大埋深向斜轴部泥岩巷道复合支护方式应用研究

以位于向斜轴部附近的陈四楼煤矿九采区胶带下山1号联络巷为工程对象,在介绍其工程地质条件的基础上,分析原岩应力、断层、向斜构造、围岩条件对其变形破坏的影响,针对各影响因素并借鉴以往经验,提出"先喷后锚+锚网索+U型钢棚+注浆"的复合支护方案,设计与之配套的施工工艺流程,确保支护质量,并进行矿压观测.矿压观测分析表明,复合...

Study on application of composite supporting method in axial mudstone roadway of syncline with large buried depth

Based on the introduction of the engineering geological conditions，this paper analyzes the influence of the original rock stress，fault，syncline structure and surrounding rock conditions on the deformation and failure of the No.1 connecting roadway of belt downhill in No.9 mining area of Chensilou Coal Mine，which is located near the syncline axis.According to the influence factors and the previous experience，the composite supporting scheme of "shotcreting before anchoring + Anchor Mesh Cable + U-shaped steel shed + grouting" is put forward，and the supporting construction process is designed to ensure the support quality and conduct mine pressure observation.The mine pressure observation and analysis show that the composite support scheme and process flow can meet the support requirements of No.1 connecting roadway in No.9 mining area.