关键词: 深部矿井, 宽条带法开采, 煤柱稳定性, 地表移动特征

Abstract: Coal pillar stability and surface movement characteristics of wide strip pillar mining in deep mine have been researched by using field measurement, three-dimensional similar material simulation, numerical simulation and theoretical analysis. Researches show that under the mining conditions of deep mine, the width of plastic zone becomes larger significantly and load bearing above the whole coal pillar in deep mine is saddle-shaped; The lateral deformation is discontinuous, stepped and mutational, which is focused on the edge 9.5 m away from the coal wall. With the diminution of coal pillar’s width, the width of plastic zone increases notably. In addition, surface subsidence reaches extremum under this geological and mining condition in group strip coal pillar mining. The subsidence basin is larger but gentler and uniform. The subsidence coefficient is 0.22 and the movement and deformation is continuous and long-term. Outer edge of subsidence basin appears surface rebound. Based on the characteristics of deep wide strip pillar mining, the dimensional design method has been put forward．

Key words: deep mine, wide strip pillar mining, coal pillar stability, surface movement characteristics