30 results about "Chemical grouting" patented technology

The utility model discloses a concrete equipment crack chemical grouting repairing device which comprises a device body, a cart is arranged on the device body, a mixing tank is arranged on one side of the upper portion of the cart, a stirring mechanism used for mixing and stirring raw materials is arranged above the mixing tank, and the stirring mechanism is connected with the cart. A wall scraping mechanism used for scraping slurry adhered to the inner wall of the mixing tank is fixed to the stirring mechanism, a supporting frame is fixed to the other side of the upper portion of the cart, a containing plate is fixed to the supporting frame, a winding roller is arranged on the containing plate, a hook is fixed to one side of the containing plate, a handheld electric lifting rod is placed on the hook, and the handheld electric lifting rod is fixed to the other side of the cart. According to the slurry mixing device, raw materials of slurry can be fully stirred conveniently to be more uniform, the phenomenon that the slurry is solidified due to long-time standing can be prevented, the slurry adhered to the inner wall of the mixing tank can be scraped conveniently, cleaning is convenient, manpower is saved, meanwhile, cracks with different depths can be repaired conveniently, and the working efficiency is improved.

The invention relates to the technical field of concrete dams, in particular to a concrete dam deep crack comprehensive treatment method which comprises the following steps: firstly, drilling a crack stopping hole in the tail end of a crack to prevent the crack from extending; then slotting along the crack, burying an exhaust pipe, and sealing the crack; then, deep reinforcement and anti-seepage treatment are carried out step by step, specifically, grouting seam penetrating holes are drilled, superfine cement grout is poured, chemical grouting seam penetrating holes are drilled in the upstream face, and epoxidation chemical grout is poured; then, an SR anti-seepage cover plate is pasted on the upstream face crack area; and finally, integrally spraying a polyurea coating. By means of the multi-layer treatment process combining structure reinforcement and flexible seepage prevention from inside to outside, the reliability and durability of crack treatment are remarkably improved, the dam face can be kept uniform and attractive in appearance, and the method has the advantages of being reliable in technology, economical and reasonable.

This invention provides a method for reinforcing existing underground shelters and existing underground structures using chemical grout injection, enabling their effective use as underground shelters. [Solution] The method for reinforcing an existing underground structure 11 according to the present invention is characterized by performing ground improvement using a chemical grout injection method on the ground 1 on the outer perimeter of the existing underground structure 11, thereby reducing the saturation of the ground 1 and making it unsaturated, and constructing a buffer body 12 on the outer perimeter of the existing underground structure 11, thereby attenuating energy acting from the outside. Furthermore, if the existing underground structure 11 is an existing underground shelter, a buffer body 12 made of reinforced ground can be formed on the outer perimeter of the underground shelter by chemical grout injection, thereby improving the durability, strength, and safety of the underground shelter against, for example, incoming ballistic missiles.

The invention relates to the technical field of reclamation area foundation reinforcement, and particularly discloses a collaborative resistance increasing construction system and method for a reclamation area multi-stage anchoring uplift pile, through a multi-stage anchoring structure, in combination with a microorganism induction mineralization technology and a power pre-pressing compaction technology, the binding force and uplift performance of a pile body and a soil body are remarkably improved, and the construction efficiency is improved. In addition, an environment-friendly microorganism grouting mode is adopted to replace traditional chemical grouting, and negative effects on the ecological environment are reduced. Vibration and a vacuum drainage process are combined in the pre-pressing compaction process, so that the compaction and consolidation process of the soil body is further accelerated, and the stability of the pile body in a complex soil layer and a marine environment is ensured. According to the scheme, through structure optimization and process collaboration, the bottleneck problem of application of a traditional uplift pile in a reclamation area is solved, and remarkable economic benefits and environmental advantages are achieved.

To provide a reinforcement method of an existing underground structure reinforcing an existing underground shelter and the existing underground structure through a chemical injection method to enable them to be used effectively as an underground shelter.SOLUTION: A reinforcement method of an existing underground structure 11 is to improve durability against energy acting from the outside and / or shield performance against radiation through reinforcing the ground 1 of an outer periphery of the existing underground structure 11 through a chemical injection method to form a buffer body 12 by a reinforced foundation in the outer periphery of the existing underground structure 11. Further, durability, strength, and safety are further improved as an underground shelter against, for example, an incoming ballistic missile by forming the buffer body 12 by a reinforced foundation by injecting chemical in the outer periphery of the underground shelter where the existing underground structure 11 is the existing shelter.SELECTED DRAWING: Figure 1

