, analyzing circulation process of mutual action and mutual influence among stress, strain and permeance performance of the substances in fracture zone, and the genesis mechanism for hydraulic property conversion under the disturbance of the mining engineering; (2) according to the coupling rule of the mechanics parameters and the hydraulics parameter of the rock body, putting forward a rheology-seepage coupling simulation evaluation method under the variable parameter condition. The rheology-seepage coupling simulation evaluation method under the variable parameter condition builds the variable parameter rheology stress field and the seepage field coupling model by virtue of complying with the coupling rule of the mechanics parameters and the hydraulics parameter of the rock body, considering the substances in the fracture zone as rheopectic material, and basing on the rheological model of the rock body under the variable parameter condition.

The invention relates to a parallel-type rock temperature, seepage and stress coupling triaxial rheometer which comprises a loading framework, wherein a plurality of triaxial pressure chambers are arranged in the loading framework; pressure heads of the triaxial pressure chambers are respectively connected with an axial pressure servo control system; the triaxial pressure chambers are connected with a confining pressure servo control system through oil pipes; samples in the triaxial pressure chambers are connected with a pore pressure servo control system through water pipes; electrical heating parts are arranged on the outer wall of the triaxial pressure chambers, and are connected with a temperature control system; the axial pressure servo control system, the confining pressure servo control system, the pore pressure servo control system and the temperature control system are all connected with a data acquisition and control system through electric circuits; the data acquisition and control system controls the stress field, the seepage field and the temperature field of the samples in real time, so as to measure the rheological deformation of the samples under different temperature, seepage and stress coupling conditions. The triaxial rheometer can be used for conducting a plurality of groups of rheological tests under different temperature, seepage and stress coupling conditions at the same time.

The invention discloses a gas extraction well location method based on an overlying rock fracture shell. The gas extraction well location method based on the overlying rock fracture shell is characterized by comprising the step of drilling tilting holes with large diameters in multiple areas of a gob overlying rock from a gas tail lane (6) directly. The multiple areas of the gob overlying rock comprise a low post fracture shell (1), a middle post fracture shell (2) and a high post fracture shell (3) from bottom to top, wherein the low post fracture shell (1) is a gob fracture vertical destroying development zone, the high post fracture shell (3) is a gob separation layer fracture and micro fracture development zone, and the middle post fracture shell (2) is located between the high post fracture shell and the low post fracture shell. The construction of extracting and drilling is carried out directly by using the existing gas tail lane, and extraction drilling holes are respectively arranged in the multiple areas of the overlying rock. Not only can gas with high concentration be effectively extracted, but also a seepage field on a gob return air side zone is interfered. Extraction efficiency is high, the processes of digging, drilling and drainage lane are reduced, the link of process engineering is simplified, and cost is lowered.

The invention discloses a repeated fracturing method for a low-yielding and low-efficiency old oil well, and relates to the technical field of repeated fracturing and production-increasing. The method comprises the steps that numerical simulation is conducted to obtain the reservoir remaining oil distribution characteristic according to the reservoir microscopic characteristic, the production performance analysis and the site parameter obtained by testing; a crustal stress field prediction model is established under the development condition of a single well or a well net to obtain the crustal stress field state before repeated fracturing is conducted; a reconstructed reservoir is obtained based on the reservoir remaining oil distribution characteristic; a reconstructed crustal stress field is obtained according to the crustal stress field state before repeated fracturing is conducted; the penetration of artificial fractures of the reservoir is optimized to promote generation of the stress interference between the fractures, and the spreading directions and the complexity of the fractures are changed to obtain a reconstructed underground seepage field; artificial complex fracture net seepage channels are established under the reconstructed reservoir, the reconstructed crustal stress field and the reconstructed underground seepage field to form a fracture control matrix unit; and full-scale water injection is conducted on the reservoir to improve the driving pressure difference of seepage of fluid in the fracture control matrix unit to the fractures.

The invention discloses a roadbed soil displacement field and seepage field visualized testing apparatus under seepage moving vehicle dynamic load and a testing method thereof. The visualized testingapparatus comprises a seepage system, a roadbed simulation system, a load simulation system and a data acquisition system, and the seepage system is composed of a water supply case and a feed pipe; the feed pipe is connected with the bottom of a test model groove, multilayer pebbles are sprayed in the test model groove, and saturated and transparent soil is placed on the multilayer pebbles to simulate the roadbed fill soil; an engineering pile is buried in the saturated and transparent soil to simulate the piled roadbed; the load simulation system is composed of a support, a hydraulic oil pumpapparatus, a servo actuating arm, a roller, and a computer; and the data acquisition system is composed of a laser, a CCD camera and a computer. The technology can realize the visualized observationof the roadbed soil displacement field and the soil displacement field under the seepage moving vehicle dynamic load, and the testing apparatus has the advantages of simpleness, economic performance and high feasibility.

