Automatic collecting device and method for gas emitted in water-jetting boring

Abstract

An automatic collecting device for gas emitted in water-jetting boring comprises a gas sensor positioned in a roadway, a signal processing control device, a gas collecting hood and a drainage hose for connection; the gas collecting hood is fixed to the sidewall or top of the roadway, the gas sensor is arranged at an opening of a borehole, a collecting port of the gas collecting hood is adjacent to and oriented to the opening of the borehole, a connection branch pipe is fixedly communicated with a mine drainage pipeline, the gas collecting hood is connected with the connection branch pipe through the drainage hose, the connection branch pipe is provided with an electromagnetic valve, the electromagnetic valve is connected with the signal processing control device, an infrared transmitter is arranged in the gas sensor, and an infrared receiver is arranged in the signal processing control device; the gas collecting hood is made of aluminum alloy, and the diameter of the drainage hose is greater than or equal to 140 mm. The invention also discloses an automatic collecting method for gas emitted in water-jetting boring. The automatic collecting device and method for gas emitted in water-jetting boring are good in safety and reliability, allow gas emitted in water-jetting boring to be collected timely and effectively, and prevent local gas collection in the roadway to avoid potential safety hazards.

Description

technical field [0001] The invention belongs to the field of prevention and control of gas disasters in coal mines, and relates to an automatic trapping device and method for gas ejected by hydraulic punching, which can prevent local gas accumulation caused by gas ejection during hydraulic punching. Background technique [0002] Hydraulic punching technology is one of the most widely used technical measures to relieve pressure, increase permeability and strengthen outburst prevention, and has achieved good gas disaster prevention and control effects in soft and low-permeability coal seams. In the process of hydraulic punching, since the outburst coal seam usually has the nature of self-injection, when the high-pressure water hits the coal body, small and controllable coal and gas outbursts will be induced. When strong jet holes appear, a large amount of gas will flow directly into the roadway, and sometimes even cause the gas concentration near the perforated drilling site t...

AI Technical Summary

Problems solved by technology

When strong jet holes appear, a large amount of gas will flow directly into the roadway, and sometimes even cause the gas concentration near the perforated drilling site to exceed the limit, posing a threat to the safety of coal mine production. Therefore, it is urgent to solve the problem of gas exceeding the limit once strong jet holes appear. question

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