阅读说明：本技术 一种防护式工作面的回撤装置及其使用方法 (Retracting device of protective working surface and using method thereof ) 是由 曾福海 胡丽娥 于 2019-09-26 设计创作，主要内容包括：本发明公开了一种防护式工作面的回撤装置及其使用方法,包括底座,所述底座下方安装有四滚轮,所述四滚轮前侧均安装有底座支撑装置,所述底座支撑装置包括支撑架和限位器,所述底座两侧安装有两起重支柱,所述两起重支柱上方通过焊接连接拱形承重梁板,所述拱形承重梁板下方安装有横向伸缩液压杆,所述拱形承重梁板下方安装有应急防护装置,所述底座前端安装有机械手臂,包括机械手左臂和机械手右臂,所述机械手左臂和机械手右臂安装于所述底座左侧和右侧,本发明提供的一种防护式工作面的回撤装置,提供一种更高效、更实用的综采回撤装置,可以直接一次抽出液压支架,替代了工作面回撤期间的单体支柱人工支护,同时保证了支护强度。(The invention discloses a withdrawing device of a protective working surface and a use method thereof, and the withdrawing device comprises a base, wherein four rollers are arranged below the base, base supporting devices are respectively arranged at the front sides of the four rollers, each base supporting device comprises a supporting frame and a limiting stopper, two lifting support columns are arranged at two sides of the base, an arch-shaped bearing beam plate is connected above the two lifting support columns through welding, a transverse telescopic hydraulic rod is arranged below the arch-shaped bearing beam plate, an emergency protective device is arranged below the arch-shaped bearing beam plate, a mechanical arm is arranged at the front end of the base and comprises a mechanical arm left arm and a mechanical arm right arm, the mechanical arm left arm and the mechanical arm right arm are arranged at the left side and the right side of the base, the withdrawing device of the protective working surface provided by the invention provides a more efficient and practical fully-mechanized withdrawing device, and can directly withdraw the hydraulic support at one time, the manual support of the single prop during the withdrawal of the working face is replaced, and the support strength is ensured.)

1. A retracting device of a protective working surface is characterized by comprising a base, four rollers are installed below the base, base supporting devices are installed on the front sides of the four rollers respectively, each base supporting device comprises a supporting frame and a limiting stopper, two lifting pillars are installed on two sides of the base, arch-shaped bearing beam plates are connected above the two lifting pillars through welding, transverse telescopic hydraulic rods are installed below the arch-shaped bearing beam plates, emergency protective devices are installed between the arch-shaped bearing beam plates and the two lifting pillars and are tightly attached to two sides and the upper side of each arch-shaped bearing beam plate through single-component polyurethane adhesives, first-aid boxes are installed on the base below the arch-shaped bearing beam plates, concrete pump pipes are installed at the rear ends of the arch-shaped bearing beam plates, mechanical arms are installed at the front ends of the base and comprise a left manipulator arm and a right manipulator arm, the manipulator left arm install in the base left side, the manipulator right arm install in the base right side, the manipulator left arm with the installation of manipulator right side arm top is all installed and is supported the diaphragm, install dust removal sprinkler between two jack-up pillars.

2. The retracting device of a protective working surface according to claim 1, wherein the emergency protective device comprises soft contact plastic, an oxygen mask, an oxygen hose and an oxygen bag, the soft contact plastic is hollow plastic, the soft contact plastic and the arched bearing beam plate are adhesively mounted through a one-component polyurethane adhesive, the oxygen bag is mounted inside the soft contact plastic, the oxygen mask is connected with the oxygen bag through the oxygen hose, and the number of the oxygen masks is 3-5.

3. A retracting device of a guarded working surface according to claim 1, wherein the transverse telescopic hydraulic rod is provided with a limiting device, the limiting device comprises a front limiting device and a rear limiting device, and the distance between the front limiting device and the rear limiting device is 3-5 cm.

