CN211205078U - Mining goaf bottom plate deep hole displacement meter - Google Patents

Abstract

The utility model discloses a mining collecting space area bottom plate deep hole displacement meter, it comprises anchor, steering fixing device and protector. The anchoring device consists of an anchor head, a pointed steel sheet and other accessory components, and can anchor the steel wire rope to the specified depth of the bottom plate of the goaf; the steering fixing device converts vertical displacement of the goaf bottom plate into horizontal displacement, so that the test continuity is ensured, and meanwhile, the position of a drilling hole is fixed, and the bottom plate does not deviate when deformed; the protection device comprises a vertical protection pipe, a horizontal protection pipe, a pressure-resistant shell, a protection bolt and a reading box, and aims to protect the steel wire rope from being extruded by surrounding rocks. The utility model discloses change collecting space area bottom plate vertical displacement into horizontal measurement through wire rope and diverting pulley, utilize pillar and other devices to guarantee wire rope safety, simple structure is practical, and application prospect is wide.

Description

Mining goaf bottom plate deep hole displacement meter

Technical Field

The utility model relates to a coal mine monitoring technology field especially relates to a mining collecting space area bottom plate deep hole displacement meter, and it is applicable to the displacement monitoring of collecting space area bottom plate and tunnel, bottom plate.

Background

A goaf is formed by coal seam mining, the rock stratum three-direction stress state is changed, so that the rock stratum of the bottom plate moves to the goaf within a certain range, and the deformation and the damage of the bottom plate are particularly obvious under the condition that the top plate is hard. After the bottom plate of the working surface is raised, a crack is formed at the upper part of the rock stratum, and the crack can be further developed and expanded under the further action of the ground stress. The floor strata has a tendency to continue to bulge during a significant period of time from bottom to top in the direction of the floor stress. Most coal seam floors are confined aquifers within a certain depth range, if the floors are continuously damaged to the aquifers, water guide channels are formed on the floors to induce water inrush of the floors, and safety production of coal mines is seriously threatened.

At present, most coal mining working faces are mined in a gob-side entry retaining mode, in order to ensure the safe production of the working faces, the deformation of a goaf bottom plate after the working faces are stoped needs to be actually measured, the displacement of rock strata at different depths of the bottom plate is observed on site, the deformation damage depth is calculated, and a basis is provided for coal mine water prevention and control. At present, detection holes are drilled in two grooves of a working surface, and different instruments are used for detecting the damage depth and the deformation characteristic of a bottom plate, but the method has many defects. Firstly, the length of a coal face is generally more than 100m, two gate grooves are positioned at the edge of the face, the center of the face is the position with the maximum deformation, and the deformation characteristics of a central bottom plate of the face cannot be detected by monitoring holes punched in the two gate grooves; in addition, after the working face is pushed and mined, the bottom plate is deformed and damaged, so that the inclined detection hole is easy to collapse, the test cannot be continuously carried out, and the data consistency cannot be ensured; and finally, drilling an inclined drilling hole with a certain angle along the working face to penetrate into a bottom plate of the working face, embedding a displacement sensor and a measuring wire in the inclined drilling hole, wherein the drilling hole is obliquely crossed with the rock stratum, so that the rock stratum interface is easy to crush and deform, the deformation quantity of the monitoring depth is caused by crushing and extruding the measuring wire at a plurality of layers, and the test result is inaccurate.

In addition, present observation equipment also has some defects, and observation equipment and the instrument that contains the circuit rely on cable transmission electric energy and monitoring signal, and the working face bottom plate is downthehole to have water mostly, and equipment is for a long time under the soaking and the erosion action of water, and life cycle is shorter, even accomplish equipment waterproof, also can't avoid the cable conductor to stagger in the drilling and lead to the electric wire short circuit to can't accomplish long-term observation task. In the process of mounting the ordinary displacement meter fluke to the monitoring depth, the steel wire or the steel sheet of the fluke is in long-distance contact and friction with the drilled rock wall due to the fact that the inclined drilling depth is large, so that the steel wire or the steel sheet cannot prop open the anchored rock wall, and anchoring failure is caused. The fluke with partial mechanical structure has a complex internal structure, needs to rotate in a drill hole by using a special mounting rod, is very inconvenient to mount and has poor anchoring effect. The goaf roof rock collapse falls behind and impacts equipment buried in a drill hole and a hole opening, and most of the existing equipment is not provided with a protection device at the hole opening of a monitoring hole, so that the safety of a testing instrument after the goaf roof collapse cannot be guaranteed, and once the instrument is damaged by impact, the goaf roof rock collapse cannot be repaired and replaced by personnel. Most displacement measuring device orifices are not restrained and fixed, and when the displacement is large, the device and the orifices are easy to separate, so that the test is invalid.

