179results about "Material fill-up" patented technology

This invention relates to the field of mechanical property monitoring technology for mine backfill bodies, specifically to a system and method for acquiring and analyzing tensile strength data of mine backfill bodies. The system comprises a data acquisition unit, a physical information coupling unit, a tensile strength inversion unit, and a spatiotemporal evolution mapping unit. This invention acquires the waveguide flight time and energy attenuation coefficient of the backfill body using an embedded guided wave sensor array. It uses the monotonically increasing law of hydration degree as a physical constraint to train the physical information coupling network, outputting a compliant hydration degree time series. Based on a hydration degree-tensile strength mapping relationship library, it inverts and fits to generate a strength growth curve, which is then loaded into a four-dimensional digital twin model to invert the internal tensile strength gradient field. It automatically identifies local abnormal regions where the growth rate is below the safety threshold, improving the physical rationality and accuracy of the inversion results, and realizing visualization of the spatiotemporal evolution of backfill body strength and early safety warning.

This application discloses a recyclable backfill retaining wall and its rapid construction method, belonging to the field of backfill mining. The recyclable backfill retaining wall includes a recyclable retaining wall structure, a backfill body, and filter elements. The recyclable retaining wall structure is installed on the side of the surrounding rock close to the ore body, extending along the length of the surrounding rock and forming a backfill space with the surrounding rock; the backfill body is installed within the backfill space; the filter elements are installed between the backfill body and the recyclable retaining wall structure, and are located at the bottom and top of the backfill body. The recyclable backfill retaining wall provided by this application, with the recyclable retaining wall structure forming a backfill space extending along the length of the surrounding rock for filling the backfill body, effectively increases the contact area between the backfill body and the recyclable retaining wall structure, thereby effectively dispersing the pressure of the backfill body on the recyclable retaining wall structure, and thus effectively improving the stability and reliability of the recyclable retaining wall structure, ensuring production safety.

The present application relates to the field of mining area subsidence reduction and filling mining, in particular to a floor isolation grouting filling control surface subsidence mining method; a certain thickness of rock stratum is selected as a floor pressure bearing protective layer below a floor failure zone, the floor pressure bearing protective layer arches under grouting pressure, but no fissure leading to the upper floor failure zone is generated; the floor pressure bearing protective layer bottom interface is taken as a grouting layer, a grouting borehole is connected to the grouting layer; working face mining is carried out, when grouting filling can be carried out, filling slurry is injected from the grouting borehole to the grouting layer. The filling slurry lifts the floor grouting pressure bearing layer and the floor failure zone under high pressure, finally fills the entire goaf, reduces the breaking degree of the coal seam roof, controls the subsidence amplitude of the overlying strata, and further reduces the surface subsidence amplitude. In the present application, the mining and grouting filling processes are separated, the influence of grouting filling operation on working face mining is avoided, and the present application is particularly suitable for coal mine areas with dense buildings.

The utility model relates to a tail sand filling structure for strong rock blast damage area repair, its characterized in that: including being located in the roadway surrounding rock and rock blast damage area inside a plurality of support anchor rods, grouting anchor rod and partition, the first end of grouting anchor rod and support anchor rod all are fixed in the bedrock of roadway surrounding rock and rock blast damage area, the partition that is set up interval on grouting anchor rod and support anchor rod is covered with a plurality of, with the roadway surrounding rock and rock blast damage area is divided into first partition area, second partition area and third partition area, first partition area, second partition area and third partition area in respectively grouting have slurry to form tail sand filling layer, transition buffer layer and surface protection layer, this tail sand filling structure for strong rock blast damage area repair reasonable in design can realize the repair of rock blast damage area and improve the mine safety.

