CN-121994097-A - Hole blocking device for preventing explosive powder return and hole blocking process

CN121994097ACN 121994097 ACN121994097 ACN 121994097ACN-121994097-A

Abstract

The invention discloses a hole blocking device and a hole blocking process for preventing powder return of explosive. The hole plugging device comprises an upper structure and a middle connecting structure, wherein the upper structure is arranged in a rock body, the upper structure comprises an upper cylindrical shell, the top end of the upper cylindrical shell comprises a one-way single door, the inner wall of the upper cylindrical shell comprises a limiting collar, a rubber ferrule and a one-way cutting groove, the lower end of the outer wall of the upper cylindrical shell is provided with an upper elastic inverted wedge and a locating pin, the middle connecting structure comprises a middle cylindrical shell with a hollow structure, the middle cylindrical shell is sleeved outside the upper cylindrical shell, an L-shaped pressing groove for pressing the upper elastic inverted wedge is cut at the upper end of the inner wall of the middle cylindrical shell, an L-shaped locating groove is cut at the side wall of the middle cylindrical shell, and when the locating pin is positioned at the right lower end of the L-shaped locating groove, the upper elastic inverted wedge is pressed inside the L-shaped pressing groove. The invention has the advantages of simple installation, reliable fixation, safe use and consideration of the subsequent explosive adjustment requirement, and can realize the accurate adaptation of accessories.

Inventors

Mei Linfang
ZHANG CHONG
WANG RUI
YOU WENBIN
YAO JIAN
SUN BAOPING
XIAO BO
HAN YAMIN
YANG GEN
ZHAO GUOLIANG
He Zhuoting
HUANG CHANGJIANG
WANG CHAO

Assignees

武钢资源集团程潮矿业有限公司

Dates

Publication Date: 20260508
Application Date: 20260122

Claims (9)

