413 results about "Confined water" patented technology

The invention discloses a true triaxial loading and unloading test device for large-size bedded pressure-bearing rock and a testing method. The device comprises a confining pressure loading module, a sample storage and water outlet module, a confined water loading module, a load loading module and a signal collecting and processing system, wherein the confining pressure loading module comprises two horizontal loading and unloading systems which are independent and perpendicular to each other and is used for performing horizontal load loading and unloading on the wrapped sample storage and water outlet module; the confined water loading module is located at the bottom of the sample storage and water outlet module and is used for performing confined water loading and unloading on the bottom of the bedded rock; the load loading module is located at the top of the sample storage and water outlet module and is used for performing vertical load loading and unloading on the top of the bedded rock; the signal collecting and processing system is used for collecting and analyzing signals in a test process. The test device realizes the true triaxial test of the bedded rock through four independent loading and unloading systems, truly simulates three-way anisobaric stress state of the coal-series bedded pressure-bearing rock and is more true and more reliable than a conventional triaxial test.

The invention discloses a prestressed anti-floating anchor rod and a construction method thereof. The invention is characterized in that alignment steel tubes are arranged in an anchor rod body which is formed by a plurality of steel bars uniformly distributed along the circle, the steel bars are provided with a plurality of barbs, the alignment steel tubes are arranged at intervals along the axis of the anchor rod body and are fixedly connected with the steel bars, the barbs are welded with the steel bars. The construction method comprises the following steps: grouting into piles; arranging the anchor rod; locking the anchor rod; and sealing the anchor. Compared with the prior art, the invention has the advantages of simple structure, convenient construction, good anti-floating effect and low cost, especially being applicable to the reconstruction of old buildings with built underground structures and confined water.

The invention discloses a dynamic monitoring system and a monitoring method of deep foundation pit confined water drawdown. The dynamic monitoring system comprises a monitoring well and is characterized in that a drawdown well pipe is arranged in the monitoring well; the bottom of the drawdown well pipe is provided with a filter pipe in a confined water layer area to be tested; the bottom of the filter pipe is provided with a precipitation pipe; the bottom of the precipitation pipe is sealed; a gap between the upper part of the drawdown well pipe and the hole wall of the monitoring well is filled with hole sealing clay; the gap between the lower part of the drawdown well pipe and the hole wall of the monitoring well is filled with waterstop clay; the gap between the filter pipe and the hole wall of the monitoring well as well as the gap between the precipitation pipe and the hole wall of the monitoring well is filled with gravel filter materials; the inner wall of the drawdown well pipe is longitudinally uniformly provided with a plurality of hole pressure sensors; each hole pressure sensor is respectively connected with a data acquisition instrument via a lead; the data acquisition instrument is connected with a monitoring computer; the filter pipe is communicated with an external water suction pump via a water suction pipe. The dynamic monitoring system has the advantages that confined water level drawdown can be dynamically, precisely and reliably measured, foundation pit confined water drawdown can be judged in real time, and time for a pumping well to stop working is determined.

The invention discloses a huge ultradeep foundation pit accurate subsidence and environmentally-friendly construction method, which belongs to the technical field of constructional engineering. In the design and construction process of a huge ultradeep foundation pit, the accurate prediction and control of the subsidence of the ground surrounding the foundation pit due to compression of a water-bearing stratum during the pumping of confined water in the pit are performed. In the invention, the operation is simple, a handling method is reasonably determined and selected when the subsidence is subsidence is predicted accurately, and thus, the subsidence of the surrounding ground is controlled, environment is protected and the method is an economic construction method.

The invention relates to a pressure and water reduction construction method of ultra-deep foundation pit confined water, which is characterized in that field survey and test are performed to obtain the osmotic coefficient of a water-bearing stratum in the field, the quality of a formed hole is ensured by adopting a gas-lift reverse circulation guide pipe, a well casing structure is optimized, the geological conditions of the field can be adapted with a short filter, a tap is ensured to be deeply descended, and the water discharging amount is ensured at the same time. The invention has optimal water reduction effect, reduces influence on peripheral environments without high-power pumping equipment in the water reduction process, reduces energy consumption reduction, is convenient for construction and is especially suitable for the field with a thicker pebble layer, higher permeability and abundant water amounts.

