819results about "Props/chocks" patented technology

The invention discloses a pressure relief and shock absorption method for a deep high-stress key pillar. (a) a top plate is arranged at the top of the ore pillar, four inclined kerfs are alternately arranged in a top plate area around the ore pillar, and the kerfs are symmetrically arranged in a cross shape; (b) eight anchor rod drill holes perpendicular to the top plate are formed in the interval area between the adjacent kerfs and the periphery of the ore pillar, perpendicular anchor rods are arranged in the anchor rod drill holes, and an orthogonal supporting network formed by the perpendicular anchor rods is formed; and (c) preferentially releasing the bending energy of the roof through the kerf, reducing the vertical load of the ore pillar, and meanwhile, forming a pressure arch effect by applying the prestress of the vertical anchor rod, thereby realizing space-time coupling support of the kerf and the anchor rod, and inhibiting roof separation and dynamic disturbance. The invention has the characteristics of excellent stress transfer, strong vibration suppression and excellent overall column stability.

The invention discloses a coal mine fully mechanized coal mining face multi-mode prediction type intelligent straightening system and method.The system comprises a multi-mode sensing network, a data fusion prediction module and a control optimization module, and thermal imaging double cameras, pressure / dip angle / stroke / distance measuring sensors and laser scanners are arranged on hydraulic supports and inspection equipment; the comprehensive sensing of the working environment of the fully mechanized coal mining face is realized; fusing visible light, infrared, point cloud and state parameter data, and performing support attitude estimation and trend prediction by adopting Kalman filtering and an LSTM neural network; according to the intelligent support control system and the control method thereof, self-adaptive dynamic straightening control is executed based on a prediction result, remote monitoring and a closed-loop optimization mechanism are combined, the support control precision and the operation safety are improved, the automation level and the response capability of fully-mechanized coal mining operation are improved, and the intelligent support control system is suitable for complex mine pressure conditions.

A jacking system is used for excavation construction of cross passage. The jacking system includes a reaction frame and force transmission member which connects the reaction frame with main tunnel segment(s) surrounding a starting end of the cross passage. The reaction frame is used to provide support for excavation apparatus along an excavation direction. Support force is transmitted to the main tunnel segment(s) surrounding the starting end of the cross passage via the force transmission member. Back support is cancelled from the jacking system and the structure and whole system are more simplified and intensive. In addition, the space behind the reaction frame is no longer occupied, which makes it possible to construct main tunnel and cross passages or multiple cross passages simultaneously. This jacking system not only has low manufacturing cost, but also reduces construction cost due to simplified operation, construction space saving and simultaneous construction procedures.

The invention discloses a coal mine deep high-stress roof stabilizing device based on a truss collaborative structure. The coal mine deep high-stress roof stabilizing device comprises a supporting module, a lifting supporting mechanism, a buffering mechanism and a flow guide filtering mechanism. The supporting modules are detachably and fixedly connected through a splicing structure, the lifting supporting mechanism is installed at the tops of the supporting modules and used for driving the supporting components to abut against a coal mine roof, the buffering mechanism is connected with the supporting components, and the flow guide filtering mechanism is arranged on the side portions of the supporting modules and used for receiving and treating roof seepage water. The invention discloses a roof stabilizing device suitable for a deep high-stress environment of a coal mine, the roof stabilizing device is composed of a supporting module, a lifting supporting mechanism, a buffering mechanism and a flow guide filtering mechanism, and through the design of convenient splicing locking, flexible buffering supporting and efficient flow guide filtering, the stability, operation efficiency and safety of roof supporting are improved.

A non-uniform-strength supporting control method in a cutting process, comprising a data acquisition system and a postprocessing system. The postprocessing system comprises a data processing system, a result determination system, a comprehensive analysis system, and an output and storage system; and the supporting force of each hydraulic support can be adjusted in real time, to adapt to supporting force changes caused by advancement of the hydraulic supports. By comprehensively considering the mechanical properties of coal rock and the supporting requirements in the advancement process, the method uses an advanced control algorithm and a real-time data feedback mechanism to effectively solve the technical problem that in the advancement process, insufficient supporting force of the hydraulic supports leads to an instable mine pressure.

