ABSTRACT
The study of gas pressure distribution and formation mechanism in the leading area of the working face under the influence of mining is of great significance to gas management and extraction. The internal relation between gas pressure and support pressure is analyzed using the data of the pressure test in a support pressure area of a mine face in Henan province and the data of gas pressure analysis in coal seam drilling. The results show that the gas pressure of coal is closely related to the support pressure in the advanced area of the coal wall. The support pressure causes the gap of coal to decrease and the gas pressure increases, otherwise the gas pressure decreases. Based on the distribution of supporting pressure, the gas pressure distribution of coal in the advanced area of the coal wall is divided into the decompression zone, supercharging zone, and stabilizing zone.