Therefore, how to monitor the displacement of the bottom plate of the working face of the mining area is a difficult problem to be solved urgently at present.

Before the invention, a patent with the patent number of 2007100529265 provides a mechanical multipoint displacement meter, which comprises an orifice reading meter, an orifice reference plate, an indium steel wire and an in-hole measuring point anchoring head, wherein the in-hole measuring point anchoring head is anchored by a spring, the structure is complex, the orifice reading meter is fixed on the orifice reference plate, no protective measures are provided, the orifice reading meter is not suitable for monitoring the deformation of surrounding rocks of a bottom plate of a gob, and when a top plate of the gob falls behind, personnel cannot read the orifice reading meter.

The invention with the patent number of 2012105325532 provides a multi-layer telescopic multi-point displacement meter anchor head for a water-rich weak stratum, wherein a plurality of in-hole measuring point anchor head units are longitudinally and sequentially arranged, three triangular blade type anchor flukes are folded, and the anchor flukes are contracted at the moment and can be conveniently placed into a drill hole.

The invention with the patent number of 2014101667845 provides a method for installing a multipoint displacement meter of a steeply inclined coal seam roadway and automatically acquiring data, which can measure the displacement of surrounding rocks of the steeply inclined coal seam roadway, and uses an automatic data acquisition device, wherein a data line of each displacement sensor leads to one arranged data acquisition device.

Disclosure of Invention

To the difficult problem, the utility model provides a mining collecting space area bottom plate deep hole displacement meter to solve the unable monitoring of collecting space area bottom plate and the inaccurate, discontinuous difficult problem of monitoring data.

The utility model relates to a mining goaf bottom plate deep hole displacement meter, which comprises an anchoring device, a steering fixing device and a protective device, wherein the anchoring device comprises an anchor head, a pointed steel sheet, a steel sheet fixing screw, a steel sheet relaxation screw, a steel wire rope fixing block, a steel wire rope fixing hole and a steel wire rope perforation; the steering fixing device comprises a fixing disc, a fixing anchor rod, a fixing nut, a steering pulley, a protective bolt hole and a steel wire rope; the protection device comprises a vertical protection pipe, a horizontal protection pipe, a pressure-resistant shell, a protection bolt and a reading box.

The anchor head be cylindric anchor head that the stainless steel made, external diameter 50~65mm, wall thickness 2~4mm, height 40~50mm, the anchor head is the carrier of fixed tip steel sheet and wire rope, the anchor head lateral wall is equipped with eight steel sheet fixed screw holes and four steel sheet relaxation screw holes of symmetrical arrangement along the center, the anchor head lateral wall has a wire rope to perforate, hole diameter 3~6mm, be located between two steel sheet relaxation screw holes, the anchor head is inside to be hollow structure, can pass a plurality of wire ropes, thereby measure the different degree of depth deflection of same test hole.

The pointed steel sheet is a thin-walled steel sheet made of high-elasticity stainless steel, is large in elasticity, is 0.4-0.5 mm thick and is in a strip shape, two round holes are formed in the lower portion of the pointed steel sheet and are used for installing steel sheet fixing screws, after the pointed steel sheet is fixed to the anchor head, the opening degree of the pointed steel sheet is controlled by the steel sheet relaxation screws, and the pointed steel sheet is propped open to contact with a rock wall of a drilled hole to provide anchoring force.

The steel sheet fixed screw be stainless steel microgroove screw, length 8mm ~10mm, the effect is fixed the tip steel sheet in anchor head outside limit, every tip steel sheet needs two steel sheet fixed screw to be fixed, prevents that the tip steel sheet from taking place to rotate in installation and use, leads to unable anchor power that provides.