4. The retracting device of the protected working surface as claimed in claim 1, wherein the supporting frame comprises a hydraulic rod and a supporting plate, the stopper is mounted on the hydraulic rod, the telescopic distance of the hydraulic rod is 40-70 cm, the supporting plate is mounted below the hydraulic rod by welding, the supporting plate is square, the thickness of the supporting plate is 5-8 cm, and the area of the supporting plate is 400-900 square cm.

5. The retracting device of the protective working surface according to claim 2, wherein a carbon dioxide tube is installed at the lower end of the oxygen hood, a reverse return plug is installed between the carbon dioxide tube and the oxygen hood, an oxygen tube is installed at the upper end of the oxygen hood, a reverse return plug is installed between the oxygen tube and the oxygen hood, one end of the carbon dioxide tube is connected with an oxygen generation bag, sodium peroxide is installed in the oxygen generation bag, the oxygen generation bag is installed at the bottom in the soft contact plastic, oxygen is generated through the reaction of the sodium peroxide and the carbon dioxide in the carbon dioxide tube, one end of the oxygen generation bag is connected with the oxygen bag through a connecting tube, and the amount of the sodium peroxide in the oxygen generation bag is 2-5 kg.

6. A retracting device for a protective working surface according to claim 2, wherein said oxygen bag is formed into a sheet shape, said oxygen bag is made of silica gel, and said oxygen bag can withstand a pressure of 0.5-0.7 mpa.

7. The retracting device of the guarded working surface as claimed in claim 1, wherein the dust removing and spraying device comprises a spray head and a pressure spray pipe, a rotating cross rod is arranged below the spray head, and the pressure of the pressure spray pipe is in a range of 1.5-2.5 MPa.

8. The retracting device of the protective working surface according to claim 1, wherein the left arm and the right arm of the manipulator comprise a hand grip, a swing arm, a supporting arm and a telescopic arm, the supporting transverse plate is mounted at the upper end of the supporting arm through a bolt, the hand grip is mounted at the front end of the swing arm through a servo motor and a harmonic reducer, the swing arm is mounted at the front end of the supporting arm through a cylindrical ball bearing, the supporting arm is mounted at the front end of the telescopic arm through a cylindrical ball bearing, and the rear end of the telescopic arm is fixed on the base through a bolt.

9. A protective face retraction device and method of use thereof, wherein the coal face retraction device is as claimed in any one of claims 1 to 8, including the steps of:

s1: in the working face withdrawing process, the manipulator left arm and the manipulator right arm are used for withdrawing the hydraulic support, the gripper grasps the hydraulic support and retracts through the retracting arm to withdraw, the gripper transfers the hydraulic support to the base through rotation of the swinging arm, the manipulator left arm and the manipulator right arm work simultaneously to accelerate the withdrawing speed of the hydraulic support, a large amount of dust and coal ash can be generated in the process, and at the moment, the dust removal spraying device enables the spray head to spray water through the pressure spray pipe, so that the dust and coal ash are reduced.

S2, after the hydraulic support is pulled out, the base moves forwards, the arched bearing beam plate props against an upper operation surface through the lifting of the two bearing support columns, at the moment, the concrete pump extracts concrete, injects the concrete between the arched bearing beam plate and the working surface, further injects the concrete through the descending of the two bearing support columns by injecting the concrete for tamping, and injects the concrete with the thickness of 5-10 cm to finish the operation;

s3: in this process, the reduction of horizontal flexible hydraulic stem rear, during the concrete pours into both sides cliff into, when the concrete pours into thick 3-5 centimetres into, stops to pour into, accomplishes the withdrawal work of working face, and then consolidated the safety in operation tunnel, if meet emergency, can carry out emergency refuge at the emergent protector in arch bearing beam slab below, emergent protector mainly provides spacious worker required oxygen, first aid medicine, water food etc. when the emergency appears.

Technical Field

The invention belongs to the field of mineral exploitation, and particularly relates to a protective working face withdrawing device and a use method thereof.

