3303results about "Mine roof supports" patented technology

The invention discloses a quick supporting method for large-deformation roadway easy to fall, break and loosen and an apparatus thereof. The method comprises the following steps of: (1) clearing away the loose stones on the wall of the surrounding rock of the roadway; (2) hanging a reinforcing steel bar mesh along the digging outline of the roadway and initially spraying one thin concrete layer; (3) arranging an anchor rod in the drill hole of the roadway wall; (4) arranging a side-wall steel grating arch to support the surrounding rock of the side wall; (5) arranging a top-supporting steel grating arch, touching the top and supporting the upper surrounding rock; (6) clearing away the floating slag at the bottom of the roadway, arranging a steel grating arch of the inverted arch, supporting and sealing the system into a ring; (7) carrying out the cement injection construction on the anchor rod; (8) welding the exposed part of the cement injected anchor rod on the steel grating arch to form a whole structure; and (9) multi-spraying concrete or steel fiber concrete along the roadway wall. The apparatus comprises an anchor rod, a side-wall steel grating arch, a steel grating arch of top arch, a steel grating arch of inverted arch, and a concrete spray layer of reinforcing steel bar. The invention has the advantage of remarkable support effect, simple method and convenient operation and solves the problem that the bracket and the surrounding rock are not adhered tightly.

A coal mining solid filling method comprises following steps: using the stacked solids on the ground as the filling materials for the working surface goaf, directly putting the solid filling materials from the ground to a belt conveyor in the underworkings by a perpendicular feeding well, transporting to the end of a coal face through the underground belt conveyor, reloading the solid filling materials to a solid filling mining conveyor hung under a back tail beam of a self-impacting type filling hydraulic support by a self-moving type filling material reloading machine. In the process of mining work, the coal is mined and the filling materials are filled on the bottom; and the solid filling materials are compacted by means of a compactor of the self-impacting type filling hydraulic support. The method solves the problem of coal compaction under the building and low coal recovery.

The invention relates to an intelligent type full-automatic combined coal mining system, which comprises a coal mining and loading device, a conveying device, a supporting device, and an equipment train, and is mounted in the working face and crossheading in the coal mine well. The coal mining and loading device is mounted on the conveying device, the coal conveying port of the conveying device is conveyed to the outside of the well or the coal bunker through a belt type conveyor in the crossheading, the supporting device is arranged behind the conveying device for supporting the top plate of the coal seam and linking with the conveying device, the equipment train comprises a central control chamber of a central control equipment, a starter, a power device, and a lifesaving cabin, the central control equipment monitors and controls the coordination operation of the devices, the equipment train, and the power device of the equipment train, the power device provide power source for the devices and the equipment train, and the equipment train moves freely in the crossheading with the feeding of the working faces. The invention improves system complete ability and execution efficiency, and has strong function, high intelligent degree, high safety, high production efficiency, and the like.

The invention discloses a solid-filling coal mining method with two pre-excavating tunnels for advancing. A mining roadway adopts an arrangement mode that the pre-excavating tunnels are taken as air return and inlet roadways and a gob-side entry retaining roadway is taken as a roadway for transporting filling materials and coal; coal extraction and gob backfilling are carried out by a comprehensive mechanical solid-filling coal mining process; and according to the coal mining method, a mining sequence is propelled by making a filling coal mining work surface be back to the direction for transporting the coal to a mountain in a mining area. The pre-excavating tunnels are formed before the extraction of the work surface by tunneling, and the gob-side entry retaining roadway is formed by optimally designed filling bodies beside the roadway along with the implementation of advancing filling coal mining operation along the work surface. The coal mining method is simple in process and technically and completely realizes coal milling without pillars, and the resource extraction rate of the coal is high. The coal mining method can not only solve the technical problems that a draw-back-type down-mining and up-filling work surface cannot ensure a filling effect during a filling milling process of a mine with shortage of resources, but also materialize the comprehensive mechanical solid-filling coal mining of mines with limited geological conditions by virtue of an advancing up-milling and down-filling work surface.