The invention discloses a deep seam strip mining and filling simulation test system and method, relates to the field of preventing and treating deep rock fissure evolution and water inrush, and solves the important problem that the prior fundamental research is relatively insufficient on rock fracturing law of deep coal seam mining on high confined water, fissure evolution characteristics and inrush prevention by filling; the test system comprises a bearing box, a test model and a filling system; the test model is positioned in the bearing box and comprises a rock stratum and a coal seam positioned in the rock stratum, the rock stratum is made by laying similar material, a water confining device is arranged around the rock stratum, a plurality of sensors and a plurality of plastic balls loaded with calcium oxide particles are buried in the rock stratum, and the coal seam is simulated by arranging a plurality of loaded air bags. The test system can simulate the mining of coal seams under different ratios of extraction to reservation and different mining thickness, and can also provide the study on stress and displacement change law of roof and floor after the mining of coal seams under ratios of extraction to reservation and different mining thickness and after filling of a gob.

The invention discloses an emergency treatment method for sudden gushing of a high confined water stratum foundation pit. The method is characterized by comprising the steps that the water gushing condition is proved, a steel casing is arranged on the water gushing point in a covering manner to serve as an energy-releasing relief well, a simple back pressure platform is arranged at the bottom of the steel casing, the height of the steel casing should be 1 m above the static water level, water gushing kinetic energy can be guided into the steel casing, then, the water head pressure is released, and the water level in the steel casing depends on the pressure difference to be balanced; and meanwhile, the top face of the casing is sealed, communication of internal gas pressure and external gas pressure of the casing is prevented, the backpressure backfilling sealing grouting condition is simulated, a WSS double-tube non-shrinkage two-fluid grouting technology is adopted for carrying out advancing type segmented grouting, and therefore the aims of rapidly controlling water gushing of the foundation pit and reducing the risks of the foundation pit are achieved. According to the method, the number of emergency treatment materials and machine tools is small, the source is convenient, a construction technology is simple, the workload is small, and the construction cost is low; the emergency treatment time is short, and the dangerous omen can be rapidly controlled; and the method is suitable for treating water gushing of the foundation pit in various foundation pit excavation processes, and is particularly best in sudden gushing treatment effect of the high confined water head stratum foundation pit.

The invention relates to a monitoring and early warning system and method, belongs to the technical field of coal mine monitoring, and particularly relates to a comprehensive monitoring and early warning system and method for floor water inrush in a coal mining working face. The comprehensive monitoring and early warning system and method mainly focus on real-time monitoring and graded early warning of a goaf part during the recovery process and after the recovery process of a mine coal mining face, based on a "lower three zones" theory, and a numerical simulation method is combined to determine monitoring positions, a microseism monitoring subsystem is used for monitoring the damage depth of a floor in the coal mining working face, a multi-frequency continuous electrical monitoring subsystem is used for monitoring the height of water table of confined water in the floor of the coal mining working face, the distance between the lowest point of floor damage and the highest point of height of water table of the confined water is calculated; a floor water inrush coefficient method is used for dynamically calculating the water inrush coefficient of the floor of the entire working surface; and the level of floor water inrush early warning is determined through different water inrush coefficients, early warning indication of stress and strain, early warning indication of water temperature and water pressure, and early warning is performed.

Disclosed is a processing method of bark slurries for producing ancient rice paper, which takes sandalwood barks or mulberry barks or Broussonetia Papyrifera barks as starting materials which are firstly processed into burnt barks and then are processed into bark slurries. The processing of burnt barks comprises: softening by water immersion, retting by alkali steeping, steaming by confining water, separation by stamping, natural bleaching, bark ripping and the natural bleaching to dry bark materials for getting the burnt barks, dipping lime with a milk quicklime content of 1 to 75 percent after the softening by water immersion, and retting by means of stacking; and the natural bleaching is to put bark materials steamed by confining water on rock patches of a hillside for exposing to the sunshine and night dew (frost), wind and rain, and for being processed into burnt barks after 1 to 2 years, and the burnt barks are pounded into bark slurries by a pounding mortar. Experiments show that the mulberry barks or Broussonetia Papyrifera barks can also be used for processing ancient rice paper as the sandalwood barks, and the service life of the ancient rice paper is longer than 1000 years.

The invention discloses a foundation pit excavation model test device used in the complicated groundwater environment. The foundation pit excavation model test device comprises a model box, a water tank, symmetry-plane soil retaining units, a foundation pit supporting structure, a pressure-bearing empty space, a confined water pressure adjusting system and a measuring system, wherein the water tank is arranged at the upper right part inside the model box; the symmetry-plane soil retaining units are fixed on the model box; the pressure-bearing empty space is arranged at the bottom of the model box; the confined water pressure adjusting system comprises a miniature water pressure transmitter, an organic glass cylinder device and a flowmeter. According to the foundation pit excavation model test device, dynamic change of water table level and confined water pressure in a foundation pit excavation process can be simulated; water-soil pressure and deformation of a foundation pit under the action of dynamically changed water table level and confined water pressure are measured, related test data are disposed, the issues about foundation pit stress, deformation development rules and the like are determined, effective test data support is provided for research of foundation pit problems caused by complicated groundwater environment such as the dynamic change of the water table level and the confined water pressure and the like, and the basis is provided for a later theoretical analysis model.