Background

The comprehensive coal mining method of the coal mine greatly improves the coal mining quantity and the recovery rate, the fully mechanized mining equipment must be recycled, and in the process of withdrawing the equipment from the working face, potential safety hazards are caused due to backward withdrawing processes and procedures, particularly in the withdrawing process of a hydraulic support, so that the working efficiency is low, the labor intensity of workers is high, the material waste is high, and the like.

Disclosure of Invention

The invention aims to provide a protective working face withdrawing device and a use method thereof, which aim to solve the problems in the background technology and provide a more efficient and practical fully-mechanized mining withdrawing device, a hydraulic support can be directly drawn out at one time, the manual support of a single support column during the withdrawing of the working face is replaced, and the support strength is ensured.

In order to achieve the purpose, the invention provides the following technical scheme: a retracting device of a protective working surface comprises a base, four idler wheels are installed below the base, base supporting devices are installed on the front sides of the four idler wheels, each base supporting device comprises a supporting frame and a limiting stopper, two lifting pillars are installed on two sides of the base, arch-shaped bearing beam plates are connected above the two lifting pillars through welding, transverse telescopic hydraulic rods are installed below the arch-shaped bearing beam plates, emergency protective devices are installed between the arch-shaped bearing beam plates and the two lifting pillars, the emergency protective devices are installed on two sides and the upper side of each arch-shaped bearing beam plate through single-component polyurethane adhesives, first-aid boxes are installed on the base below the arch-shaped bearing beam plates, concrete pump pipes are installed at the rear ends of the arch-shaped bearing beam plates, and mechanical arms including left arms and right arms of mechanical arms are installed at the front ends of the base, the manipulator left arm install in the base left side, the manipulator right arm install in the base right side, the manipulator left arm with the installation of manipulator right side arm top is all installed and is supported the diaphragm, install dust removal sprinkler between two jack-up pillars. (ii) a When an emergency situation occurs, workers can hide in the protective device under the arched bearing beam plate at once to wait for rescue, the survival rate of collapse of a mine cavity is increased, 3 persons or 4 persons or 5 persons can live in the device for 15-30 days, so that time can be gained for the rescue workers, the retraction operation of a working surface is rapidly completed through the mutual cooperation of all parts, the arched bearing beam plate is used, the pressure of an upper coal mine can be reduced mainly under the bearing pressure, a channel is safer, the operation space is not influenced, when the mechanical arm breaks above a roadway, the upper working surface is supported to prevent accidents, and further later-stage remediation is performed, the mechanical arm can perform emergency treatment and send out alarm warning under the condition, the technical staff can conveniently and rapidly arrive at the accident roadway.

Preferably, the emergency protection device comprises soft contact plastic, an oxygen mask, an oxygen pipe and oxygen bags, wherein the soft contact plastic is hollow plastic, the soft contact plastic and the arched bearing beam plate are bonded and installed through a single-component polyurethane adhesive, the oxygen bags are installed inside the soft contact plastic, the oxygen mask is connected with the oxygen bags through the oxygen pipe, and the number of the oxygen masks is 3-5; prevent after the accident that the personnel from appearing in protector and the equipment between the hard contact, add soft contact plastics and hug closely on arch bearing beam board, can avoid personnel's secondary be injured like this when rocking, and the inside oxygen package that has put the silica gel material of soft contact plastics, provide personnel's breathing through the oxygen package.

Preferably, the transverse telescopic hydraulic rod is provided with a limiting device, the limiting device comprises a front limiting device and a rear limiting device, and the distance between the front limiting device and the rear limiting device is 3-5 cm; when the same both sides cliff bearing, also solidify through the injection of concrete and reach and do not use hydraulic support, just can accomplish the supporting role, practice thrift the hydraulic support pole and use, increase the frequency of utilization of hydraulic stem, it is extravagant to reduce equipment, increases the rate of utilization of equipment.

