深部软岩井底车场巷道变形破坏机理及耦合控制对策研究

Deformation mechanism of deep soft rock roadway in shaft bottom and its coupling control strategy

鹤岗矿区兴安矿是我国典型的软岩矿井,随着开采深度的增加,井底车场巷道变形破坏严重,重车线顶板冒落高度达8.6 m,经多次返修仍未稳定,造成极大安全隐患。通过室内试验、现场测试和数值模拟计算等方法分析了典型巷道的变形破坏特征,总结了高冒区变形破坏机理和主控因素,提出基于施工过程优化的上下双硐室稳定性控制对策。现场应用效果良好,为大变形软岩巷道的支护提供了方法。

In Xing＇an coal mine of Hegang mining area, a typical soft rock mine, with the increase of mining depth, the deformation of the roadway was more and more severe in shaft bottom and the roof fall height of heavy vehicle roadway reached 8.6 m. The roadway was not stable after repeated repairs and became a threat to mining safety. The deformation characteristics of typical roadway was analyzed, and the mechanism of destruction and failure in the top-caving area and its main controlling factors were summarized through such computation methods as laboratory test, field investigation, and nu- merical simulation. In this paper, the coupling control strategy with upper and lower chambers was pro- posed based on the optimization of construction process and the method is well applied in field. The paper provides a method for roadway support of large deformation soft rock.