191 results about "Confined water" patented technology

The invention discloses a water-preserved mining distinguishing method for in-situ protection of floor confined water. The water-preserved mining distinguishing method comprises the following steps that the average distance between a mining coal seam floor and an aquifer, the average thickness of the aquifer, the average permeability, the working face length and the advancing distance length are determined; the average depth of the mining floor fracture zone and the average thickness and the average permeability of all rock strata below the fracture zone are tested, and the equivalent permeability is obtained; the water pressure of the confined aquifer is tested and counted, and target water pressure is determined; calculating the allowable coal mining loss water resource quantity; determining a critical equivalent permeability coefficient; the equivalent permeability is compared with the critical equivalent permeability, and the calculated water inflow is compared with the safe recovery water inflow of the working face; and finally, the feasibility of water-preserved mining of in-situ protection of the confined water of the floor is judged. Based on the dynamic water storage and release characteristics of the confined aquifer, the mining floor effectively obstructs the overall water blocking performance of the rock stratum, the water-preserved mining judgment method for in-situ protection of the confined water of the floor is provided, operation is easy and convenient, and the field applicability is high.

The invention belongs to the technical field of foundation pit confined water precipitation monitoring, and particularly relates to a foundation pit confined water precipitation dynamic monitoring system which comprises a monitoring well laying module, a water pumping test implementation module, a permeation direction distribution determination module, a uniform distribution precipitation monitoring module and a differential distribution precipitation monitoring module. Monitoring wells are arranged in different directions in the surrounding area of the foundation pit before pressure-bearing precipitation operation of the foundation pit, so that a real-time water pumping test is performed, the foundation pit soil permeation direction distribution mode is analyzed by means of a water pumping test result, targeted implementation is provided for subsequent precipitation operation, the settlement risk is reduced on the basis of guaranteeing the precipitation effect to the maximum extent, and the construction period is shortened. In addition, after the permeation direction distribution mode of the foundation pit soil is obtained through analysis, foundation settlement detection is carried out while water level height monitoring is provided in the precipitation operation process in a targeted mode, then the precipitation rate is dynamically adjusted through the comprehensive detection result, potential precipitation risks can be visually recognized, and construction safety is ensured.

The invention relates to the technical field of environmental geological engineering, in particular to test equipment and method for simulating stratum deformation caused by confined water exploitation and recharge, and the test equipment comprises a model box frame, a cross elevator, a water suction pump, a sedimentation tank and a model box, and is characterized in that the inner wall of the model box frame is fixedly connected with organic tempered glass; a counter-force beam is fixedly connected to the top of the model box frame, three mechanical jacks are fixedly installed on the top of the inner side of the counter-force beam, a plurality of internal water injection pipes which are distributed at equal intervals are laid on the inner side of the model box frame, and a steel wire hose is connected between every two adjacent internal water injection pipes in a threaded mode. Through cooperation of the structures, the large-scale physical model test device which is rich in function, reasonable in design, practical and feasible is formed, and the process of ground subsidence and springback caused by dynamic changes of multi-layer pressure-bearing water levels can be simulated.

The invention belongs to the technical field of building construction, and discloses an ultra-deep foundation pit supporting device and a construction method.The supporting device comprises supporting assemblies, a lifting assembly and a control assembly, at least two sets of supporting assemblies are arranged at intervals in the depth direction of a foundation pit, and a multi-stage temporary supporting system is alternately formed in the foundation pit. Each supporting assembly serves as a formwork frame of the concrete support and temporarily supports the concrete support before the concrete support reaches the formwork removal strength, the lower layer supporting assembly provides temporary side wall supporting below the concrete support at the same time, layer-by-layer continuous excavation is achieved, waiting for the concrete strength is not needed, and the construction waiting time is shortened. According to the construction method, the liftable supporting assemblies are adopted for alternate supporting in the dry soil excavation stage and the underwater excavation stage, so that the foundation pit is in smooth transition among different working conditions. Meanwhile, after the dry soil is excavated to a certain depth, water is injected to the height of a confined water head, water pressure inside and outside the pit is balanced, confined water inrush and pit bottom upheaval are effectively prevented, and safe and continuous construction is achieved through dynamic supporting and cyclic utilization.

