59results about How to "Reduce grouting costs" patented technology

The invention discloses a coal mine tunnel broken surrounding rock layering grouting technology and method. Novel double-fluid inorganic grouting materials are adopted, and the method is matched with a novel grouting hole sealing device to achieve drilling layering grouting. The method comprises the steps that grouting drilling is constructed at first, the dual-layer grouting hole sealing device is adopted for hole sealing, then, grouting materials with the low water cement ratio, high viscosity and high condensation speed are adopted to be used in cooperation with the low-pressure and low-flow grouting technology, an outer layer grouting pipe is utilized for conducting grouting on a surrounding rock shallow layer broken zone to form an effective grouting stopping layer, then, the water cement ratio of the grouting materials is improved gradually, the material permeability characteristics are improved, the material curing time is prolonged, the grouting pressure is gradually improved, and an inner layer grouting pipe is utilized for completing surrounding rock deep layer grouting. The method adapts to surrounding rock failure and permeability characteristic zoned characteristics, the grout leakage problem is effectively solved, and layering grouting in the same drilled hole is achieved.

The invention discloses a method and a structure for reinforcing flat hole grouting roadbed without damaging road surface. The method comprises the following steps of A. determining the positions of grouting holes; B. drilling horizontal or slant grouting holes to ensure that the drilling angle is orthogonal to the main damaging direction of the roadbed; C. striking the grouting holes in an interlaced mode; D. drilling and grouting from the periphery of the damaged roadbed to the inside; E. arranging grouting floral pipes; F. arranging seamless grouting outer pipes at the front ends of the grouting holes which penetrate through the cross section of the roadbed and are dimensionally and crossly distributed; G. uniformly filling cement grouts and determining grouting pressure through tests and areas; and H. performing sedimentation, inclination, deformation and displacement observation on the roadbed surfaces, structures and surrounding buildings during grouting. Horizontal or inclined drilling is carried out on roadbed slopes in the affected area for forming the grouting holes, the grouting floral pipes and the seamless grouting outer pipes are arranged, and the grouting floral pipes are connected with the seamless grouting outer pipes by virtue of joint by screws. The method is feasible and convenient to carry out; because of no-damage road surface structure, the bearing capacity and the stability of the roadbed structure in the affected area are obviously improved, and the reinforcement effect is high.

The invention discloses a surrounding rock supporting construction method of a water-contained roadway of a coal mine and belongs to the field of surrounding rock supporting of underground engineering. The surrounding rock supporting construction method comprises the following steps that (1) primary spraying is conducted after the roadway is excavated; (2) according to the geological conditions of the water-contained roadway, a controllable grouting anchor rod structure is designed, and controllable grouting anchor rod-anchor cable supporting parameters are designed; (3) through the combination of controllable grouting anchor rods, anchor cables, metal nets and sprayed grout supporting, so that a grouting reinforcement waterproof ring is formed, and grout is sprayed onto the surrounding rock on the surface of the roadway; (4) the key portion where supporting needs to be reinforced and water insulation is needed is determined through the field observation technical means such as numerical simulation; (5) the supporting parameters of the water-contained roadway are adjusted and optimized, and grouting reinforcement supporting is conducted on the key portion; and (6) a base plate of the roadway is reasonably supported. The invention further provides a surrounding rock supporting structure. The supporting method and structure are suitable for water-contained roadways with different depths, roadways with broken surrounding rocks, and soft rock roadways; and in addition, construction is easy and convenient, and the supporting method and structure can be popularized within a wide range.

The invention discloses a spalling prevention method through full-length anchoring of a rib with a soft bolt. The spalling prevention method through the full-length anchoring of the rib with the soft bolt comprises the following steps in sequence: (1) utilizing a pneumatic column drilling machine to subject the inside of the coal wall to tiltingly drilling in the middle of a working face, drilling a hole between every two fully-mechanized coal mining supports, wherein the depth of the drill hole is 20-25m, the end of the drill hole is drilled to the inside of a coal seam roof to 1-2m; (2) after the drilling construction, utilizing a grouting pipe to bind a coir rope, utilizing the coir rope as the soft bolt and sending the coir rope to the end of the drill hole; (3) utilizing a pneumatic double-liquid chemical grouting pump to fill the drill hole with chemical pulp to perform full-length anchoring, and enabling the chemical pulp and the coir rope to solidify together to form a super-long bolt; (4) dismantling and moving away the pneumatic column drilling machine and the double-liquid chemical grouting pump; and (5) operating a coal mining machine to start to work to mine coal on a fully mechanized coal mining working face. The spalling prevention method through the full-length anchoring of the rib with the soft bolt has the advantages that the construction is simple, the rib spalling prevention effect is good, the cost is low, the quality of the coal is not affected and the like.