The method of deep hole static fracturing combined with blasting for recovery and dilution control is as follows: the surrounding fracturing holes are arranged in the edge area of the two-step stope adjacent to the one-step filling body, the blasting deep holes are concentratedly arranged in the core area of the ore body in the middle of the stope, the blasting deep holes and the auxiliary blasting holes are arranged in parallel, the auxiliary vibration hole blasting auxiliary hole is arranged in the middle, the joint operation ore falling process strictly follows the order of “first static fracturing and then sublevel blasting”, the precise partition of blasting load and fracturing weakening is realized, the direct damage of blasting vibration to the filling body is maximally isolated, and there are six process steps and conditions, which can solve the technical problems of high ore dilution rate caused by the mixing of filling body and ore pile due to insufficient filling body strength or complex construction in the recovery process of existing two-step stope, and can also consider safety, process simplification and dilution control.

A kind of waste rock-paste cooperative filling construction composite isolation layer multi-section high and steep goaf treatment method belongs to underground mining technical field. At the junction of upper and lower sections, a composite isolation layer of "pillar + high-strength cemented paste" is constructed to realize rigid support and flexible cushioning. Above the isolation layer, a combined filling mode of "waste rock + low-strength paste" is used. Through waste rock dumping and filling to build slope and low-strength paste covering, a cooperative bearing structure is formed. The advantages are that the composite isolation layer not only protects the lower unsampled ore, but also realizes ground pressure control through waste rock paste filling, reduces filling cost, and controls the subsequent ore dilution rate below 8%, reduces the comprehensive filling cost by 25%-35%. It is suitable for complex goaf treatment and sublevel mining scenarios in deep metal mines, coal mines and other underground mines.

The present application relates to the technical field of mine filling crushing, and discloses a low-energy-consumption crushing and slurry modulation process for mine filling aggregate, which comprises the following steps: preparing a matrix slurry with non-Newtonian fluid characteristics, mixing coarse aggregate into the matrix slurry to form a crushing medium; controlling a crusher to apply crushing pressure in pulse strokes, so that the loading acceleration of the crushing load reaches a shear thickening threshold, the matrix slurry is induced to convert from a flow state to a quasi-solid state, a liquid-phase force transmission medium is constructed between the coarse aggregate, and the pressure load is directionally conducted along the coarse aggregate joint surface; and monitoring the current fluctuation characteristics of a motor and adjusting the feeding proportion of the matrix slurry and the coarse aggregate. The present application utilizes the shear thickening phenomenon to construct an efficient stress conduction path, reduces the crushing energy loss, utilizes the matrix slurry to capture new fine particles, prevents over-crushing and secondary grinding, and realizes the integration and cooperation of crushing and slurry modulation.

This invention discloses a method for coordinated unloading-support-filling roadway protection in a longwall mining face of a steeply inclined coal seam. The method includes: arranging pre-reinforcing anchor bolts and cables at certain intervals in the transport roadway to reinforce the transport roadway in advance; pre-excavating a gap in the upper side of the transport roadway by blasting, and adding reinforcing anchor bolts and cables to the cross-section of the pre-excavated gap; arranging pressure-relief boreholes at certain intervals in the center of the coal seam roof at the pre-excavated gap, and implementing pressure-relief blasting after the support is moved; using I-beams and retractable modular roadway protection supports as the first and second layers of rock-blocking support, respectively; filling and sealing the goaf area above and on the sides of the retractable modular roadway protection supports with local filling materials; and arranging single hydraulic props for delayed support at a certain distance from the coal wall of the lagging face inside the roadway along the goaf. This method provides good support, significantly increases the speed of roadway retention in a longwall mining face of a steeply inclined coal seam, and effectively ensures safe and normal production.

