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Question:

What are the signs of coal and gas outburst?

What are the signs of coal and gas outburst?

Answer:

In the process of underground mining, coal and rock is often a moment from coal and gas spewed out, the phenomenon that the coal and gas outburst, referred to as "outstanding". Coal and gas outburst accident will not only cause the working face and ventilation system damage, while a large number of coal and gas to discharge at high speed that may also be full of roadway, causing suffocation and burning gas explosion, and coal (rock) embedded in the accident.
After the staff found that the above signs, should immediately report to the relevant departments to take timely measures, when the situation is serious, should immediately stop the work, the rapid withdrawal of the windIn recent years, due to the attention of Party and country and the vast majority of scientific and technical personnel to take a lot of coal mine safety protection measures, such as Shimen exposed seam mining face on vibration shot, long shot, a shelter, compressed air self-help system and wear isolated self rescuer, these measures have certain effect on coal and gas outburst prevention plays.
Before coal and gas outburst, there is usually a sign, and there is no sign of the very fewSound sign: a seam splitting sound, the sound of muffled thunder, machine guns, guns and coal gas through the water ring cracks squeak. The sound from far to near, from small to large, short, continuous, interval is not consistent; vibration and impact the coal wall roof pressure, also. A stent fracture.Silent sign: the roof pressure, coal wall spalling by extrusion, the dregs, along the roof or floor muster; coal seam coal bedding disorder, dull, soft coal; gas flickering, coal wall cold, drilling with top drilling, sticking and spraying gas and so on.

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