The present invention relates to a combined prevention and control deep foundation pit pit-in-pit in a high-confined water formation and a construction method. The construction method includes the following steps: construction platform erection, reinforcement construction of the pit-in-pit, formwork construction, and waterproof coiled material laying. The beneficial effects of the present invention are as follows: A simple steel bar binding bench device is developed. The simple steel bar binding bench is composed of bolts, profiled steel, pin parts, etc., and the binding parameters of the cushion steel bar mesh can be accurately controlled by moving the spacing of the pin parts, reducing the difficulty of binding the cushion steel bar mesh; The hanging platform system is composed of a track groove, a construction platform, telescopic hanging rods, etc., realizing the arbitrary movement of the construction platform in the space of the pit-in-pit and reducing the construction difficulty; The mobile system used can also be used for the subsequent coiled material spreading rack; The attitude adjustment of the steel bar mesh during hoisting is realized through mobile clamping and hoisting, reducing the hoisting difficulty.

The invention discloses a novel method for rapidly enriching heavy metal ions in water by using confined water, and belongs to the technical field of separation and analysis detection, the method comprises the following steps: S1, preparing carbon nanofiber / carbon fiber; s2, loading the carbon nanofiber / carbon fiber obtained in the step S1, and preparing a needle tip device; s3, heavy metal ions in the solution are extracted through the needle point device liquid phase sodium obtained in the S2. According to the novel method for rapidly enriching the heavy metal ions in the water through the confined water, carbon nanofibers / carbon fibers are prepared through a vapor deposition method, the water is confined in a nanometer space, the heavy metal ions in the water are extracted through the confined water, desorption is conducted through the complexing effect of the heavy metal ions and EDTA, and the heavy metal ions are enriched in the water. Green, non-toxic, simple and convenient to operate, rapid and efficient heavy metal ion extraction and enrichment are realized.

The invention discloses long and narrow foundation pit pumping and filling integrated equipment and a pumping and filling method thereof, and relates to the technical field of foundation pit confined water treatment.The long and narrow foundation pit pumping and filling integrated equipment comprises a shell, a water inlet pipe fixedly penetrates through the left side of the shell, a water outlet pipe fixedly penetrates through the right side of the shell, and the input end of the water inlet pipe is connected with a water pump through a hose; the output end of the water outlet pipe is connected with a recharge well through a hose, a pressure regulating mechanism is arranged on the left side in the shell, the water inlet pipe communicates with the pressure regulating mechanism, a filtering mechanism is connected to the right side of the pressure regulating mechanism, and a driving mechanism is arranged in the middle of the right side of the filtering mechanism. And a cleaning mechanism and an impurity discharging mechanism are arranged at the bottoms of the two sides of the filtering mechanism correspondingly. Non-stop cleaning of the filter screen can be completed without disassembling the filter screen, the automation degree is higher, manpower is saved, and the pumping and filling efficiency of confined water cannot be affected while tedious operation is not needed.

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

The invention relates to the technical field of gold mine safety emergency response, in particular to a gold mine ultrahigh confined water burst disaster-caused emergency response system based on intelligent sensing and automatic decision making. Comprising an intelligent sensing module, an automatic decision-making module and an emergency response module. And the intelligent sensing module adopts a multi-sensor fusion network and a wireless sensor technology to monitor related data of confined water in real time and ensure stable transmission of the data. And the automatic decision-making module establishes a risk assessment model through data fusion and a random forest algorithm, and automatically generates an emergency decision-making scheme. The emergency response module utilizes an early warning program to remotely control emergency equipment, a triangulation positioning algorithm and communication equipment so as to help personnel to evacuate safely and rapidly. According to the method, disasters caused by gushing of the ultrahigh confined water in the gold mine can be effectively prevented and coped with, the emergency response capacity is improved, and personnel safety and smooth production are guaranteed.

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

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

The invention discloses a divided water tank device for an internal heat exchanger of a split type solar water heater. Butt welding is carried out by utilizing an end enclosure of a stainless steel confined water bank inner bag; the end enclosure is used as the heat exchanger to play the role of a water tank partition board; the water tank is divided into independent divided cavities; the heat exchanger is sealed with the inner bag of the water tank; the adjacent cavity bodies communicate with each other via draught tubes; the medium circulation and the medium supplement, namely unconfined running of the heat exchanging part, are carried out safely and reliably via an upper circulating pipe and a heat collecting part; and the device can fully improve heat energy transformation and reduce heat loss.