The application discloses a kind of based on prospecting auxiliary river control and remote control ore drawing irregular hard-to-mine ore body high-efficiency mining method, it is applicable to the underground metal mine irregular hard-to-mine ore body stoping of inclination 10~60°, thickness 6~15m.This method is first based on ore body inclination difference design stope height, then in turn implement exploration and mining integrated preparation control ore, full-face collaborative rock drilling control lean, millisecond accurate segmented blasting, phased man-machine isolation remote control ore drawing and goaf filling;Through 2 prospecting auxiliary rivers, the ore body control accuracy is improved to 25m, combined with deep and shallow hole full-face hole arrangement, local charging, digital detonator accurate initiation, with conventional shovel-truck main ore drawing + remote control shovel-truck finishing ore drawing.The application breaks the industry technical prejudice that irregular thin ore body cannot adopt single segmented deep hole concentrated caving, realizes mining loss and dilution double low control, whole man-machine isolation ensures operation safety, while greatly reducing mining and cutting engineering quantity and stoping cycle, reduces comprehensive cost, process adaptability is strong, engineering popularization value is remarkable.

The present application relates to the technical field of mining engineering, and discloses a kind of gently inclined extremely thin lode reserved strip column horizontal deep hole mining method, by gently inclined extremely thin lode reasonable division ore block, top column, bottom column and strip column are reserved, both can rely on column body support roof, improve stope stability, also can be separated by strip column room, optimization stoping layout, simultaneously adopt horizontal deep hole differentiating charge blasting, with cutting up mountain as compensation space double-side retreat mining, initial section uses continuous charge, after blasting, connect each room, guarantee ore pass smooth, subsequent non-continuous charge is used, avoid the area where top column, bottom column and strip column are located, only lateral caving ore is implemented to room section, realize accurate ore stoping, reduce dilution rate, and top column and bottom column reserved replace traditional artificial filling retaining wall, only a small amount of retaining wall is needed to build, save cumbersome procedure, greatly improve efficiency and reduce cost, simultaneously simplify process, improve operation safety, realize extremely thin lode safe, efficient, low-cost mining.

The application discloses a kind of downhole filling hole fast construction method, it is related to mining exploitation technical field, and its technical scheme main point is: the construction method includes equipment preparation and installation, installation wellhead device, pneumatic down-the-hole hammer percussion drilling, borehole inclinometry, down filling pipe and well cementation etc. steps.Compared with prior art, mainly corresponding adjustment is made to equipment preparation and installation, installation import device, pneumatic down-the-hole hammer percussion drilling three steps, solve the problem of large equipment size, disintegration difference, improve the efficiency of drilling rock, solve the problem of dust flying, realize from surface to downhole any middle section construction through construction filling hole, realize environmental protection construction, realize the green, cycle and sustainable development of mine.

The application provides a gob roof impermeable system and an impermeable method thereof, which comprises a hanging unit arranged at the back side of a working face, an impermeable layer unit for laying on the top of a filling body, and a control unit in signal connection with the impermeable layer unit, wherein the impermeable layer unit is arranged on the hanging unit; the control unit is arranged to obtain a pushing speed parameter of the working face and an injection speed parameter of the filling body, and to control the laying speed of the impermeable layer unit according to the parameters, so as to realize dynamic matching of the laying speed of the impermeable layer unit, the pushing speed of the working face and the injection speed of the filling body. The impermeable layer assembly is laid synchronously with the working face advancing, and is adjusted in real time through the control assembly to adapt to the roof deformation and the dynamic change of the filling body; the system is integrated in a hydraulic support to realize integrated operation of "mining-filling-impermeable", without additional downtime, and the mining efficiency is improved; through reliable impermeability, the sealing efficiency of carbon fixation and filling is greatly improved, and the mine realizes negative carbon mining.

The application discloses a double-channel downward fan-shaped medium-deep hole segment filling mining method, and belongs to the technical field of mine engineering. The fan-shaped medium-deep hole is constructed and arranged in the preset operation space of a two-step mining stope, and for the specific position of the one-step mining filling body boundary, two rows of blast holes adjacent to the boundary are arranged as parallel holes parallel to the filling body boundary, which is different from the remaining fan-shaped blast holes, forming a differential blast hole arrangement form of the two-step mining stope, so that the blasting stress wave is incident to the ore body and the filling body interface at a vertical angle, the intensity of the reflected tensile wave when the wave is vertically incident is smaller than that when the wave is incident at an included angle, the energy wave transmitted into the filling body is also correspondingly reduced, so that the internal splitting and crack expansion of the filling body caused by blasting are weakened, and the stability of the filling body boundary is protected.