The coal mine supporting structure with the early warning function comprises a supporting main body unit, a monitoring early warning unit and an emergency supporting unit, the supporting main body unit comprises a top beam, a supporting column and a base, the supporting column is vertically connected between the top beam and the base, and the monitoring early warning unit is arranged on the supporting main body unit. The monitoring and early warning unit comprises a pressure sensor, a displacement sensor, a data processing module and an alarm device; compared with the prior art, the emergency supporting system has the advantages that by arranging the pressure sensor and the laser displacement sensor, the pressure change and deformation quantity of key nodes of a supporting structure can be accurately captured, and when monitoring data is abnormal, the emergency supporting system is started, and the emergency supporting system is started. The data processing module synchronously starts hydraulic props and inflatable bags of the emergency supporting unit, the hydraulic props are symmetrically arranged on the two sides of a supporting column, the inflatable bags are embedded in the top of a top beam, the stability of a supporting structure can be rapidly enhanced, and the defect that monitoring and emergency response of a traditional supporting device are disjointed is overcome.

The invention discloses a self-adaptive supporting pillar based on multi-modal perception, a height adjusting method and device thereof, a storage medium and electronic equipment, and belongs to the technical field of intelligent equipment. The supporting column is used for a space needing to be supported, and the space needing to be supported is provided with a contact face capable of making contact with a self-adaptive pressure-bearing top disc. The self-adaptive pressure-bearing top tray is fixedly arranged at the top of the supporting pillar; the displacement sensor and the pressure sensor are arranged in the self-adaptive pressure-bearing top tray, the displacement sensor is used for acquiring the contact distance between the self-adaptive pressure-bearing top tray and the contact surface, and the pressure sensor is used for acquiring the contact pressure between the self-adaptive pressure-bearing top tray and the contact surface; and the processor is used for adjusting the height of the supporting pillar according to the contact distance and the contact pressure, so that the stress of the contact surface is within a set range. The method, the device, the storage medium and the electronic equipment can be used for adjusting the height of the supporting pillar. The supporting performance of the supporting pillar can be remarkably improved, and potential safety hazards are reduced.

The utility model discloses a coal mine tunnel supporting structure which comprises two supporting loop bars. The lifting rod is connected to the interior of the supporting sleeve rod in a sliding manner; the top plate is arranged at the upper end of the lifting rod; the positioner is arranged on the outer side of the upper end of the supporting sleeve rod; the protective net and the two fixers are arranged on the two sides of the outer end of the top plate respectively. According to the coal mine tunnel supporting structure, the top of the coal mine tunnel is supported through the top plate, the width of the top plate can be adjusted so that the top plate can be matched with the width in the coal mine tunnel, the top plate is supported through the supporting sleeve rod and the lifting rod, and the supporting sleeve rod can slidably ascend and descend in the lifting rod; after the supporting sleeve rod is lifted to a proper position, the position of the supporting sleeve rod can be fixed through the positioner; the protective nets are arranged on the two sides of the outer end of the top plate correspondingly, falling rocks on the top of the coal mine roadway are blocked through the protective nets, and the situation that people in the roadway are injured by the falling rocks is avoided.

The utility model discloses a convenient temporary support device for coal mining, which comprises a support body, thread bushings are coaxially arranged at the upper end and the lower end of the support body, screw rods are in threaded fit with the thread bushings, the thread turning directions of the upper screw rod and the lower screw rod are opposite, and when the support body rotates towards one side, the support body rotates towards the other side. The upper screw rod and the lower screw rod move in opposite directions; a supporting plate is arranged at the outer end of the screw rod; the height of the device can be contracted, the device can be conveniently carried and moved in a narrow coal seam channel, and after the device reaches an excavation position, the height of the device can be lengthened, so that the upper supporting plate and the lower supporting plate are supported on the top face and the bottom face of the coal seam channel respectively, the supporting effect on ore above the coal seam channel is achieved, small collapse can be coped, and the device is convenient to use. And an effect of protecting mining workers is achieved.

