Method for forming roadway anti-impact weak structure layer by fracturing coal rock mass through coal rock pulse controllable strong waves

Abstract

The invention discloses a method for forming a roadway anti-impact weak structure layer by fracturing a coal rock mass through coal rock pulse controllable strong waves, and is suitable for the technical field of coal mine underground roadway tunneling and mining safety. A drilling machine is used for drilling a hole in a designated position, water is injected into the drilled hole, high-voltage electric pulse equipment is placed at the designated position, the drilled hole is sealed and fractured, the roadway anti-impact weak structure layer is formed, and energy released by impact mine pressure is absorbed. A steel pipe can protect the high-voltage electric pulse equipment from being smoothly taken out of the drilled hole, and meanwhile the drilled hole is protected from damaging a roadway supporting layer. On the premise that the roadway supporting layer is effectively protected, the energy of the impact mine pressure is effectively absorbed, so that the damage degree of the impactmine pressure to a roadway is weakened, the method has important significance for prevention and treatment of the impact mine pressure, and the pulse controllable strong waves are used for fracturingthe coal body to achieve safety, novelty and practicability of the weak structure layer. The method has wide practicability in the technical field.

Description

technical field [0001] The invention relates to a method for forming a roadway anti-scour weak structure layer, in particular to a method for forming a roadway anti-scour weak structure for coal rock pulse controllable strong wave cracking of coal rock mass in the field of coal mine underground roadway excavation and mining safety technology layer method. Background technique [0002] According to statistics, there have been 178 mines in my country where rock burst (rock burst) has occurred. Rock burst accidents not only occur in deep mines, but also in shallow mines. With the continuous mining of coal resources, rock bursts The number of mine crushing shafts will gradually increase. Once the shock mine crushing occurs, it will cause a great threat to the life of the miners and cause huge losses to the mine. Rock burst is a dynamic phenomenon in which the original mechanical balance of the roadway and working face is destroyed due to the influence of mining during the mining...

AI Technical Summary

Problems solved by technology

Especially in some mines with severe rock burst, although various prevention and control techniques have been adopted, the disaster of rock burst has not been eliminated.

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