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Pressure relief and shock absorption method for deep high-stress key pillar
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.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
Multi-mode prediction type intelligent straightening system and method for fully mechanized coal mining face of coal mine
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.
Owner:CHANGZHOU LIANLI AUTOMATION TECH
Coal mine fully-mechanized coal mining equipment withdrawing robot
The invention provides a withdrawing robot for fully-mechanized coal mining equipment, and relates to the field of coal mining equipment. The withdrawing robot for the fully-mechanized coal mining equipment comprises a chassis assembly, an advancing assembly and a swing type dragging assembly, the advancing assembly is installed on the chassis assembly and is transversely and slidably connected with the chassis assembly, the swing type dragging assembly is fixedly installed on the advancing assembly, the chassis assembly comprises a transportation flat plate, and a plurality of long rails are arranged at one end of the surface of the transportation flat plate; the advancing assembly slides in cooperation with the long rail, a plurality of crow plates are hinged to the end, away from the long rail, of the transportation flat plate, and the upper end face of each crow plate is of an arc-shaped structure. According to the withdrawing robot for the fully-mechanized coal mining equipment, by arranging the chassis assembly, the swing type dragging assembly and the advancing assembly, the fully-mechanized coal mining equipment can be withdrawn with low resistance and high efficiency, the dragging self-immobilization degree is high, and the robot is not prone to slipping underground. And the device is also suitable for withdrawing equipment in a mine tunnel with a gradient.
Owner:SHAN ORIENT DA ENG CO LTD
Single spiral strut for top coal caving and recycling
The single spiral supporting column comprises a supporting column body, a supporting cylinder and a protective cylinder, a first adjusting cylinder is movably inserted into the top of the supporting cylinder, a first sleeve is movably inserted into the top of the first adjusting cylinder, the bottom of the supporting column body is movably inserted into the first sleeve, and a stabilizing mechanism is arranged on the supporting cylinder; a first adjusting cylinder is movably inserted in the supporting cylinder, a protective cylinder is movably inserted in the first adjusting cylinder, a second adjusting cylinder is movably inserted in the protective cylinder, a second sleeve is movably inserted in the second adjusting cylinder, a supporting column top is movably arranged in the second sleeve, and limiting mechanisms are arranged on the supporting cylinder, the protective cylinder, the first adjusting cylinder and the second adjusting cylinder. The top wall of the protection cylinder can be more tightly attached to the inner top wall of the mine tunnel by only needing one worker to step on one supporting leg with one foot and then rotating the rotating rod on the supporting column with two hands, the stability of the whole device can be guaranteed through the overall structure, meanwhile, the supporting procedure can be completed by one person, the labor cost is saved, and more time and labor are saved.
Owner:HUAIBEI MINING CO LTD
Supporting system for treating collapse of layered tunnel vault and construction method
The invention provides a supporting system for treating collapse of a layered tunnel vault and a construction method, and relates to the field of tunnel engineering.The supporting system comprises a top surrounding rock reinforcing unit and a tunnel main body structure which are arranged in a tunnel collapse area, and the supporting system is further provided with an arched I-shaped steel unit which is located in the tunnel main body structure to form primary supporting; and a supporting structure reinforcing unit for resisting the rock pressure in the tunnel collapse area and reinforcing the supporting force is arranged on the arched I-shaped steel unit. Through the cooperation of the structures, the structure has the following beneficial effects that firstly, the layered rock mass is asymmetrically reinforced through the grouting anchor rods, and the integrity and the self-bearing capacity of the top surrounding rock are improved to the maximum extent; and secondly, the surrounding rock is supported and reinforced through the spring rod supporting component, the secondary collapse phenomenon caused by overweight backfilled concrete or poor cohesiveness of the surrounding rock is avoided, and a concrete sealing layer with the thickness of 10 cm is laid on the surface of the surrounding rock through the concrete spraying technology.
Owner:CCCC (KUNMING) CONSTR CO LTD +1
Dangerous area-based combined vertical artificial column system setting method
The invention belongs to the technical field of island construction engineering, deep-sea mining and metal excavation stability, and discloses a method for arranging a combined vertical artificial column system based on a dangerous area. According to the method, the three-level artificial columns are scientifically reserved for the horizontal dangerous area in combination with calculation of field data. According to the scheme, the artificial columns which are higher in bearing capacity and better in stability compared with natural columns are adopted, and reasonable calculation and arrangement of the reserved size, the reserved thickness and the reserved position are conducted on the combined vertical artificial column system based on all excavation horizontal dangerous areas in the excavation process; the artificial column system has a supporting effect on surrounding rocks on different excavation levels and different vertical sections from the three-dimensional whole of a mining area. And the artificial columns at all levels cooperate to jointly bear the load effect, so that the stability of the surrounding rock of the stope is improved, and the safety of workers and operation equipment is more favorably guaranteed.