The invention discloses a drum-coal-mining-machine-based thin coal seam unmanned automated mining technology. The technology has the characteristics that: persons do not exist on an operating surface; operators know about conditions of the operating surface through video in a control center far from the operating surface and simultaneously complete various kinds of operation; video signals and control instructions are transmitted through a wireless switch; a coal mining machine has a function of memory cutting and is provided with a position monitoring device and an infrared transmitter at the same time, coal is automatically cut according to a preprogram, and operation parameters such as positions, directions and the like are sent out at any time; a bracket controller receives the parameters, automatically drives an electric hydraulic control valve to do actions of column lowering, frame moving, pushing, column erecting and the like according to the preprogram, and a hydraulic bracket is pushed to move forward along with the coal mining machine, so that the unmanned automated mining on the operating surface is realized; and when the thickness of coal seams, and top and bottom boards are changed, the operators regulate operation programs and the parameters in the control center and perform manual intervention on the coal mining machine and the hydraulic bracket, so that the remote-control unmanned automated mining on the operating surface is realized.

According to the invention, monitoring the load on hydraulic powered shield supports in underground use is performed by using the controller (13) serving for extraction control, which is equipped with microelectronics for load monitoring and load control, the components of the powered shield support being assigned sensors (14 to 18) whose electric measured values are used by the controller (13) for evaluating the measured signals and for driving the hydraulic rams (6, 7) and/or the angle cylinder (11) assigned to the powered shield support. The load control is preferably designed here in such a way that the critical load situations "one-sided loading" and/or "tip-toeing" are detected as early as during the setting operation, with the aid of appropriate sensors, and are rendered non-damaging in their effect by appropriately driving the hydraulic rams and/or the angle cylinder.

A band filling stoping mining method effectively solves the problems in the prior stoping mining of a 'three-low' coal bed, such as the sedimentation and distortion of the earth surface, the low recycling rate of coal and charcoal resources, the existence of safety hazards, etc. The method comprises the following steps: a transporter and a coal mining machine are laid on the working face of the mining area; in the direction perpendicular to the direction of the transporter movement, a timbering device which is composed of a hydraulic bracket of the working face, a side molding board bracket for filling beside the lane and a back molding board bracket for filling beside the lane, and connected with the connecting head of the transporter is arranged; after the brackets are pushed along the working face, paste concrete is injected through a pipeline into a filling mold cavity enclosed by the brackets, so as to form a band-shaped filling wall which is supported between the top plate above the goaf and the bottom plate of the coal bed. By the method, safe and convenient mining operation is ensured; the recycling rate for coal and charcoal is increased; meanwhile, the sedimentation and distortion of the overlying strata of the coal bed and the earth surface can be controlled in a very small range of deformation permitted by a building, thereby minimizing the amount of gentle sedimentation of the earth surface, and protecting buildings and attachments on the earth surface.

The invention discloses an unmanned roadway driving and anchoring all-in-one machine. The unmanned roadway driving and anchoring all-in-one machine comprises a driving system, a conveying system, a temporary support system, an anchoring system, a driving all-in-one machine water system, a sensing system and an electrical control system. A feed moving roller at the connection portion between a shovel of the driving system and the front end of the conveying system can prevent feed clogging at the shovel and the front end of a scraper conveyor. The temporary support system is uniform in supporting, can move relative to the driving and anchoring all-in-one machine to achieve no-deferring synchronization of driving, supporting and anchoring and can be adapted to the round, uprightly oval, approximately oval or rectangular cross section of a roadway to be applicable to driving and supporting operations of roadways of a variety of ground pressure and directions. The sensing system and the electrical control system of the driving and anchoring all-in-one machine can effectively collect and process information such as, light, distance, humidity and gas and the electrical control system performs automatic or remote manual analysis so as to achieve unattended operations in the working process and greatly improve the safety factor of the operations.

The invention relates to coal mine synthesizing exploiting caving top coal technique. Electro-hydraulic control caving top coal method is adopted hydraulic support to finish support caving top coal each procedure. The hydraulic support is made up of low order caving top coal hydraulic support and electro-hydraulic control system. In the electro-hydraulic control system, top beam incline sensor is added. The flash board jack is adopted travel sensor. The length of the flash board is increased, and the size of the coal discharging is adjusted in order to keep top beam horizontal and increase supporting stability. The coal discharging method includes the following steps: top coal sufficient crashing: adopting single sequence sublevel discharging; top coal middling crashing: adopting the same; top coal difficult crashing: adopting double sequence sublevel discharging. The invention can increase coal discharging control type, improve caving top coal technique adaptability, and realize high yield and high efficiency.