The invention discloses an underwater chemical grouting device and a grouting method. The underwater chemical grouting device comprises a bottom plate, the material barrel is connected to the bottom plate through a gear box, supporting legs are arranged between the material barrel and the bottom plate, the gear box is connected with a driving motor and provided with a pump, the outlet end of the pump is connected with a pressure gauge, and the pressure gauge is connected with a nozzle through a high-pressure pipe; the device further comprises a pipeline storage mechanism, the pipeline storage mechanism is arranged on the bottom plate and close to the pressure gauge, and the high-pressure pipe is wound around the pipeline storage mechanism. The long-distance conveying requirement of the grouting device can be met, the high-pressure pipe can be stored conveniently, and the situation that the high-pressure pipe is wound, and consequently the slurry conveying effect is affected is prevented.

The utility model belongs to the technical field of hydraulic engineering, and particularly relates to a chemical grouting hole detection device which comprises an inclination angle measuring disc, a connector, a depth measuring scale and a grip. A solid rolling steel ball abutting against the outer wall of the fixed shaft is placed in the rotating steel ring, a scale pointer is connected to the rotating steel ring, the depth measuring ruler comprises a sleeve and a measuring strip, and the sleeve is welded to the top end of the measuring strip and located in the center. The scale pointer drives the rolling steel ring to rotate around the center of the inclination angle measuring disc under the action of earth gravity, and the included angle between the scale pointer and the measuring strip is the inclination angle of the grouting hole, so that the inclination angle of the grouting hole can be presented in a datamation form, and the depth of the grouting hole is measured through the measuring strip. Finally, whether the inclination angle of the grouting hole meets the construction organization design requirement or not is judged through calculation.

The invention discloses a fast-curing high-permeability chemical grouting material as well as a preparation method and application thereof. The chemical grouting material consists of a material A and a material B, the material A is composed of water glass and a functional additive; the material B is prepared from ethylene glycol diacetate and water; the functional additive is one or a mixture of two or more of a coagulation accelerator, a viscosity modifier, a reinforcing agent and a water-resistant agent; in the material B, the volume ratio of ethylene glycol diacetate to water is 1: (1-3); the volume ratio of the material A to the material B is (60-90): (3-30); the preparation method comprises the following steps: uniformly stirring and mixing the water glass and the functional additive to obtain a material A; uniformly stirring and mixing ethylene glycol diacetate and water to obtain a material B; before grouting, the material A and the material B are uniformly mixed and then immediately used for treatment projects such as reinforcement and water stop in grey sandstone stratums, and the problems that an existing grouting material is high in viscosity, curing time is difficult to regulate and control, and the strength of a cured body is insufficient can be solved.

The utility model relates to the technical field of water conservancy and hydropower engineering, in particular to a high-pressure chemical grouting device for different directions of surrounding rock of a high-pressure water channel system. Comprising a slurry outlet pipe, a slurry inlet pipe, a first sealing element, a second sealing element and micro-expansion quick-setting cement, the micro-expansion quick-setting cement is fixedly arranged outside the slurry outlet pipe and the slurry inlet pipe in a sleeving mode, the first sealing element is fixedly connected with the slurry outlet pipe and located on the slurry outlet pipe, and the second sealing element is fixedly connected with the slurry inlet pipe and located on the slurry inlet pipe. The device can be simply and quickly adjusted to be simultaneously suitable for upward and downward drilling grouting, and the problem that grout in a hole is prone to backflow under high pressure is solved.

The application discloses a coal mine low-permeability sandstone ground water plugging and water reduction method based on sealing utilization, and specifically implements the following steps: step 1, arranging a ground injection well and a pumping and observing integrated well according to parameters of a treatment area; step 2, determining a drilling structure of the injection well and the pumping and observing integrated well; step 3, preparing a calcium hydroxide aqueous solution and an industrial waste gas CO2 aqueous solution; step 4, sequentially injecting the calcium hydroxide aqueous solution and the CO2 aqueous solution into the treatment area, and adjusting injection parameters and determining an end time through monitoring results of the pumping and observing integrated well in the injection process, and ending the water plugging and water reduction work. The application solves the problems of the prior art, such as large viscosity of a cement-based grouting material, difficulty in entering low-permeability sandstone micropores, only macroscopic fissure plugging, poor plugging effect, underground water pollution caused by chemical grouting and unreasonable application of industrial waste gas CO2.