Preferably, the support frame comprises a hydraulic rod and a support plate, the limiter is mounted on the hydraulic rod, the telescopic distance of the hydraulic rod is 40-70 cm, the support plate is mounted below the hydraulic rod through welding, the support plate is square, the thickness of the support plate is 5-8 cm, and the area of the support plate is 400-900 square cm; the retracting device can be supported by the hydraulic rod and the supporting plate to prepare for the forward movement of the guide rail, in the supporting process, as the hard ground and the loose ground exist in the soil in the mine, the supporting plate is added to prevent the hydraulic rod from sinking into the ground in the supporting process, and bears the gravity of the whole retracting device, the thickness of the supporting plate is set to be 5-8 cm according to the gravity of the retracting device, and the area of the supporting plate is 400 plus 900 square centimeters.

Preferably, a carbon dioxide pipe is installed at the lower end of the oxygen hood, a reverse return plug is installed between the carbon dioxide pipe and the oxygen hood, an oxygen pipe is installed at the upper end of the oxygen hood, a reverse return plug is installed between the oxygen pipe and the oxygen hood, one end of the carbon dioxide pipe is connected with an oxygen generation bag, sodium peroxide is installed in the oxygen generation bag, the oxygen generation bag is installed at the bottom in the soft contact plastic, oxygen is generated through the reaction of the sodium peroxide and the carbon dioxide in the carbon dioxide pipe, one end of the oxygen generation bag is connected with the oxygen bag through a connecting pipe, and the amount of the sodium peroxide in the oxygen generation bag is 2-5 kg; the carbon dioxide pipe of installation can carry the oxygen bag with the carbon dioxide gas of personnel's exhalation in the oxygen mask, sodium peroxide reaction through carbon dioxide and oxygen bag in generates oxygen, carry in the oxygen bag, reverse back stopper prevents the carbon dioxide of personnel's exhalation and gets into the oxygen pipe when personnel's oxygen uptake, when personnel's oxygen exhalation carbon dioxide, the reverse back stopper of carbon dioxide is opened, carbon dioxide gets into the carbon dioxide pipe, the reverse back stopper prevents the return of carbon dioxide, through personnel's oxygen uptake, the oxygen bag provides oxygen, the carbon dioxide of personnel's exhalation gets into the oxygen bag and prepares oxygen, make personnel's oxygen volume increase, and then increase personnel's survival time.

Preferably, the oxygen bag is in a sheet shape, is made of silica gel and can bear the pressure of 0.5-0.7 MPa; the oxygen bag is made of silica gel, so that the oxygen bag can not be extruded and exploded when the personnel extrude the oxygen bag, the bearing pressure can be 0.5-0.7 MPa, and the silica gel is enough to extrude the personnel or equipment.

Preferably, the dedusting and spraying device comprises a spray head and a pressure spray pipe, wherein a rotary cross rod is arranged below the spray head, and the pressure range of the pressure spray pipe is 1.5-2.5 MPa; in the coal mining surface withdrawing engineering, a large amount of dust and coal ash are generated, so that a large amount of workers get diseases, and the occupational diseases of the workers are caused.

Preferably, the left arm and the right arm of the manipulator comprise a gripper, a swing arm, a support arm and a telescopic arm, the support transverse plate is mounted at the upper end of the support arm through a bolt, the gripper is mounted at the front end of the swing arm through a servo motor and a harmonic reducer, the swing arm is mounted at the front end of the support arm through a cylindrical ball bearing, the support arm is mounted at the front end of the telescopic arm through a cylindrical ball bearing, and the rear end of the telescopic arm is fixed on the base through a bolt; the withdrawing operation of the hydraulic support is completed through the left arm and the right arm of the manipulator, and meanwhile, when the withdrawing device moves automatically, the withdrawing operation is completed through the left arm of the manipulator and the right arm of the manipulator in mutual cooperation, the advancing operation of the two guide rails is completed, the withdrawing operation is continuously performed, and the situation that the hydraulic support cannot advance due to the fact that no guide rail exists in the front is avoided.