The invention relates to a confined water and phreatic water compound simulation experiment device, comprising a water storing tank and a simulation tank, wherein an organic glass tank body is obliquely arranged in the simulation tank, the top of the elevating end of the organic glass tank body extends out of the simulation tank to form a simulated river feeding zone, the plunging end is provided with a rising water wall, a confined aquifer is arranged in the organic glass tank body, and a phreatic aquifer is arranged on a waterproofing top plate of the organic glass tank body between the top of the elevating end and the rising water wall of the organic glass tank body; one end of a simulated water drawing well tube sequentially passes through the phreatic aquifer, the confined aquifer and the simulation tank and extends into the water storing tank, a plurality of holes communicated with the confined aquifer are arranged on a wall at the confined aquifer, and the lower ends of at least four confined water level piezometer tubes sequentially pass through the phreatic aquifer and the confined aquifer and are fixed on a waterproofing bottom plate. The invention has the advantage of reasonable structure, can demonstrate the feeding, running-off and draining features and the complementary relationship of the confined water and the phreatic water, and provides an effective measure for relevant tests and researches on the confined water and the phreatic water.

The invention relates to a shield machine reaching receiving method in a water-rich soft soil stratum, in particular to a shield machine reaching receiving method under the working condition of a short reinforced area in the water-rich soft soil stratum. The problems that the shield machine receiving risk under the water-rich soft soil environment is large, and particularly, the longitudinal reinforcing length of the reinforced area is large are solved. The shield machine reaching receiving method comprises the steps that 1, foundation reinforcing treatment is conducted on the interval receiving end in the water-rich soft soil stratum, and a second reinforcing body is arranged between a first reinforcing body and an underground diaphragm wall; 2, a steel sleeve is mounted; 3, by detectingthe situations of water leakage and sand gushing in prospecting holes, concrete of the tunnel portal underground diaphragm wall is chiseled away firstly, then concrete, inside a confined-water-containing layer, at the bottom of a tunnel portal is chiseled away, mortar is poured at the bottom, and then the surplus tunnel portal underground diaphragm wall is continuously chiseled away; and 4, mortarpacking is injected into the steel sleeve, and a shield machine tunnels into the steel sleeve and stops. The formed reinforced area only needs the longitudinal reinforcing length of 3-5 m, costs of pipeline cutting and transforming, land requisition and demolishing, tunnel occupying for tunneling and the like can be saved, and the invest cost is greatly saved accordingly.

The invention discloses a method for modification and construction of top of Ordovician limestone of mine based on kilometer directional drilling technique. The method comprises the following steps: the drilling work for grouting modification of the top of the Ordovician limestone of the mine is applied through a kilometer directional drilling machine, a hole is drilled nonlinearly along the layer, a layout form of drilling the hole can be one perforated hole and multiple intersected holes, and advance grouting is adopted. According to the method for modification of the top of the Ordovician, the problem of safety mining under the conditions of insufficient thickness and strength of a water resisting layer when performing coal mining above a confined aquifer. An Ordovician limestone karst development structure and a hidden rupture structure are blocked in a large scale without occupying coal mining or driving face, a permeable layer at the top of the Ordovician limestone is converted to a water resisting layer in a certain range, so that ore resources threatened by the confined water are released, driving and recovery can be applied under the environment, no or few water prevention (separation) coal pillars can leave, and the resource recovery rate is improved.

The invention relates to a testing device for inversion of seam floor water inrush and an inversion method of seam floor water inrush and aims to effectively achieve simulating the action of confined water in a seam floor water inrush process, demonstrating a formation process of a water guide passage and collecting related data. According to the technical scheme, the testing device comprises a test rack and a top loading system; a water storage loading plate is horizontally mounted inside the lower portion of the test rack; a retaining plate which is removable is mounted outside the test rack; a testing space used for accommodating simulating material is formed in the test rack between the water storage loading plate and the retaining plate; a bottom loading system is mounted on a bottom beam; the upper surface of the water storage loading plate is evenly provided with water outlets whereby the testing space is communicated with an inner cavity of the water storage loading plate; the lower surface of the water storage loading plate is evenly provided with water inlets communicated with the inner cavity of the water storage loading plate; a water injection line with the free end extending into water of a water tank is mounted on each water inlet. The testing device for inversion of seam floor water inrush and the inversion method of the seam floor water inrush have the advantages that the problem that pressure changes are difficult to control is solved, a function of hydraulic scour-penetration is achieved, and the testing device is an innovated testing device for simulating seam floor water inrush.

