114results about "Shaft equipment" patented technology

The invention relates to the technical field of hydraulic engineering construction, and discloses a shaft excavation ground surface settlement monitoring device which comprises a base, and a lifting mechanism is installed at the top of the base and used for lifting the position of a top monitoring structure; the rotating mechanism is mounted at the top of the lifting mechanism and is used for adjusting the direction of the top monitoring structure; and the monitoring mechanism is mounted at the top of the rotating mechanism and is used for monitoring ground surface settlement. The method comprises the following steps: step S1, a measuring point laying step; step S2, a data acquisition step; step S3, a data transmission step; s4, a data analysis and early warning step; and S5, a feedback and control step. According to the invention, through the combined application of the static force level gauge and the micro-differential pressure liquid level sensor and the precise positioning of the lifting mechanism and the rotating mechanism, continuous and high-resolution relative elevation measurement can be carried out on the local area around the vertical shaft.

The invention discloses a safety protection system for vertical shaft construction. The safety protection system comprises a vertical shaft; the safety disc is horizontally arranged in the vertical shaft in a manner of moving up and down and is used for preventing articles from falling into the shaft bottom; the lifting driving assembly is used for driving the safety disc to do lifting motion in the vertical shaft; the guide mechanism is arranged between the shaft wall of the vertical shaft and the safety disc and used for guiding the safety disc to stably ascend and descend in the vertical direction of the vertical shaft; and the locking mechanism is arranged between the safety disc and the guide mechanism, and when the safety disc falls at a speed exceeding a certain speed, the locking mechanism can cooperate with the guide mechanism to prevent the safety disc from falling. The beneficial effects of the invention are that personnel safety and equipment completeness can be guaranteed at the same time.

The invention discloses a deep-shaft long-distance shield tunnel positioning measurement structure and measurement method, and relates to the technical field of tunnel construction, the deep-shaft long-distance shield tunnel positioning measurement structure comprises a long-distance tunnel excavated along the underground and two deep shafts communicated with the tunnel, a fixed support is arranged at the wellhead position of each deep shaft, and a steel rope is vertically put down by the fixed support towards the direction of each deep shaft; the fixing support is movably provided with a positioning frame, the positioning frame is provided with a positioning hole for a steel rope to penetrate through, the fixing support is provided with a leveling assembly for keeping the positioning frame horizontal, the fixing support is provided with a first driving part for driving the positioning frame to move, and the side, close to the deep shaft, of the positioning frame is provided with a guide assembly corresponding to the steel rope. And infrared distancers facing the positioning frame are arranged on the fixing bracket on the two sides of the positioning frame. The first driving piece drives the positioning frame to move, the position of the steel rope in the horizontal plane of the deep shaft is rapidly adjusted, the adjusted position of the steel rope is measured and calculated again through the infrared distance meter, and it is guaranteed that the vertical datum line of directional measurement is remeasured accurately.

The invention belongs to the technical field of water conservancy and hydropower engineering, and particularly discloses a vertical shaft inlet structure with a broken line weir, which comprises a ventilation column and a plurality of drainage plates, the ventilation column is arranged in the center of the shaft; the multiple drainage plates are arranged in the circumferential direction of the ventilation column, and an overflowing area is formed between every two adjacent drainage plates; one end of each drainage plate is fixedly connected with the ventilation column, the other end of each drainage plate is fixedly connected with the shaft wall of the vertical shaft, and the edge of each drainage plate is provided with a broken line weir. The drainage plates are arranged, so that part of water flow can be guided to the center of the vertical shaft, and the overflowing space is increased. Meanwhile, water flow can not only enter the vertical shaft along the well wall, but also overflow into the vertical shaft along the broken line weir at the edge of the drainage plate, so that the overflowing width is greatly increased, and the overflowing capacity is improved. The vertical shaft inlet structure with the broken line weir further has the advantages of being simple in structure, easy to construct and the like.