Preferably, the use method of the retracting device for the protective working surface comprises the following steps:

s1: in the working surface retracting process, retracting operation of the hydraulic support is carried out through the left manipulator arm and the right manipulator arm, the hydraulic support is grasped through the gripper and retracted through the retracting arm, retracting operation is carried out, the gripper transfers the hydraulic support to the base through rotation of the swinging arm, retracting speed of the hydraulic support is increased through simultaneous work of the left manipulator arm and the right manipulator arm, a large amount of dust and coal ash are generated in the process, and at the moment, the dust removal spraying device enables the spray nozzle to spray water through the pressure spray pipe, so that generation of dust and coal ash is reduced;

s2, after the hydraulic support is pulled out, the base moves forwards, the arched bearing beam plate props against an upper operation surface through the lifting of the two bearing support columns, at the moment, the concrete pump extracts concrete, injects the concrete between the arched bearing beam plate and the working surface, further injects the concrete through the descending of the two bearing support columns by injecting the concrete for tamping, and injects the concrete with the thickness of 5-10 cm to finish the operation;

s3: in this in-process, transversely flexible hydraulic stem rear reduces, and during the concrete pours into both sides cliff into, when concrete pours into thick 3-5 centimetres, stop to pour into, the withdrawal work of completion working face, and then consolidated the safety in operation tunnel, if meet emergency, can carry out emergency refuge at the emergent protector of arch bearing beam board below, emergent protector mainly provides spacious worker required oxygen, first aid medicine, water food etc. when the emergency appears.

Compared with the prior art, the invention has the beneficial effects that: the utility model provides a more efficient, more practical fully mechanized coal mining withdrawing device, can directly once take out hydraulic support, replaced the artifical support of monomer pillar during working face withdrawal, guaranteed the support intensity simultaneously.

Drawings

Fig. 1 is a schematic structural view of a withdrawal device of a coal face of the invention.

FIG. 2 is a schematic view of the arched girder structure according to the present invention.

FIG. 3 is a schematic view of the structure of the oxidation shield of the present invention.

Reference numerals: 1. a left arm of a manipulator, 2, a support frame, 3, a support plate, 4, a limiter, 5, a base, 6, a roller, 7, a concrete pump pipe, 8, two hoisting pillars, 9, a telescopic hydraulic rod, 10, a concrete pump, 11, a concrete pump pool, 12, a pressure nozzle pipe, 13, a limit switch, 14, an upper limit, 15, a lower limit, 16, an arch-shaped bearing beam plate, 17, a transverse telescopic hydraulic rod, 18, a limit device, 19, a front limit, 20, a rear limit, 21, a right mechanical arm, 22, a nozzle, 23, a motor, 24, a gripper, 25, a swing arm, 26, a support arm, 27, a support transverse plate, 28, a telescopic arm, 29, a hydraulic rod, 30, an oxygen bag, 31, an oxygen pipe, 32, a carbon dioxide pipe, 33, an oxygen hood, 34, an oxygen making bag, 35, a first aid box, 36, soft contact plastic, 37 and a reverse return plug, 38. and reversely plugging.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings.

As shown in fig. 1 and 2, the withdrawing device of a protective working surface comprises a base 5, four rollers 6 are installed below the base, a base supporting device is installed on the front side of each roller 6, the base supporting device comprises a supporting frame 2 and a limiting stopper 4, two lifting pillars 8 are installed on two sides of the base 5, an arch-shaped bearing beam plate 16 is connected above the two lifting pillars 8 through welding, a transverse telescopic hydraulic rod 17 is installed below the arch-shaped bearing beam plate 16, an emergency protection device is installed between the arch-shaped bearing beam plate 16 and the two lifting pillars 8, the emergency protection device is installed on two sides and the upper side of the arch-shaped bearing beam plate 16 through a single-component polyurethane adhesive, a first-aid box 35 is installed on the base below the arch-shaped bearing beam plate 16, a concrete pump pipe is installed at the rear end of the arch-shaped bearing beam plate 16, mechanical arm is installed to the base front end, including manipulator left arm 1 and manipulator right arm 21, manipulator left arm 1 install in 5 left sides of base, manipulator right arm 21 install in 5 right sides of base, manipulator left arm 1 with manipulator right arm 21 top installation all installs support diaphragm 27, install dust removal sprinkler between two jack-up pillars. (ii) a When an emergency situation occurs, workers can hide in the protection device under the arched bearing beam plate at once to wait for rescue, the survival rate of the collapsed mine cavity is increased, 3 persons or 4 persons or 5 persons can live in the device for 15-30 days, so that time can be won for disaster relief workers, the retraction operation of the working surface is rapidly completed through the mutual cooperation of all parts, the arched bearing beam plate is used, the pressure of the upper coal mine can be reduced mainly under the bearing pressure, the passage is safer, the operation space is not influenced, when the mechanical arm breaks above the roadway, the upper working surface can be supported to prevent accidents, the later-stage remediation is carried out, the mechanical arm can carry out emergency treatment and send out alarm warning under the situation, the technical staff can arrive the accident roadway quickly.

