近浅埋煤层大采高工作面回采巷道护巷煤柱合理宽度研究

Research on Rational Width of Chain Coal-pillar in Large Mining Height Workface Recovery Roadway of Shallow Coal Seam

为研究近浅埋煤层大采高工作面合理护巷煤柱的留设问题,以和善煤矿5103工作面回采巷道为研究对象,通过理论计算和数值模拟分析,得出了合理的护巷煤柱宽度为25 m。现场应用后实测回采巷道顶底和两帮移近量均为35 mm左右,从而论证了其可行性。

For studying the problem of rational width of chain coal-pillar in large mining height working face recovery roadway of shallow coal seam,taking the recovery roadway of 5103 working face in Heshan Mine as research object,through theoretical calculation and numerical simulation,rational width of chain coal-pillar is 25 m.The roof and floor and two-side deformation are both 35 mm through engineering practice,and its feasibility is demonstrated.