The invention provides a soft rock tunnel large deformation stress release monitoring method, and belongs to the technical field of soft rock tunnel deformation monitoring. Stress component data and displacement vector data of continuous 180 days after excavation are collected, a principal stress value is obtained through coordinate transformation processing, and the stress release rate is calculated; a surrounding rock stress release spatial-temporal characteristic matrix is constructed, singular value decomposition is carried out to obtain a dominant stress release mode, a threshold judgment system based on the principal stress release rate is established to divide the surrounding rock state into a rapid release state, a slow release state and a stable state, and the monitoring frequency and the lining construction time are adjusted according to the judgment result. And a crack network topological graph model is constructed, a crack network connectivity index is calculated through a graph connectivity analysis algorithm, whether a chemical grouting repair program is started or not is judged, and the problem that the judgment of the lining construction opportunity is inaccurate due to the fact that spatial-temporal evolution characteristics in the soft rock tunnel stress release process are difficult to accurately recognize is solved.

The present application relates to the technical field of municipal water supply and drainage engineering, and especially relates to a water supply supporting operation pool uninterrupted water opening access construction method, which constructs a steel cofferdam caisson composed of a water isolation caisson and a pushing fixing device, actively isolates local water pressure to form a dry operation environment, completes accurate opening of a pool wall, additional steel reinforcement, installation of a wall sleeve and secondary pouring of C40 self-compacting concrete in the caisson, realizes multiple sealing by combining three BW water-swelling sealing strips, water intercepting rings and epoxy resin chemical grouting, and pours water balance pressure and removes the caisson as a whole after construction is completed. The present application solves or at least alleviates problems such as water supply interruption, water quality disturbance and approval difficulty caused by traditional water interruption opening construction, and provides a water supply supporting operation pool uninterrupted water opening access construction method.

This invention discloses a method for unidirectional sealing of karst cavities in underground reservoirs using chemical grouting. The method includes steps such as engineering layout and drilling, chemical grouting, and cement grouting. Two parallel rows of grouting holes are set up, one for cement grouting and one for chemical grouting. Drilling is performed according to requirements, with chemical grouting carried out first. Cement grouting can only proceed after the chemical grouting curtain is completed and inspected. Simultaneously, conventional cement grout and unconventional chemical grout are used in combination, leveraging the advantages of both. Cement grouting is used to seal the curtain line and downstream karst cavities along the curtain axis to obtain a higher-strength anti-seepage curtain, achieving the goal of unidirectional sealing of underground karst cavities. This invention has the advantages of ensuring unobstructed upstream water flow, high overall strength of the curtain, and good anti-seepage effect.

The application discloses a kind of pre-embedded pipe earth-rock dam cutoff wall structure and defect detection and repair method, "U-shaped" flower pipe is pre-embedded in cutoff wall and is evenly arranged along cutoff wall axis, and flower pipe is filled with colored dye agent;Through dam body seepage pressure monitoring, colored dye agent migrates with seepage and dam downstream water weir seepage flow changes, the position and nature of earth-rock dam seepage can be preliminarily evaluated;Using the "U-shaped" pre-embedded flower pipe in concrete cutoff wall, the defect of cutoff wall can be detected by pre-embedded flower pipe seepage flow detection, pre-embedded flower pipe seepage digital imaging and pre-embedded flower pipe water pressure test;After accurately detecting the defect of cutoff wall, the grouting repair method in cutoff wall pre-embedded pipe uses pre-embedded "U-shaped" flower pipe to carry out local chemical grouting, low disturbance and high efficiency, realize the accurate repair of seepage cutoff wall.

The invention belongs to the technical field of geotechnical engineering, and discloses a method for mineralizing and reinforcing a high-filled soil body by using nanogel and microorganisms, which comprises the following steps: carrying out multiplication culture and activation on bacillus, preparing response gel, sequentially mixing a NaHCO3 buffer solution, activated bacillus, nanoclay-chitosan composite sol, response gel and a cementing solution into the soil body, and carrying out layered compaction. And the soil body is compacted and reinforced. The technical problems that according to an existing chemical grouting method, due to the fact that the controllability of a mineral deposition space is poor, pore throats are prone to being blocked, drainage is affected, and monomer migration pollutes the environment are solved.