The utility model provides a kind of tamping mechanism for end support, and the tamping mechanism includes base, swing beam swingable in vertical plane and tamping telescopic beam arranged in the swing beam, first rotating assembly is provided on the base, the end of the swing beam is provided with second rotating assembly, the first rotating assembly is rotatably connected with the second rotating assembly, to drive the swing beam relative to the base horizontal rotation.This tamping mechanism is installed in end support rear portion, and it has the advantages of simultaneously controlling the stability of top plate and roadway side slope, increasing gangue compactness etc..

This invention relates to the field of constructing mechanical models for paste-filled mining, and particularly to a method for calculating the roof movement and deformation characteristics in paste-filled mining. The method includes establishing a mechanical model for upper-layer paste-filled mining, treating the immediate roof as a roof beam after upper-layer paste-filled mining, simplifying the upper layer as an elastic foundation, and establishing a mechanical model for the first layer of mining; solving the upper-layer mining mechanical model. A mechanical model for lower-layer paste-filled mining is then established, based on the elastic foundation theory, treating the immediate roof as a roof beam, and considering the two layers of filling, the solid coal support area, and the lower-layer filling hydraulic support roof control area as elastic foundations, establishing a segmented non-uniform combined elastic foundation beam model; solving the lower-layer paste-filled mining mechanical model. This invention studies the deflection and deformation law of the immediate roof after working face mining, especially after layered mining, based on the basic principles of elastic foundation beams, laying a theoretical foundation for selecting process parameters for paste-filled mining in working faces.

The present application discloses a kind of open coal mine shallow goaf exploration management method, including construction near horizontal exploration directional drilling and determine goaf boundary, determine whether there is governable cavity in goaf, if yes, then management, if not, then end work;Mark ground engineering safety area;In ground engineering safety area, construction is connected with goaf Inclined filling drill hole;In the inclined filling drill hole, laser radar is lowered into to obtain scanning result;According to scanning result, the number of inclined filling drill hole that needs to be drilled is determined, and the supplementary construction of inclined filling drill hole is completed;One inclined filling drill hole is used as gas discharge channel in goaf, and the rest of the inclined filling drill hole is used as goaf filling channel, and solid waste material is sprayed into goaf by gas jet filling system;After the end of solid waste material delivery, grouting is injected into goaf through inclined filling drill hole and near horizontal exploration directional drilling respectively and is cured;Through inclined filling drill hole, grouting is supplemented, and the exploration management of goaf is completed.

The present application relates to the technical field of coal mining, and provides a supporting device. The supporting device comprises an outer supporting member, a flexible filling bag, concrete and a plurality of filling pipes. The inner part of the outer supporting member is provided with a first cavity, and the top part is provided with an opening. The flexible filling bag is arranged in the inner part of the first cavity, and the top end protrudes from the first cavity. The inner part of the flexible filling bag is provided with a second cavity. The concrete is arranged in the inner part of the second cavity. The plurality of filling pipes are arranged in the height direction of the outer supporting member at intervals, and each filling pipe sequentially penetrates the side wall of the outer supporting member and the flexible filling bag, and is embedded in the inner part of the concrete. The inner part of the filling pipe is provided with a filling material. The present application solves the defect that the concrete pillar cannot be dumped after being reused in the existing technology, realizes controllable destruction and dumping of the pillar after the reuse of the roadway is completed, thereby effectively managing the end head overhang, reducing the advance stress appearance and preventing the coal wall spalling.

