CN219299331U

CN219299331U - Recoverable roadway support-isolation system capable of preventing air leakage along gob-side entry retaining

Info

Publication number: CN219299331U
Application number: CN202320135385.7U
Authority: CN
Inventors: 李青海; 李东发; 孔彪; 王昌祥; 刘进晓; 刘奇; 段宏海; 史卫平; 路瑶
Original assignee: State Grid Energy Hami Coal Power Co ltd Dananhu No 1 Mine; Shandong University of Science and Technology; Anhui University of Science and Technology
Current assignee: State Grid Energy Hami Coal Power Co ltd Dananhu No 1 Mine; Shandong University of Science and Technology; Anhui University of Science and Technology
Priority date: 2023-01-18
Filing date: 2023-01-18
Publication date: 2023-07-04
Anticipated expiration: 2033-01-18

Abstract

The utility model discloses a recoverable roadway support-isolation system for air leakage prevention of a gob-side entry retaining, and relates to the technical field of underground mining area support and isolation of coal mines. The support device comprises a plurality of single hydraulic struts, wherein each single hydraulic strut comprises a strut main body, trays are respectively arranged at the top end and the bottom end of the strut main body, threaded sleeves are respectively arranged at one sides, close to the strut main body, of the two trays, the two threaded sleeves are fixedly connected with the two trays, and the two threaded sleeves are sleeved at the two ends of the strut main body; the wind-proof device comprises an air bag, the air bag comprises an air bag main body, an air valve is arranged on the air bag main body, and the air bag main body is inflated through the air valve. The system can realize the yielding support of the goaf, can ensure the isolation and air leakage prevention effects, and can improve the sealing and isolation efficiency.

Description

Recoverable roadway support-isolation system capable of preventing air leakage along gob-side entry retaining

Technical Field

The utility model relates to the technical field of underground mining area support and isolation of coal mines, in particular to a recoverable roadway support-isolation system for air leakage prevention of gob-side entry retaining.

Background

The gob-side entry retaining technology is one development direction of a coal pillar-free mining technology, and is used for maintaining a roadway at the edge of a goaf behind a working face, namely, in the working face stoping process, the stoping roadway of the working face is reserved as a stoping roadway close to the working face through effective roadside support and intra-roadway support technologies. However, since the gob-side entry retaining is located behind the working face, the mine pressure caused by the mining influence of the two working faces is stronger than the mine pressure caused by the coal pillar protection of the gob-side entry retaining, and the gob-side entry retaining is difficult to maintain. In addition, because the gob-side entry retaining can cause air leakage in the working surface area, spontaneous combustion of residual coal or low-oxygen gas rushing into the working surface can be easily caused, and the support is needed to be isolated.

It follows that there is a need for further improvements in the art.

Disclosure of Invention

The utility model aims to provide a recoverable roadway support-isolation system for air leakage prevention of a gob-side entry retaining, which can realize pressure yielding support of a goaf, can ensure an isolation air leakage prevention effect and can improve the sealing and isolation efficiency.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the recoverable roadway support-isolation system comprises a support device and a windproof device, wherein the support device comprises a plurality of single hydraulic struts, each single hydraulic strut comprises a strut main body, trays are respectively arranged at the top end and the bottom end of the strut main body, threaded sleeves are respectively arranged at one side, close to the strut main body, of each two trays, the two threaded sleeves are fixedly connected with the two trays, and the two threaded sleeves are sleeved at two end parts of the strut main body;

the main body of the support post is also provided with a hook;

the wind-proof device comprises an air bag, the air bag comprises an air bag main body, an air valve is arranged on the air bag main body, the air bag main body is internally inflated through the air valve, the top surface and the bottom surface of the inflated air bag main body are respectively attached to a top plate and a bottom plate of a roadway, the width of the inflated air bag main body is equal to the interval between adjacent single hydraulic struts, and two sides of the air bag main body are respectively connected to the corresponding single hydraulic struts.

As a preferred embodiment of the present utility model, a shock absorbing material is filled between the threaded sleeve and the post body.

As another preferable mode of the utility model, an annular hook is arranged on the air bag main body close to the single hydraulic prop, and the air bag main body is connected to the corresponding single hydraulic prop through the annular hook.

Further preferably, the air bag body is made of a rubber material having abrasion resistance.

Further, the air valve comprises an air chamber, a spring and a movable rod, wherein the spring is sleeved on the movable rod, the top end of the spring is fixed at the top of the inner wall of the air chamber, the bottom end of the spring is fixed at the tail of the movable rod, and the top end and the bottom end of the movable rod are respectively tightly attached to the top end and the bottom end of the air chamber.

