沿空留巷充填体参数确定与支护方法研究

Study on the Determination of Filling Body Parameters and Support Methods for Retaining Roadway Along Goaf

为解决缓倾斜厚煤层沿空巷道稳定性问题,采用数值模拟法确定了沿空留巷巷旁充填体合理宽度为1.5 m、强度20 MPa,设计锚杆(索)加密补强永久支护与“挂设护顶挡矸金属网+打设切顶迈棚木支柱+单体支柱”临时支护方法。对支护后巷道变形进行的监测表明,沿空巷道整体变形量较小,保障了沿空巷道的稳定。

In order to solve the stability problem of the roadway along goaf in the gently inclined thick coal seam,a numerical simulation method is used to determine the reasonable width of the filling body next to the retaining roadway along goaf,which is 1.5 m and has a strength of 20 MPa.Permanent support and"hanging top protection and block gangue metal mesh+setting up wooden pillars for cutting roofs and walking sheds+single pillar"temporary support method are designed with anchor rods(cables)for reinforcement.Monitoring of the deformation of the roadway after support showed that the overall deformation amount of the retaining roadway along goaf is relatively small,which ensures the stability of the roadway along goaf.