The invention relates to an electro-hydraulic control system for a working surface hydraulic support. The electro-hydraulic control system comprises a support controller (14), and a control terminal, an information acquisition device and an electromagnetic driver (21) which are connected with the support controller (14), wherein the control terminal is used for inputting an order and displaying received data information, the information acquisition device is used for acquiring the operating parameter data of the hydraulic support, and the electromagnetic driver (21) is used for driving an electro-hydraulic control valve group (22). The electro-hydraulic control valve group (22) connected with the electromagnetic driver (21) is used for controlling the closing and opening of a tube liquid pathway of the hydraulic support. The support controller (14) is used for transmitting the order from the control terminal and supplying the operating parameter data of the hydraulic support acquired by the information acquisition device to the control terminal. The electro-hydraulic control system is applied to the working surface hydraulic support.

The invention relates to a super large mining height hydraulic support which comprises an opened rigid integrated base, wherein, two double-telescopic hydraulic upright posts are arranged on the base, and the upper ends of the upright posts are connected with a top beam; the rear of the top beam is connected with a screening beam; an edge protection device is connected with the telescopic beams which are in inner extension connection with the top beam; a balance jack is arranged between the top beam and the screening beam; the screening beam and the base are respectively connected with the front and rear connecting rods; a push jack is arranged on the base and is connected with a push rod; the front part of the top beam is provided with the telescopic beams, the middle part of the top beam is provided with a falling prevention device for the support, and bottom lifting, skid prevention and support regulation devices are arranged on the base; and a levelling device is arranged on a cross binding head on the front end of the push rod; the support adopts 2-meter width between centers, the maximum height ranges from 6.3 meters to 7.5 meters, and the front end of the telescopic beam is provided with a third-stage edge protection device which is not lower than half of the mining height. The support has obvious effects of controlling the wall caving of the coal wall of a super thick coalseam, the roof fall of the ceiling, and the stability of the hydraulic support.

The invention discloses an inclined separated layer solid filling coal mining method for a super thick coal seam, which is suitable for the exploitation of an 'under three' super thick coal seam. The method comprises the following steps: determining the number of inclined separated layers according to the principle that thickness of each separated layer is 2.5-4.5 m; adopting a exploitation sequence that mining layer by layer, and filling at a next row; arranging tunnels and equipment according to the conventional solid filling coal mining method; carrying out a circulating sequence that coal mining firstly, metal nets and bamboo fences paving secondly, and filling finally to complete the filling exploitation of a first mining surface and a first separated layer; meanwhile, mining according to the same filling coal mining method under the shield of a manual false roof formed by the first separated layer at the corresponding position of a second separated layer 4 months after a working face of the first separated layer finishes mining; circulating in the way that the exploitation of one separated layer is performed under the shield of a manual false roof manufactured by an upper separated layer continuously until the whole super thick coal seam is mined out. Through the adoption of the method, resources of the 'under three' super thick coal seam can be utilized, the rock formation movement and earth surface sinking can be effectively controlled; and the recovery ratio is high, the production efficiency is high, the cost is low, and the method has wide practicability in the field of thick coal seam filling exploitation.

The invention relates to an in-time supporting device for a fully-mechanized coal mining machine, comprising a pedestal, a top beam, a hydraulic upright post which connects the pedestal and the top beam, side frames which consist of four link mechanisms, and a telescopic connecting beam and a hydraulic cylinder which are hinged between two side frames. The invention adopts the technical key points that: top beams of the side frames adopt front top beams or continuous top beams; the side frames which are arranged in parallel and provided with the front top beams or the continuous top beams are hinged into a front support or a continuous support through an arched beam or a horizontal beam; shun beams are arranged on the arched beam or the horizontal beam at intervals; belt guard beams or telescopic shun beams are arranged between adjacent shun beams. The in-time supporting device for the fully-mechanized coal mining machine effectively solves the problems in the prior art of lagged supporting means, difficult frame movement, requirement of stop operation, low efficiency and so on, is reasonable in structural design, stable in supporting operation, convenient in assembly and disassembly and maintenance, and safe and reliable in use, preferably meets the requirements of matched operation of underworkings and the fully-mechanized coal mining machine, realizes in-time mechanical support of a just exposed roof of a tunneling work surface of a laneway, and shields the fully-mechanized coal mining machine to realize continuous operation.

