摘要
分析了大同某煤矿1070辅助运输大巷传统锚杆锚索支护下的矩形巷道,分析表明传统支护体系下的矩形巷道屈服破坏范围大,顶底板和两帮位移量大,传统锚杆锚索支护不适应其巷道的条件,不能有效控制围岩变形,支护效果不理想,严重影响巷道安全。故对巷道提出新的断面形状和支护方案。通过半年多的实践证明,新的设计和支护形式是可靠的,有效地保证了石炭二叠纪特厚煤层巷道的安全运行。
The rectangular roadways supported by traditional bolt-anchor in No.1070 auxiliary transporting alley was analyzed in the paper. The result showed that, under the traditional supporting system,the yield failure range of the rectangular roadways and the disposition of roof-floor and two sides were huge, therefore the traditional bolt-anchor support could not fit the roadway condition and could not control the deformation of surrounding rocks effectively. Without ideal effects, the support threatened the roadway safety seriously. Therefore, new section shape and supporting plan were proposed. After half-year practice, the new design was proved to be reliable, which effectively guaranteed the safety operation of the roadways in the extra-thick Permo Carboniferous period coal seam.
出处
《山西煤炭》
2013年第11期67-68,78,共3页
Shanxi Coal
关键词
数值模拟
巷道
围岩变形
特厚煤层
numerical simulation
roadways
surrounding rock deformation
extra-thick coal seam
