Gob-side entry retaining deep hole roof cutting pressure relief blasting hole clamping-free stemming device

Abstract

The utility model discloses a gob-side entry retaining deep hole top cutting pressure relief blasting hole-clamping-free stemming device which comprises a stemming barrel and a bakelite tamping bar, the edge of the outer bottom of the stemming barrel is connected with a steel wire pull rope, a stop pin is arranged on the bakelite tamping bar to prevent the bakelite tamping bar from falling into a blast hole, and the steel wire pull rope penetrates through a stop pin hole. Then the stemming barrel is fed into a blast hole needing to be filled, the bakelite tamping bar is pushed to push stemming into the blast hole and tamped, and after the operation is completed, the stemming barrel and the bakelite tamping bar are pulled out of the blast hole together by pulling the steel wire pull rope, so that one-time stemming hole sealing work is completed. The gun head and the bakelite gun stick are treated through chemical agents, the underground flame-retardant and antistatic requirements are met, installation is convenient and fast, disassembly and adjustment are avoided, the cost is low, and the problem that in the using process of a traditional gun stick and a stemming barrel, continuous butt joint needs to be conducted, and consequently the hole sealing work efficiency is low is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of blasting equipment, in particular to a device for blasting mud without jamming a hole by cutting the top of a deep hole and unloading pressure during blasting along a gob-side tunnel retention. Background Art

[0002] In my country's mining production, deep hole drilling directional fracture blasting is a common blasting method for the advanced working face of the underground coal mine along the goaf. Its main function is to achieve efficient use of explosives and precise control of blasting cracks, which can not only break the key layer outside the goaf, but also reduce the squeezing effect of the key layer on the top coal above the goaf during the breaking and rotation process, reduce the deformation of the goaf surrounding rock, and effectively avoid the sinking and large deformation of the roof step in the goaf. In order to ensure the safety of blasting and the efficient use of explosive energy, the charged blast holes must be sealed in strict accordance with the sealing requirements. Through practice and research, it is shown that reasonable gun mud filling can avoid punching, ensure the safety of the roof and the blasting effect, prolong the action time of the blasting gas in the blast hole, improve the utilization rate of the explosion energy, and maintain the high temperature conditions in the blast hole for a longer time, thereby improving the completeness of the chemical reaction of the explosive and reducing the generation of harmful gases.

[0003] Therefore, when the directional blasting gun mud is blocked, the gun stick and the gun mud tube should be used to repeatedly squeeze the gun mud to ensure that the gun hole is safely and reliably sealed, which is the key to ensure the success of directional fracture blasting. However, the existing gun stick and the gun mud tube need to be continuously connected during use, which leads to low efficiency of the hole sealing work. In order to improve the work efficiency, it is urgent to improve the traditional gun mud blocking method. Utility Model Content

[0004] The utility model aims to provide a deep hole top cutting and pressure relief blasting device for free of jamming holes and pounding mud along goaf-retaining lanes. The existing blasting stick and blasting mud tube need to be continuously connected during use, which leads to the problem of low efficiency of hole sealing.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is: a deep hole cutting and top-relief blasting device for jam-free hole tamping, comprising a gun mud tube and a bakelite gun stick; the top of the gun mud tube is open for filling gun mud into the gun mud tube, and the bottom of the gun mud tube is opened for inserting the bakelite gun stick; the bakelite gun stick is a wooden long cylinder with a diameter smaller than the inner diameter of the hole opened at the bottom of the gun mud tube, and a wooden gun head is connected to the top of the bakelite gun stick, and the wooden gun head is a cylinder with a diameter smaller than the inner diameter of the gun mud tube and larger than the inner diameter of the hole opened at the bottom of the gun mud tube.

[0006] The technical solution of the utility model also has the following characteristics:

[0007] As a preferred improvement scheme of the utility model, a pull rope is connected to the outer bottom edge of the gun mud barrel.

[0008] As a preferred improvement of the present utility model, the draw rope is a steel wire draw rope.