The utility model discloses a diving tubular pump with fully-adjustable shaft overflowing blades, and relates to the technical field of water conservancy projects. The device comprises a diving tubular pump, the left end of the diving tubular pump is connected with a round-square gradually-changing flow channel through a left-end expansion joint, and the right end of the diving tubular pump is connected with a vertical shaft flow channel through a right-end expansion joint; a vertical shaft is arranged in the vertical shaft flow channel; an asynchronous submersible motor, a planetary gearbox, a thrust bearing box, a pump section hydraulic model and a hollow adjusting shaft are sequentially arranged in the submersible tubular pump from left to right, and the right end of the hollow adjusting shaft extends into the vertical shaft to be connected with a built-in synchronous hydraulic adjusting mechanism. Diffusion type guide vanes are not arranged any more, excellent conventional pump section hydraulic models, such as south-to-north water diversion series and the like, which are already checked and affirmed can be directly utilized, and meanwhile dynamic operation full adjustment of the vanes of the submersible tubular pump is achieved.

The application discloses a well wall supporting device and a construction method thereof, which comprises a hinged seat, two groups of hinged rods movably arranged on the two sides of the hinged seat, a connecting piece arranged at the end of one group of the hinged rods, a buckling piece adapted to the connecting piece arranged at the end of the other group of the hinged rods, and an adjusting sliding groove arranged on each of the two groups of the hinged rods. When the device is used, the connecting piece and the buckling piece are used to connect the two groups of the well wall supporting devices to be arranged in a ring shape around the well wall, then a hydraulic device is connected to the piston rod, the internal pressure of the hydraulic adjusting part is increased, a mutual resisting ring structure is formed between the supporting devices, the resisting plate is in contact with the well wall by driving the hydraulic telescopic pipe as the internal pressure of the hydraulic adjusting part continuously increases, and the well wall is supported. The above structure has good adaptability, can be adapted to different diameter use scenes, and effectively improves the overall operation efficiency.

The utility model discloses a pipe wall seepage water spiral collecting and discharging system for vertical shaft TBM tunneling construction, and belongs to the technical field of vertical shaft construction. A pipe wall seepage water spiral collecting and discharging system for vertical shaft TBM tunneling construction comprises water collecting tank sections which are provided with fixing openings and installed on the inner wall of a vertical shaft at the inclination angle of 45 degrees, a water collecting tank is installed on the inner wall of the vertical shaft of the water collecting tank section located at the tail end, a water suction pump is arranged in the water collecting tank, and the water suction pump pumps accumulated water out of the vertical shaft through a drainage pipeline. A T-shaped connector is formed between every two adjacent water collecting tank sections, a first silica gel strip is installed at each connector, the multiple water collecting tank sections are connected to form a spiral shape, water can be concentrated and guided to the bottommost water collecting tank, a water suction pump arranged inside is automatically started, accumulated water is pumped out of a vertical shaft through a drainage pipeline, and the water collecting tank is arranged at the bottom of the vertical shaft. The whole process can be automatically operated, accumulated water is timely drained, and the influence on the construction environment is avoided.

The utility model belongs to the technical field of wall protecting pipes, and particularly relates to a special connecting wall protecting pipe for a special anti-penetrating thick-wall deep well, which comprises a pipe, a pipe step and an inner wall lantern ring, one end of the pipe is pushed outwards through a die and expanded outwards to form the pipe step, and the pipe step is matched with a pipe body of the pipe in a matched mode. A step-shaped gap for embedding the inner wall lantern ring in a matched manner is formed between the pipe step and the end part of the pipe inserted into the pipe step, and the pipe, the pipe step and the inner wall of the inner wall lantern ring are connected to form a smooth curved surface. After the two pipes are connected in an inserted mode through the pipe steps, the inner wall lantern ring embedded between the two pipes enables the inner walls of the two pipes to be connected to form a smooth and continuous curved surface, and therefore the situation that the pump is scraped or the safety of the pipes is affected when the pump is put down and taken out is avoided.