The invention discloses a hot water unit, a control method and system of the hot water unit and a storage medium, and relates to the field of water heaters, the hot water unit comprises a heating host, a pressure-bearing water tank, a water pump, a valve body, a first temperature sensor and a second temperature sensor; the heating main machine comprises a main water tank and a heating device; the valve body is arranged between the water outlet of the main water tank and the second water port of the pressure-bearing water tank or the third water port of the pressure-bearing water tank; the heating device is used for heating liquid in the main water tank and / or the pressure-bearing water tank and adjusting the water flow control strategy of the valve body in real time according to the liquid temperature detected by the first temperature sensor and the second temperature sensor. The working state of the heating device and the operation strategy of the water pump are adjusted in real time by detecting temperature data, energy-saving operation can be achieved, and the safety of the unit is improved.

The invention provides a confined water fracture evolution and seepage coupling model experiment device and experiment method, and relates to the technical field of geotechnical engineering.The experiment device comprises an optical fiber monitoring module, an electrical method monitoring module and a data collecting and processing module, and the optical fiber monitoring module comprises an optical fiber sensor and an optical fiber demodulator; the electrical method monitoring module comprises an electrode array and a resistance measuring instrument and is used for determining the association between the path of seepage water and the crack extension, and the data acquisition and processing module fuses optical fiber monitoring data and electrical method monitoring data and sends the fused data to the data acquisition and processing module. And generating a multi-dimensional data model of mine floor fracture extension and seepage flow, and formulating corresponding coal mine water disaster prevention and control strategies and monitoring schemes according to different seepage migration modes obtained by clustering analysis. For an area with a high-risk seepage mode, the monitoring frequency is enhanced, and targeted prevention and control measures are taken, so that the safety production of a coal mine can be guaranteed.

The invention discloses an actual hydraulic slope calculation method and system based on a fluid-solid coupling effect, belongs to the technical field of coal mine water prevention and control, and solves the problem of how to calculate an actual hydraulic slope value in a water guide channel after overlying strata water guide fractures extend to a loose aquifer under the influence of the coupling effect of mining-induced stress and confined water of a loose formation. According to the method, the fluid-solid coupling effect generated by coupling of mining-induced stress and confined water is comprehensively considered, different permeability coefficient change rules existing in an elastic undamaged area and a plastic damaged area are put forward and embedded into a numerical calculation model, and a water guide channel of a loose aquifer is found out according to pore pressure and seepage vector distribution; and traversing each grid node of each water guide channel to calculate an actual hydraulic slope interval under the influence of the mining-induced stress and the confined water coupling effect, thereby being beneficial to carrying out seepage failure resistance evaluation under the geological condition and the influence of the mining-induced stress and the confined water coupling effect. Therefore, a theoretical basis is provided for the setting of safe mining of the working face of the sand-prevention and collapse-prevention safe coal pillar.

The invention discloses a drainage and depressurization method for confined water of a coal mine floor, and relates to the technical field of mining engineering.The method comprises the steps that mining parameters of a coal face are obtained; according to the mining parameters, bottom plate drainage and drainage drilling parameters are determined; according to the bottom plate drainage and drainage drilling parameters, bottom plate drainage and drainage drilling engineering is carried out on all coal mining sections of the coal mining working face; on the basis of a bottom plate drainage drilling project, drainage is conducted on a bottom plate confined aquifer of the current coal mining section, and the time when the water level in a bottom plate drainage drilling hole reaches the stable water level state is determined; according to the time when the water level in the drainage drill hole of the bottom plate reaches the stable water level state, coal mining is conducted on all coal mining sections of the coal face. The method can reduce the cost of hydrophobic depressurization, improves the efficiency of hydrophobic depressurization, and is more environment-friendly.

The present invention relates to a grouting method for continuous construction through a confined aquifer. The steps of the method at least include: setting at least one temporary bottom sealing structure matching the size of the shaft in a first position not affected by the confined aquifer by spraying premixed concrete onto the framework, the horizontal plane of the temporary bottom sealing structure tending to be relatively perpendicular to the central axis of the shaft, and the distance between the first position and the confined aquifer being not less than #imgabs0# where γ is the specific weight of the impervious layer, γ ω is the specific weight of water, and h is the height of the confined water head; after setting the longitudinal reinforcement structure forming the shaft contour and the water-proof reinforcement structure connected integrally with the longitudinal reinforcement structure, the temporary bottom sealing structure is broken and the shaft is excavated to a preset distance that does not penetrate the water-proof reinforcement structure. The reinforcement layer formed by grouting in the present invention blocks the confined aquifer, so that each excavation section is within the protective layer of waterproof reinforcement, thus avoiding the influence of the water pressure of the confined aquifer.

