Coal mine gas extraction deep hole pre-splitting blasting permeability increasing device and method thereof

Abstract

The invention relates to a coal mine gas extraction deep hole pre-splitting blasting permeability increasing device and a method thereof. The device comprises a plurality of detonating nipples; the adjacent detonating nipples are detachably connected through connecting mechanisms; each connecting mechanism comprises an end A and an end B; each end A is provided with an assembly cavity and a detonating pipe; each detonating nipple comprises a blasting cylinder, a blasting chamber and a blasting leg wire set; the blasting cylinders are provided with inner cavities; the blasting chambers are formed in the inner cavities of the blasting cylinders; the assembly cavities, the detonating pipes, the blasting cylinders and the blasting chambers are all located on the same axis correspondingly; and blasting leg wire sets comprise first blasting leg wires and second blasting leg wires which are symmetrically arranged and connected with the ends A and the ends B correspondingly. A working face of an extraction operation area is fully utilized, gas is extracted comprehensively and efficiently, through forming of extraction drilled holes and pre-splitting blasting drilled holes and assisting of blasting explosives, the permeability of a coal seam can be well improved, the completeness of gas treatment is improved, the safety of coal mine exploiting is improved, and the effect and efficiency of gas extraction can be improved.

Description

technical field [0001] The invention belongs to the technical field of coal mine gas drainage, and in particular relates to a coal mine gas drainage deep hole pre-splitting blasting anti-reflection device and a method thereof. Background technique [0002] With the increase of coal mining depth, the amount of gas emission also increases, and the number of high-gas mines increases, especially in coal mines with poor coal seam permeability and strong gas adsorption, which makes it difficult to carry out gas extraction, and it is difficult to achieve the national gas control "16 The core standard of "drainage up to standard" in the "Word Policy" poses a huge threat to the safe production of coal in my country and seriously restricts the sustainable development of the coal industry. Strengthening coal seam fissures, improving coal seam gas permeability, and then enhancing the freeness of gas in coal seams is a method to solve the "drainage difficulty" in theory. In order to achi...

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Problems solved by technology

[0003] Aiming at the deficiencies in the prior art, the present invention provides a deep-hole pre-splitting blasting anti-reflection device and method for coal mine gas drainage, which has simple structure, convenient processing, and flexible operation, and can effectively solve the problem of comprehensive prevention and utilization of coal mine gas. Greatly improve the gas drainage efficiency of the existing gas drainage system in coal mines

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