CN-224202315-U - Blast hole sealing device for underground coal mine roof cutting blasting

Abstract

The utility model relates to the technical field of coal mines, in particular to a blast hole sealing device for underground roof cutting blasting of a coal mine, which comprises a top plate fixedly connected with the top of a top frame, a hydraulic oil cylinder fixedly connected with the top of the top plate through bolts, an output shaft of the hydraulic oil cylinder penetrates through the top of the top plate and is fixedly connected with the top of a fixed plate, a plurality of struts are fixedly connected with the bottom of the fixed plate, the extending ends of all struts sequentially penetrate through the top of the top frame and the side wall of a bearing cylinder, and an annular plate is fixedly connected with the bottom of the fixed plate. Through the design that uses branch and inserted bar for the connection between hole sealing device and the blast hole inner wall is more firm, has avoided traditional hole sealing material like yellow mud to become invalid spun problem because of the axial impact force that explosive explosion produced, thereby has improved the whole steadiness and the sealing performance of blast hole shutoff, because whole device can closely laminate the blast hole inner wall, and realize the steadiness through mechanical structure rather than loose hole sealing agent.

Inventors

• LU WENLONG
• GU QINGHENG
• WEN XIAOSONG
• Shi Zhihan
• KONG LINGZHE

Assignees

• 安徽理工大学

Dates

Publication Date

20260505

Application Date

20250621

Claims (6)

1. 1. The blast hole sealing device for underground roof cutting blasting of the coal mine comprises a top frame, and is characterized in that, The device also comprises a bearing cylinder fixedly connected with the bottom of the top frame, and a fixing plate is connected with the inner side of the top frame in a sliding manner; The top fixedly connected with roof of top frame, and the top of roof passes through bolt fixedly connected with hydraulic cylinder to fixedly connected with between the top of hydraulic cylinder's the output shaft runs through roof and fixed plate, the bottom fixedly connected with a plurality of branch of fixed plate, and the extension end of all branches all runs through the top of top frame and the lateral wall of bearing a section of thick bamboo in proper order, the bottom fixedly connected with annular plate of fixed plate, and the bottom fixedly connected with of annular plate a plurality of montant to the bottom of bearing a section of thick bamboo is equipped with the bottom plate, wherein all the bottom of montant all is fixedly connected with between the top of bottom plate, the bottom fixedly connected with a plurality of inserted bar of bottom plate.
2. 2. The blast hole sealing device for underground coal mine roof cutting blasting according to claim 1, wherein, The outside of bearing a weight of a section of thick bamboo has cup jointed annular gasbag, and the outside fixedly connected with a plurality of bracing piece of annular gasbag to the outer wall one side of top frame is through bolt fixedly connected with air pump, and wherein the exit of air pump communicates each other with the top one side of annular gasbag.
3. 3. The blast hole sealing device for underground coal mine roof cutting blasting according to claim 1, wherein, The both sides of fixed plate are all fixedly connected with slider, and two sliders all pass through sliding connection between the lateral wall of spout and top frame.
4. 4. A blast hole sealing device for underground coal mine roof cutting blasting according to claim 2, wherein, The outlet of the air pump is communicated with an air pipe, and one end of the air pipe penetrates through the top of the top frame and one side of the top of the annular air bag to be communicated with each other.
5. 5. The blast hole sealing device for underground coal mine roof cutting blasting according to claim 1, wherein, The output shaft of the hydraulic cylinder is in sliding connection with the connecting part of the top plate.
6. 6. The blast hole sealing device for underground coal mine roof cutting blasting according to claim 1, wherein, All the connection parts of the supporting rods and the bearing cylinder are in sliding connection, and the lower parts of all the supporting rods are distributed in an arc shape.

Description

Blast hole sealing device for underground coal mine roof cutting blasting Technical Field The utility model relates to the technical field of coal mines, in particular to a blast hole sealing device for underground roof cutting blasting of a coal mine. Background The hole sealing of the blast hole is a key link in the underground roof cutting blasting operation of the coal mine, and has the function of effectively sealing the blast hole after the explosive is filled, so that the explosive can form enough blasting pressure when being detonated, and the directional breaking and cutting of roof rocks are realized. The good hole sealing effect can not only improve the blasting efficiency, but also reduce the diffusion of harmful gas and dust generated by blasting, and ensure the safety of the underground operation environment. As one of the core components in the blasting process, the structural design of the blast hole sealing device and the performance of the sealing material have decisive influence on the overall blasting effect, safety and construction efficiency. Particularly in the core link of hole sealing of the blast hole, the existing hole sealing equipment and method gradually expose a series of obvious limitations and technical problems when dealing with complex working conditions such as deep holes, large drug loading and the like. For example, the utility model patent CN212458150U discloses a deep hole blasting hole sealing device and a deep hole blasting hole sealing structure, and belongs to the technical field of deep hole blasting. At present, the deep hole explosion hole sealing is mostly carried out by adopting yellow mud or traditional hole sealing agent, and the situation that the explosion effect is seriously influenced and larger potential safety hazard is brought because the explosive loading length is longer, the explosive loading quantity is larger, and larger axial impact force is generated when the explosive explodes, so that the loose hole sealing materials such as yellow mud are extremely easy to fail and are ejected, and the hole spraying phenomenon occurs. In addition, the existing hole sealing agent is loose in material, difficult to agglomerate, difficult to accurately reach a designated position in a deep hole in the conveying process, and difficult to fully contact with water after conveying so as to realize expansion solidification, so that the problems of insufficient hole sealing strength, unstable hole sealing effect and the like are caused. The connection between the blast hole sealing device and the inner wall of the blast hole in the prior art is not firm, so that the whole hole sealing structure is easy to displace or even fall off when being subjected to blasting impact, and the overall stability and sealing performance of the blast hole sealing are further reduced. The problems not only obviously increase the construction difficulty and the rework rate, but also can bring potential threat to the mine production safety, and are difficult to meet the requirements of modern coal mine underground efficient, safe and environment-friendly blasting operation. Therefore, in view of the shortcomings in the prior art, there is a need for a blast hole sealing device for underground roof cutting blasting of coal mine, which is used for solving the above problems. Disclosure of utility model The utility model aims to provide a blast hole sealing device for underground roof cutting blasting of a coal mine, which solves the problems that the whole hole sealing structure is easy to displace or even fall off when being subjected to blasting impact due to weak connection between the blast hole sealing device and the inner wall of the blast hole in the prior art, and the overall stability and sealing performance of the blast hole sealing are reduced. In order to achieve the aim, the utility model provides a blast hole sealing device for underground roof cutting blasting of a coal mine, which comprises a top frame, wherein the bottom of the top frame is fixedly connected with a bearing cylinder, and the inner side of the top frame is connected with a fixing plate in a sliding manner; The top fixedly connected with roof of roof frame, and the top of roof passes through bolt fixedly connected with hydraulic cylinder, and fixed connection between the top of hydraulic cylinder's the output shaft running through roof and fixed plate, the bottom fixedly connected with branch of fixed plate, and the extension end of all branches all runs through the top of roof frame and the lateral wall of bearing a section of thick bamboo in proper order, the bottom fixedly connected with annular plate of fixed plate, and the bottom fixedly connected with a plurality of montant of annular plate, and the bottom of bearing a section of thick bamboo is equipped with the bottom plate, wherein all the bottom of montant all with the top of bottom plate between fixed connection, the bottom fixedly connected with