The invention provides a mine supporting method, device and equipment. The method comprises the steps that first supporting data of a to-be-supported mine is obtained; determining a target support strategy of the to-be-supported mine based on the first support data and a preset support database; when the to-be-supported mine executes the target supporting strategy, supporting monitoring parameters of the to-be-supported mine are collected at target time; under the condition that the value of the support monitoring parameter is larger than a preset safety threshold value, the target support strategy is adjusted, and the adjusted target support strategy is obtained; the adjusted target supporting strategy is used for updating the target supporting strategy. The tamper-proof support database is constructed through the block chain technology, the support strategy is dynamically optimized in combination with real-time monitoring data, the problems that a traditional support mode is low in data credibility and lagged in decision are solved, and the method has the advantages that the support data credibility is improved, and the support strategy is dynamically optimized.

The modular, removable primary support steel frame comprising a column (1) and a boom (2), wherein the boom (2) is attached to the side wall of the column (1), characterized in that a fastening mechanism (3) is connected between the column (1) and the boom (2), the fastening mechanism (3) comprising: a vertical plate (301), the vertical plate (301) being fixed to the side wall of the column (1); a positioning rod (302), the positioning rod (302) being fixedly attached to the side wall of the vertical plate (301); the positioning holes (303), wherein the positioning holes (303) are opened symmetrically in the side wall of the column (1), wherein the positioning rod (302) is inserted into the inner cavity of the positioning holes (303); the positioning plate (304), wherein the positioning plate (304) is fixedly attached to the side wall of the vertical plate (301), wherein the positioning plate (304) is recessed on the surface of the column (1).

The present application belongs to the field of coal mine roadway construction, and particularly relates to a method for self-forming a roadway by top cutting at a negative angle. The method comprises the following steps: drilling a field in front of a working face and close to a right side of a mining roadway; drilling anchor holes and top cutting holes along a strike and staggered construction, and installing grouting anchor cables in the field; cutting the basic roof and the immediate roof at a negative angle through the top cutting holes at the back of the working face, constructing a roadway-side gangue retaining structure, grouting through the grouting anchor cables and anchoring the grouting anchor cables on the roadway-side gangue retaining structure; and monitoring the deformation of the steel mesh at the grouting anchor cable and adjusting through a nut. The present application can ensure that the construction position of the roadway-side gangue retaining structure does not affect the width of the self-supporting roadway and the integrity of the roof by constructing a field of a certain width in advance. The negative angle top cutting holes can cut a section that is deviated to the direction of the goaf, so that the gangue formed by the collapse of the immediate roof moves to the direction of the goaf and does not move to the mining roadway in large quantities, thereby ensuring the safety of the construction in the mining roadway.

The invention discloses a supporting structure suitable for tunnel curved surface monitoring and dynamic adjustment, and relates to the technical field of tunnel supporting structures.The supporting structure comprises supporting steel frames and right-angle connecting frames, the right-angle connecting frames are arranged in a left-right symmetry mode, and the supporting steel frames are erected on the right-angle connecting frames through adjusting assemblies; multiple sets of supporting units are arranged between the supporting steel frames, multiple sets of anti-settling parts are arranged at the bottom of the positioning frame, each anti-settling part comprises a lower settling column, the lower end of the lower settling column is embedded into soil, a liquid cavity and a storage cavity are formed in the lower settling column, and a liquid guiding assembly is arranged between the storage cavity and the liquid cavity; liquid in the storage cavity can enter the liquid cavity with the reduced pressure intensity under the action of the liquid guide assembly, and a plurality of sets of locking blocks are arranged in the liquid cavity. According to the device, the anti-sedimentation part serves as a bottom support, the influence of sedimentation on the positions of the supporting steel frame and the monitoring equipment is reduced, and the stability of tunnel supporting and the accuracy of monitoring information are ensured.