A modular platform system for vertical ore stope mining, comprising: a top platform having an access opening formed therein for accessing a raise opening of a raise above a stope of a mine; an equipment deck adapted to receive equipment; and, at least one winch having at least one respective cable coupled thereto, the at least one winch mounted on the top platform, the at least one cable extendable through the access opening, the at least one cable having at least one respective cable end coupled to the equipment deck; wherein the at least one winch is operable to move the equipment deck and the equipment between a raised position proximate a top of the raise at the top platform and a lowered position proximate a bottom of the raise at a top of or within the stope.

The invention discloses a method for repairing a shaft of a coal mine non-stop air return vertical shaft, which comprises the following steps of: firstly, carrying out water cutting and punching on an anti-explosion cover, installing a lifting system, and then assembling an assembled fixed disc and a special-shaped construction hanging scaffold in the shaft underground by utilizing a personnel safety channel and by virtue of protection of a steel wire rope; well wall broken points and concentrated water spraying points which are explored in advance are reinforced and blocked; and fifthly, after the air return vertical shaft is repaired, under the protection of a lifting system, the special-shaped construction hanging scaffold and the assembly type fixing disc in the shaft are disassembled in a blocking mode and conveyed out of the shaft through a personnel safety channel, and finally a ring fire reinforcing mode is adopted for sealing and reinforcing a drilled hole of the anti-explosion cover. The unfavorable conditions of high air speed, high dust, high noise and high gas of the air return vertical shaft can be overcome, the whole repairing process can ensure that the mine does not stop working, the problems that a traditional coal mine shaft is low in repairing efficiency and multiple in potential safety hazard can be solved, and meanwhile high efficiency, safety and adaptability are achieved.

The application provides a tankway joint width detection vehicle and a detection method. The tankway joint width detection vehicle comprises a vehicle frame and a data processing control unit. One side of the vehicle frame is provided with wheels, a signal emitting head A and a signal receiving head A. The signal emitting head A and the signal receiving head A are arranged along the traveling direction of the vehicle frame. Straight line signals emitted by the signal emitting head A can be reflected to the receiving end of the signal receiving head A through the side wall of the tankway. The signal emitting head A is signal connected with the signal output port of the data processing control unit, and the signal receiving head A is signal connected with the signal input port of the data processing control unit. According to the application, the data processing control unit automatically reads the time interval of signal disconnection of the signal receiving head and calculates the joint width H. The joint width H is rapidly detected, the detection efficiency is improved, the workload and the data volume are small, and the manpower and equipment cost are saved.

The invention provides a transformation method, a lowering device and a lowering method based on an air shaft, and relates to the field of constructional engineering construction.By transforming head sheaves, guide wheels and steaders left in the air shaft and adjusting the positions of the head sheaves, the guide wheels and the steaders, the head sheaves, the guide wheels and the steaders meet the hoisting requirement of large equipment, the equipment left in the air shaft is fully utilized, and the hoisting efficiency is improved. The end face of the air shaft is large, so that the air shaft has the effect of lowering large-scale equipment, the disassembly degree of the large-scale equipment is reduced, the difficulty of assembling at the shaft bottom in the later period is avoided, in addition, the structure of the round girder is optimized, self-balance can be achieved when the round girder inclines slightly, and the service life of the round girder is prolonged. And the situation that large-scale equipment is collided in the lowering process and breakage occurs due to the fact that part of steel wire loads are exceeded is avoided.

