Shot hole plugging device for coal mine underground excavation

Abstract

The invention relates to a shot hole plugging device for coal mine underground excavation, and discloses a novel stemming plugging device. The device is capable of improving blasting efficiency of an explosive material, and is capable of conducting dust falling on dust generated during blasting. The shot hole plugging device for coal mine underground excavation is characterized in that one end of a gas collecting tube is placed on one end of an outer sleeve and is communicated with the outer sleeve, the diameter gradually increases from one end of the gas collecting tube to the other end of the gas collecting tube, three arc-shaped grooves are distributed at equal intervals on the outer wall of the other end of the outer sleeve, the arc-shaped grooves form arc-shaped protrusions in the inner wall of the outer sleeve, the diameter gradually increases from one end of the outer sleeve to the other end of the outer sleeve, an outer semisphere shell body is arranged on the other end of the outer sleeve and is communicated with the outer sleeve, the diameter of the outer semisphere shell body is equal to that of the other end of the gas collecting tube, multiple supporting plates are arranged on the outer wall of the outer semisphere shell, installation blocks are arranged among the multiple supporting plates, and screw mounting holes are formed in the installation blocks.

Description

technical field [0001] The invention relates to a blasthole plugging device for underground mining in a coal mine, relates to a novel blasthole plugging device for underground mining, and belongs to the technical field of coal mine blasting. In particular, it relates to a blasthole plugging device which can improve the blasthole plugging effect and can reduce the dust generated by blasting. Background technique [0002] At present, in blast mining, in order to improve the quality and efficiency of blasting, some fillers are inserted into the blast hole to block the gunpowder, thereby increasing the blasting resistance of the blast hole, accumulating compression energy in the blast hole, and increasing the impact force of the shock wave , at the same time, it can also reduce the temperature and pressure when the blasting gas escapes from the working face, so as to ensure the safety of blasting. The existing method of inserting foam mud into the blast hole, because the foam mu...

AI Technical Summary

Problems solved by technology

The existing method of inserting wedge-shaped foam mud plugs into the blast hole to block the foam mud, when there is no pre-compression or resealing without foam mud, the effect of the wedge-shaped foam mud plugs is very small, and the plugging effect is still not good. Well, the blasting efficiency of explosives is low, and the effect will be obvious only when there is pre-loading or foaming mud to seal again, and it is inconvenient to use. Although the expansion screw-shaped mud plug has high reliability, its clogging rate is not high, and it is different from clay Compared with sand blasting mud, the effect is poor

[0005] However, simple liquid or gas blockage can weaken the blasting peak and prolong the action time of the blasting gas. In the process of use, additional water bags need to be filled, which is time-consuming and laborious, and reduces the blasting efficiency.

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