The invention relates to a single spiral stand column and a using method thereof.The single spiral stand column comprises a lower stand column pipe and an upper stand column pipe connected into the lower stand column pipe in a sleeved mode, a mounting shell is fixedly connected to the lower stand column pipe, a lead screw is connected into the mounting shell through a shaft and is in threaded connection with the upper stand column pipe, and a driving mechanism for driving the lead screw to rotate is installed in the mounting shell; the movable column body is fixedly connected with the upper end of the upper stand column pipe through a hoop assembly, the mode that lead screw driving and the adjustable movable column body are combined is adopted, supporting operation can be independently completed without depending on an external hydraulic pump station, the application range of the movable column body is expanded, the overall structure is compact, the weight is light, and the movable column body is convenient to use. The mounting and adjusting process is simple and fast, the supporting efficiency is remarkably improved, and the operation time is shortened; repeated pressure test and maintenance work needed by a hydraulic system is avoided, meanwhile, the problem of environmental pollution caused by oil leakage is avoided, and the requirements for energy conservation and environmental protection are met.

The utility model discloses a hydraulic support for mining, which comprises two groups of support components, namely a support component I and a support component II, the support component I and the support component II are symmetrically placed in a mine roadway, a fixing plate is connected between the support component I and the support component II, and the support component I and the support component II are fixed on the fixing plate. The first supporting assembly and the second supporting assembly are the same in structure. The utility model belongs to the technical field of mining equipment, the threaded rod sequentially and movably penetrates through the bottom wall of the supporting piece, the base plate and the bottom plate and then is inserted into the ground, the equipment is fixed, and meanwhile the supporting piece, the base plate and the bottom plate can be fastened through the nuts; an external inflator pump inflates the storage cavity through the air inlet hole, air in the storage cavity enters the groove hole through the vent hole, the elastic piece in the groove hole is bulged and arranged to be attached to the uneven position in a mine roadway, and meanwhile the bulged elastic piece can buffer rigid impact force encountered by a mine.

The invention relates to the technical field of roadway supporting, and provides a soft rock dynamic pressure roadway supporting method adopting a combined supporting device, which comprises the following steps: S1, prefabricating a connecting piece 5 and a supporting unit; s2, performing double-gradient grouting on the surrounding rock of the roadway; s3, a roadway surrounding rock anchoring system is constructed; s4, mounting a bearing plate on the surrounding rock of the roadway; s5, the connecting pieces and the multiple supporting units are spliced according to the section shape of the roadway to form a rectangular roadway combined supporting device or a three-star-arch roadway combined supporting device; s6, a displacement sensor, a pressure sensor group and a controller are installed; step S7, floor heave construction; and S8, dynamic support regulation and control. According to the combined supporting device, active supporting, real-time monitoring, dynamic compensation and bottom plate reinforcing are integrated, and the problem of multi-dimensional deformation of the extremely soft rock dynamic pressure roadway is solved through structural innovation and construction process optimization.

To provide a mountain tunnel construction method using a tunnel workstation that enables a mountain tunnel to be efficiently constructed by minibench cut method in a highly mechanized manner.SOLUTION: A tunnel workstation 10 includes an upper-stage frame part 11 on which a man cage 17 is provided, a pair of right and left middle-stage frame parts 12 on which an erector 18 is provided, and a pair of right and left lower-stage frame parts 13 on which a drilling machine 16 is provided. A liftable slide deck 15, which is a working scaffold for an operator and can be expanded in a width direction Y of a tunnel, is fitted on a lower surface side of the upper-stage frame part 11. A protection net installing step to install a protection net 30 stretched between holding attachment parts 18c of the right and left erectors 18 above a cage body 17c of the man cage 17 and a deck body 15a of the liftable slide deck 15 is included.SELECTED DRAWING: Figure 1

