2542results about "Props/chocks" patented technology

The invention relates to a composite support device of a dynamic pressure softrock tunnel based on a steel pipe concrete bracket, which comprises a steel pipe concrete bracket, wherein a flexible pressure sharing and releasing layer is arranged between the steel pipe concrete bracket and supported surrounding rock. The composite support device also comprises a surrounding rock grouting and reinforcing device, wherein the surrounding rock grouting and reinforcing device comprises a plurality of hollow surrounding rock grouting anchor rods, and the surrounding rock is grouted by the hollow anchor rods; after being injected with a concrete layer, the surrounding rock is covered by a flexible seal layer; and the steel pipe concrete bracket is provided with a vertical column shaped or Y-shaped or T-shaped high-strength steel pipe concrete strut. The high-strength steel pipe concrete bracket and the flexible pressure sharing and releasing layer are two necessary technologies; and the flexible seal layer, the surrounding rock grouting and reinforcement and the high-strength steel pipe concrete strut are three optional technologies. The flexible pressure sharing and releasing layer is combined with the steel pipe concrete bracket so that the whole support system combines hardness with softness, has simple structure, low cost and high support resistance and can effectively control the stability of large deformed tunnels of deep well softrock dynamic pressure, and the like.

A modular manufacturing station is provided. The modular manufacturing station has a plurality of beams forming a skeleton and being capable of extension and retraction. The modular manufacturing station also has at least one utility connection for receiving external utilities. Additionally, the modular manufacturing station has at least one piece of manufacturing equipment. Furthermore, the modular frame has a control system configured to regulate operation of the manufacturing equipment.

The invention discloses a thick seam large mining height working face gob-side entry retaining method, wherein a flexible yield airbag is installed on the deformed space retained on the top part of the filling body besides the lane; the height of the filled airbag is equal to the prediction value of the sinking quantity of the top plate; the airbag is filled with air, the inflation pressure is 3MPa; a one-way decompression valve is installed on the bag body and the decompression pressure is 4MPa. The flexible yield airbag is arranged, thus on the one hand, effectively protecting the filling body besides the lane and achieving the purpose of gob-side entry retaining, and on the other hand, preventing the coal in the gob from spontaneous combustion, ensuring safe production and simultaneously improving the mining coefficient of the coal.

An embodiment of a system and method for moving an object in two or more axes includes one or more fluid containers, each of which is directly or indirectly in physical contact with the object. A volume of a fluid is placed in the one or more fluid containers. The system further includes a fluid mover operably connected to the one or more fluid containers for moving the fluid into the one or more containers, and a fluid volume control for controlling the volume of fluid in the one or more containers. By changing the volume of fluid in the one or more containers, the containers are variably pressurized, thereby moving the object in one or more axis. The object may be supported at one or more pivot points that allow the object to be moved in multiple axes.

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 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.

A rapidly-erectable lightweight load resisting system for the construction of buried arched bridges, tunnels or underground bunkers, has a plurality of lightweight arched tubular support members which are formed of a fiber reinforced polymer material and are substantially oriented in a vertical plane. The lightweight tubular support members are connected by at least one or more lateral force resisting members which are positioned in a direction perpendicular to the vertical plane of the tubular support members, and which are capable of transferring vertical loads to the tubular support members and of providing lateral-load capacity to the load resisting system. The tubular support members are fitted with one or more holes near the top which allows them to be filled with a suitable material to provide additional strength or stiffness.

A method for supporting and protecting gob roadway walls built along the gob road-way is characterized in that the filling bodies of gob roadway walls are built along the working surface at the side of the goaf to establish a supporting and protecting belt for gob roadway walls. The method can effectively control the roof delamination of a direct roof and can timely cut off the roof and the lower basic roof and also can fill out goaf with the falling recrement, thereby reducing the bending of the basic roof, and the loading of the inner supporting and protecting structure and the deformation of the wall rock of the gob roadway, as well as keeping the stability of the gob roadway, meanwhile, the method also can seal the goaf, prevent air leaking and spontaneous combustion of coal, and avoid harmful air coming into the working area.

A pneumatic lift device that has a lift unit and an activatable air supply connected to the lift unit with the lift unit having a substantially rectangular base with four sides and a substantially rectangular lift platform connected to the base by a hinge mechanism that includes four foldable side panels connected to the four sides of the base and lift platform with the lift unit having an expandable bladder between the base and lift platform, wherein on expanding the bladder with pressurized air from the air supply, the lift platform rises from the base.