The invention relates to a method and device for reinforcing a well mouth earth surface strongly-weathered rock stratum of a deep shaft. In the method for reinforcing the well mouth earth surface strongly-weathered rock stratum of the deep shaft, the ground is cleaned and leveled. A plurality of foundation piles are arranged in the circumferential direction of a wellhead of the deep vertical shaft, extend along the axis of the deep vertical shaft and partially extend into the strongly weathered rock stratum. The sides, close to the axis of the deep shaft, of the foundation piles form an inner contour line, circles of the foundation piles form a center loop line, and the inner side face contour line of the deep shaft is located between the inner contour line and the center loop line so as to determine the inner side face contour line of the deep shaft. And counter-pulling from the bottom of the deep shaft to the wellhead along the inner side profile of the deep shaft. According to the method, after the stable foundation piles are formed, the outline of the deep shaft is defined, then counter-pulling is conducted in the outline, the structural stability is guaranteed, the counter-pulling cutting part is mainly the structure of the foundation piles, therefore, the situation that loose blocks fall off is prevented, and the construction efficiency, safety and stability of the deep shaft are improved.

A rack-and-gear type well sinking platform system for ultra-deep vertical shafts and its usage method are disclosed. The system comprises: a rack-and-gear mechanism including a strip support plate and racks mounted on the strip support plate; a gear climbing mechanism installed at the edge of the climbing support plate, including a connecting frame and a drive device; the connecting frame is mounted on the climbing support plate via a connecting assembly; the drive device is mounted on the connecting frame, and its output end is equipped with a drive gear; the drive gear meshes with the racks; and a support shoe stabilizing mechanism installed at the edge of the support shoe, including an inner guide support assembly and an outer support shoe stabilizing assembly, the outer support shoe stabilizing assembly including a support shoe cylinder and a stabilizing support shoe. The method utilizes the gear climbing mechanism and the support shoe stabilizing mechanism to fix the well sinking platform's position within the well wall; the gear climbing mechanism drives the entire well sinking platform to move up and down within the well wall. This invention enables the well sinking platform to autonomously and continuously rise and fall and be fixed at any position within the well, meeting the construction requirements of ultra-deep vertical shafts.

The utility model relates to the technical field of locks, in particular to a limited space illegal operation blocking device which comprises a lock cylinder assembly, a protection assembly and a squeezing and pushing assembly, the lock cylinder assembly comprises a mandrel, and the squeezing and pushing assembly can push the lock cylinder assembly to release the locking state of the lock cylinder assembly under the action of external force. And the protection assembly can coaxially rotate with the core shaft when the lock cylinder assembly is in an unlocking state. By arranging the protection assembly, a second defensive line can be arranged in the vertical shaft, the situation that personnel without permission enter the vertical shaft illegally, danger is caused to underground personnel, and underground facilities are damaged is prevented, and the safety of the vertical shaft facilities is improved; by arranging the lock cylinder assembly and the extruding and pushing assembly, physical locking and unlocking of the lock are achieved, power supply is not needed, an unlocking command is remotely received in cooperation with an intelligent key, the operation authority of an operator is ensured, and wrong operation is avoided.

The utility model belongs to the technical field of hanging scaffold structures, and particularly relates to a hanging scaffold structure for installing mine shaft equipment, which comprises a lower-layer hanging scaffold, a middle-layer hanging scaffold, an upper-layer hanging scaffold, a horn mouth cylinder and a stand column, the surfaces of the middle-layer hanging scaffold and the upper-layer hanging scaffold are respectively connected with a horn mouth cylinder in a penetrating manner, the bottom sides of the middle-layer hanging scaffold and the upper-layer hanging scaffold are respectively connected with a limiting strip, the inner wall of the limiting strip is provided with a mounting plate, the lower surface of the mounting plate is provided with a hanging scaffold fixer, one side of the mounting plate is provided with a telescopic rod, and the telescopic rod is arranged on the lower surfaces of the middle-layer hanging scaffold and the upper-layer hanging scaffold. According to the utility model, when the telescopic rod runs, the hanging scaffold fixer can be driven by the mounting plate to transversely move, and when the hanging scaffold fixer transversely moves to the wall of a mine, the stability of the hanging scaffold structure can be ensured by the hanging scaffold fixer, so that the problem that the hanging scaffold fixer cannot stabilize the hanging scaffold structure due to the large size of the mine can be avoided.