The invention discloses an intelligent tunnel construction monitoring and self-adaptive supporting system based on multi-mode perception and a self-adaptive method.The system comprises a plurality of distributed optical fibers located in a tunnel, and the distributed optical fibers are connected with a data acquisition system through anti-bending optical fiber jumpers; a plurality of adjustable anchor rod assemblies are arranged at preset positions on the wall of a tunnel, anchor rods of the adjustable anchor rod assemblies are connected with an assembled pressure-bearing central pivot cylinder, the inner wall of the assembled pressure-bearing central pivot cylinder is connected with a pressure-bearing core column through a micro jack, the assembled pressure-bearing central pivot cylinder is sleeved with the pressure-bearing core column, and the pressure-bearing core column is connected with the pressure-bearing core column. And the data acquisition system is positioned on the assembled pressure-bearing central cylinder. According to the intelligent tunnel construction monitoring and self-adaptive supporting system based on multi-modal sensing and the self-adaptive method, efficient and accurate supporting of tunnel surrounding rock is achieved, the safety of tunnel construction and operation is improved, and meanwhile the supporting cost is reduced.

The utility model relates to the technical field of coal mine filling, and discloses a supporting device for coal mine filling roof contact, which comprises a roof contact table, the middle of the roof contact table is fixedly connected with a fixed column, the inner wall of the fixed column is fixedly connected with a motor, and the output end of the motor is fixedly connected with a driving bevel gear. The outer wall of the driving bevel gear is in meshed connection with a driven bevel gear, the middle of the driven bevel gear is fixedly connected with a rotating column, the right end of the rotating column is fixedly connected with a rotating disc, the right end of the rotating disc is fixedly connected with an eccentric shaft, the outer wall of the eccentric shaft is rotationally connected with a connecting rod, and the other end of the connecting rod is rotationally connected with a U-shaped block. According to the utility model, the motor drives the eccentric shaft to rotate and the telescopic column to do linear reciprocating motion, so that the vibrating plate vibrates, filling materials can flow more smoothly, the void ratio is reduced, the compactness of a filling body is improved, the filling speed is increased, and the working efficiency is improved.

The automatic maintenance equipment for the mining hydraulic support stand column comprises a driving module and a dismounting module, the dismounting module is connected to the top of the hydraulic support stand column in a sleeving mode and corresponds to an inner guide sleeve, and the driving module is located below the dismounting module and connected to the lower middle portion of the hydraulic support stand column in a sleeving mode; the dismounting module comprises a fluted disc, an outer guide sleeve, an inner clamping block, an adjusting rod, a ratchet wheel, a driving motor and a gear; the driving module comprises a hoop, a supporting plate, a vertical rod, a hydraulic oil cylinder and a pawl; when the driving motor drives the gear and the fluted disc to rotate, the arc-shaped guide groove in the fluted disc guides to enable the adjusting rod to drive the clamping blocks to move in the radial direction so as to clamp the inner guide sleeve. The hoop is fastened on a hydraulic support stand column, the hydraulic oil cylinder on the supporting plate drives the pawl to be matched with the ratchet wheel through the stand rod and drives the ratchet wheel to rotate so that the outer guide sleeve can rotate, and therefore the inner guide sleeve clamped in the outer guide sleeve can be disassembled. The inner guide sleeves on the hydraulic support stand columns of different sizes can be automatically disassembled, adaptability is high, and operation efficiency is high.

The invention relates to a fully-mechanized caving support multiple-butt-joint process and a mining face arrangement method, and belongs to the technical field of coal mine fully-mechanized caving mining face arrangement and support installation. According to the technical scheme, mining face arrangement is optimized according to the revealed coal seam occurrence condition in the tunneling process, and the coal mining amount is delineated to the maximum degree; multiple cutting holes are arranged, and the equipment installation route is optimized; and the positions and states of the recovery bracket and the equipment are accurately controlled, and safe and rapid butt joint of the multi-open-off cut bracket and the equipment is realized. The method has the beneficial effects that the delineated coal mining amount is maximized, the number of equipment transportation links is small, and repeated butt joint is safe, rapid and accurate.

