“三软”煤层沿空掘巷围岩力学环境及支护体承载性能分析

Analysis of Surrounding Rock Mechanical Environment and Supporting Body Bearing Performance of Roadway Driving Along Goaf in the"Three Soft"Coal Seam

为应对"三软"煤层综放沿空掘巷围岩稳定性差的问题,通过数值模拟分析、揭示"三软"煤层中锚杆、锚索载荷变化规律及其与围岩变形相互作用关系,为"三软"煤层沿空掘巷锚网支护参数优化提供理论依据,改善了巷道支护状况,降低相邻工作面间保护煤柱压煤率,提高矿井经济效益和社会效益。

In order to deal with the problem of poor surrounding rock stability of roadway driving along goaf in fully mechanized top coal caving in the"three soft"coal seam,the load variation law of bolt and anchor cable in the"three soft"coal seam and their interaction with surrounding rock deformation are revealed through numerical simulation analysis.The purpose of this paper is to provide a theoretical basis for the optimization of bolt and wire mesh support parameters of roadway driving along goaf in the"three soft"coal seam,improve the supporting condition of roadway,reduce the coal pressing rate of protective coal pillar between adjacent working faces,and improve the economic and social benefits of the mine.