The invention relates to the technical field related to tunnel driving equipment, in particular to a grouting structure in the tunnel driving process and a grouting method matched with the grouting structure. The grouting structure in the tunnel driving process and the grouting method aim at solving the problem that in the prior art, filling a gap in the back portion of a segment cannot be achieved through synchronous grouting. The grouting structure in the tunnel driving process sequentially comprises a rock stratum and a segment stratum inwards from the inner wall of a tunnel, and accordingly a side-top arch, in unit of blocks, is formed. A support frame is arranged between the segment stratum and the rock stratum, and accordingly a hollow interlayer is formed. A base lining platform is arranged on the bottom of the side-top arch, and reserved grouting holes communicating with the hollow interlayer are formed in the positions, corresponding to the side-top arch blocks, of the top of the segment stratum. The reserved grouting holes are moveably connected with grouting pipes, and the other ends of the grouting pipes are connected with a grouting machine. The grouting structure in the tunnel driving process and the grouting method have the beneficial effects that the grouting cost is not increased, the grouting process is smooth, the utilization rate of the grout is high, the structure of equipment is simple, repairing and later maintenance are convenient, the assembling and disassembling time is short, grouting pressure can be monitored at any time, the grouting quality can be guaranteed, and a framework layer is formed on the contact surface between the grout and water glass so that flowing of the grout to a cutterhead can be reduced.

The invention belongs to the technical field of building, and discloses a grouting construction treatment method. The grouting construction treatment method comprises the following steps: determininggrouting parameters according to a practical condition, wherein a slurry diffusion radius R for deep-hole grouting is equal to 500 mm, initial grouting pressure for deep-hole grouting is 0.3-0.75 MPa,final pressure is 1.0 MPa, and grouting can be stopped while slurry inlet amount per minute is smaller than 3 L under a final pressure state or grouting pressure gradually increases under the final pressure state, and binary slurry is grouted as a grouting material, and the slurry setting time is within 1-2 minutes; adopting an existing structure as a wall for grouting, and performing construction treatment on the wall for grouting; drilling grouting holes by a ZLJ-2500 drilling machine, adopting a phi42 hollow drill stem to perform drilling construction, and performing grouting construction.The grouting construction treatment method disclosed by the invention is simple in process, is convenient to operate; and moreover, grouting pressure reaches design requirements, slurry diffusing range is great, the grouting effect is good, and a water and slurry leakage phenomenon is avoided.

The invention discloses a coal gangue based geopolymer grouting material and a preparation method thereof, and belongs to the field of rock mass fracture grouting engineering. The grouting material comprises the following components in parts by weight: 80-85 parts of coal gangue powder, 6-10 parts of slag powder, 3-7 parts of fly ash, 1-4 parts of an alkaline activator, 0.31 part of a surfactant,1-2 parts of a retarder and 0.8-1.2 parts of a water-retaining agent. On the basis of meeting the pressure of coal mine deep high-confined limestone and fracture confined water, the three industrial solid waste raw materials, namely the coal gangue, the slag powder and the coal ash, which are easy to obtain are utilized, the raw materials are low in price, and the cost is relatively low while thetechnical performance requirements of the grouting material are met. The grouting material can be used for preventing and treating water in the coal mine production process, the grouting cost is effectively reduced, the enterprise benefit is improved, and the land pollution risk is reduced.

The invention discloses a back pressure valve and belongs to the technical field of drilling equipment. The back pressure valve comprises a valve body, a valve element, a bearing seat and a valve seat and is characterized in that the bearing seat and the valve seat are arranged in the valve body, the bearing seat is located below the valve seat, a piston is arranged in the valve body and sleeves the valve element, a slurry return hole is formed in the valve body and located between the valve seat and the piston, and the slurry return hole is communicated with the inner cavity of the valve body. The back pressure valve has the advantages that slurry in a well can be automatically filled into a drill pipe, a slurry filling device needs not to be connected to fill the slurry into the drill pipe after each drill pipe part is descended, work amount is reduced greatly, time and labor are saved, slurry filing cost is lowered effectively, the slurry in the well can be prevented from being reversely sprayed into drill pipe through the inner cavity of the valve body, and safety accidents are avoided.