The steel sheet relaxation screw is a stainless steel fine-grained screw and is positioned on the upper part of the inner side of the anchor head, the length of the stainless steel fine-grained screw is 10 mm-12 mm, the steel sheet relaxation screw has the function of expanding the upper part of the pointed steel sheet, so that the pointed steel sheet and the anchor head are expanded by a certain angle, the expanded size of the pointed steel sheet is larger than the diameter of a drilled hole, and after the anchoring device is placed into the drilled hole, the pointed steel sheet is contacted with the rock wall of the drilled hole to provide; the length of the steel sheet relaxation screw hole is screwed by the steel sheet relaxation screw, and the opening degree of the pointed steel sheet is determined.

The steel wire rope fixing screw is a screw on the inner side of the steel wire rope fixing block and used for fixing the steel wire rope, and the steel wire rope can be extruded and fixed in the steel wire rope fixing hole after the steel wire rope fixing screw is screwed inwards, so that the steel wire rope cannot be separated.

The wire rope fixing block is a stainless steel arc block welded on the inner side of the anchor head, an opening is formed in the upper portion of the wire rope fixing block and is a wire rope fixing hole, a wire rope fixing screw is arranged on the other side of the wire rope fixing block, the wire rope fixing screw is orthogonal to the wire rope fixing hole, when the wire rope fixing screw is screwed down, the wire rope can be extruded into the wire rope fixing hole, and the wire rope fixing block are connected into a whole.

The steel wire rope fixing hole is a round hole for fixing a steel wire rope, is located on the upper portion of the steel wire rope fixing block, is 4 mm-6 mm in diameter and 15 mm-20 mm in depth, and is orthogonal to a wire rope fixing screw.

The steel wire rope perforation is a round hole in the upper portion of the anchor head, the diameter of the hole ranges from 6mm to 8mm, the hole is located between the two steel sheet relaxation screws, and the steel wire rope penetrates the hole.

The fixed disk be the square steel sheet of stainless steel that the middle part was opened there is the round hole, size 30cm ~40cm, the round hole has the internal thread, fixed disk thickness 12mm ~18mm, the round hole diameter 50mm ~60mm in the middle of the square steel sheet, the fixed disk has three protection bolt hole, protection bolt hole diameter 18mm ~22 mm.

The fixed anchor rod is a common mine anchor rod, has the diameter of 18-22 mm and the length of 1.3-1.5 m, and is anchored in the hole by using a resin anchoring agent.

The fixing nut is a nut for fixing the anchor rod, and the fixing disc can be fixed on the roadway bottom plate after being screwed down.

The steering pulley is a pulley positioned in the middle of the fixed disc, two sides of the fixed disc are fixed by stainless steel plates, a rotating shaft penetrates through the steering pulley in the middle of the steel plates, the steering pulley is a round wheel made of polytetrafluoroethylene, the friction resistance is extremely low, a steel wire rope is steered by the steering pulley to equivalently convert the vertical displacement into the horizontal displacement, and the displacement of the steel wire rope in the reading box is the displacement of the position where the anchoring device is installed, so that the vertical displacement of the bottom plate of the goaf is monitored.

The protection bolt hole is a round hole located on the side edge of the fixed disc, threads are arranged in the protection bolt hole and used for fixing the compression-resistant shell, and external threads of the protection bolt are meshed with the threads in the protection bolt hole.

The steel wire rope is a measuring wire for transmitting displacement and is formed by weaving stainless steel thin steel wires, the rope body is soft, has toughness and high strength, the elastic deformation is extremely small, one end of the steel wire rope is connected with the anchor head, the other end of the steel wire rope is connected with the reading box, and the movement amount of the steel wire rope is the displacement amount at the position where the anchoring device is installed.

Vertical protective tube be the steel pipe of external diameter 50mm ~60mm, wall thickness 3mm ~4mm, length 0.8m ~1m, vertical protective tube upper portion has the screw thread can interlock mutually with the internal thread of fixed disk, there is the internal thread vertical protective tube lower part, different vertical protective tubes can be connected through the screw thread end to end, according to the length decision number of connecting of drilling, wire rope in the drilling passes from vertical protective tube.

The horizontal protective pipe is a steel pipe with the outer diameter of 40 mm-50 mm and the wall thickness of 5 mm-8 mm, the length is 1.8 m-2 m, the left end of the horizontal protective pipe is an internal thread, the right end of the horizontal protective pipe is an external thread, the horizontal protective pipe is connected with the fixed disk in a welding mode, the two horizontal protective pipes are connected through the threads, the distance from an installation point to a crossheading is buried according to a contact roadway, the length of the horizontal protective pipe is determined, the right end of the horizontal protective pipe is connected with the reading box, a steel wire rope passes through a steering pulley and passes through the horizontal protective pipe, the steel wire rope finally reaches the reading box, the reading box is lengthened section by section through the horizontal protective pipe, the reading box is arranged outside the goa.

