关键词: 中厚煤层, 窄小煤柱, 支承压力, 沿空掘巷, 回采率

Abstract: Abstract: With the increase of mining depth in the mine, the influence of section pillar support pressure and mining pressure on the return air drift of the coal mining face is getting larger and larger, and the maintenance quantity and cost of the drift increase. Based on the practice of roadway driving along goaf with narrow coal pillar in Renjiazhuang coal mine, this paper concludes that roadway driving along goaf with narrow coal pillar can not only change the stress condition of roadway, improve the use and maintenance conditions of roadway, but also improve the recovery rate of mining area, which has universal popularization significance.