[0009] As a preferred improvement scheme of the utility model, a stop pin is provided on the bakelite cannon stick.

[0010] As a preferred improvement of the utility model, a pin hole is provided on the stop pin, and the pull rope passes through the pin hole.

[0011] The beneficial effects of the utility model are as follows: the deep hole cutting and top-cutting pressure-relieving blasting device for retaining lanes along the goaf and free-of-stuck blasting mud device of the utility model adopts a plug-in method to connect the wooden blasting head and the bakelite blasting stick with the blasting mud tube, which is convenient and fast, does not require disassembly or adjustment, and has low cost. It solves the problem of low efficiency in sealing the hole caused by the need for continuous docking between the traditional blasting stick and the blasting mud tube, and the size and length can be determined according to the actual situation on site, so it can be used in construction sites under different circumstances. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of a deep hole top cutting and pressure relief blasting and free-stuck hole pounding mud device for gob-side lane retention according to the utility model;

[0013] Figure 2 It is a structural schematic diagram of a blasting mud barrel in a deep hole top cutting and pressure relief blasting and jam-free hole tamping blasting mud device along goaf-retaining lane according to the utility model;

[0014] Figure 3 It is a structural schematic diagram of a bakelite blasting stick in a deep hole top cutting and pressure relief blasting and jam-free hole pounding mud device for retaining lanes along the goaf of the utility model.

[0015] In the picture, 1. gun mud tube, 2. gun mud, 3. wooden gun head, 4. stop pin, 5. pull rope, 6. Bakelite gun stick. DETAILED DESCRIPTION

[0016] The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0017] Example 1

[0018] Reference Figure 1 The utility model discloses a deep hole top cutting and pressure relief blasting device for free-stuck hole pounding and mud pounding along goaf-retaining lane, comprising a mud pounding tube 1 and a bakelite pounding stick 6.

[0019] Combination Figure 2 The top of the gun mud tube 1 is open, which is used to fill the gun mud 2 into the gun mud tube 1, and the bottom of the gun mud tube 1 is opened, and the hole is used to insert the bakelite gun stick 6.

[0020] Combination Figure 3 The bakelite gun stick 6 is a wooden long cylinder with a diameter slightly smaller than the hole at the bottom of the gun mud tube 1. The top of the bakelite gun stick 6 is connected to the wooden gun head 3. The wooden gun head 3 is a cylinder with a diameter slightly smaller than the inner diameter of the gun mud tube 1 but larger than the inner diameter of the hole at the bottom of the gun mud tube 1.

[0021] It should be noted here that: in the deep hole cutting and top-cutting pressure-relieving blasting and jam-free hole tamping device for retaining tunnels along the goaf of the utility model, the diameter and length of the gun mud tube 1 can be determined according to the actual situation underground, and the diameter of the gun mud tube 1 matches the diameter of the wooden gun head 3, and the wooden gun head 3 can slide in the gun mud tube 1; the wooden gun head 3 and the bakelite gun stick 6 are treated with chemical agents and need to meet the flame retardant and anti-static requirements underground.

[0022] The use method of the utility model of the deep hole top cutting pressure relief blasting free-stuck hole pounding mud device along the gob retaining lane is:

[0023] When filling the blast hole with gun mud, the gun mud 2 is loaded into the gun mud tube 1 of the gun mud device for tamping the gun mud for deep hole cutting and top pressure relief blasting along the empty lane of the utility model, and then the gun mud tube 1 is sent into the blast hole to be filled, and the bakelite gun stick 6 is pushed. The gun head 3 connected to the bakelite gun stick 6 will push the gun mud 2 into the blast hole and tamp it tightly. After the gun mud blocking is completed, the gun mud tube 1 is pulled, and the gun mud tube 1 and the bakelite gun stick 6 are pulled out of the blast hole together, completing a gun mud hole sealing work, and the device is removed to the next blast hole.