The invention discloses process method and equipment for heading and anchoring parallel operation construction. According to the process, a heading face is divided into a heading machine operation area and an anchoring support area, wherein the heading machine operation area ranges from a heading head to a heading machine tail, a heading machine post-anchoring operation range serves as the anchoring support area, the heading machine operation area and the anchoring support area are collectively called as a temporary support area, temporary support is carried out in the temporary support area by adopting folding telescopic laneway hydraulic support frames, and heading machine cutting and permanent support are parallelly operated; when the heading machine cutting and anchoring support are completed for one step pitch, the hydraulic support frames positioned on the tail ends of the temporary support area are withdrawn and carried to the heading head through an auxiliary support frame lifting and carrying device, and the hydraulic support frames are lifted to complete the temporary support so as to be subjected to heading and anchoring parallel operation in a next cycle. The heading and anchoring parallel operation construction comprises a heading machine, a plurality of laneway hydraulic support frames, the auxiliary support frame lifting and carrying device, an anchoring support operation platform, a machine back transportation system and a machine tracking ventilating dustproof facility.

A tunnel boring machine is provided comprising a cutter head, a main beam, a first, second, and third shield; and a ground conditioning work zone within the first shield, a gripper assembly, a segment erector arm for lining the tunnel, and at least one propulsion mechanism. The ground conditioning work zone includes at least one probing device for probing the terrain ahead of the cutter head. The first shield is configured to be retracted relative to the second shield to provide access for the ground conditioning work zone to apply at least one ground support device. The at least one propulsion mechanism moves the cutter head, the first and the second shield forward while the third shield and the gripper assembly remain stationary. The ground support devices can include filling a hole with a ground conditioning agent; and placing a bolt, ring beam, mesh, or shotcrete in/on the tunnel wall.

The invention relates to a support-type comprehensive tunneler which comprises a non-tracked tunneler, a tunneler chassis, a left hydraulic support, a right hydraulic support, a drilling rig and scraper conveyors, wherein the tunneler is arranged on the tunneler chassis, and two advancing jacks are arranged on the tunneler chassis; the other ends of the two advancing jacks are respectively connected with the left hydraulic support and the right hydraulic support, and the two sides of the tunneler chassis are respectively provided with a lateral pushing oil cylinder; forestopes of the left andright hydraulic supports are respectively provided with a group of metal mesh storages, and the tail of a main top beam of the support is hung with the drilling rig; the tail of a first scraper conveyor is arranged on a spade plate of the tunneler, and the head of the first scraper conveyor and the tail of a second scraper conveyor are overlapped; and the head of the second scraper conveyor and the tail of a belt loader are overlapped, and sleds are arranged at the back of the two hydraulic supports. The tunneler has the advantage that the drilling support and the coal cutting of the tunnelerare simultaneously carried out, and also has the automatic lapping function, thus reducing labor intensity and increasing the coal mining efficiency by over 4 times.

The invention provides a scrapping plate conveyor dynamic straightening method based on the absolute motion trajectory of a coal cutter and belongs to a scrapping plate conveyor dynamic straightening method for a full-mechanized mining face. In the dynamic straightening method, a positioning device mounted on the coal cutter is utilized, so as to conduct real-time monitoring to the moving trajectory of the coal cutter along the scrapping plate conveyor; a signal processing circuit analyzes the dynamic position data of the coal cutter moving along the scrapping plate conveyor under the set spatial coordinate system; the absolute motion trajectory curve of the coal cutter and target reference motion trajectory of the quire under the geographical spatial coordinate system are concluded; a micro controller draws a target reference motion trajectory of a next quire according to the target reference trajectory and the working face coal bed terrain; the displacement distance of each hydraulic support is calculated; the micro controller controls an electro hydraulic control system via an output circuit; the electro hydraulic control system controls each bracket controller, so as to push a jack forward and enables the scrapping plate conveyor to meet the linear requirement. The positioning device on the coal cutter detects the orientation of the full-mechanized mining face in the geographical spatial coordinate system, so that adjusting false inclination of the full-mechanized mining face can be achieved.