The invention discloses a backpressure valve capable of achieving automatic slurry injecting, and belongs to the technical field of drilling equipment. The backpressure valve comprises a valve body, a valve element and a support base and a valve base which are arranged in the valve body, wherein the support base is located under the valve base. The backpressure valve is characterized in that a piston is arranged in the valve body and arranged on the valve element in a sleeving mode, the valve base comprises an upper valve base body and a lower valve base body, the upper valve base body is located between the piston and the valve body, a slurry reflux tank hole is formed in the upper valve base body and communicated with an inner cavity of the valve body, and a slurry reflux hole is formed in the valve body and communicated with the slurry reflux tank hole. According to the backpressure valve, due to the fact that slurry in a well can be automatically injected into a drill pipe and does not need to be injected into the drill pipe by connecting a slurry injection device to the drill pipe whenever a part of the drill pipe is put down, the work amount is greatly decreased, the slurry injecting cost is effectively reduced, the condition that the slurry in the well is reversely sprayed into the drill pipe through an inner cavity of the valve body is effectively prevented, and then well drilling safety is guaranteed.

The invention belongs to the technical field of construction of tunnel engineering, and particularly relates to a concrete longitudinally-continuous pouring construction method for a tunnel secondarylining vault. The lining quality problems that the arch part concrete cannot be densely packed, the secondary lining is insufficient in thickness, and the back is empty and not dense are solved; the method comprises the following steps that S100, measurement lofting is conducted; S200, a secondary lining trolley is travelled, positioned and reinforced; and S300, a longitudinally-continuous pouringtrolley is in place; S400, secondary lining side wall concrete is poured; and S500, after window-by-window layering pouring and vibrating is finished on the part of the secondary lining side wall concrete, a concrete pump pipe connector is replaced and connected with the longitudinally-continuous pouring trolley, performance detection is conducted on the field secondary lining arch concrete, andthe in-formwork concrete slump degree is required to be controlled to be 170 mm-190 mm; S600, a concrete conveying pump is started; S700, the secondary lining arch concrete is longitudinally and continuously poured in a retreating mode; S800, a station exits and a pipeline is cleaned, and the pouring is ended; and S900, RPC formwork grouting is conducted.

The invention discloses a limited drainage method and a method for optimizing the thickness of a grouting circle of a tunnel by utilizing the limited drainage method, and belongs to the technical field of water proofing and drainage of underground construction. According to the limited drainage method, a water pressure adjusting valve is installed at a water outlet of a transverse drainage blind pipe of the tunnel to control external water pressure acting on a secondary lining of the tunnel, then full play is given to the certain carrying capacity of the lining, the thickness of the grouting circle and the drainage of underground water are reduced as much as possible, and then the environment of the underground water is protected. By means of the method for utilizing the limited drainage method for optimizing the thickness of the grouting circle of the tunnel, through an entire theoretical analysis, water pressure, flow rate and displacement of all modules of a support system are calculated, then design parameters are optimized, the thickness of the grouting circle is greatly reduced, the grouting cost is lowered, and the construction speed is increased.

The invention discloses an inorganic two-component rapid hardening grouting slurry and a preparation method thereof. The grouting slurry is prepared from a component A and a component B according to amass ratio of (0.5-2):1, and the component A comprises, by weight, calcium sulphoaluminate, calcium aluminate, polyaluminum chloride, sodium gluconate, a polycarboxylic water reducer and aluminum sulfate; and the component B comprises anhydrous gypsum, calcium chloride, the polycarboxylic water reducer and lithium carbonate. The prepared slurry has the advantages of low viscosity, good fluidity and strong injectionability, can closely fill large spaces and fine cracks of a goaf, and can be bonded to an earth rock mass to a certain strength after solidifying in order to achieve a good reinforcing effect; the slurry does not shrink after solidifying, so the concretion rate of a reinforcement is 100%; and the final strength can reach 23.6 MPa.