The utility model discloses a kind of coal mining roadway supporting structure, including protective net, the protective net one end and the other end are placed with plate body one, two groups the plate body one between being equipped with plate body two, the plate body two one end and the other end are respectively with corresponding plate body one adhere, plate body two is placed with multiple groups of frame body, multiple groups The frame body one end is all set with groove body.The utility model, by sliding frame body on plate body two, the position of multiple groups of frame body can be adjusted, after adjusting is completed, make rubber block and plate body two resist tight by screw bolt one, frame body is fixed, frame body moves and drives plate body four to move, by adjusting the position of plate body four can different area of protective net is applied support force, so that protective net can adhere to the roadway surrounding rock of non-standard section to a certain extent, to a certain extent, avoid the gap problem caused by shape fixed of traditional integrated supporting plate, ensure that supporting force is evenly distributed, to a certain extent, inhibit surrounding rock deformation.

The utility model discloses a kind of mining single prop column shoes, it is related to column shoe technical field, the utility model includes column shoe main part, inner support cylinder is connected in column shoe main part inside, inner support cylinder is sleeved with inner hoop ring outside, column shoe main part is sleeved with outer support cylinder outside, and outer support cylinder is sleeved with outer hoop ring outside, pull rod is connected between outer support cylinder and inner support cylinder. The utility model is provided with inner support cylinder, pull rod and outer support cylinder, inner support cylinder provides support from column shoe main part inside, outer support cylinder is constrained from outside, pull rod connects both and bears tension and strengthens column shoe main part, forms the anti-deformation structure of pull rod and outer support cylinder inside and outside cooperation, significantly improve the structural stability and carrying capacity of column shoe, reduce the security risk caused by radial creep;At the same time, when column shoe main part occurs axial creep, outer support cylinder is good in structural stability and can be used as reference object for metal material;Radial creep of column shoe main part can be effectively inhibited, and axial creep condition is convenient for determining.

The invention provides an efficient mechanical integrated roof support brushing and expanding process, and relates to the technical field of coal mine retracement, and the process comprises the following steps: S1, safety inspection of a construction area; s2, the coal mining machine brushes and expands layers on the coal wall to a preset height in a layered mode; s3, after the equipment is locked, wall tapping and top asking are executed; s4, a flexible net is laid, and temporary supporting of the top slope is implemented; s5, permanent support of the roof is implemented in stages, a multi-cutter progressive support mode is adopted, permanent support is synchronously propelled after brush expansion of each cutter, and the support stage and the brush expansion stage of the coal mining machine are alternately carried out; s6, the coal mining machine conducts bottom discharging to complete brushing and expanding circulation; the flexible net is used for replacing anchor net supporting, the supporting empty top time is short, the safety coefficient in the construction period is increased, the construction procedures of conveying the anchor net and temporary supporting are reduced, the labor intensity of workers is reduced, meanwhile, the construction efficiency is improved, the flexible net supporting is used for replacing the anchor net supporting, the flexible net supporting is integrated, the lap joint condition does not exist, the supporting strength is enhanced, and the supporting effect is good. And no supporting blind area exists.

The present application relates to mine supporting equipment technical field, in view of the existing pillar under complex working condition is difficult to give consideration to the resistance and yielding performance, stability and reliability are insufficient, the present application discloses a kind of non-liquid injection single yielding resistance pillar, the present pillar includes base, shell assembly is equipped on base;Lift sleeve assembly's lead screw is rotatably connected with base, large gear assembly is coaxially arranged on lead screw, sleeve is slidably sleeved in shell assembly;Shell assembly side is equipped with ratchet assembly, its output shaft pinion assembly is engaged with large gear assembly;Sleeve top is equipped with guide seat, there is hydraulic pillow in guide seat, which shows real-time pressure, hydraulic pillow is equipped with yielding pipe, and the top of yielding pipe has pressure plate and buffer block;Guide seat is equipped with pipe assembly, and the bottom of pipe assembly is in contact with the top surface of yielding pipe and buffer block. Through the cooperative work of various components, the resistance of the pillar is increased, and the height can be adjusted when the pressure increases. The stability and reliability are ensured, and the mine support requirements are met.