The present invention relates to the technical field of green backfill mining in coal mines. Disclosed are a multi-source solid waste backfill slurry and a preparation method therefor. Raw materials for the multi-source solid waste backfill slurry include: a multi-source solid waste material, a waterborne epoxy resin, a curing agent, a waterborne acrylic resin, and polyacrylic acid. Raw materials for the multi-source solid waste material include: tailings, desulfurized gypsum, fly ash, and gasification slag. The raw materials used in the present invention are all green and environmentally friendly raw materials, various types of solid waste materials feature low costs, and the entire preparation process requires no addition of cement, effectively reducing the cost of backfill mining in coal mines; moreover, efficiently and rationally utilizing various types of solid waste materials reduces surface accumulation, and vigorously promotes the green mining process of coal, thereby providing a brand-new green backfill approach for cemented backfill mining, and achieving significant social and economic benefits in ensuring safe and low-cost mining of mines.

The present application relates to the technical fields of mine support and filling, and discloses a large-mining-height lane type filling body-frame combined bearing structure and a mounting method, wherein the large-mining-height lane type filling body-frame combined bearing structure comprises a bearing structure, an adjusting assembly, a protective net and a connecting assembly; the bearing structure comprises a plurality of cross braces and side braces for connecting the cross braces, the side braces are arranged at two ends of the cross braces, the adjusting assembly is mounted at one end of the cross brace, and the protective net is fixedly mounted on the side brace; the top end of the connecting assembly is used for being connected with a roof anchor rod head at a corresponding position, and the bottom end of the connecting assembly is connected and fixed with the cross brace. The bearing structure and the mounting method are simple and efficient, can improve the stability of a mining lane coal pillar side slope and a filling body side slope, can improve the anti-deformation capacity of the filling body when being cast in the filling body, and are favorable for safe, efficient and rapid mining of the lane.

The application discloses a kind of coal mine goaf collaborative filling device and construction method, including scraper conveyor, coal mining machine, paste-gangue solid waste filling hydraulic support, gangue-paste filling body, filling flexible membrane, combination switch, forepoling, transfer machine, split type rear retaining wall lower retaining wall, paste filling body, split type rear retaining wall upper retaining wall, rear top beam, front top beam, split type retaining wall gangue throwing window, split type retaining wall paste filling window, working face gangue belt conveyor, underground gangue crushing device.Underground gangue screening device is matched with ground pulp preparation and transportation to realize gangue underground direct filling and paste long-distance transportation collaborative operation.Forepoling is adapted to large mining height broken roof support, and combination switch uniformly controls the operation of whole machine.The application realizes coal mine solid waste underground resource utilization, goaf collaborative filling and green mining, and is suitable for mine ecological protection, coal gangue reduction, construction waste and other solid waste harmless treatment.

The present application belongs to the field of coal mine filling mining, and particularly relates to a method for overburden grouting and filling mining under the condition of large mining width, which comprises the following steps: selecting an overburden grouting layer; leaving a section coal pillar between a working face to be mined and an adjacent working face that has been mined, wherein the width of the section coal pillar can meet the requirement of keeping stable before the basic roof collapses after the working face to be mined is mined, and the section coal pillar loses stability after the basic roof collapses; constructing a plurality of grouting drill holes along the advancing direction of the two working faces at intervals; mining the working face to be mined, and performing grouting and filling from the grouting drill holes. The width of the section coal pillar is specially designed, the section coal pillar keeps stable in the area where the basic roof has not collapsed, which is beneficial to normal mining and grouting and filling; with the continuous advancing of the working face, the basic roof breaks, the section coal pillar gradually loses stability, and the goaf gradually transfers to the separation position, which is beneficial to the grouting and filling work and the disposal of gangue.