The utility model discloses an inclined steel pipe pile support with pit bottom pressure reduction and bidirectional grouting functions, and belongs to the field of building construction. The inclined steel pipe pile support sequentially comprises a top conventional section, a middle grouting section, a bottom pressure reduction section and an end grouting head from top to bottom. And a plurality of grouting pipes are uniformly fixed on the inner sides of the top conventional section, the middle grouting section and the bottom pressure reducing section in the circumferential direction. A plurality of lateral grouting holes used for lateral soil reinforcement are formed in the side wall of the middle grouting section at intervals in the axial direction of the lateral grouting pipe; a plurality of filter holes for releasing the pressure of the confined water are formed in the side wall of the bottom pressure reducing section. The end grouting head is of a conical structure for reducing resistance; and an end grouting hole communicated with the end grouting pipe is formed in the end grouting head. The inclined steel pipe pile support has the functions of pit bottom pressure reduction and two-way grouting, and the number of pressure reduction wells in a pit can be remarkably reduced. In addition, after large-scale pouring of the bottom plate is completed, the inclined steel pipe pile support can be pulled upwards to be recycled.

A rapid pressure measuring and releasing device for pressure-bearing water in a drill hole relates to the field of pressure measuring and releasing devices for coal mine drill holes, and comprises a casing pipe and a sleeve which are coaxially arranged and fixedly connected, the sleeve is connected with a pressure releasing pipe, and the pressure releasing pipe is provided with a pressure releasing valve and a pressure gauge; a valve ball is arranged in the sleeve and located above the pressure relief pipe, the valve ball comprises a cylindrical part and arc parts symmetrically arranged at the two ends of the cylindrical part, a through hole is formed in the cylindrical part in the radial direction of the cylindrical part, the vertex positions of the two arc parts are each provided with a valve rod penetrating through the wall of the sleeve, and the valve rods are rotationally connected to the sleeve; and a sealing gasket is arranged on the inner wall of the sleeve corresponding to the cylindrical part. The gate valve is used for solving the technical problem that in the prior art, gate valve installation, pressure measurement and pressure relief are inconvenient.

The invention discloses a drainage test device and method for a self-flowing drill hole of a bed rock confined aquifer, the drainage test device comprises a rock core pipe and a drill rod which are arranged in the drill hole, the drill hole exposes the confined aquifer, the upper end of the rock core pipe is flush with the top of the confined aquifer, and the lower end of the rock core pipe is adjacent to the drill hole in the section of the confined aquifer; the lower end of the drill rod is connected with the upper end of the rock core pipe, a water stop plug is arranged at the lower end of the drill rod, the upper end of the drill rod is connected with the lower end of the water conveying pipe, the water conveying pipe is sequentially provided with a branch pipe, a pressure gauge and a flow control valve from bottom to top, a switch valve is arranged on the branch pipe, and the upper end of the water conveying pipe is matched with the metering device; according to the scheme, the problem that water of a confined aquifer flows to a weathering zone of a relative water-resisting layer through a gap between the rock core pipe and the hole wall to cause leakage and pressure loss is effectively avoided; meanwhile, the drainage test device solves the problem that the height of a traditional additionally-installed drill rod is limited and cannot meet the maximum drop range of the pressure-bearing water level; the measurement is convenient, and the solved permeability coefficient is accurate and reliable.

The utility model discloses a transversely-hung air energy pressure-bearing water tank which comprises two small water tanks which are transversely connected in series, a bottom water inlet design, a baffle, a water guide pipe and a stainless steel pipe insertion design. The hot water is guided to the bottom of the left water tank from the top of the right water tank through a water guide pipe to push the hot water to flow out, a stainless steel pipe is inserted into the top of the left water tank to guide the water to the external water tank, and a space of three centimeters is reserved at the bottom of the external water tank to ensure that the hot water fully rises. The left water tank and the right water tank can heat, the coil pipe pressing heat efficiency is high, the hot water outlet rate can be remarkably increased to 90% or above, mixing of cold water and hot water is reduced, hot water resources in the two water tanks are fully utilized, the installation space is saved through transverse arrangement, and the water heater is suitable for family and commercial scenes.