The utility model discloses a vertical shaft operation anti -falling buffer protection structure relates to vertical shaft anti -falling technical field, the utility model discloses a mounting ring, first arc plate, the quantity is multiple, and multiple first arc plate is in annular array distribution and is installed in the bottom of mounting ring, first adjusting assembly, first adjusting assembly is installed in the bottom end of mounting ring, and it is used to drive multiple first arc plate to gather or separate and open, the utility model discloses a first arc plate and first adjusting assembly fast positioning form rigid intercepting surface, and the overall position of fixing device, and second arc plate cooperation guard board and buffer component, and the falling impact is converted into elastic potential energy and is gradually attenuated, and the structural peak load is reduced significantly, and the protectivity of this device is greatly improved, and this device is installed in the vertical shaft of different diameters, need not cutting welding to adapt to different well diameter and lining error, and the dismounting is efficient, and is repeatedly used, and the construction efficiency is greatly improved.

The present application belongs to the technical field of tunnel construction, in particular to a combined slagging-off device and method for super-large and super-deep vertical shafts. After the rock is broken by the cutter head during tunneling, the rock slag is suspended by injecting bentonite mud slurry at the cutter head position. The mud slurry and rock slag are separated at the mud-water separation station of the mud-water treatment platform of the vertical tunneling machine. The separated rock slag is lifted to the ground by a bucket. The mud slurry is returned to the cutter head position through the mud return pipeline for repeated use. The excess mud slurry is discharged to the ground mud pool for subsequent use. This method is effective for super-large and super-deep vertical shafts using tunneling machine equipment for slagging-off. Conventional methods such as air-lift reverse circulation, vertical belt conveyor, and mud slurry pump slagging-off cannot be used for super-large and super-deep vertical shafts due to limitations such as mud slurry level, vertical transportation distance, and environmental protection. The above conditions are solved, which can greatly improve the overall construction efficiency and realize continuous operation.

The invention discloses a vertical shaft enclosure structure for a shield to obliquely penetrate through a subway bottom and a construction method of the vertical shaft enclosure structure for the shield to obliquely penetrate through the subway bottom, the vertical shaft, the enclosure structure and a retaining wall are constructed on one side of an existing enclosure structure of an operating subway, and the depth of the vertical shaft is flush with the bottom of the existing enclosure structure. The vertical shaft is used for carrying out cut-off construction on the existing enclosure structure of the shield obliquely penetrating through the subway bottom; the vertical shaft structure is arranged on the outer side of the existing building envelope of the station, foundation pit supporting systems such as a vertical shaft supporting structure, a waterproof curtain and a support are additionally arranged, the existing building envelope is utilized, the occupied space is small, the traffic relief difficulty is small, and the influence on ground traffic is small; according to the vertical shaft structure, the existing enclosure structure can be broken firstly and then shield tunneling can pass through, vibration and deformation of an existing station caused by shield pile grinding are reduced, and station structure safety and operation safety are guaranteed.

The invention discloses an adjustable temporary supporting frame, and relates to the technical field of vertical shaft supporting. According to the adjustable temporary supporting frame, only one end of a steel frame is provided with a steel plate and a steel block, and the other end of the steel frame is provided with a mounting circular groove; the end with the steel plate and the steel block is spliced with the end, without the steel plate and the steel block, of the other steel frame, and the angle of the steel frame can be adjusted by randomly changing the angle of the steel block in the mounting circular groove so that the steel frame can be attached to the inner wall of the vertical shaft. The multiple limiting columns move upwards to the two sides of the steel plate to fix the position of the steel plate, so that the angle of the steel plate is not automatically changed after being adjusted, the multiple steel frames are installed on the inner wall of the vertical shaft in a spliced mode and attached to the inner wall of the vertical shaft, and the steel structure performance of the steel frames can temporarily support the inner wall of the vertical shaft; compared with an existing adjustable temporary supporting frame, the adjustable temporary supporting frame has the advantage that the angle of the I-shaped steel frame can be adjusted in a self-adaptive mode according to the radian of the inner wall of the vertical shaft.

