关键词: 冲沟地貌, 浅埋煤层, 间隔式煤柱, 应力分布

Abstract: Based on mining upper seam of shallow buried ultra-close coal seam group with gully landform using interval mining method in Nanliang mine, this paper studies the effect of interval pillars remained in upper coal seams on stress distribution law of lower seams with the combining method of theoretical analysis and numerical simulation. The software RFPA was used to simulate upper seam mining and analyzed stress distribution law of elastic core of pillars in combination with theory of half infinite plane、lithology of roof and floor and mining technology parameters in workface. The stress distribution laws of interval pillars were analyzed. At the same time, the influence of the number of combined coal pillar on stress distribution is analyzed.