[0024] Example 2

[0025] Similar to Example 1, in Example 2, the deep hole cutting and top-cutting pressure-relieving blasting and jam-free hole tamping gun mud device of the utility model along the goaf-retaining lane of the present invention is also composed of a gun mud tube 1 and a bakelite gun stick 6, and the structure and function of the gun mud tube 1 and the bakelite gun stick 6 are also the same as the structure and function of the gun mud tube 1 and the bakelite gun stick 6 in Example 1.

[0026] Different from Example 1, in Example 2, a pull rope 5 is connected to the outer bottom edge of the gun mud tube 1 in the deep hole cutting and top relief blasting and jam-free hole tamping gun mud device of the utility model, and its function is to facilitate the removal of the gun mud tube 1 from the blasthole after the gun mud filling is completed.

[0027] The pull rope 5 is preferably a steel wire pull rope, which can ensure that it has sufficient strength support and will not break during use.

[0028] Specifically: after the gun mud blocking is completed, the staff can pull the pull rope 5 connected to the gun mud tube 1, and the pull rope 5 will be forced to finally pull the gun mud tube 1 and the bakelite gun stick 6 out of the blast hole, thereby completing a gun mud hole sealing work. The operation is relatively convenient and the efficiency is greatly improved. After that, the gun mud tamping device for deep hole cutting and pressure relief blasting along the empty lane of the utility model can be moved to the next blast hole for the next work.

[0029] Example 3

[0030] Similar to Example 2, in Example 3, the deep hole cutting and top-cutting pressure-relieving blasting and jam-free hole tamping gun mud device of the utility model along the goaf-retaining lane of the present invention is also composed of a gun mud tube 1, a bakelite gun stick 6 and a pull rope 5, and the structure and function of the gun mud tube 1, bakelite gun stick 6 and the pull rope 5 are also the same as the structure and function of the gun mud tube 1, bakelite gun stick 6 and the pull rope 5 in Example 1.

[0031] Different from Example 2, in Example 3, in the device for tamping gun mud for deep hole cutting and top-cutting and pressure-relieving blasting along the goaf-retaining lane of the utility model, a stop pin 4 is provided on the bakelite gun stick 6. When the bakelite gun stick 6 slides, it can be stuck outside the blast hole by relying on the stop pin 4 to prevent the bakelite gun stick 6 and the gun head 3 from falling off from the gun mud tube 1 and falling into the blast hole; a hole is punched on the stop pin 4, and a steel wire rope 5 passes through the stop pin hole to limit the travel of the steel wire rope 5 to prevent the gun mud tube 1 from falling into the blast hole.

[0032] Therefore, the utility model of the deep hole cutting and top relief blasting along the air-retaining lane and the non-stuck hole tamping gun mud device adopts a plug-in method to connect the wooden gun head and the bakelite gun stick with the gun mud tube, which is convenient and fast, does not require disassembly and adjustment, and has low cost. It solves the problem of low efficiency in sealing holes caused by the need for continuous docking of traditional gun sticks, and the size and length can be determined according to the actual situation on site, so it can be used in construction sites under different circumstances.

Claims

1. A deep hole top cutting and pressure relief blasting device for free-stuck hole pounding and mud pounding along gob-side tunnel retention, characterized in that: The invention comprises a gun mud tube (1) and a bakelite gun stick (6); the gun mud tube (1) has an opening at the top for filling gun mud (2) into the gun mud tube (1); the gun mud tube (1) has a hole at the bottom for inserting the bakelite gun stick (6); the bakelite gun stick (6) is a wooden long cylinder with a diameter smaller than the inner diameter of the hole at the bottom of the gun mud tube (1); the top of the bakelite gun stick (6) is connected to a wooden gun head (3); the wooden gun head (3) is a cylinder with a diameter smaller than the inner diameter of the gun mud tube (1) and larger than the inner diameter of the hole at the bottom of the gun mud tube (1); the outer bottom edge of the gun mud tube (1) is connected to a steel wire pull rope (5); the pull rope (5) is a steel wire pull rope; a stop pin (4) is provided on the bakelite gun stick (6); the stop pin (4) is provided with a pin hole, and the pull rope (5) passes through the pin hole.

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