Compared with the prior art, the utility model has the following beneficial technical effects:

the utility model provides a recoverable roadway support-isolation system for gob-side entry retaining leakage prevention, which combines a support device and a wind prevention device, so that the pressure yielding support of a goaf can be realized, and the effect of isolating leakage prevention can be ensured.

The supporting device consists of a plurality of single hydraulic struts, wherein each single hydraulic strut comprises a strut main body and trays positioned at the top end and the bottom end of the strut main body, the two trays can increase the stress areas at the two ends of the single hydraulic struts, reduce the pressure intensity and prevent the phenomena of top drilling and bottom drilling. The two ends of the prop main body are also provided with threaded sleeves, damping materials are filled between the prop main body and the threaded sleeves, and when the prop main body is pressed, the time for releasing the pressure of the single hydraulic prop is increased through the damping effect of the damping materials and the threaded sleeves, so that the force on the concentrated threaded sleeves can be gradually released.

The air bags are positioned between two adjacent single hydraulic struts, and are fixed in a hanging or other mode, so that an isolation effect can be achieved.

In summary, the recoverable roadway support-isolation system for preventing air leakage in gob-side entry retaining can solve the technical problems of drilling top, drilling bottom, bending deformation and difficult recovery of single hydraulic props; the single hydraulic prop adapts to the sinking actual movement condition of the goaf roof, is beneficial to yielding support and keeps the roof complete; the single hydraulic prop is matched with the air bag, so that the problem of air leakage is solved, and the operation is simple. The support-isolation system can be recycled and reused, and has higher efficiency.

Drawings

The utility model is further described below with reference to the accompanying drawings:

FIG. 1 is a schematic diagram of the usage state of the recoverable roadway support-isolation system for preventing air leakage in gob-side entry retaining according to the present utility model;

FIG. 2 is a schematic structural view of a single hydraulic prop of the present utility model;

FIG. 3 is a schematic view of a threaded sleeve on the top end of the post body according to the present utility model;

FIG. 4 is a schematic view of a threaded sleeve at the bottom end of the post body of the present utility model;

FIG. 5 is a schematic view of the structure of the air bag according to the present utility model;

FIG. 6 is a schematic diagram of the air valve structure of the present utility model;

in the figure:

1. the hydraulic support comprises a first tray, 2, a second tray, 3, a threaded sleeve, 4, threads, 5, a single hydraulic prop, 6, a damping material, 7, a hook, 8, a safety valve, 9, an air bag, 10, an annular hook, 11, an air valve, 12, a movable rod, 13, an air chamber, 14 and a spring.

Detailed Description

The utility model provides a recoverable roadway support-isolation system for air leakage prevention of an gob-side entry retaining, which is further described below by combining specific embodiments in order to make the advantages and the technical scheme of the utility model clearer and more definite.

Referring to fig. 1 to 2, the recoverable roadway support-isolation system for preventing leakage of air in a gob-side entry retaining comprises a support device and a wind prevention device, wherein the support device comprises a plurality of single hydraulic supports 5, and referring to fig. 2 to 4, each single hydraulic support 5 comprises a support main body, a first tray 1 positioned at the top end and a second tray 2 positioned at the bottom end of the support main body are respectively arranged at the top end and the bottom end of the support main body, and the first tray 1 and the second tray 2 are in a quadrilateral shape or a round shape. Through the setting of first tray and second tray, can increase the area of atress at monomer hydraulic prop both ends, reduce pressure, prevent to bore top, bore the bottom phenomenon emergence.

The two trays are respectively provided with a threaded sleeve 3 at one side close to the main body of the support, the two threaded sleeves are fixedly connected with the two trays together, and the two threaded sleeves are sleeved at the two ends of the main body of the support; the whole body of the threaded sleeve is provided with threads 4, and damping materials 6 are filled between the threaded sleeve and the main body of the support, wherein the damping materials are PU foam, composite pearl foam and the like. The threaded sleeve and the damping material are matched with each other, when the hydraulic prop is pressed, the time for releasing the pressure of the single hydraulic prop can be increased through the buffering action of the damping material and the threaded sleeve, and the force concentrated on the threaded sleeves at the two ends of the single hydraulic prop can be released slowly.

The main body of the support is also provided with a hook 7 and a safety valve 8 which can be automatically closed, and the arrangement of the hook can facilitate the installation of the air bag of the wind-proof device.

