摘要
通过分析顶板破断类型和复合顶板的特征,得出复合顶板一般在离层挠曲后发生拉伸或剪切破断,对拉伸和剪切破断分别建立力学模型并进行分析,得出岩层破断时的条件;对潞安集团某矿701工作面运输巷的冒顶情况进行分析,得出其顶板为拉伸破断冒落,针对巷道围岩情况提出锚梁网+桁架锚索梁的支护方案,并布置了监测站,通过170天的持续观测,得出巷道变形基本稳定,验证了支护方案的合理性。
By analyzing the type of roof break and the characteristics of composite roof, it is concluded that the composite roof is generally stretched or sheared after the deflection of the layer, and the mechanical model is established and analyzed for the tensile and shear fractures. The roof falling of the 701 working face transportation way in a mine in Lu＇an Group was analyzed, it was found that the roof falling belongs to tensile breaking. The anchor beam net ＋ truss anchor cable beam were proposed for the surrounding rock of the roadway. The protection program and the monitoring station were arranged. Continued observation last for 170 days, and the deformation of the roadway keep stable, and the rationality of the support scheme was verified.
出处
《山西焦煤科技》
2018年第9期16-19,共4页
Shanxi Coking Coal Science & Technology
关键词
复合顶板
冒顶
围岩控制
支护
Composite roof
Roof falling
Surrounding rock control
Support