The present invention belongs to the technical field of foundation pit confined water dewatering monitoring, and particularly relates to a dynamic monitoring system for foundation pit confined water dewatering, including a monitoring well layout module, a pumping test implementation module, a seepage direction distribution determination module, a uniformly distributed dewatering monitoring module, and a differentially distributed dewatering monitoring module. By arranging monitoring wells in different directions in the surrounding area of the foundation pit before the foundation pit confined water dewatering operation, real-time pumping tests are carried out, and then the seepage direction distribution pattern of the foundation pit soil is analyzed based on the results of the pumping tests, providing targeted implementation for subsequent dewatering operations, reducing the settlement risk while maximizing the dewatering effect. In addition, during the dewatering operation carried out targeted after analyzing the seepage direction distribution pattern of the foundation pit soil, the water level height is monitored and the foundation settlement is detected at the same time, and then the dewatering rate is dynamically adjusted using the comprehensive detection results, which can intuitively identify potential dewatering risks and ensure construction safety.

The application relates to the technical field of building waterproofing, and discloses a composite waterproof structure for a high-pressure water environment and a construction method thereof, which comprises a concrete base body including a bearing platform and a raft, the bearing platform is located on the upper surface of the raft and the side wall is exposed, a gradient pressure-resistant waterproof layer covers the exposed surfaces of the side wall of the bearing platform and the plane of the raft, and the gradient pressure-resistant waterproof layer comprises, from inside to outside, an interface reinforcing layer, a permeable epoxy resin layer which penetrates into the surface of the concrete base body by 0.5-1 mm in depth, and a dynamic response layer which is a polyurethane-rubber composite elastomer layer and is tightly attached to the outer surface of the interface reinforcing layer. The gradient pressure-resistant waterproof layer composed of the interface reinforcing layer, the dynamic response layer and a rigid protective layer is combined with the bearing platform and the raft in the concrete base body, and the rigid protective layer enhances the wear resistance, so that the composite waterproof structure with high pressure resistance and high wear resistance is realized, and the stability and durability of the waterproof structure in the high-pressure water environment are effectively improved.

The present invention discloses a satellite gravity collaborative forward simulation method for monitoring changes in confined water reserves, which comprises the following steps: S1: obtaining boundary and longitude and latitude information of a preset study area, and determining the boundary and longitude and latitude information of a preset background area according to a range that may be affected by an error; S2: obtaining monthly-scale monitoring well water level data, empirical values ​​of water supply degree in the background area, GRACE / GRACE-FO monthly-scale gravity satellite time-varying gravity field data, and non-groundwater component data based on the boundary and longitude and latitude information of the preset background area; S3: obtaining a monthly time series of groundwater reserve changes containing leakage errors; S4: obtaining a monthly time series of phreatic water reserve changes; S5: obtaining a monthly time series of confined water reserve changes on a 0.5° grid containing leakage errors; S6: running a preset iterative forward simulation algorithm; and S7: obtaining a corrected monthly time series of confined water reserve changes in the preset study area.

The invention relates to the technical field of constructional engineering, and discloses a joint box of an underground diaphragm wall socket joint, which comprises box pipes, side plates and a back plate, the whole box pipes are of a square pipe structure, and the two box pipes are arranged side by side; the back plate is a square plate, the number of the side plates is two, and the two side plates are fixedly connected with the two side edges of the back plate respectively. The side plates and the back plate form a C-shaped structure, the box pipe is arranged between the two side plates, and the box pipe is fixedly connected with the back plate; the top ends of the box pipes are provided with connecting male heads, the bottom ends of the box pipes are provided with connecting female heads, and adjacent connector boxes are connected through the connecting male heads and the connecting female heads of the box pipes. The connector box has the advantages of being good in overall stress performance, high in structural strength and rigidity, capable of preventing confined water from leaking and the like, and the market application prospect is wide.