Owner:QINGDAO UNIV OF TECH
Extra-large mining height hydraulic support withdrawing process
The invention relates to the technical field of support withdrawing processes, in particular to an ultra-large mining height hydraulic support withdrawing process which comprises the following steps: SI, preparation work; s2, replacing a machine head end bracket; s3, replacing a transition bracket; s4, withdrawing the bracket and carrying out subsequent operation; according to the support withdrawing process, the support with the small size and the light weight is used for replacing an original machine head and machine tail end and a transition support, the difficulty and the operation risk in the support withdrawing and closing-up process are effectively reduced, and the situation that the support is pressed tightly is avoided; by means of the technology, the risk of retracting and closing-up operation of the support can be reduced to the maximum extent, meanwhile, the difficulty is reduced to the minimum, the retracting speed of the hydraulic support is increased, the support is not pressed tightly in the support retracting period, the retracting period can be shortened, and the production cost is reduced; in the withdrawing process, the safety and the stability in the withdrawing process can be ensured through a reasonable support replacement sequence, interlocking wood cribs are erected and round wood supporting columns are erected.
Owner:SHAANXI COAL IND GRP SHENNAN IND DEV CO LTD
Jacking system for excavation construction of cross passage and construction method using the same
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.
Owner:NINGBO YONGGONG TECHNOLOGY CO LTD
Coal mine deep high-stress roof stabilizing device based on truss collaborative structure
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.
Owner:TIANDI (YULIN) MINING ENG & TECH CO LTD
Water-based proportional valve and hydraulic support system
The invention relates to the technical field of coal mine hydraulic control, in particular to a water-based proportional valve and a hydraulic support system.The water-based proportional valve comprises a valve sleeve, a valve core, a valve core, a valve core, a valve core, a valve core and a valve core, the liquid inlet assembly comprises a liquid inlet valve element and a main spring, and the elastic force of the main spring acts on the liquid inlet valve element, so that the P port and the A port are disconnected; the liquid return assembly comprises a liquid return valve element, a pilot control cavity connected with the opening K is formed between the liquid return valve element and the plug, and when high-pressure liquid is injected into the pilot control cavity through the opening K, the liquid return valve element can be pushed to move towards the liquid inlet valve element; when the liquid return valve core is far away from the liquid inlet valve core, the T port is communicated with the A port through the liquid inlet valve core; when the liquid return valve element makes contact with the liquid inlet valve element, the T opening and the A opening are disconnected. And when the liquid return valve core pushes the liquid inlet valve core to move, the P port is communicated with the A port. The scheme is used for simplifying hydraulic valve element control, reducing system complexity and improving reliability and response speed.
Owner:BEIJING TIANMA INTELLIGENT CONTROL TECHNOLOGY CO LTD +1
Active protection structure and construction trolley
The embodiment of the utility model provides an active protection structure and a construction trolley, and relates to the field of tunnel construction. The active protection structure comprises a support and telescopic supporting legs. The telescopic supporting leg is rotatably connected to the support and used for abutting against the surrounding rock. In the tunnel construction process, the supports are used for supporting the telescopic supporting legs, the telescopic supporting legs abut against the surrounding rock to play an active protection role, the collapse probability of the surrounding rock can be reduced, casualties of workers are avoided, and therefore potential safety hazards are reduced. The construction trolley comprises a rack type trolley body and the active protection structure, the support is installed on the rack type trolley body, and the construction trolley has all functions of the active protection structure.
Owner:SICHUAN LANHAI ENG EQUIP MFG CO LTD
Mining single prop shoe
The utility model discloses a mining single prop shoe which comprises a prop shoe body plate, an outer cover is arranged at the top end of the exterior of the prop shoe body plate, a connecting ring is arranged at the top end of the prop shoe body plate, a reinforcing frame is fixed to the bottom end of the exterior of the connecting ring, and a connector is fixed to the bottom end of the connecting ring. And a connecting groove is formed in the top end of the column shoe main body plate. When the mining single prop shoe is used through the prop shoe, the connecting head fixed at the bottom end of the connecting ring can be correspondingly screwed into the connecting groove in the top end of the prop shoe main body plate to be screwed tightly, then the connecting ring can be installed and fixed at the top end of the prop shoe main body plate, and the arranged connecting ring and the prop shoe main body plate are installed and connected through the connecting groove and the connecting head; the detachable structure facilitates independent disassembly and replacement of the damaged assembly after the support column shoe assembly is damaged, the use cost of the column shoe is saved, and the problem that the support column shoe assembly is inconvenient to disassemble and replace is solved.