The utility model relates to the technical field of gold mine mining safety protection, in particular to a gold mine raise safety isolation device. Comprising a frame, an anchor net, a ladder, an isolation protective net and a plurality of sets of connecting assemblies, the anchor net is located above the frame, the isolation protective net is located above the frame, each connecting assembly comprises a fixing sleeve, an inserting rod, a movable rod, a pull block, a fixing block and a limiting spring, the fixing sleeves are fixedly connected with the frame, and the inserting rods are fixedly connected with the isolation protective net; the inserting rods are arranged in the inserting holes and located on the outer side wall of the isolation protective net, the inserting rods are matched with the inserting holes, the movable rods are in sliding connection with the fixing sleeves, the pull blocks are fixedly connected with one ends of the movable rods, the fixing blocks are fixedly connected with the other ends of the movable rods, and the two ends of the limiting springs are fixedly connected with the fixing blocks and the fixing sleeves respectively. The isolation net can be conveniently installed on the platform without special tools, manpower and time are greatly reduced, follow-up disassembly and recombination are convenient, and use is convenient.

The utility model relates to a mine wellhead protection device which comprises a base, one ends of fixing rods are fixed to the two sides of the interior of the base respectively, an electric telescopic cylinder is fixed to the other ends of the fixing rods, a movable column is connected to the top of the electric telescopic cylinder, the top of the movable column penetrates through a protection cover body to be fixedly provided with a fixing disc, and the protection cover body is installed at the bottom of the fixing disc. According to the mine wellhead protection device, the periphery of a mine wellhead can be protected through the base and the protection cover body, and when the mine wellhead needs to be sealed, the electric telescopic cylinder can be directly used for driving the fixing disc and the protection cover body to move downwards to completely cover the position of the mine wellhead. According to the device, sealing of the position of a mine wellhead is achieved, cold air is prevented from being injected into a mine from the position of the mine wellhead, when open type protection needs to be carried out, the electric telescopic cylinder can be directly used for driving the fixing disc and the protective cover body to ascend, and therefore open type and sealed type protection adjustment of the device is achieved.

This invention belongs to the field of vertical tunneling machine technology, specifically a vertical tunneling machine advanced support frame, including a support frame; the support frames are arranged in pairs; multiple sets of connecting rods are fixed between the pair of support frames; by utilizing the blocking effect of the support frames, connecting rods, and telescopic fences, the bottom of the shaft can be supported around the shaft, maintaining the pressure around the soil layer when water is extracted, reducing the possibility of collapse. Simultaneously, with the help of movable positioning blocks, these blocks can enter the support frame and, through the filtering effect of the filter screen, compress impurities present at the bottom of the shaft, causing debris to accumulate at the bottom of the support frame. This reduces the movement of mud and sand at the bottom of the shaft with the pumping equipment during water extraction, preventing voids at the bottom and soil collapse. Furthermore, the filter screen also acts as a filter during pumping, reducing the amount of debris entering the pumping pipe, preventing blockages, and ensuring efficient pumping.

The utility model discloses an underground gravity energy storage shaft and chamber spatial arrangement structure. The underground gravity energy storage shaft and chamber spatial arrangement structure comprises a vertical shaft; a weight block storage chamber group; the weight block storage chamber groups are arranged on the two sides of the vertical shaft with the vertical shaft as the symmetry axis, and the weight block storage chamber group on each side comprises five weight block storage chambers arranged in parallel. The weight block transportation chamber group is used for transporting weight blocks among the weight block storage chambers; the weight block transportation chamber group comprises four parallel weight block transportation chambers, and the weight block transportation chambers are perpendicular to the weight block storage chambers; the head end and the tail end of the weight block transportation chamber group on each side of the vertical shaft are respectively connected with a weight block transportation chamber; and the connecting section chamber is used for connecting the weight block transportation chamber close to the side of the vertical shaft with the vertical shaft. According to the scheme, the difficulty and cost of excavation construction and maintenance of the chamber can be reduced while the requirements for gravity energy storage transportation and storage capacity can be well met.