The invention discloses a water gushing treatment method for a tunnel adit, and aims to solve the technical problems that drainage of the tunnel adit is difficult and potential safety hazards exist in a complex strong water gushing environment. Advanced geological forecast is carried out on the tunnel face of the adit by adopting a geophysical prospecting method in combination with a horizontal advanced hole exploration mode, and the geological forecast precision of the unexcavated water-rich section of the adit is improved; through the graded relay drainage system, the technical problem that water burst in the adit moves along with the tunnel face of the adit and is not pumped and drained in time is solved; through the cooperative water blocking structure of advanced fixed-point grouting, system grouting and chemical grouting and in cooperation with a drainage system, groundwater exposure of the water-rich section of the adit is restrained, the current situation that a water curtain hole of the water-rich section of the adit is excavated is effectively improved, and the construction safety coefficient is greatly increased.

A construction method for reinforcing by additionally arranging a steel lining without changing the size of the section of a hydraulic tunnel comprises the steps that the size of the interior of lining concrete of an original tunnel is measured, and a lining steel plate and an annular positioning ring are machined; concrete is chiseled away, and an annular positioning ring is installed and fixed through a chemical anchor bolt; after the bottom of the annular positioning ring is closed and reinforced, the concrete surface is treated with the annular positioning ring as a sample frame; then, lining steel plates are mounted from bottom to top in a fragmented mode and are subjected to spot welding and full welding with the annular positioning ring; chemical grouting is carried out every time one pipe joint is installed; and the longitudinal positioning block is welded before the subsequent pipe joint is mounted. Compared with traditional crack grouting and surface treatment, the lining steel plate is additionally arranged under the condition that the size of the section of the hydraulic tunnel is not changed, the tunnel structure is effectively reinforced while the integrity of the tunnel structure is kept, the problems of hydraulic tunnel diseases such as leakage and strength are effectively solved, the construction effect is effective for a long time, and the construction cost is reduced. And the repeatability of a traditional processing method can be effectively avoided.

The utility model discloses a pesticide grouting pipe for termite control, which belongs to the technical field of termite control and comprises a pipe body component, a conical head component is mounted below the pipe body component, a positioning disc component is mounted on the outer side of the pipe body component, and a bifurcated pipe component is mounted on one side of the pipe body component and positioned above the positioning disc component. An air pump assembly is installed above the pipe body assembly, and a storage stirring device is installed on the side, away from the pipe body assembly, of the bifurcated pipe assembly; the storage stirring device is arranged, so that a worker can store standby medicine through cooperation of a storage barrel, a lifting barrel and other structures when needed, and therefore the work requirements under different conditions are better met; and a worker can stir part of medicines which are not sufficiently mixed and dissolved through cooperation of a motor, a stirring blade and other structures when needed, and then the working capacity of the grouting pipe is improved.

The invention relates to the technical field of hydraulic structure and geotechnical engineering grouting construction monitoring, and discloses a chemical grouting intelligent monitoring method and related equipment, the method comprises the following steps: obtaining core working condition parameters of the whole grouting process, and synchronously collecting the core working condition parameters to obtain basic monitoring data of grouting pressure, grouting instantaneous flow and slurry temperature; performing feature fusion processing on the basis of the basic monitoring data, and constructing a grouting working condition feature vector representing the current grouting state; inputting the grouting working condition feature vector into a preset working condition consistency judgment model, and analyzing the consistency judgment of the current grouting working condition and a preset construction specification through the working condition consistency judgment model to obtain a working condition consistency judgment result; and outputting monitoring information based on a judgment result, and automatically integrating and recording the monitoring information to generate a standardized chemical grouting construction record file. The intelligent monitoring efficiency of chemical grouting is improved.

The invention relates to the technical field of grouting well plugging, in particular to a grouting well plugging construction technology for a through-bottom-plate dewatering well, and solves the problems that the side wall of an existing dewatering well is prone to collapsing in the dewatering process, particularly, the water content of a stratum is high, floury soil easily generates quicksand, smooth water stopping is seriously affected, and when grouting well plugging construction is carried out, the construction cost is low. The well sealing device comprises a dewatering well cavity, the dewatering well cavity is composed of a first grouting cavity and a second grouting cavity, the first grouting cavity and the second grouting cavity are in through connection, a first grouting consolidation body is arranged on the inner side of the first grouting cavity, and a second grouting consolidation body is arranged on the inner side of the second grouting cavity. The chemical grouting method is adopted for water stopping treatment, so that the water permeability of the soil body in the water stopping area is controlled, the consolidation with the improved soil body is enhanced, and the safety of foundation pit basement construction is ensured.