The utility model discloses a pressure type precast pile structure, which is applied to uplift pile engineering in the anti-floating field and comprises a pile body structure, an end plate, a prestressed tendon rod body, a locking device and a pile tip. The pile body structure is a cylinder structure made of a reinforced concrete material, and the center of the pile body structure is a longitudinal through inner cavity; the end plates are metal steel plates and arranged at the two ends of the pile body structure. The prestressed tendon locking devices are located at the two ends of the pile body structure and can fix the prestressed tendon rod body and lock the pretensioning force borne by the prestressed tendon rod body to the end plates. The pile tip is of a conical structure formed by rolling a metal plate and is welded to the bottom of the pile body structure. Through mutual cooperation of the components, the pressure type precast pile structure which is internally provided with the prestressed tendon rod body and locks prestress borne by the prestressed tendon rod body at the two ends of the pile body structure is formed, and the problems that a conventional precast pipe pile is low in single pile bearing capacity, cracks are prone to being generated, durability is poor, and confined water cannot be resisted are solved.

The invention discloses a complete-set jet grouting construction method under the condition of high confined water, belongs to the technical field of jet grouting pile construction, adopts jet grouting equipment for construction, and comprises a drill rod, a drilling machine, a steel sleeve, an electromagnetic valve and a pressure gauge, the steel sleeve is inserted into a designed hole site, and one end, above the ground, of the steel sleeve is a semi-closed end; a lateral circulation pipe is arranged on the portion, above the ground, of the steel sleeve, an electromagnetic valve and a pressure gauge are arranged on the lateral circulation pipe and are in signal transmission, and opening and closing of the electromagnetic valve are controlled by a pressure threshold value monitored by the pressure gauge. Performing trepanning construction; embedding a steel sleeve; performing rotary spraying construction; and carrying out slurry returning treatment to finish construction. According to the method, under-pressure plugging is conducted on the slurry return channel of the jet grouting pile in the construction site below the water level, and the influence of confined water on the jet grouting pile is reduced to the maximum extent.

The invention discloses a heat pump pressure-bearing system with coupled operation of primary heating and cyclic heating. The heat pump pressure-bearing system comprises a compressor, a heating water tank, a water supplementing tank, a heating structure, a defrosting structure and a circulating structure. Water is supplemented to the pressure-bearing water tank by opening the fifth water stop valve, closing the first water stop valve, the second water stop valve, the third water stop valve, the fourth water stop valve and the sixth water stop valve, the first water stop valve, the third water stop valve, the fourth water stop valve, the fifth water stop valve and the sixth water stop valve are closed, the second water stop valve is opened, a cyclic heating mode is carried out, and a unit is started for cyclic heating till T3 is 55 DEG C; then the second water stop valve is closed, the first water stop valve and the third water stop valve are opened, a primary heating mode is carried out, primary heating is carried out in the unit to 55 DEG C, the temperature T1 reaches 55 DEG C, and the unit enters the heating water tank until the water temperature T2 of the water supplementing tank reaches 55 DEG C, so that the process is completed; and after heating is completed, a third water stop valve and a first water stop valve are opened to conduct water guiding and a primary heating mode.

The utility model relates to a water-collecting well construction device under special geological environment of rich water, confined water or quicksand, which comprises a steel caisson used for being placed on a foundation to isolate river water, confined water or quicksand; the reinforcement cage is fixedly arranged between the steel caisson and the wooden box; the wooden box is detachably arranged in the steel caisson; the water pumping pipe is fixed to the outer side of the steel caisson and used for being connected with a vacuum pump to pump out water in the foundation. The utility model relates to a water-collecting well construction device in special geological environments rich in water, confined water or quicksand, which can well solve the construction problem of water-collecting wells in special geological environments rich in water, confined water, quicksand and the like, is particularly suitable for water-collecting well construction in special geological environments with medium scale, water insulation and difficult precipitation, and belongs to the technical field of building construction.

The application discloses a kind of along empty roadway short working face coal seam floor high pressure water freezing outburst prevention control method, belong to coal underground mining floor water inrush prevention technical field, comprising the following steps: S1: determine the process parameters of freezing method, and the high pressure water of coal seam floor is detected;S2: first mining area is arranged;S3: excavate freezing chamber and install freezing equipment;S4: construction extends to aquifer freezing borehole;S5: install freezing pipeline and carry out freezing operation;S6: floor high pressure water is pumped out;S7: hydrologic observation borehole is constructed in along empty roadway floor;S8: first working face is mined and excavates second working face recovery roadway;S9: excavate second working face freezing chamber and construction freezing borehole;S10: freezing equipment completes relocation operation before first working face stop mining;S11: repeat S5 to S10 step realizes mining area working face safe mining.The application has the advantages that: it is favorable to improve the production efficiency of mine, and the safety of production is guaranteed.