The invention provides a steel tube miniature pile. The steel tube miniature pile comprises a steel tube, an inner slurry layer located inside the steel tube and an outer slurry layer located outsidethe steel tube, and the steel tube comprises an ordinary steel tube segment, an anchoring segment and a fixed end which are connected successively from top to bottom; the anchoring segment is providedwith a grouting hole and a clamping throat for assembling a rubber film, the rubber film sleeves the outer wall of the grouting hole and is used for sealing the grouting hole, and the rubber film isfilled with cement slurry to form an convex structure; and the fixed end is arranged at the lowermost end of the steel tube and used for embedding into a stratum. The invention further provides a specific construction method of the steel tube miniature pile. According to the construction method of the steel tube miniature pile, the situation that grouting slurry in the steel tube does not flow outcan be guaranteed, the problem of slurry runout at the bottom of the pile is solved, the grouting amount is controllable, and the grouting cost is lowered; and meanwhile, friction resistance of the side wall of a pile body can be increased, and the overall compression resistant, anti-pull and axial load resistant capacity of the steel tube miniature pile is improved.

The invention discloses a self-grouting backpressure valve, and belongs to the technical field of well drilling equipment. The self-grouting backpressure valve comprises a valve, a valve element, a valve seat and a supporting seat, and is characterized in that a slide sleeve is arranged in the supporting seat, a lateral hang groove and a vertical slide groove are formed in the slide sleeve and are communicated with each other, the valve element comprises an upper valve rod, a conical block and a lower valve rod which are connected with one another, a guide hole is formed in the valve seat, the upper valve rod can axially move in the guide hole and penetrates the guide hole, and a hang pin is arranged on the lower valve rod and is hung on the slide sleeve. The self-grouting backpressure valve has the advantages that slurry in wells can be automatically poured into drill rods by the self-grouting backpressure valve, accordingly, the engineering quantities can be reduced to a great extent, and the grouting cost can be effectively lowered; self-grouting channels can be forcibly closed in case of well blowout and well overflow in drill-down procedures, and accordingly well blowout and well overflow can be prevented; integral self-grouting actions can be completely carried out without slurry backflow channels on the valve, accordingly, the strength of the valve can be guaranteed, and the service safety and reliability can be improved.

The invention discloses a settlement-limited stoping method for a false mined-out layer support formed in combination with a rock gangue, and relates to the technical field for prevention and controlof mining engineering stoping and surface subsidence. The method comprises the following steps of: matching a rock stratum with a gangue by reinforcing a grout, providing an output pipe on a partitionin a ganguelayer through using stopping, footage and caving time difference, the gravity downflow of the grout and spatial crack rules of the gangue, injecting the grout in a collapsed roof rock layer to form a stable support false layer arranged in sections, and matching with an erected dense and thin wall for ventilation, wherein a first working face adopts b-shaped mining, and the subsequent working faces adopt p-shaped mining; and after a reserved phased roadway is initially collapsed, a reserved liquid supply pipe is used to pour the suspended space of the roadway to form a complete false mined-out layer, and the stratum subsidence and stope water accumulation can be controlled. The stopping method reduces the tunnelling workload of the working face, and can control the surface settlement effectively, and the mining of mineral resources can be completed under the conditions of low cost, high recovery rate and environmental protection.

The invention provides an aquifer water outlet section positioning system and method adopting distributed acoustic sensing equipment. The system comprises a logging winch and a fixed pulley. One end of a single-mode logging steel wire optical fiber is arranged on the logging winch, and the other end of the single-mode logging steel wire optical fiber bypasses the fixed pulley and extends into the hydrogeological exploration drill hole; the single-mode logging steel wire optical fiber is sequentially connected with a display screen, measurement and control and signal processing equipment, distributed acoustic sensing equipment, a drilling depth recorder and an optical fiber balance weight from left to right. According to the method, a single-mode logging steel wire optical fiber is adopted as a sensor, a distributed acoustic sensing device is adopted to inject an enhanced linear sweep frequency optical pulse into the single-mode logging steel wire optical fiber, and a measurement and control and signal processing device is adopted to process a backward Rayleigh scattering signal fed back after transmission in the single-mode logging steel wire optical fiber. And a differential phase signal is obtained, so that the accurate positioning of the water outlet section of the top plate ultra-thick sandstone aquifer can be realized.