Resistance to compression shell for the square shell that thick wall stainless steel made, thickness 20mm ~25mm, trilateral circular port that is equipped with can supply protective bolt to pass, fix it to the fixed disk on, provide the protection to inside wire rope and diverting pulley, when the upper portion caving waste rock, the waste rock strikes resistance to compression shell, can not cause the harm to resistance to compression shell internals.

The protective bolt is a stainless steel high-strength bolt, is provided with external threads, and can be meshed with the protective bolt hole to fix the pressure-resistant shell on the fixed disc.

The reading box is a reading and calibrating device, the inside of the reading box is provided with scale marks and a constant force spring, each steel wire rope is guaranteed to be subjected to the same force, the elastic deformation error of the steel wire rope can be eliminated under the condition of the same force, meanwhile, the base point is protected in the reading box, and the displacement of each steel wire rope is the displacement of the goaf bottom plate corresponding to different embedding depths.

The utility model relates to a mining collecting space area bottom plate deep hole displacement meter's application method specifically includes following step:

(1) digging a rectangular mounting groove on a bottom plate in the middle of two crossheading connecting roadways in front of a coal mining working face, digging a burying ditch from the mounting groove to extend to a working face track crossheading, wherein the length of the burying ditch is half of that of the connecting roadway;

(2) vertically drilling a test drilling hole towards the bottom plate in the center of the mounting groove, drilling four rod holes around the test drilling hole, cutting out a steel wire rope with enough length to enable one end of the steel wire rope to penetrate through the steel wire rope through hole, and fixing the steel wire rope into the steel wire rope fixing hole by using a steel wire rope fixing screw;

(3) installing a pointed steel sheet at the outer side of an anchor head, adjusting the length of a steel sheet relaxation screw to enable the upper part of the pointed steel sheet to be opened, wherein the opening size is larger than the diameter of a test drill hole, using an installation rod to drive a steel wire rope to be sent into the drill hole to a specified depth, tensioning the steel wire rope upwards, enabling the anchor head to rotate in the drill hole, simultaneously anchoring the hole wall by the pointed steel sheet, and then pulling out the installation rod from the hole;

(4) the steel wire rope penetrates through vertical protective pipes which are sequentially connected through threads, the vertical protective pipes are placed in the drill hole to protect the steel wire rope in the vertical protective pipes, and the connecting length of the protective pipes is obtained by subtracting 1.5 m-2 m from the installation depth of the anchor head;

(5) the steel wire rope passes through the central round hole of the fixed disk, the upper part of the next protective pipe is connected with the internal thread of the central round hole of the fixed disk, so that a plurality of protective pipes and the fixed disk are integrated, the steel wire rope passes through the horizontal protective pipe by bypassing the steering pulley,

(6) placing a fixed disc in the mounting groove, anchoring the fixed disc in the mounting groove by using a fixed anchor rod, a fixed nut and an anchoring agent, fixing a pressure-resistant shell on the fixed disc through a protective bolt, sequentially penetrating a steel wire rope through a plurality of horizontal protective pipes connected end to end in the embedding ditch, and finally achieving the purpose of rail crossheading;

(7) be connected reading box and last horizontal protective tube, wear out and fix wire rope in the reading box from horizontal protective tube, mark wire rope length, use cinder and garrulous waste rock with the mounting groove with bury the ditch fill level underground, will the utility model relates to a mining collecting space area bottom plate deep hole displacement meter is located the working face below, treats that the working face pushes away and adopts the back and regularly carries out the reading.

