Outburst coal seam floor pitch-up through-bed directional hole leading area shield coal roadway driving method

Abstract

The invention provides an outburst coal seam floor pitch-up through-bed directional hole leading area shield coal roadway driving method. The method comprises the steps that 1, a plurality of drill sites are prepared in a bottom roadway below a coal roadway to be excavated of a working coal seam; 2, change conditions of a coal seam and conditions of hidden geologic anomalous bodies in an influence area of the coal roadway to be excavated are ascertained through pitch-up through-bed directional holes of construction floors of the drill sites, a gas extraction pipe is mounted to pre-exhaust gas in the coal seam in advance, an airtight sampling device is used for conducting sampling inspection on the gas extraction effect, and if the residual gas content of the coal seam is less than or equal to 8 m<3>/t or the gas pressure of the coal seam is less than or equal to 0.74 MPa, extraction is stopped; and 3, coal roadway driving is carried out according to the ascertained change conditions of the coal seam and the ascertained conditions of the hidden geologic anomalous bodies. Thus, the work quantity of geophysical exploration, the drilling work quantity and the work quantity of bed plate tunnel driving in the prior art are reduced, the construction cycle, the exploration cycle and the gas extraction standard control cycle are shortened, and it is guaranteed that outburst coal seam coal roadway driving is carried out safely and efficiently.

Description

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AI Technical Summary

Benefits of technology

This patented design allows for better detection and extraction of gases from underground areas without requiring expensive equipment or human labor.

Problems solved by technology

This patented describes various techniques that have been developed over time by companies involved in producing energy from an explosion or accident involving highly dangerous materials such as coal deposits. These issues include gas accumulation during tunnel digging due to poor air quality conditions caused by rapid changes between normal pressure and low pressures within the surrounding environment (excluding rain), limited accessibility when accessing areas near existing roads, difficulty in detecting emergency situations, and difficulties associated with constructing temporary structures around these locations. Current solutions involve either slowdown workface operations or expensive equipment installation costs. Therefore, there exists a challenge towards developing efficient and effective ways to improve the efficiency and effectiveness of gas extraction processes while minimizing environmental impact on workers who use them.

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