山西某矿软弱复合顶板巷道围岩支护技术研究

Study on Surrounding Rock Rupport Technology of Roadway under The Condition of Soft Composite Roof in A Mine in Shanxi Province

为解决软弱复合顶板巷道在垂直应力和水平应力的作用下发生滑动,出现破碎、离层等现象,分析了软弱复合顶板巷道掘进后的应力分布特征,在两帮出现垂直应力集中现象的情况下水平应力整体呈层状分布,顶板岩层易出现岩层间的移动现象,且水平应力集中上覆炭质泥岩处。研究提出的支护方案在现场应用效果良好,为后续巷道掘进提供了参考。

In order to solve the problems of sliding, breaking and separation of roadways with the action of vertical stress and horizontal stress under the condition of soft composite roof, the stress distribution characteristics of roadways after tunneling under the condition of soft composite roof are analyzed. The vertical stress concentration phenomenon appears on both sides. The horizontal stress is distributed in layers as a whole. The roof strata are prone to move between strata, and the horizontal stress is concentrated in the upper carbonaceous mudstone. The support scheme put forward in the study has a good effect in the field application, which provides a reference for the subsequent roadway excavation.