The utility model has the advantages that:

(1) the components of the utility model are made of waterproof and corrosion-resistant materials, which can prevent the erosion of the water of the coal seam floor and other media and ensure the stability of long-term work;

(2) the utility model uses the mechanical structure to transmit the displacement, the structure is simple, the test is accurate, and the cost is low;

(3) the utility model creatively uses the diverting pulley to convert the deformation amount of the bottom plate of the goaf into the horizontal deformation amount, and arranges the reading device outside the goaf, thereby ensuring the safety of testing personnel and the continuity of testing data;

(4) the utility model discloses be equipped with horizontal protective tube and protective housing to bury underground in the contact bottom plate in front of the working face, and dig the slot at the bottom plate and protect, it is less to the equipment impact after working face coal mining equipment passes through and the working face roof collapses, makes it can normally work, the utility model discloses vertical protective tube can guarantee that the test drilling pore wall is complete, prevents to cause the test error by the hole of collapsing;

(5) the utility model discloses use fixed stock with the fixed disk anchor in the country rock in test drilling drill way, in time take place great deformation also can not squint, guaranteed the accuracy of test result.

Drawings

Fig. 1 is the utility model relates to a mining collecting space area bottom plate deep hole displacement meter structure picture.

Fig. 2 is the utility model relates to an anchor elevation of mining collecting space area bottom plate deep hole displacement meter.

Fig. 3 is the utility model relates to an anchor of mining collecting space area bottom plate deep hole displacement meter three-dimensional map.

Fig. 4 is the utility model relates to a mining collecting space area bottom plate deep hole displacement meter turn to fixing device three-dimensional map.

Fig. 5 is the utility model relates to a mining collecting space area bottom plate deep hole displacement meter turns to fixing device top view.

Fig. 6 is the utility model relates to a three-dimensional drawing of protector of mining collecting space area bottom plate deep hole displacement meter.

Fig. 7 is the utility model relates to a mining collecting space area bottom plate deep hole displacement meter mounted position plane sketch map.

Fig. 8 is the utility model relates to a mining collecting space area bottom plate deep hole displacement meter mounted position section sketch map.

Illustration of the drawings: 1-anchoring device anchor head; 11-anchor head; 12-pointed steel sheet; 13-fixing screws on steel plates; 14-steel sheet relaxation screw; 15-steel wire rope fixing screw; 16-a steel wire rope fixing block; 17-steel wire rope fixing holes; 18, perforating a steel wire rope; 2-steering fixing device; 21-fixing the disc; 22-fixing the anchor rod; 23-fixing the nut; 24-a diverting pulley; 25-protective bolt holes; 26-a steel wire rope; 3-a protective device; 31-a vertical protective tube; 32-horizontal protective tube; 33-a pressure resistant housing; 34-a guard bolt; 35-reading box; 41 a communication lane; 42 mounting grooves; 43 burying a ditch; 44, the track is crosscut; 45, testing drilling holes; 46 anchor rod holes; and 47 mining direction.

Detailed Description

The utility model provides a mining collecting space area bottom plate deep hole displacement meter, for making the utility model discloses a purpose, technical scheme and effect are clearer, clear and definite, and it is right to combine the drawing below the utility model discloses a detailed description is carried out to the embodiment.

As shown in figures 1-6, the utility model relates to a mining goaf bottom plate deep hole displacement meter comprises anchor 1, turn to fixing device 2 and protector 3. The anchoring device 1 comprises an anchor head 11, a pointed steel sheet 12, a steel sheet fixing screw 13, a steel sheet relaxation screw 14, a steel wire rope fixing screw 15, a steel wire rope fixing block 16, a steel wire rope fixing hole 17 and a steel wire rope perforation 18; the steering fixing device 2 comprises a fixing disc 21, a fixing anchor rod 22, a fixing nut 23, a steering pulley 24, a protective bolt hole 25 and a steel wire rope 26; the guard 3 comprises a vertical guard tube 31, a horizontal guard tube 32, a pressure resistant housing 33, a guard bolt 34 and a reading box 35.

Further, anchor head 11 is cylindric anchor head that stainless steel made, external diameter 50mm ~65mm, wall thickness 2mm ~4mm, height 40mm ~50mm, anchor head 11 is the carrier of fixed tip steel sheet 12 and wire rope 26, anchor head 11 lateral wall is equipped with eight steel sheet fixed screw holes and four steel sheet relaxation screw holes of symmetrical arrangement along the center, anchor head 11 lateral wall has a wire rope to perforate, hole diameter 3~6mm, be located between two steel sheet relaxation screw holes, anchor head 11 is inside to be hollow structure, can pass a plurality of different degree of depth wire ropes 26, thereby measure same test hole deflection.