The invention discloses a multi-field coupled low permeability coal seam hydraulic fracturing simulation test method, which comprises the steps of: previous preparation, stress loading, hydraulic fracturing, ending of first test, and other tests of the same group. Accordingly, low permeability coal seam hydraulic fracturing under field conditions can be simulated in a laboratory to make coal seam parameter change under actual working conditions reappear, study the change of a hydraulic fracturing stress field, fracture field, seepage field and temperature field, analyze the relation between hydraulic fracturing and fracturing area location, fracturing section length, and analyze the hydraulic fracturing fracture channel and coal seam gas flow coupled space-time evolution law. Also, for low permeability soft coal seams, in a test piece molding process the coal seam adopts pressed molded coal for simulation, the top plate employs cement, gypsum or other materials for simulation, an outer tube is buried in the top plate in advance, and by changing the normal distance between the outer tube and the coal seam, a proper distance for low permeability soft coal seam roof fracturing can be researched.

The invention relates to a test tank for water-level soaking stability of a dam, in particular to a test tank for high-water-level soaking stability of a dam, and aims to solve problems of difficulty in provision of constant water levels and difficulty in control on water leveling falling speeds in existing dam stability test devices, difficulty in monitoring of dam seepage fields and difficulty in monitoring of dam slope failure and instability changes. The test tank comprises a water pump, a water supply pipe, a balance water tank, an overflow pipe, a water adjusting device water outlet pipe, a hydraulic lifting device, a connecting pipe, a water inlet pipe, a test tank body, a track, an ultrasonic automatic terrain measurement and analysis system, an upstream organic glass sieve plate, a ruler, an upstream inserting groove, an upstream earth retaining plate, a piezometric pipe, a downstream inserting groove, a downstream earth retaining plate, a downstream organic glass sieve plate, an angle steel support, water discharge pipes, valves and water meters. With the test tank, water conservancy conditions such as the constant water levels, control on the water leveling falling speeds and the like can be provided, and pore water pressure and seepage lines inside the dam are monitored. The test tank for the high-water-level soaking stability of the dam can be obtained.

The invention relates to the field of tunnel excavating, in particular to a water draining method for the tunnel construction process of penetrating through a water-rich fracture zone. A water guiding structure is arranged on an interval rock wall of a small-distance tunnel to drain water burst on a tunnel face of the water burst tunnel to the other tunnel, and the water discharging flow of the water burst tunnel is increased. According to the water draining method for the tunnel construction process of penetrating through the water-rich fracture zone, based on the surrounding rock seepage field theory, the safety distance of the left tunnel and the right tunnel is kept when the small-distance tunnel is excavated, a non-water-burst tunnel is adopted as a diversion tunnel to replace the water draining mode of arranging an independent diversion tunnel, the problem that the independent diversion tunnel needs to be arranged in tunnel construction in the situation that the water burst amount of the ridge tunnel is too large is solved, the construction period of the tunnel is shortened, the project cost is reduced, and the construction risk is lowered.

The invention provides a fractured carbonate rock matrix and crack coupling action characterization method. The fractured carbonate rock matrix and crack coupling action characterization method comprises the steps that 1, a flat plate crack model with different crack open degrees is constructed; 2, the flat plate crack model with the different crack open degrees is applied to a CT scanning carbonate rock matrix digital rock core, and a fractured carbonate rock three-dimensional digital rock core is constructed; 3, the distribution of a seepage field of the three-dimensional digital rock core is simulated through the lattice Boltzmann method, and the permeability of a three-dimensional digital rock core model is calculated; and 4, the permeability coupling coefficient is introduced, the permeability result is analyzed, and the permeability coupling coefficient expression is determined. According to the fractured carbonate rock matrix and crack coupling action characterization method, the problem that the total permeability is affected by the fractured carbonate rock seepage coupling action is solved, the flowing capacity of carbonate rock fractured reservoir fluid is reflected more realistically, and a help is provided for well logging, reservoir evaluation and oilfield development.

The invention provides a shale gas well spacing optimizing mining method, and belongs to the technical field of oil and gas reservoir development. The shale gas well spacing optimizing mining method comprises the steps: firstly, the block area is determined according to a geologic structure obtained through surveying; the reservoir connecting situation is analyzed, and a minimum development area unit is determined; the available reserves in the unit are calculated, and an alternative object is determined; a representative shale core is taken and subjected to physical property analysis; a seepage field and a pressure field are calculated through a multi-filed, multi-flow-state and multi-scale united mathematical model; the effective available area of each well is calculated; and in the welldistributing process, the wells are distributed according to the principle that the interwell interference rates are calculated to be not larger than 10%. According to the shale gas well spacing optimizing mining method, the shale gas development well spacing can be reasonably formulated, and the yield of shale gas is effectively increased.