The invention belongs to the technical fields of mine water prevention and control and mine physical geography and relates to a method for monitoring the destroying depth of a mining working face base plate in real time. An electrical resistivity measurement and control mainframe is controlled to automatically acquire data through a multi-pole control converter, acquired data are transmitted through a communication cable in real time, existing underground three-dimensional electrical-method software is utilized to process and analyze the data, the change rule of base plate rock stratum electrical resistivity of the working face in the mining process is analyzed in real time, and real-time monitoring of the destroying depth of the mining working face base plate is achieved according to a destroying depth testing value of the base plate in a field. The method is simple, convenient top operate, accurate in measured data, short in working period, high in efficiency and capable of monitoring the destroying development depth of the base plate in the working face and is suitable for a large-mining-depth high-confined water under-pressure coal mining technology.

The invention relates to a deep foundation pit dewatering and decompressing combination well controlled in a subsection manner, which comprises a high-pressure air guiding tube, a well tube, a phreatic aquifer filtering tube, an air sac water stopping disc (including an annular steel groove, an air sac, a connector, a sealing gasket, an air inlet and a rubber band), a confined aquifer filtering tube, a precipitation tube and an air pump. A phreatic water dewatering well and a confined water decompressing well in deep foundation pit dewatering can be combined, the filtering tubes are arranged in a phreatic aquifer and a confined aquifer in a subsection manner, and the air sac water stopping disc is disposed between the two filtering tubes. After well completion is finished, the air sac water stopping disc is started, is opened via high-pressure gas and is sufficiently opened in the annular steel groove, and phreatic water and confined water in the well tube are separated. When the decompressing well needs to be opened, the air sac discharges and extracts gas and recovers under effects of the built-in rubber band and negative pressure, a water pump descends to a confined water well pipe section, and water of the phreatic aquifer and water of the confined aquifer are drained simultaneously. The combination well resolves the difficult problem that phreatic water and confined water in an existing mixed well cannot be separated, and environmental geology is damaged due to the fact that the confined water is pumped for a long time. The purpose of combining the two wells is realized, and the quantity of dewatering wells is greatly reduced.

The invention discloses a physical model test apparatus for confined groundwater in a bedding bank slope, which relates to the technical field of geotechnical engineering. The physical model test apparatus is helpful for analysis of influence of different external conditions on confined groundwater in the bedding bank slope and comprises a surface water infiltration simulation unit, a pervious bed test groove section, a reservoir water level fluctuation simulation unit and a measurement unit, wherein the pervious bed test groove section is obliquely arranged and filled with sandy soil, the surface water infiltration simulation unit has a water storage function and comprises a drain pipe which is inserted into sandy soil in the higher end of the pervious bed test groove section, the reservoir water level fluctuation simulation unit has a water storage function and comprises a seepage port which is connected with the lower end of the pervious bed test groove section, and the measurement unit is used for detecting the values of a confined water head in sandy soil. The physical model test apparatus provided by the invention can simulate generation and changing of confined groundwater phenomena, change laws of each influence factor and interaction between the structural characteristics of the bank slope and the environment.

The invention provides a stratum stress sensitive experiment testing method and device. The method comprises the following steps: (1) obtaining actual geological data; (2) selecting a formula for calculating a reservoir stratum pressure arch ratio according to a shape of a reservoir stratum and dynamic property difference of the reservoir stratum and surrounding rock; (3) determining initial reservoir stratum pressure and initial overburden pressure of reservoir stratum rock; (4) determining a change relation of confining pressure and driving pressure along return pressure; (5) recovering a rock core with undeveloped natural fractures to an original confined water saturation degree; (6) carrying out ageing treatment on the rock core; (7) recovering original stress and fluid pressure of the rock core; (8) simulating stress sensibility of the reservoir stratum in an exploitation process; (9) processing and analyzing data. According to the stratum stress sensitive experiment testing method and device, a quantitative change relation of the overburden pressure of the reservoir stratum along pore pressure in an oil-gas reservoir development process can be obtained according to the actual geological data of oil-gas reservoirs.