Furthermore, the pointed steel sheet 12 is a thin-walled steel sheet made of high-elasticity stainless steel, is large in elasticity, is 0.4 mm-0.5 mm thick and is in a strip shape, two round holes are formed in the lower portion of the pointed steel sheet 12 and are used for installing steel sheet fixing screws 13, and after the pointed steel sheet 12 is fixed to the anchor head 11, the opening degree of the pointed steel sheet 12 is controlled by steel sheet relaxation screws 14 to provide anchoring force.

Further, steel sheet fixed screw 13 is stainless steel microgroove screw, and length 8mm ~10mm is used for fixing tip steel sheet 12 in anchor head 11 outside limit, and every tip steel sheet 12 needs two steel sheet fixed screws 13 to be fixed, prevents that tip steel sheet 12 from taking place to rotate in installation and use, leads to unable anchor power that provides.

Further, the steel sheet relaxation screw 14 is a stainless steel fine-grained screw, is located at the upper portion of the inner side of the anchor head 11, is 10 mm-12 mm long, and is used for expanding the upper portion of the pointed steel sheet 12 to enable the pointed steel sheet 12 and the anchor head 11 to be expanded at a certain angle, so that the expanded size of the pointed steel sheet 12 is larger than the diameter of a drilled hole, and after the anchoring device 1 is placed into the drilled hole, supporting force is provided by means of contact of the pointed steel sheet 12 and the rock wall of the drilled hole; the length of the steel sheet relaxation screw 14 screwed into the steel sheet relaxation screw hole determines the opening degree of the pointed steel sheet 12.

Further, the wire rope fixing screw 15 is a screw on the inner side of the wire rope fixing block 16 and is used for fixing the wire rope 26, and the wire rope 26 can be extruded in the wire rope fixing hole 17 after the wire rope fixing screw 15 is screwed inwards, so that the wire rope cannot be separated.

Further, the wire rope fixing block 16 is a stainless steel arc block welded on the inner side of the anchor head 11, an opening is formed in the upper portion of the wire rope fixing block and is a wire rope fixing hole 17, a wire rope fixing screw 15 is arranged on the other side of the wire rope fixing block, the wire rope fixing screw 15 is orthogonal to the wire rope fixing hole 17, when the wire rope fixing screw 15 is screwed down, the wire rope 26 can be extruded into the wire rope fixing hole 17, and the wire rope 26 and the wire rope fixing block 16 are connected into a whole.

Further, the steel wire rope fixing hole 17 is a round hole for fixing the steel wire rope 26, is located on the upper portion of the steel wire rope fixing block 16, is 4 mm-6 mm in diameter and 15 mm-20 mm in depth, and is orthogonal to the wire rope fixing screw through the steel wire rope fixing hole 17.

Further, the steel wire rope perforation 18 is a circular hole on the upper portion of the anchor head 11, the diameter of the hole is 6 mm-8 mm, the hole is located between the two steel sheet relaxation screws 14, and the steel wire rope 26 penetrates the hole.

Further, the fixed disk 21 is a stainless steel square steel plate with a round hole in the middle, the size of the stainless steel square steel plate is 30 cm-40 cm, the round hole is provided with an internal thread, the thickness of the fixed disk 21 is 12 mm-18 mm, the diameter of the round hole in the middle of the square steel plate is 50-60 mm, the fixed disk 21 is provided with three protection bolt holes 25, and the diameter of the protection bolt holes is 18-22 mm.

Further, the fixed anchor rod 22 is a common mine anchor rod, has the diameter of 18-22 mm and the length of 1.3-1.5 m, and is anchored by using one anchoring agent.

Further, the fixing nut 23 is a nut for fixing the anchor rod 22, and the fixing plate 21 can be fixed on the roadway floor after being screwed down.

Furthermore, the diverting pulley 24 is a pulley positioned in the middle of the fixed disc 21, the two sides of the fixed disc are fixed by stainless steel plates, a rotating shaft penetrates through the diverting pulley 24 in the middle of the steel plates, the diverting pulley 24 is a round wheel made of polytetrafluoroethylene, the frictional resistance is extremely low, the steel wire rope 26 is diverted by the diverting pulley 24, the vertical displacement is equivalently converted into the horizontal displacement, and the steel wire rope displacement in the reading box 35 is the displacement at the position of the installation anchoring device 1, so that the vertical displacement of the bottom plate of the goaf is monitored.