Preferably, the emergency protection device comprises soft contact plastic 36, an oxygen mask 33, an oxygen pipe 31 and an oxygen bag 30, wherein the soft contact plastic 36 is hollow plastic, the soft contact plastic 36 and the arched bearing beam plate 16 are bonded and installed through a single-component polyurethane adhesive, the oxygen bag 30 is installed inside the soft contact plastic 36, the oxygen mask 33 is connected with the oxygen bag 30 through the oxygen pipe 31, and the number of the oxygen masks 33 is 3-5; prevent after the accident that the personnel from appearing in protector and the equipment between the hard contact, add soft contact plastics and hug closely on arch bearing beam board, can avoid personnel's secondary be injured like this when rocking, and the inside oxygen package that has put the silica gel material of soft contact plastics, provide personnel's breathing through the oxygen package.

Preferably, the transverse telescopic hydraulic rod 17 is provided with a limiting device, the limiting device comprises a front limiting device 19 and a rear limiting device 20, and the distance between the front limiting device 19 and the rear limiting device 20 is 3-5 cm; when the same both sides rock-wall bearing, also reach through the injection of concrete and solidify and do not use hydraulic support, just can accomplish the supporting role, practice thrift the hydraulic support pole and use, increase the frequency of use of hydraulic stem, reduce equipment waste, increase the rate of utilization of equipment.

Preferably, the support frame comprises a hydraulic rod 29 and a support plate 3, the stopper is mounted on the hydraulic rod 29, the telescopic distance of the hydraulic rod 29 is 40-70 cm, the support plate 3 is mounted below the hydraulic rod 29 by welding, the support plate 3 is square, the thickness of the support plate 3 is 5-8 cm, and the area of the support plate 3 is 400-900 square cm; the retracting device can be supported by the hydraulic rod and the supporting plate to prepare for the forward movement of the guide rail, in the supporting process, as the hard ground and the loose ground exist in the soil in the mine, the supporting plate is added to prevent the hydraulic rod from sinking into the ground in the supporting process, and bears the gravity of the whole retracting device, the thickness of the supporting plate is set to be 5-8 cm according to the gravity of the retracting device, and the area of the supporting plate is 400 plus 900 square centimeters.

As shown in fig. 2 and 3, a carbon dioxide tube 32 is installed at the lower end of the oxygen hood 33, a reverse return plug 37 is installed between the carbon dioxide tube 32 and the oxygen hood 33, an oxygen tube 31 is installed at the upper end of the oxygen hood 33, a reverse return plug 36 is installed between the oxygen tube 31 and the oxygen hood 33, an oxygen generation bag 34 is connected to one end of the carbon dioxide tube 32, sodium peroxide is installed in the oxygen generation bag 34, the oxygen generation bag 34 is installed at the inner bottom of the soft contact plastic 36, oxygen is generated through the reaction of the sodium peroxide and the carbon dioxide in the carbon dioxide tube, one end of the oxygen generation bag 34 is connected to the oxygen bag 30 through a connecting tube, and the amount of the sodium peroxide in the oxygen generation bag 34 is 2-5 kg; the carbon dioxide pipe of installation can carry the oxygen generation package with the carbon dioxide gas of personnel's exhalation in the oxygen mask, and the oxygen is produced through the reaction of carbon dioxide and the sodium peroxide in the oxygen package, carries in the oxygen package, is personnel's oxygen volume increase, and then increases personnel's survival time.