As shown in fig. 6, the wind-proof device comprises an air bag 9, and the air bag comprises an air bag main body which is made of a rubber material with wear resistance, and can be folded and conveniently placed for storage. The bottom of gasbag main part is provided with the pneumatic valve, and the pneumatic valve is connected the tuber pipe in pit and is inflated, promptly: the underground air pipe inflates the air bag main body through the air valve, the top surface and the bottom surface of the inflated air bag main body are respectively attached to the top plate and the bottom plate of the roadway, the width of the inflated air bag main body is equal to the interval between the adjacent single hydraulic struts, and the two sides of the air bag main body are respectively connected to the corresponding single hydraulic struts. The top surface, the bottom surface and the two side surfaces of the inflated air bag main body are respectively and tightly attached to the top plate, the bottom plate and the single hydraulic prop on the left side and the right side of the roadway, so that a sealed air wall is formed, and air leakage is prevented.

An annular hook 10 is arranged on the air bag main body close to the single hydraulic prop, and the air bag main body is connected to the corresponding single hydraulic prop through the annular hook 10.

Further, as shown in fig. 5, the air valve 11 comprises an air chamber 13, a spring 14 and a movable rod 12, the spring is sleeved on the movable rod, the top end of the spring is fixed at the top of the inner wall of the air chamber, the bottom end of the spring is fixed at the tail of the movable rod, and the top end and the bottom end of the movable rod are respectively tightly attached to the top end and the bottom end of the air chamber.

The following describes a method for using the recoverable roadway support-isolation system capable of preventing air leakage in a gob-side entry retaining.

Firstly, as shown in fig. 1, firstly, a row of single hydraulic struts are supported along the rear of a tail beam of a bracket, the single hydraulic struts are sequentially driven at a supporting density d along a working surface while the hydraulic brackets are sequentially removed, and when the number of the single hydraulic struts is calculated to be not an integer, a rounding is added;

and step two, after all the single hydraulic struts are erected, arranging air bags among the single hydraulic struts, and sequentially hanging annular hooks on the air bags on the hooks of all the single hydraulic struts. After the air bags are arranged, the underground air pipe is connected with the air valve, and each air bag is inflated in sequence. After the inflatable bag is inflated, the air valve is automatically closed to effectively prevent the air bags from leaking, the air bags are in close contact with each other, the space between the top plate and the bottom plate is filled, and air leakage is effectively prevented;

and thirdly, recycling the single hydraulic prop and the air bag, wherein the single hydraulic prop can be compressed and recycled by adjusting hydraulic pressure. The air bag can be deflated through the movable rod, compressed, folded and recycled, and can be used for supporting and isolating the next working surface after recycling.

Parts not described herein may be realized by reference to the prior art.

Although terms such as the first tray 1, the second tray 2, the threaded sleeve 3, the threads 4, etc. are more used herein, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.

It should be further understood that the specific embodiments described herein are merely illustrative of the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. The utility model provides a recoverable roadway support of gob-side entry leak protection wind-isolated system, its includes support device and wind-proof device, its characterized in that:

the supporting device comprises a plurality of single hydraulic struts, wherein each single hydraulic strut comprises a strut main body, trays are respectively arranged at the top end and the bottom end of the strut main body, threaded sleeves are respectively arranged at one sides of the two trays, which are close to the strut main body, and the two threaded sleeves are fixedly connected with the two trays together and sleeved at two end parts of the strut main body;

the main body of the support post is also provided with a hook;

2. The recoverable roadway support-isolation system for gob-side entry retaining air leakage prevention of claim 1, wherein: and a damping material is filled between the threaded sleeve and the pillar main body.

3. The recoverable roadway support-isolation system for gob-side entry retaining air leakage prevention of claim 1, wherein: an annular hook is arranged on the air bag main body close to the single hydraulic prop, and the air bag main body is connected to the corresponding single hydraulic prop through the annular hook.

4. The recoverable roadway support-isolation system for gob-side entry retaining air leakage prevention of claim 1, wherein: the air bag main body is made of wear-resistant rubber materials.

5. The recoverable roadway support-isolation system for gob-side entry retaining air leakage prevention of claim 1, wherein: the air valve comprises an air chamber, a spring and a movable rod, wherein the spring is sleeved on the movable rod, the top end of the spring is fixed at the top of the inner wall of the air chamber, the bottom end of the spring is fixed at the tail of the movable rod, and the top end and the bottom end of the movable rod are respectively tightly attached to the top end and the bottom end of the air chamber.