Further, the protection bolt hole 25 is a circular hole located at the side of the fixed disk 21, and is internally provided with threads for fixing the pressure-resistant housing 33, and the external threads of the protection bolt 34 are meshed with the threads in the protection bolt hole 25.

Further, the wire rope 26 is a measuring wire for transmitting displacement, and is formed by weaving stainless steel thin wires, the rope body is soft, has toughness and high strength, has extremely small elastic deformation, one end of the wire rope is connected with the anchor head 11, the other end of the wire rope is connected with the reading box 35, and the movement amount of the wire rope is the displacement amount at the position where the anchoring device 1 is installed.

Further, vertical protective tube 31 is the steel pipe of outer diameter 50mm ~60mm, wall thickness 3mm ~4mm, length 0.8m ~1m, and there is the screw thread on vertical protective tube 31 upper portion can interlock mutually with the internal thread of fixed disk 21, and there is the internal thread vertical protective tube 31 lower part, and different vertical protective tubes 31 can be connected through the screw thread end to end, and the figure of connecting is decided according to the length of drilling, and wire rope 26 in the drilling passes in the vertical protective tube 31.

Further, horizontal protective pipe 32 is the steel pipe of external diameter 40mm ~50mm, wall thickness 5mm ~8mm, length 1.8m ~2m, horizontal protective pipe 32 left end is the internal thread, the right-hand member is the external screw thread, horizontal protective pipe 32 is connected through welding mode with fixed disk 21, connect through the screw thread between two horizontal protective pipe 32, bury the distance of point to the crossheading according to the contact lane, confirm the length of horizontal protective pipe 32, horizontal protective pipe 32 right-hand member is connected with reading box 35, wire rope 26 passes through diverting pulley 24, pass from horizontal protective pipe 32, finally reach reading box 35, connect long through the section by section of horizontal protective pipe 32, place reading box 35 in the goaf outside, thereby guarantee the safety of reading box 35.

Further, resistance to compression shell 33 is the square shell that the thick wall stainless steel made, and thickness 20mm ~25mm, trilateral circular port that is equipped with can supply protective bolt 34 to pass, fixes it to fixed disk 21 on, provides the protection to inside wire rope 26 and diverting pulley 24, and when the upper portion caving waste rock, the waste rock strikes resistance to compression shell 33, can not cause the harm to resistance to compression shell 33 internals.

Further, the protective bolt 34 is a stainless steel high-strength bolt, which has an external thread and can be engaged with the protective bolt hole 25 to fix the pressure-resistant housing 33 on the fixed disk 21.

Furthermore, the reading box 35 is a reading and calibration device, and is internally provided with scale marks and a constant force spring, so that each steel wire rope 26 is ensured to bear the same force, the elastic deformation error of the steel wire rope can be eliminated under the condition of the same force, meanwhile, a base point is protected in the reading box 35, and the displacement of each steel wire rope 26 is the displacement of the goaf bottom plate corresponding to different embedding depths.

It should be noted that, the partial name and the description in fig. 7 and fig. 8 are not the utility model discloses a component structure, but the utility model discloses the position detail of installation, for making the utility model discloses a method of use is more clear and definite, combines accompanying drawings 1~8 to carry out the concrete description, the utility model relates to a method of use of mining collecting space area bottom plate deep hole displacement meter specifically includes following step:

(1) digging a rectangular mounting groove 42 at the bottom plate of the middle part of a connecting roadway 41 of two roadways in front of a coal mining working face, wherein the size of the mounting groove 42 is × long, × wide, 0.4m, × 0.4m, × 0.4.4 m, digging an embedding ditch 43 from the mounting groove 42 and extending to the working face track roadway 44, the size of the embedding ditch is × wide, 0.2m, × 0.4m, and the length of the embedding ditch 43 is half of the length of the connecting roadway;

(2) vertically drilling a test drilling hole to the bottom plate at the center of the mounting groove 42, wherein the depth of the test drilling hole is 30-35 m, the diameter of the test drilling hole is 65-75 mm, four anchor rod holes with the diameter of 25mm and the depth of 1.5-1.6 m are drilled around the test drilling hole, and a steel wire rope 26 with enough length is cut out to enable one end of the steel wire rope to penetrate through the steel wire rope through hole 18 and fixed into the steel wire rope fixing hole 17 by using a steel wire rope fixing screw 15;