The invention discloses a top breaking gob-side entry retaining method for tender roofs. The top breaking gob-side entry retaining method includes steps of firstly, reinforcing and supporting the tender roofs of roadways jointly supported by original anchor meshes and cables or supported by sheds; secondly, laying wire meshes on gob sides; thirdly, preliminarily breaking the roofs of the roadways on the gob sides; fourthly, piling up preliminarily broken caved gangue until the caved gangue reaches rock of upper-end hard roofs to form gangue piled walls; fifthly, burying perforated grouting pipes in the formed gangue walls, spraying concrete on the surfaces of the wire meshes and the surfaces of the gangue walls to form concrete sprayed supporting layers; sixthly, injecting concrete grout in each preliminarily buried grouting steel pipe by the aid of a grouting pump after the concrete sprayed supporting layers are solidified; seventhly, sequentially detaching falling preventing devices and dense reinforcing columns along with advancing of working faces; eighthly, reinforcing and supporting the roofs under special conditions. The top breaking gob-side entry retaining method has the advantages that active bearing supporting effects can be realized for inherent characteristics of the tender roofs, supporting forms are simple, the cost is low, and entry retaining effects can be efficiently realized.

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 present invention discloses a kind of supporting equipment. It includes several steel pipes, the adjacent two steel pipes are mutually connected by means of connecting pipe, the interior of every steel pipe is filled up with concrete, and the butt-jointed position of two adjacent steel pipes is equipped with wood pad or other flexible pad, in the centre of said flexible pad is cut a through hole through which the concrete can be flowed on the side portion pipe wall of said supporting equipment a grouting hole is cut, and on the upper portion pipe wall of said supporting equipment an air exhaust hole is cut. Said supporting equipment can be used for roadway support.

The invention discloses a method for coal mining to the greatly oblique coal layer, comprising two steps: designing the method and back producing technique, placing slit flexible shielding support in the coal layer of 8-10m and deciding return airway and cutting point; the back producing technique includes enlarging airway, installing support, put down support and desinence of working face, etc. The method has simple operational steps as well as remarkable economic benefit.

The invention relates to a laser cladding method for a mining hydraulic column and a mining hydraulic column. The laser cladding method for a mining hydraulic column comprises the steps as follows: a laser beam and a nickel-based alloy powder stream output by a powder feeder are utilized to form helical scanning along the surface of a movable column of a column body 1; the section of the laser beam output by a laser head is set into a (15-20mm)*(1.5-2.5mm) rectangular spot, the scanning linear velocity of the laser beam is set at 480-720 mm/min, and the output power of the laser for outputting the laser beam is set at 7200-7400 W, wherein the nickel-based alloy powder output by the powder feeder contains the following components in percentage by weight: not more than 0.15% of C, 0.5-1.0% of Si, 0.4-0.8% of Mn, 17.5-19.5% of Cr, 21-25% of Ni and the balance of Fe; and a mining hydraulic column with a laser cladding layer (2) which has a thickness of 0.4-0.7 mm and is formed by laser cladding of the nickel-based alloy powder is arranged on the movable column of the column body (1). Thus, the service life of the column is prolonged.

The invention relates to an intelligent emulsion pump station used in the mine, which belongs to a safe production equipment of coal excavation and comprises an emulsion tank, an emulsion pump, an emulsion pipeline, an emulsion pump station controller. The invention is characterized in that: the emulsion pump station controller comprises a primary control circuit, a secondary control circuit and a PLC programmable controller system control circuit; a pressure sensor (8), a liquid level sensor (14),a concentration sensor (15) and an oil level sensor (18) are arranged in the emulsion tank; a temperature sensor (5) is arranged on an emulsion pump (25); the pressure sensor (8), the liquid level sensor (14),the concentration sensor (15) and the oil level sensor (18) and the temperature sensor (5) are connected with the emulsion pump station controller through a cable. The pumping station adopts constant pressure variable feed liquid, speed control by frequency variation and intelligent control, the two pumps can mutually switch over automatically; the liquid level and the oil level are controlled automatically, the temperature of the emulsion pump is supervised automatically, the safe pressure relief protection and the automatic liquid blending improves the service life of the hydraulic support, highlights the explosion proof security in the coal mine; the working performance is reliable and the operation of the pumping station is economical and energy-saving.