The present invention discloses an anti-collapse support device for road and bridge tunnel construction, belonging to the technical field of road and bridge tunnel construction. The anti-collapse support device for road and bridge tunnel construction includes a base, support columns are symmetrically arranged on the base, a mounting plate is connected to the support columns, a top support module is arranged on the mounting plate, a lifting assembly and a first limiting assembly are arranged between the mounting plate and the top support module. The first limiting assembly includes a lifting rod, second wedge-shaped blocks are distributed on both sides of the lifting rod, first limiting grooves are arranged on both sides of the lifting rod, a moving plate is arranged in the first limiting grooves, a first wedge-shaped block is arranged on one side of the moving plate, a first slider is connected to the other side of the moving plate, a first limiting gear is installed in the first limiting grooves, the first limiting gear is connected to one end of a first swing rod, the other end of the first swing rod is hinged to the first slider, and a first movable rack is arranged in the first limiting grooves, having the advantages of stable fitting, stable support, flexible adjustment, high-efficiency limiting and safety and reliability.

The invention provides a supporting structure for a weak surrounding rock tunnel, and belongs to the technical field of tunnel engineering. The supporting structure for the weak surrounding rock tunnel comprises a ground fixing mechanism and a top supporting mechanism. The ground fixing mechanism comprises a bottom plate, an anchor rod and a lateral protection assembly. The top supporting mechanism comprises a telescopic part, a first sleeve, a first spring, a first sliding rod and a first top plate, the first sleeve is fixed to the top of the telescopic part, and the bottom end of the first sliding rod is fixedly connected with the bottom of an inner cavity of the first sleeve through the first spring. When the device is used, the telescopic piece drives the first sleeve to move, the height of the first sleeve is adjusted, so that the first spring in the first sleeve is in a compressed state, and a certain supporting buffer space is reserved for the top supporting mechanism; and the compressed first spring can enable the first top plate to always support and protect the rock mass.

The invention discloses a roadway forepoling hydraulic support energy absorption receding device, and belongs to the technical field of coal mine fully-mechanized coal mining, and the roadway forepoling hydraulic support energy absorption receding device comprises a pressure-bearing beam and an energy absorption receding component; the pressure-bearing beam is of a box structure, and the top of the pressure-bearing beam is provided with an antiskid structure. The energy absorption receding component is fixedly connected to the lower portion of the pressure bearing beam and is of a corrugated steel plate structure. The method has the advantages that the supporting strength of a roadway and the stability of a supporting system are improved, and the safety of underground operating personnel is guaranteed.

This utility model relates to the field of spillway tunnel support technology, specifically a reinforcement support device for spillway tunnel excavation. It includes a fixed frame, with lifting blocks bolted to both ends of the fixed frame. A support block is slidably connected to the lower end of each lifting block, and a support base is fixed to the lower end of each support block. Multiple brackets are fixed to the top surface of the lifting blocks. Connecting seats are fixed to the outer ends of the brackets and both ends of the top surface of the fixed frame. Arc-shaped blocks are bolted to the connecting seats. A first pressure-relief block is fixed between two adjacent arc-shaped blocks. A second pressure-relief component is installed at the end of each bracket near the arc-shaped block. A connecting component, including an insert block, is installed on the arc-shaped block. The first pressure-relief block between adjacent arc-shaped blocks and the second pressure-relief component at the end of the bracket undergo controllable limited deformation, absorbing the energy released by the surrounding rock while maintaining stable support for the surrounding rock. This reduces the rigid stress on the structure, decreases brittle failures such as retaining wall cracking, support bending, and joint collapse, and lowers the risk of collapse.