Owner:SHANDONG HUICHUAN ELECTROMECHANICAL EQUIP CO LTD
Non-uniform-strength supporting control method in cutting process
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.
Owner:SHANDONG UNIV OF SCI & TECH
Dust blocking method for working space of fully-mechanized face personnel
The invention discloses a dust blocking method for a working space of fully-mechanized face personnel, and belongs to the technical field of coal mine dust treatment. The invention provides a comprehensive blocking scheme for solving the problems that in the prior art, fully-mechanized face dust is high in concentration and serious in diffusion, and workers are prone to suffering from pneumoconiosis. According to the method, a wireless dust source tracking spraying device is arranged on the outer side of a coal mining machine, and dust generated by coal cutting is settled and guided; a coal mining area and a personnel activity area are physically separated by utilizing an efficient dust blocking and isolating device on the hydraulic support; a negative-pressure micro-mist dust remover is arranged in front of a stand column of a top beam of the support to suck and purify dust near the top beam; and a support dust receiving device is installed on the hydraulic support and used for collecting dust generated by descending the column and moving the support. The method can effectively reduce the dust concentration in the working space of workers on the fully-mechanized coal mining face, reduces the risk of pneumoconiosis of miners, and provides convenience for source-divided and domain-divided treatment of dust on the fully-mechanized coal mining face.
Owner:CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
Coal mine supporting structure with early warning function
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.
Owner:SICHUAN RONG GRP YIBIN CHUANNAN CONSTRUCT ENG CO LT +1
Hydraulic control one-way valve
The hydraulic control one-way valve comprises a valve body and a valve element assembly, the valve element assembly comprises an ejector rod, a liquid inlet sleeve, a valve sleeve, a large valve element, a small valve element and a first spring used for applying elastic acting force to the small valve element, and the small valve element comprises a first guide section, a sealing section and a second guide section which are sequentially arranged. The second guide section is sleeved with the first spring, a guide hole allowing the second guide section to be inserted therein is formed in the valve sleeve, and a first liquid passing channel used for guiding liquid in the liquid inlet sleeve into the valve sleeve is formed in the first guide section. According to the hydraulic control one-way valve, the guide hole is formed in the valve sleeve to guide the small valve element to move, so that the valve sleeve can support the small valve element, the small valve element cannot deflect in the moving process, the spring is not prone to lateral bending and breakage, and reliability is improved.
Owner:JULONG GROUP WUHU XINGLONG HYDRAULIC
Self-adaptive supporting pillar based on multi-modal perception, height adjusting method and device thereof, storage medium and electronic equipment
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.
Owner:XIAN UNIV OF SCI & TECH
Method for intelligently identifying working state of hydraulic support
The invention discloses a method for intelligently recognizing the working state of a hydraulic support. The method is a method for recognizing the working state of the hydraulic support based on an improved full convolutional network of multi-scale feature fusion. By collecting and preprocessing hydraulic support stand column pressure data and utilizing the multi-scale feature extraction and self-adaptive feature fusion technology, accurate recognition of the working state of a hydraulic support is achieved, and the state conversion period is effectively processed. A soft label mode is adopted for data labeling, and the recognition precision in the state conversion period is improved. The method has the advantages of high practicability, high identification accuracy and high automation level, and is suitable for hydraulic support state monitoring in coal mine safety production.
Owner:CHINA UNIV OF MINING & TECH
Coal mine tunnel supporting structure
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.
Owner:SICHUAN PROVINCE CHUANNAN COAL CO LTD
Portable temporary supporting device for coal mining
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.
Owner:ZAOZHUANG MINING (GRP) JINING DAIZHUANG COAL IND CO LTD
Mine supporting method, device and equipment
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.
Owner:CHINA MINMETALS CHANGSHA MINING RES INST +1
Modular removable primary support steel frames
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).
Owner:CHINA COMMUNICATIONS CONSTRUCTION CORP +3
Resistance-increasing type energy-absorbing and impact-stopping method for roadway hydraulic support and energy-absorbing component
The invention relates to the technical field of roadway supporting, in particular to a roadway hydraulic support resistance-increasing energy-absorbing and impact-stopping method which comprises an energy-absorbing component arranged in a support, a support base used for supporting a roadway bottom plate is arranged below the energy-absorbing component, and a stand column and a support top beam used for supporting a roadway top plate are arranged above the energy-absorbing component. Starting from the energy-absorbing abdicating displacement of the energy-absorbing component, the bearing reaction generated by the energy-absorbing component is increased along with the increase of the abdicating displacement, and the characteristic of resistance-increasing type energy absorption is presented; in the energy absorption abdicating process of the resistance-increasing type energy absorption component, the pressure of the emulsion in the stand column is in the rising trend, but is not higher than the peak pressure of the emulsion at the initial moment of energy absorption starting all the time; under the condition of the same energy absorption amount, the effective energy absorption stroke required by the resistance-increasing type energy absorption component is shorter; according to the stand column provided with the resistance-increasing type energy absorption component, at the end of energy absorption receding, the hard impact bearing reaction peak value generated by the stand column and a support base is smaller than the bearing reaction peak value of a stand column provided with a constant-resistance energy absorption component.