The utility model discloses a cast iron step installing and positioning device, and belongs to the technical field of building construction. The distance between the left vertical rod and the right vertical rod is adjusted through a telescopic structure; positioning clamping plates are arranged on the left side of the left vertical rod and the right side of the right vertical rod in a staggered manner corresponding to the interlayer spacing of the cast iron steps; in the using state, the left vertical rod and the right vertical rod are adjusted to be located on the inner sides of the cast iron steps on the two sides. And the cast iron step is vertically clamped by the positioning clamping plate. The utility model has the advantages of simple structure, standard operation and concise appearance; multiple groups can be spliced up and down to cope with various well wall heights, so that the step is firm, reliable, safe and attractive; after use; the device is convenient to carry, easy and fast to install, use and operate, and accurate and effective in component positioning.

This utility model discloses a rockburst protection system for vertical shaft construction, including a hoisting device and a protective device, with the protective device installed inside the vertical shaft. The protective device includes a vertically arranged protective cylinder and a protective cover. The protective cylinder is made of metal. At least two guide grooves are provided circumferentially on the inner wall of the protective cylinder, with the guide grooves positioned along the height of the protective cylinder. Both the protective cylinder and the protective cover are cylindrical structures with openings at both ends, with the upper end of the protective cover positioned inside the protective cylinder. At least two sliders are provided circumferentially on the outer wall of the protective cover, with the sliders positioned along the height of the protective cover and their positions matching the guide grooves. The sliders and guide grooves are slidably connected. The output end of the hoisting device is fixedly connected to the protective cylinder, and the bottom of the protective cover is fixed to the working surface inside the vertical shaft. Driven by the hoisting device, the protective cylinder moves up and down relative to the protective cover. This utility model's protection system solves the technical problem of blind spots in existing protective methods.

The invention relates to a continuous jacking device of a jacking pipe, the continuous jacking device is installed in a working well and used for completing continuous jacking construction of the jacking pipe, the continuous jacking device comprises a front jacking module, a rear jacking module, annular jacking iron and telescopic jacking iron, the front jacking module is provided with a fixed end installed in the working well and a movable end connected with the annular jacking iron, and the rear jacking module is provided with a movable end connected with the annular jacking iron. The annular jacking iron acts on the tail end of the jacking pipe to perform first-stage jacking of the jacking pipe; the rear jacking module is provided with a fixed end installed in the working well and a movable end connected with the telescopic jacking iron. Two-stage jacking operation is achieved through cooperation of the front jacking module and the annular jacking iron and cooperation of the rear jacking module and the telescopic jacking iron, switching from first-stage jacking to second-stage jacking is automatically completed through cooperation of the telescopic function of the telescopic jacking iron and an avoiding groove in the annular jacking iron, and natural jacking transition of a jacking pipe can be achieved; uninterrupted pipe jacking construction operation is achieved, and the pipe jacking construction efficiency is greatly improved.

The utility model relates to the technical field of mining, in particular to a mining safety protection device which comprises bottom plates and a main supporting rod and further comprises a first sleeve head, a first protective guard, a second sleeve head, a second protective guard, a fixing base, a ladder assembly, a positioning plate and a pedal. Two ends of the ladder frame are fixedly connected with positioning plates; according to the safety protection ascending channel, modular assembly is adopted, the protection assemblies and the supporting assemblies can be detached, after construction is finished, the assemblies can be detached to be recycled, the safety protection ascending channel can be provided with an independent power source according to needs, and the safety protection ascending channel is convenient to use. And cables of the power supply are all arranged in the main supporting rod and can be used for a long time, the independent power supply can still operate when an accident occurs and a searchlight in a mine hole is out of action, and constructors can quickly find an ascending channel to escape.