This invention discloses a method for advanced chemical grouting reinforcement of the tunnel face in extremely fractured soft rock, including the steps of grouting conduit installation, grouting pipeline connection, hole sealing operation, and grout injection. After tunnel excavation, the locations of the advanced grouting holes are marked on the tunnel face. Holes are drilled in a staggered arrangement of long and short grouting pipes, and long and short grouting pipes are installed. Grouting solution A and grout B are injected simultaneously in a 1:1 ratio. Grout A is an isocyanate aqueous solution with a density of 1.05±0.05 g / cm3, and grout B is a combined polyether aqueous solution with a density of 1.23±0.05 g / cm3. The mixed grout has a setting time of 15 to 20 seconds, an expansion ratio of 22 to 25 times, and a bond strength ≥3.0 MPa. This invention uses a combined polyether polyol chemical grout, which has low viscosity and strong permeability, and can effectively inject into the micro-fractures in extremely broken soft rock. Not only is the gelation time controllable, but it also has sufficient long-term strength and durability after curing, which can provide a lasting reinforcement effect for the surrounding rock and meet the safety requirements of the entire life cycle of the tunnel.

This invention provides a construction material that is sustainable and environmentally friendly, and a ground improvement method using it, which can be used for structures as well as ground improvement applications, by using materials that can be supplied stably and do not cause environmental problems such as environmental pollution or increased carbon dioxide emissions. [Solution] A construction material whose main component is incinerated ash obtained by burning waste derived from marine and / or land products, wherein amorphous silica incinerated ash is the main component and Ca-containing incinerated ash containing at least Ca is used as a reactant, and which is used for structural purposes or as a solidifying agent in chemical grouting, high-pressure jet mixing, or mixing-type ground improvement methods. A ground improvement method using the above construction material when improving the ground by chemical grouting, high-pressure jet mixing, or mixing-type ground improvement methods.

The invention discloses a coal mine chemical grouting real-time multi-parameter component monitoring system and a coal mine chemical grouting evaluation method, and relates to the field of coal mine safety production, the system comprises a grouting device and a grouting monitor; the grouting device comprises a grouting pump, two material barrels, a flow meter, a pressure regulating valve, a plurality of pressure transmitters, a one-way valve and a plurality of temperature sensors; a flow meter, a regulating valve, a pressure transmitter and a one-way valve are mounted on a connecting pipeline of each material barrel and the grouting pump; temperature sensors are arranged at different depths of the grouting holes; a pressure transmitter is arranged on a connecting pipeline of the grouting pump and the grouting hole; the grouting monitor is used for monitoring, adjusting and displaying grouting parameters in the grouting process in real time. Multi-parameter components in the chemical material grouting process can be monitored in real time, so that parameters in the grouting process are adjusted in time, and the production and safety problems caused by improper control over the grouting parameters are prevented.

The invention relates to the technical field of fireproof materials, in particular to a lightweight acrylate fireproof heat-insulation pouring material and a preparation method thereof, and the lightweight acrylate fireproof heat-insulation pouring material comprises an organic-inorganic hybrid aqueous solution bonding matrix, a viscosity modifier, a lightweight material and a reinforcing material. Compared with an existing lightweight fireproof heat-insulation pouring composite material, the lightweight fireproof heat-insulation pouring material provided by the invention has the advantages that an environment-friendly acrylate chemical grouting material is adopted as a matrix, and the viscosity modifier hollow glass beads are used for adjusting the viscosity of gel; the light filler hollow glass beads, floating beads, closed-cell perlite and expanded perlite serve as an ablation-resistant framework and a heat insulation material, the sepiolite fabric enhances the overall strength, and the material is good in ablation resistance and heat insulation performance at the high temperature for a long time and does not collapse or fall off. The material can be used as a fire-proof and heat-insulation layer pouring material of the safe box, and has good fire-proof and heat-insulation effects on an inner shell of the safe box.

The invention discloses a quick construction method and system for a water-rich section of a small-section open type TBM (Tunnel Boring Machine). Aiming at the technical problems that a tunnel face is easy to collapse, equipment is easy to bury and propelling is difficult when a TBM (Tunnel Boring Machine) is used for constructing a water-rich section tunnel, a three-in-one systematic technical system of advanced geological forecast, process water blocking reinforcement and graded drainage guarantee is constructed; through key technical means such as multi-source fusion geological forecast, graded surface grouting, differentiated chemical grouting plugging and three-level drainage guarantee, the comprehensive technical effects of precise geological risk pre-control, process water blocking efficient plugging and reliable drainage system guarantee are achieved, safe, efficient and continuous tunneling of the TBM in the water-rich section is achieved, and the construction efficiency is improved. And a reliable technical scheme is provided for TBM construction under similar water-rich geological conditions.