The utility model discloses a filling device for ore body goaf and relates to goaf filling technical field, including tracked chassis and baffle, the top of tracked chassis is fixed with support plate, the top of support plate is fixed with the lifting assembly for controlling the up and down of baffle, one side of baffle is fixed with support seat, the top of support seat is fixed with swivel joint and first motor respectively, the outer surface of the rotation pipe of swivel joint is equipped with first gear, the rotation end of first motor is fixed with the second gear that engages with first gear. The utility model traditional filling device is limited because of angle adjustment, and it is easy to cause material accumulation or void residual. The device can realize multidimensional coverage through the horizontal rotation and vertical swing function of filling head, and ensures that material is evenly distributed. The filling head supports height, horizontal angle and pitch angle adjustment, and can accurately cover different areas of goaf.

This application discloses a pulse adjustment device and a fluid delivery system, relating to the field of fluid delivery technology. It enables precise adjustment of pulses during fluid delivery, improving delivery efficiency and extending equipment lifespan. The pulse adjustment device includes a balance cylinder and a compression cylinder. The balance cylinder houses a piston assembly, with a flow passage chamber on one side of the piston assembly and an oil passage chamber on the other side. The flow passage chamber is connected to a delivery pipeline. The compression cylinder has an oil storage chamber connected to the oil passage chamber, allowing hydraulic oil in the storage chamber to flow into the oil passage chamber. The storage chamber also stores compressible gas. Fluid flowing from the delivery pipeline into the flow passage chamber exerts a first pressure on one side of the piston assembly, while hydraulic oil flowing from the storage chamber into the oil passage chamber exerts a second pressure on the other side of the piston assembly. Under the influence of these first and second pressures, the piston assembly reciprocates to adjust the inflow rate of fluid from the delivery pipeline into the flow passage chamber. This application is applicable to fluid delivery scenarios.

This utility model discloses an anti-clogging paste thickener, relating to the field of mine backfilling technology. The utility model includes a pump inlet pipe, a connecting cover fixedly installed at the lower left end of the pump inlet pipe, and an installation cover fixedly installed at the lower left end of the connecting cover. A turntable is rotatably connected to the lower left side of the installation cover, and an internal gear ring is fixedly connected to the outer periphery of the upper right end of the turntable. A gear one is rotatably connected to the upper part of the installation cover, and the gear one meshes with the internal gear ring. A rotating shaft is rotatably connected to the center of the installation cover, and a gear two is fixedly installed to the outer periphery of the rotating shaft, and the gear two meshes with the gear one. This utility model achieves both intermittent direct propulsion of the backfill material through rotating helical blades, thus avoiding blockage of the backfill material and ensuring the normal operation of mine backfilling.

The application discloses a dry ash pneumatic separation layer injection method and system, and relates to the technical field of rock and soil engineering, and comprises the following steps: receiving target separation layer parameters and dry fly ash parameters, wherein the target separation layer parameters comprise a separation layer depth and a separation layer space volume, and the dry fly ash material parameters comprise a material particle size distribution and a material humidity; inputting the target separation layer parameters and the dry fly ash parameters into a pre-established injection control model, outputting to obtain pneumatic injection control parameters, and performing a dry ash pneumatic separation layer injection operation based on the pneumatic injection control parameters; wherein the pneumatic injection control parameters comprise a compressed air delivery air pressure, a gas flow and an ash injection amount.

This invention relates to a method for replenishing goaf during underground coal gangue mining, comprising the following steps: a. excavating a return airway in the upper part of the working face and excavating a transport roadway and an auxiliary roadway in the lower part of the working face; b. advancing the working face mining area and drilling directional grouting boreholes along the dip from the auxiliary roadway into the roof above the working face, the horizontal section of the directional grouting boreholes being located within the roof strata above the working face; inserting a grouting pipe with an outer diameter matching the diameter of the exposed borehole into the directional grouting borehole; c. mining the working face, and when a grouting pipe is exposed, grouting is performed through that grouting pipe to fill the goaf, repeating this process until the entire working face replenishment operation is completed. This invention utilizes the working face layout method used in high-intensity mining in western mining areas for replenishing goaf during mining, avoiding mining-replenishment interference and increasing the amount of gangue discharged through grouting.