Preferably, the oxygen bag 30 is in a sheet shape, the oxygen bag 30 is made of silica gel, and the oxygen bag 30 can bear a pressure of 0.5-0.7 mpa; the oxygen bag is made of silica gel, so that the oxygen bag can not be extruded and exploded when being extruded by personnel, and the bearing pressure can be 0.5-0.7 MPa, which is enough to deal with the extrusion of the personnel or equipment.

Preferably, the dedusting spraying device comprises a spray head 22 and a pressure spray pipe 12, wherein a rotary cross rod is arranged below the spray head 22, and the pressure range of the pressure spray pipe 12 is 1.5-2.5 MPa; in the coal mining surface withdrawing engineering, a large amount of dust and coal ash are generated, so that a large amount of workers get diseases, and occupational diseases of the workers are caused.

Preferably, the left manipulator arm 1 and the right manipulator arm 21 comprise a gripper 24, a swing arm 25, a support arm 26 and a telescopic arm 28, the support transverse plate 27 is mounted at the upper end of the support arm 26 through bolts, the gripper 24 is mounted at the front end of the swing arm 25 through a servo motor and a harmonic reducer, the swing arm 25 is mounted at the front end of the support arm 26 through a cylindrical ball bearing, the support arm 26 is mounted at the front end of the telescopic arm 28 through a cylindrical ball bearing, and the rear end of the telescopic arm 28 is fixed on the base 5 through bolts; the withdrawing operation of accomplishing hydraulic support through manipulator left arm and manipulator right arm, when carrying out the withdrawing device self-moving simultaneously, through manipulator left arm with the antedisplacement operation of two guide rails is accomplished in mutually supporting of manipulator right arm, and the continuous work of withdrawing that carries on can not move ahead because the place ahead does not have the guide rail.

Preferably, the use method of the retracting device for the protective working surface comprises the following steps:

s1: in the process of withdrawing a working surface, withdrawing operation of a hydraulic support is carried out through the left manipulator arm 1 and the right manipulator arm 21, the hydraulic support is grasped through the hand grip 24 and contracted through the telescopic arm 28 to carry out withdrawing operation, the hand grip 24 transfers the hydraulic support to the base 5 through rotation of the swing arm 25, the withdrawing speed of the hydraulic support is increased through simultaneous working of the left manipulator arm 1 and the right manipulator arm 21, a large amount of dust and coal ash are generated in the process, and at the moment, the dedusting and spraying device enables the spray head 22 to spray water through the pressure spray pipe 12, so that the generation of dust and coal ash is reduced;

s2, after the hydraulic support is pulled out, the base 5 moves forwards, the arched bearing beam plate 16 props against an upper operation surface through the lifting of the two bearing support columns 8, at the moment, the concrete pump 10 extracts concrete, the concrete is injected between the arched bearing beam plate 16 and the working surface, the concrete is compacted through the injection of the concrete, the concrete is further injected through the descending of the two bearing support columns, the thickness of the concrete is 5-10 cm, and the operation is completed;

s3: in this process, the reduction of horizontal flexible hydraulic stem 17 rear, during the concrete pours into both sides cliff into, when the concrete pours into thick 3-5 centimetres into, stops to pour into, accomplishes the withdrawal work of working face, and then consolidated the safety in operation tunnel, if meet emergency, can carry out emergency refuge at the emergent protector in arch bearing beam slab below, emergent protector mainly provides spacious worker required oxygen, first aid medicine, water food etc. when emergency appears.

Compared with the prior art, the invention has the beneficial effects that: the utility model provides a more efficient, more practical fully mechanized coal mining withdrawing device, can directly once take out hydraulic support, replaced the artifical support of monomer pillar during working face withdrawal, guaranteed the support intensity simultaneously.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions are considered to be within the protective scope of the present invention.