The invention discloses a comprehensive dredging machine. The comprehensive dredging machine comprises a crawler-free type dredging machine, a hydraulic support, a drilling machine, a scraper conveyor, a runner and the like. The upper end of the hydraulic support is provided with a main top beam, a front canopy, a back canopy and a cross beam; the dredging machine is arranged on a foundation; thefront and rear ends of the foundation are provided with a slope regulation jack respectively; one end of a front pushing and pulling jack is connected with the foundation of the dredging machine, andthe other end of the front pushing and pulling jack is connected with the hydraulic support; the rear of the dredging machine is provided with a self-advancing jack, and two sides of the foundation are provided with a side push cylinder respectively; and the drilling machine is arranged below the main top beam or the back canopy; and the runner is arranged behind the hydraulic support and is connected with a rear push and pull jack arranged on the hydraulic support by an anchor chain and a pulley. The comprehensive dredging machine has the advantages of parallel operation of hole drilling andsupporting, and coal cutting of a development machine, a roadway turns flexibly, the turning radius is small, the turning speed is high, the tunneling speed is high, and the safety is guaranteed.

The invention discloses a mining method employing a solid filling and fully-mechanized coal mining hybrid working face, namely a method for carrying out coordinated and combined mining by combining solid filling with fully-mechanized coal mining on the same coal face. Coal mining is carried out by adopting a strike retreating-longwall mode; coal cutting, coal charging and coal handling procedures are the same as those of a fully-mechanized coal mining process; a solid filling section of the hybrid working face is used for supporting a roof by virtue of a filling and mining hydraulic support; solid filling materials are backfilled to a goaf management roof by virtue of a porous hopper conveyor which is suspended behind and below of the filling and mining hydraulic support; a fully-mechanized coal mining section is used for supporting the roof by virtue of a fully-mechanized coal mining hydraulic support; the goaf is managed by adopting a caving method. The mining method is beneficial for giving play to dual advantages of solid filling and fully-mechanized coal mining; the problem of environmental pollution caused by accumulation of solid wastes such as gangue, coal ashes and construction wastes on the ground is reduced by solid filling; the working face is lengthened by combining with fully-mechanized coal mining; tunneling of a mining roadway is reduced; the single yield and single effect of the working face are improved; the requirements of a modern mine on production capacity are met.

A method and apparatus is provided for determining structural change in a mining operation. A first scan of gateroad surfaces is obtained and information of the scan profile is stored. At a later time a second scan of the gateroad surfaces is then obtained. Information of the scans can be registered and any difference noted. If the difference exceeds a threshold a warning can be provided indicating a gateroad structural change that may be hazardous. The scans can be made from a single sensor, or from multiple sensors (301, 303). In the case where the sensors (301, 303) are mounted on a gateroad traversing structure (109), the distance of spacing of the sensors (301, 303) can be used to determine when the sensor (303) has reached a position of movement or travel of the gateroad traversing structure (109) where the scan from sensor (301) was made. A distance sensor (309) can be provided to determine the distance of movement and where the scans coincide.

The invention relates to a temporary supporting device for roadway drifting. The key technical points of the temporary supporting device for roadway drifting are as follows: a middle support plate is fixedly connected with the upper part of a top beam frame; two side support plates are respectively arranged at two sides of the middle support plate; the support plates are mutually hinged; the sidesupport plates are hinged with the top beam frame through a link mechanism below the side support plates; the top beam frame is also hinged with two bracing cylinders; the other ends of the two bracing cylinders are hinged with a longitudinal connecting beam of the link mechanism of the two side support plates; and a longitudinal connecting beam of a link mechanism below another two side support plates is hinged with a floating cylinder. The lower end of the top beam frame is hinged with the top part of a rack; and the rack is a component of a foldstool with a shape that two supporting feet are crossed. The rack comprises a left L-shaped girder, a right L-shaped girder, a stay bar, a lift cylinder, and an adjusting cylinder. A caterpillar mechanism is connected with the bottom of the rackin a dismountable way; and a road clearing shovel is arranged at the lower part of the front end of the rack. The temporary supporting device for roadway drifting has simple and flexible structure, is safe and reliable, and can adapt to changes of sizes and shapes of roadway roofs in a certain scope.