The invention discloses a collaborative repair method for sedimentation of a storage tank foundation, and belongs to the technical field of petrochemical engineering. Comprising the steps that S1, the perpendicularity, settlement data and foundation conditions of the storage tank are evaluated, and structural integrity detection is conducted; s2, according to the weight of the storage tank and the settlement condition, jacking point positions are planned, and jacks are arranged; s3, in combination with real-time monitoring of a measuring instrument, the jacking force and height of the jack are accurately controlled through a synchronous control system, and stable leveling of the storage tank is achieved; s4, the number, positions and parameters of grouting holes are planned according to the geological data; and S5, a grouting pipe is pre-buried, and pressure grouting is implemented. According to the method, an evaluation-leveling-reinforcement integrated repair system is constructed, the posture of the tank body is corrected through mechanical jacking, then the bearing capacity of the foundation is enhanced through chemical grouting, cooperative treatment of shape recovery and performance strengthening is achieved, construction is efficient, disturbance is small, safety is high, and the method is suitable for large storage tank foundation settlement repair and has remarkable engineering application value.

The application discloses a construction method of an in-situ grouting water-blocking system of a coal underground gasification isolation wall, and relates to the technical field of coal underground gasification isolation. The method comprises six steps of monitoring deployment, biological barrier construction, initial physical grouting isolation before gasification, chemical grouting barrier construction before gasification, dynamic physical grouting isolation during gasification, and final physical grouting isolation after gasification, integrates physical, chemical and biological triple isolation means, and forms a three-dimensional three-level three-layer grouting isolation system. Meanwhile, in combination with real-time monitoring and cloud intelligent regulation and control, efficient isolation and plugging of the whole process of coal underground gasification is realized, migration and pollution of pollutants to underground water are effectively prevented, geological stability is ensured, and environmental safety guarantee is provided for industrialization of coal underground gasification.

The invention discloses a reverse drainage plugging structure suitable for a concrete faced rockfill dam and a construction method, and belongs to the technical field of water conservancy and hydropower engineering. The structure comprises a drainage steel pipe which is horizontally embedded into a toe board, a special cushion layer area and the cushion layer area, a temporary water blocking structure and a grouting filling layer are sequentially arranged in the steel pipe, a rigid sealing structure is arranged at the outlet end, a sealing material layer is filled between the sealing structure and the toe board, and a concrete protection layer is poured outside the sealing structure. The temporary water blocking structure is composed of fiber filler and a flexible water stopping material, and a chemical grouting guide pipe is pre-buried in the filler layer. During construction, the drainage steel pipe is installed firstly, then the temporary water blocking structure is arranged, then preshrinking mortar is poured, chemical grouting is conducted, finally, the sealing steel plate is installed, the sealing material is filled, and the protection layer is poured. The effects that the drainage path is smooth, plugging is reliable, and construction is convenient and fast are achieved, the influence of reverse water seepage pressure on the dam body is effectively reduced, and the durability and the overall anti-seepage performance of the drainage system are improved.

The invention aims to provide a coal body reinforcement process for a fully mechanized coal mining face passing through a geological structure section, and belongs to the technical field of coal mine reinforcement. Ordinary Portland cement is adopted as a main grouting material, cement grout is injected into a geological structure influence area through drilling, and overall consolidation of broken coal and rock bodies is achieved. The process is simple and convenient to construct, low in cost, non-toxic and harmless, effectively improves the stability of a coal body, reduces the maintenance difficulty and the safety risk, avoids the spontaneous combustion hidden danger possibly caused by chemical grouting, and is suitable for advanced support of key parts such as two gate roadways and a triangular area of a fully mechanized coal mining face.

The application belongs to the technical field of geotechnical engineering, and discloses a method for reinforcing high fill body by nanogel and microbial mineralization, which comprises the following steps: proliferative culture and activation of bacillus, preparation of responsive gel, mixing NaHCO3 buffer, activated bacillus, nanoclay-chitosan composite sol, responsive gel and cementing liquid into the soil in sequence, and layer compaction to realize dense reinforcement of the soil body. The application solves the technical problem of the existing chemical grouting method, i.e. poor controllability of mineral deposition space, easy plugging of pore throat, influence on drainage, and single migration to pollute the environment.