Provided is a lifting device, lifting system and method for lifting a vehicle. The lifting device according to the invention includes a frame with a carrier configured for carrying the vehicle; a drive which acts on the carrier, wherein the drive includes an integrated hydraulic cylinder drive unit configured for raising the carrier with the integrated hydraulic cylinder drive unit including: a housing of a cylinder; a piston rod movable in the housing; a height measuring system configured for measuring the displacement of the piston rod; and an integrated hydraulic fluid tank and motor unit that is configured for driving the piston rod.

A method and device for supporting a structure above a fixed surface. The device can include a support pedestal whose height is adjustable through a range of heights without a substantial gap in the obtainable heights. In one embodiment, the support pedestal can include a base member, a support member and a coupling member operatively connecting the base member and the support member. The coupling member can include first and second cylindrical walls, whereby an outer wall of the coupling member bears directly on an outer wall of the base member. Locking members can be utilized to operatively attach the coupling member to at least one of the base member or the support member. The locking members can function to increase the structural stability of support pedestal.

The invention discloses a hydraulic bracket posture detecting method and device based on multi-sensor data fusion, belonging to the method of detecting the posture of the hydraulic bracket on the coal mine underground fully mechanized working face. The detection method of the hydraulic bracket posture comprises the steps of: in the system structure, adopting an insulating coupler for insulating a power supply; real-time collecting the pressure, the displacement and the inclination information of the hydraulic bracket; analyzing and synthesizing the collected information; detecting the posture of the bracket by multiple information sources; adjusting the bracket by a bracket posture detector according to the obtained bracket posture information; simultaneously displaying the posture information locally and giving a audible and visual alarm; and uploading the posture information of the bracket on working face to an underground gateway main control computer through a CAN bus network. According to the hydraulic bracket posture detecting method and device based on multi-sensor data fusion, the data of pressure, displacement and inclination and information from multiple information sources of the bracket are fused, the posture information of the bracket can be accurately obtained, the posture of the bracket is amended according to current posture information, therefore, the real-time on-line detection of the bracket posture is realized so as to ensure the bracket to operate reliably and safely.

The invention discloses a tunnel yielding type shoring system and relates to the field of traffic and mining soft rock large-deformation tunnels. Stretchable units are arranged on a shoulder part and a waist part of each steel arch frame; the stretchable units are connected with the steel arch frame through flanges; each stretchable unit is composed of a stretchable component and a rectangular rubber damper; stretchable components are arranged at the two ends of each steel arch frame; a deforming slot is reserved between the stretchable components; the rectangular rubber damper is arranged in the deforming slot; a separating plate is arranged between the rectangular rubber damper and a sprayed concrete layer; a plurality of yielding anchor rods are arranged on the sprayed concrete layer at intervals. According to the invention, a combined body composed of the yielding anchor rods, the stretchable components, the steel arch frame, the rectangular rubber damper and the sprayed concrete generates uniformly harmonious deformation with the surrounding rock, so that the surrounding rock stability can be effectively maintained by a certain supporting resistance, and meanwhile, the shoring system is allowed to generate a certain displacement, and the functions of shoring, yielding and unloading can be achieved.

The invention discloses a method for actively supporting a lane side filling gob-side entry retraining. Firstly, a lane interior support and an enforcing support are built on a reserved lane according to a sounding rock condition and a working face. On the back of the working face, nogs, gangues or blockworks and the like are adopted to build a lane side filling wall along the edge of a gob. High-strength and sealed filling bags are paved on the filling wall, and high-expanding materials or cement coagulation serous fluid added with a rapid hardening early strength agent is filled into the filling bags through a grouting pump. The enforcing support is dismounted after a top plate behind the working face is movably stabilized, the high-strength and sealed filling bags are enabled to be contacted tightly with the top plate, and active support force is formed to be exerted on the top plate. By means of the active support force provided for the lane side filing wall, the top cutting capacity of a lane side filling body is enhanced, initial deflection of the entry retaining top plate is reduced, the stability of the top plate is improved, the quality of the gob-side entry retaining is improved, and repair rate of the gob-side entry retaining is reduced. The method is simple, convenient to operate and good in effect.