(3) installing a pointed steel sheet 12 at the outer side of an anchor head 11, adjusting the length of a steel sheet relaxation screw 14 to ensure that the upper part of the pointed steel sheet 12 is opened, wherein the opening size is larger than the diameter of a drilled hole, using an installation rod to drive a steel wire rope 2 to be sent into the drilled hole by the anchor head 11 to a specified depth, tensioning the steel wire rope 26 upwards, rotating the anchor head 11 in the drilled hole, simultaneously anchoring the hole wall by the pointed steel sheet 12, and then pulling out the installation rod from the hole;

(4) the steel wire rope 26 penetrates through vertical protective pipes 31 which are sequentially connected through threads, the vertical protective pipes 31 are placed in the drill hole to protect the steel wire rope of the vertical protective pipes 31, and the installation depth of the anchor head 11 minus 1.5 m-2 m is the connection length of the protective pipes 31;

(5) the steel wire rope 26 penetrates through a central circular hole of the fixed disc 21, the upper part of the vertical protective pipe 31 above the last part is connected with the internal thread of the central circular hole of the fixed disc 21, so that the protective pipes 31 and the fixed disc 21 are integrated, and the steel wire rope 26 passes through the horizontal protective pipe 32 by bypassing the steering pulley 24;

(6) placing the fixed disc 21 in the installation groove, anchoring the fixed disc 21 in the installation groove by using a fixed anchor rod 22, a fixed nut 23 and an anchoring agent, fixing a pressure-resistant shell 33 on the fixed disc 21 through a protective bolt 34, sequentially penetrating a steel wire rope 26 through a plurality of horizontal protective pipes 32 connected end to end in the embedding ditch, and finally achieving the purpose of rail crossheading;

(7) be connected reading box 35 and last horizontal protective tube 32, wear out and fix wire rope in reading box 35 from horizontal protective tube 32, demarcate wire rope length, use cinder and garrulous waste rock with the mounting groove with bury the ditch fill and level underground, the working face pushes out the back of mining, waste rock 49 fall, the utility model discloses arrange collecting space area bottom plate 48 in, will the utility model relates to a mining collecting space area bottom plate deep hole displacement meter is located the working face below, treats that the working face pushes out and adopts the back and regularly carries out the reading.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (1)

1. A mining goaf bottom plate deep hole displacement meter is characterized by comprising an anchoring device, a steering fixing device and a protection device, wherein the anchoring device comprises an anchor head, a pointed steel sheet, a steel sheet fixing screw, a steel sheet relaxation screw, a steel wire rope fixing block, a steel wire rope fixing hole and a steel wire rope perforation; the inside of the anchor head is of a hollow structure and can penetrate through a plurality of steel wire ropes, two round holes are formed in the lower portion of the pointed steel sheet and used for mounting steel sheet fixing screws, the pointed steel sheet is fixed on the outer side edge of the anchor head through the fixing screws, the steel wire rope fixing screws are screws on the inner side of steel wire rope fixing blocks and used for fixing the steel wire ropes, the steel wire rope fixing blocks are welded on the inner side of the anchor head, steel wire rope fixing holes are formed in the upper portion of the steel wire rope fixing blocks; the steering fixing device comprises a fixing disc, a fixing anchor rod, a fixing nut, a steering pulley, a protective bolt hole and a steel wire rope; the fixed disc is a stainless steel square steel plate with a round hole in the middle, the steering pulley is a pulley positioned in the middle of the fixed disc, the stainless steel plates are fixed on two sides of the fixed disc, a rotating shaft penetrates through the steering pulley in the middle of the steel plate, the protective bolt hole is a round hole positioned on the side edge of the fixed disc, one end of a steel wire rope is connected with the anchor head, and the other end of the steel wire rope is connected with the reading box; the protective device comprises a vertical protective pipe, a horizontal protective pipe, a pressure-resistant shell, a protective bolt and a reading box; vertical protective tube upper portion has the screw thread can with the internal thread interlock of fixed disk mutually, and horizontal protective tube passes through welded mode with the fixed disk to be connected, and horizontal protective tube right-hand member is connected with the reading box, and wire rope passes in the horizontal protective tube through diverting pulley, and trilateral circular port that is equipped with of resistance to compression shell can supply protecting bolt to pass, fixes it to the fixed disk on.

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