1. The hole blocking device for preventing powder return of explosive is characterized by comprising an upper structure (1) and a middle connecting structure (2) which are arranged in a rock body, wherein the upper structure (1) and the middle connecting structure (2) are respectively matched with a drug delivery pipe (4); The upper structure (1) comprises an upper cylindrical shell (1-1) with a hollow structure, a unidirectional single door (1-2) which can only open towards the outer side and is automatically reset to be closed is arranged at the top end of the upper cylindrical shell (1-1), and a sealing state is formed between the unidirectional single door (1-2) and the upper cylindrical shell (1-1) when the unidirectional single door is closed; The inner wall of the upper cylindrical shell (1-1) is provided with a limit collar (1-3), the bottom end of the limit collar (1-3) is provided with a rubber ferrule (1-4) which is matched with the drug delivery tube (4), the inner diameter of the limit collar (1-3) is smaller than the outer diameter of the rubber ferrule (1-4), the rubber ferrule (1-4) is tightly attached to the head of the drug delivery tube (4), the inner wall of the upper cylindrical shell (1-1) is also provided with a one-way cutting groove (1-5) for cutting the rubber ferrule (1-4), and the one-way cutting groove (1-5) is positioned at the bottom end of the limit collar (1-3) and is arranged at a position corresponding to the rubber ferrule (1-4); The lower end of the outer wall of the upper cylindrical shell (1-1) is provided with an upper elastic inverted wedge (1-6), the upper elastic inverted wedge (1-6) is of an annular tooth-shaped structure, the annular tooth-shaped structure inclines towards the inside of a drill hole, and is attached to the upper cylindrical shell (1-1) in a folded state, and the tooth-shaped structure is tightly clamped with the inner wall of the drill hole after being unfolded; The middle connecting structure (2) comprises a middle cylindrical shell (2-1) with a hollow structure, the middle cylindrical shell (2-1) is sleeved outside the upper cylindrical shell (1-1), an L-shaped pressing groove (2-2) for pressing the upper elastic reverse wedge (1-6) is formed in the upper end of the inner wall of the middle cylindrical shell (2-1), the top end of the L-shaped pressing groove (2-2) is located below the upper elastic reverse wedge (1-6), an L-shaped positioning groove (2-3) matched with the positioning pin (1-7) is formed in the side wall of the middle cylindrical shell (2-1), and the positioning pin (1-7) is pressed inside the L-shaped pressing groove (2-2) when the positioning pin (1-7) is located at the right lower end of the L-shaped positioning groove (2-3).
2. The hole plugging device for preventing explosive powder return according to claim 1, further comprising a lower structure (3) arranged in a rock body, wherein the lower structure (3) is matched with the drug delivery pipe (4), the lower structure (3) comprises a lower cylindrical shell (3-1) with a hollow structure, the lower cylindrical shell (3-1) is connected with the middle cylindrical shell (2-1) into a whole, a lower elastic reverse wedge (3-2) is arranged on the upper portion of the outer wall of the lower cylindrical shell (3-1), and the lower elastic reverse wedge (3-2) is in an annular tooth structure and inclines towards the outside of a drilled hole.
3. The hole plugging device for preventing explosive powder return according to claim 2, wherein an annular groove (3-3) is cut at the lower part of the inner wall of the lower cylindrical shell (3-1), and balls (3-4) are wrapped in the annular groove (3-3).
4. The hole plugging device for preventing powder return of explosive according to claim 3, wherein the balls (3-4) are made of wear-resistant alloy steel.
5. The hole plugging device for preventing powder return of explosive according to claim 1, wherein the unidirectional cutting grooves (1-5) are vertically arranged with the rubber ferrule (1-4), and the unidirectional cutting grooves (1-5) are of a metal cutting edge structure inclined in a counterclockwise direction.
6. The hole plugging device for preventing powder return of explosives of claim 5, wherein: The locating pin (1-7) is in clearance fit with the L-shaped locating groove (2-3).
7. The hole plugging device for preventing powder return of explosive according to claim 6, wherein the upper elastic reverse wedge (1-6) is made of spring steel and is uniformly arranged along the outer wall of the upper cylindrical shell (1-1).
8. The hole plugging process for preventing explosive powder return is suitable for the hole plugging device for preventing explosive powder return according to any one of claims 1-7, and is characterized by comprising the following steps: s1) drilling a drilling hole, wherein the drilling hole is matched with the outer diameter of the hole plugging device; The rubber ferrule (1-4) is manually clamped at the head of the matched medicine delivery tube (4), so that the rubber ferrule (1-4) is tightly attached to the head of the medicine delivery tube (4), and then the head of the matched medicine delivery tube (4) drives the rubber ferrule (1-4) to sequentially penetrate into the lower cylindrical shell (3-1), the middle cylindrical shell (2-1) and the upper cylindrical shell (1-1), so that the rubber ferrule (1-4) is just clamped at the bottom end position of the limiting collar (1-3) on the inner wall of the upper cylindrical shell (1-1); S2) synchronously pushing the hole plugging device to a designated position of a drill hole through a medicine conveying pipe (4), rotating the medicine conveying pipe (4) anticlockwise, driving a positioning pin (1-7) to transversely move leftwards along an L-shaped positioning groove (2-3) until the medicine conveying pipe (4) cannot move, pushing the medicine conveying pipe (4) towards the inside of the drill hole, driving the positioning pin (1-7) to vertically move upwards along the L-shaped positioning groove (2-3), and synchronously driving an upper elastic reverse wedge (1-6) clamped by the positioning pin to be outwards unfolded, so that the upper elastic reverse wedge (1-6), a lower elastic reverse wedge (3-2) and the inner wall of the drill hole are fixedly clamped; S3) rotating the medicine conveying pipe (4) clockwise, cutting off the rubber sleeve ring (1-4) by the unidirectional cutting groove (1-5) to release the medicine conveying pipe (4), extending the medicine conveying pipe (4) into the drill hole to convey explosive into the drill hole, and pulling out the medicine conveying pipe (4) after medicine conveying is completed.
9. The process for blocking holes for preventing powder return of explosive according to claim 8, further comprising step S4), if the explosive is required to be added or reduced, reinserting the explosive delivery pipe (4) into the hollow channel of the hole blocking device, performing corresponding explosive adding or extracting, and finally pulling out the explosive delivery pipe (4).