The invention provides a leak detection device for an underground diaphragm wall, and a construction method of the leak detection device. The detection device comprises a composite water level monitoring well at a seam of the diaphragm wall to be detected; a wellhole of the monitoring well is internally provided with a plurality of well tubes; the bottom ends of the well tubes penetrate to-be-detected confined water layers in different depths respectively; the to-be-detected confined water layers are covered by filter materials; and the filter materials of the to-be-detected confined water layers are separated by clay balls. The construction method comprises the steps of constructing at least one wellhole, placing the first well tube in the wellhole, allowing the first well tube to penetrate the undermost confined water layer, backfilling the filter material and the clay balls into the wellhole, placing the second well tube in the wellhole, allowing the second well tube to penetrate the second confined water layer, backfilling the filter material and the clay balls into the wellhole, placing the Nth well tube in the wellhole according to the number of the required detection layers in sequence, allowing the Nth well tube to penetrate the uppermost confined water layer, backfilling the filter material and the clay balls, placing the (N+1)th well tube in the wellhole finally for monitoring a shallow water level, and backfilling the filter material to the ground level. Water level situations of the confined water layers can be reflected really.

A deep mining method capable of optimizing support parameters and preventing roadway delaying water gushing includes that (1) an initial supporting scheme is determined; (2) anchoring rod supporting parameters are optimized; (3) the supporting scheme and supporting parameters are determined; (4) a fault fracture zone water-bearing stratum is detected, grouted and reinforced; and (5) roadway waste filling is conducted. By means of the method, a water gushing proceduring concept is provided in theory, and a rock mass creep deformation characteristic and confined water gushing timeliness are proved through experiments. Delaying water gushing is prevented by optimizing the supporting parameters, preventing roadway flowing deformation and improving anti-gushing potential of protecting rock mass.

The invention discloses a method for plugging confined water in an underground coal mine sandstone crack. The method comprises the steps of selecting the transient electromagnetic technology to detect enriched water pressure of a lane in advance; secondly, forcibly plugging a main water outlet point of a receiving head by a two-fluid-grouting method so as to prevent grouting fluid from running out of the water outlet point in the next grouting; thirdly, constructing an enriched water area explored by early-stage transient electromagnetism by using a drilling machine, grouting and drilling a deep part, grouting from the inside to the outside and from the shallow to the deep in a three-dimensional manner until the cracks in the enriched water area are fully injected; and fourthly, constructing the lane after the grouting, arranging a chamber at the position without affecting the normal construction after the lane passes through the enriched water area safely, and constructing a water discharging hole in the chamber so as to discharge water. According to the method, the water discharge cost is saved for a coal mine, and the valuable experience is provided for the prevention and control of the confined water in the sandstone crack of a top plate, so that the method has a broader social promotion prospect.

The invention relates to a method for judging piping seepage damage of a foundation pit containing confined water of a soft soil layer, in particular to a method for judging piping seepage damage of a foundation pit containing aquitard confined water of a soft soil layer. The method comprises the following steps of: deducing a piping seepage damage equation of pit bottom soil according to the soil stability condition of a seepage surface at the foundation pit bottom, and then collating the piping seepage damage equation to obtain a critical piping damage seepage gradient; then establishing a foundation pit two-dimensional seepage computation model to compute a maximum seepage gradient of the pit bottom soil; and judging whether the pit bottom soil has seepage damages or not. Compared with the prior art, the invention overcomes the defect that piping damage phenomena such as quick sand, flowing soil or sand boil similar to boiling, which occur at the bit bottom, can not be explained by applying the strength theory and other methods.

The invention relates to a penetrating-stretching type pore water pressure measurement device and a measurement method thereof. A projecting segment of a taper penetration head is inserted into a filter pipe and is connected with the filter pipe through a screw thread or a pin. The filter pipe is externally provided with a sleeve pipe and is in sliding fit with the sleeve pipe. The sleeve pipe is tightly pressed on a shoulder of the sleeve pipe and the taper penetration head through a gasket. A bottom of a conduit is arranged on an upper end of the sleeve pipe through screw thread or nestification. According to the device and the method, problems that pore water pressure monitoring and measurement are complex and data is not direct in a saturated soft soil distribution region are solved, the device and the method are especially suitable for the pore water pressure monitoring and measurement of a fine grain soil layer with formation reasons of a fourth system river delta phase, an oxbow lake phase, a lake phase, a lagoon phase, a marsh phase and the like, measurement of a groundwater table, a perched water level and a confined water head of underground water, underground water monitoring, and water quality layered monitoring and sampling of an underground water environment. Compared with the prior art, the device has the advantages of simple structure, low cost, practicality and convenience, and the measurement method has the advantages of convenience, easy enforcement, convenient operation and reliable data.