Owner:LIAONING TECHNICAL UNIVERSITY +1
Negative angle top caving along void self-boring method
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.
Owner:TAIYUAN UNIVERSITY OF TECHNOLOGY
A detachable safety support device for mine tunnel
Owner:SHENHUA MENGXI COAL CHEM CO LTD
Multi-size mine roadway supporting device
Owner:山西中晟圣达矿业安全工程技术有限公司
Roadway supporting structure
The utility model discloses a roadway supporting structure which comprises two arch-shaped frames, two symmetrical adjusting columns are movably connected to the lower end faces of the two arch-shaped frames, fixing columns are slidably connected to the ends, away from the arch-shaped frames, of the adjusting columns, movable grooves are formed in the fixing columns, and a plurality of evenly-distributed locking grooves are formed in the sides, away from the center positions, of the adjusting columns. A positioning frame is fixedly connected to the side, away from the center position, of the fixing column, a telescopic rod is slidably connected to the positioning frame, a locking block is fixedly connected to one end of the telescopic rod, and a diagonal plane is arranged on the lower end face of the locking block. Meanwhile, the adjusting column and the arch-shaped frame can be directly moved upwards in cooperation with the use of a diagonal plane of the locking lower end face, rapid adjustment of the arch-shaped frame can be achieved, a locking block and a locking groove can be rapidly locked in cooperation with a spring and an elastic hose, the supporting height of the arch-shaped frame can be rapidly adjusted and locked, and the installation and adjustment efficiency is improved.
Owner:SUNCUN COAL MINE OF XINWEN MINING GRP CO LTD +1
Supporting structure suitable for tunnel curved surface monitoring and dynamic adjustment
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.
Owner:SHANDONG LUQIAO GROUP CO LTD
Pressurizing system of hydraulic liquid injection pump
A hydraulic liquid injection pump pressurization system comprises a box body, a pressurization cylinder body is arranged in the box body, a piston assembly is arranged in the pressurization cylinder body, and the pressurization cylinder body is divided into an X cavity, a Y cavity, a Z cavity and a U cavity, a supporting plate is arranged in the box body, the bottom of the supporting plate is connected with a supporting rod, the bottom of the supporting rod is connected with a bearing block installed on the side face of the box body, and the pressure cylinder set is located on the bearing block. The Z cavity and the U cavity are connected with the emulsion tank through a first liquid path and connected with the high-pressure oil outlet through a second liquid path, and the first liquid path and the second liquid path are each provided with a one-way valve. Therefore, the reversing of static pressure water is more accurate and timely, the automation degree of the hydraulic liquid injection pump is improved, and the liquid injection pump can be conveniently used in a narrow underground space.
Owner:SHANDONG HAOZHOU MINING SAFETY EQUIP CO LTD
Supporting structure of hydraulic support
The invention relates to the technical field of coal mine underground supporting equipment, and discloses a hydraulic support supporting structure which comprises an outer sleeve, trapezoidal threads are in threaded connection with the interior of the outer sleeve, a middle piston rod is fixedly connected with the inner wall of the trapezoidal threads, and the outer wall of the middle piston rod is arranged on the inner wall of the outer sleeve. A connecting block is fixedly connected to the lower surface of the outer sleeve, a stabilizing assembly is arranged on the outer wall of the connecting block, a sealing ring is arranged on the inner wall of the outer sleeve, the inner wall of the sealing ring makes contact with the outer wall of the trapezoidal thread, and an inner piston rod is slidably connected to the inner wall of the middle piston rod. The inner piston rod is pushed to move upwards through high-pressure oil, then the middle piston rod is driven to move upwards, when the middle piston rod moves upwards, the trapezoidal threads between the middle piston rod and the outer sleeve rotate and ascend, after bearing is conducted, the trapezoidal threads can provide self-locking force, axial sliding of the piston rods is avoided, and therefore the bearing capacity and compressive strength of the stand column are improved.
Owner:BEIJING LANGDE COAL MINE MACHINERY