Description

Hole blocking device for preventing explosive powder return and hole blocking process Technical Field The invention belongs to the technical field of mining engineering blasting construction, and particularly relates to a hole blocking device for preventing explosive powder return and a hole blocking process. Background In mining blasting engineering, it is often necessary to drill holes in the upper layers of the rock mass and to fill the explosive with explosives through the feeder tubes. However, the explosive is easy to return powder due to inclination of drilling holes and gravity action in the filling process, so that the filling quantity of the explosive is insufficient, the blasting effect is poor, and even potential safety hazards are caused. Thus, it is necessary to plug the hole after the explosive charge is filled. However, the conventional hole plugging device has the following technical problems. Firstly, the fixing reliability is poor, the traditional hole plugging member is of a single plug body structure, is not tightly attached to the inner wall of a drilled hole, is easy to loosen due to the impact of explosive or slight disturbance of rock mass, and cannot effectively prevent powder return; secondly, the operation is complicated, the installation of the partial hole plugging device is carried out by a special tool, and the device is difficult to disassemble or adjust after the installation, so that the subsequent supplement or the reduction of the explosive amount is inconvenient; thirdly, the safety is insufficient, part of devices lack of safety designs such as round corner treatment, the inner wall of a medicine conveying pipe or a drill hole is easy to scratch in the installation process, and the explosion safety risk exists; fourth, the fitting suitability is poor, the drug delivery pipe and the hole plugging device have no special positioning structure, and the rubber ferrule is easy to deviate to cause asynchronous pushing, so that the installation efficiency is affected. Disclosure of Invention Aiming at the defects of the prior art, the invention provides the hole plugging device and the hole plugging process for preventing explosive powder return, which have the advantages of simple installation, reliable fixation, safe use and consideration of the subsequent explosive adjustment requirement, and can realize the accurate adaptation of accessories so as to adapt to the actual requirement of mining blasting construction. In order to achieve the aim, the invention designs a hole plugging device for preventing powder return of explosive, which is characterized by comprising an upper structure and a middle connecting structure which are arranged in a rock body, wherein the upper structure and the middle connecting structure are respectively matched with a drug delivery pipe for use; the upper structure comprises an upper cylindrical shell with a hollow structure, a unidirectional single door which can only open towards the outer side and is automatically reset and closed is arranged at the top end of the upper cylindrical shell, and a sealing state is formed between the unidirectional single door and the upper cylindrical shell when the unidirectional single door is closed; The upper cylindrical shell inner wall is also provided with a one-way cutting groove for cutting the rubber ferrule, the one-way cutting groove is positioned at the bottom end of the limiting collar and is arranged at a position corresponding to the rubber ferrule; the lower end of the outer wall of the upper cylindrical shell is provided with an upper elastic inverted wedge which is in an annular tooth-shaped structure, the annular tooth-shaped structure inclines towards the inside of the drill hole, and is attached to the upper cylindrical shell in a folded state, and the tooth-shaped structure is tightly clamped with the inner wall of the drill hole after being unfolded; The middle connecting structure comprises a middle cylindrical shell of a hollow structure, the middle cylindrical shell is sleeved outside the upper cylindrical shell, an L-shaped pressing groove for pressing the upper elastic reverse wedge is formed in the upper end of the inner wall of the middle cylindrical shell, the top end of the L-shaped pressing groove is located below the upper elastic reverse wedge, an L-shaped positioning groove matched with the positioning pin is formed in the side wall of the middle cylindrical shell, and when the positioning pin is located at the right lower end of the L-shaped positioning groove, the upper elastic reverse wedge is pressed inside the L-shaped pressing groove. The hole plugging device comprises a rock body, a hole plugging device and a hole plugging device, wherein the hole plugging device body is characterized by further comprising a lower structure arranged in the rock body and used with a drug delivery pipe in a matched mode, the lower structure comprises a lower cylindrical shell of a hollow