Research on Gas Drainage Roadway Layout for Outburst Coal Seam Floor Rock

Regional pre-pumping must be done before mining in outburst coal seam, only after the residual gas pressure and gas content decreased to 0.74 MPa and 8 m³/t below, it could begin mining. Taking 32206 working face of Shanxi Shangliang Coal Mine as the background, it studied and analyzed the distribution of floor rock pre-pumping roadway in outburst coal seam group. With the numerical simulation of the software RFPA, it found out the new stress distribution after the outburst coal seam mining, which should be the location of small stress impact and closest to the next coal seam. It made sure that the maintenance of roadway was easy and the construction distance of pre-pumping drilling could be short so as to save time and money.