Special mining suction drill for coal mine

Abstract

The invention relates to a special suction drill for coal mines, comprising a drill rod, a drill bit, an electric motor and a fixing bracket, wherein the drill rod is tubular; one end of the drill rod is provided an opening at the inner side of the drill bit, and an opening at the other end of the drill rod is communicated with an exhaust chamber; and an exhaust motor and an air outlet are arranged on the exhaust chamber. The suction drill related by the invention sucks air through a hole in the middle of the drill bit, so that the slag at the inner wall of a drilled hole can be effectively sucked from the hole in the middle of the drill bit and then discharged by the drill rod; the inner hole of the drill rod is smooth, and air suction enables airflow at the outer side of the drill rod to be even, therefore the drilling cannot be stuck and blocked. Multistage filter elements are sleeved in a cavity at the drill bit, so that dust can be sucked out without blocking the drilled hole; simultaneously, the multistage filter elements in the invention are assembled, disassembled and exchanged very conveniently.

Description

technical field [0001] The invention relates to an auxiliary tool for mining coal mines, in particular to a special air suction drill for coal mines. Background technique [0002] Because gas threatens the safety of coal mining, it is an important link before coal mining to pump out the gas in the coal seam from the wall of the coal mine's ascending and descending roadway. For some soft coal seams, only the dry method can be used for drilling, and compressed air is used to blow dust, so that the coal powder and compressed air generated during drilling are sprayed out along the gap between the drill pipe and the hole wall. Although the dust blowing gas flow rate is small and large, the compressed air has a large energy, and the formed airflow has a strong impact force, and the dust content is as high as 3000mg / m 3 , leading to a very bad environment at the working face, which seriously threatens the health of the workers. Due to the lax management of the coal mine and the mi...

AI Technical Summary

Problems solved by technology

In order to improve the serious environmental pollution problem in dry drilling, the current method is to install the hole dust collector of the drill pipe casing at the hole of the dry drilling, the small casing goes deep into the coal seam, and the large casing is close to the wall of the roadway. The blowing dust of compressed air is sprayed out along the gap between the sliding drill pipe and the small casing into the large casing, and the dust is sprayed in the large casing to reduce the dust. The dust removal efficiency is between 50% and 60%. Although the dust reduction effect is obvious, it is difficult to achieve environmental sanitation standard

At present, there are other forms of process equipment for orifice dust removal, such as multi-stage non-powered orifice dust collector (200920032546. Difficult to carry and difficult to adapt to the needs of frequent replacement of drilling positions

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