大跨度切眼分层围岩体协同支护技术研究  

Study on Collaborative Support Technology for Layered Surrounding Rock Mass with Large-span Open-off Cut

作　　者：陈存粮 Chen Cunliang(Tiandi Wangpo Coal Industry Co.,Ltd.,Jincheng,Shanxi 048021)

机构地区：[1]山西天地王坡煤业有限公司,山西晋城048021

出　　处：《江西煤炭科技》2023年第2期53-56,共4页Jiangxi Coal Science & Technology

摘　　要：为保障王坡煤矿分层围岩体开切眼巷道的稳定,以3209切眼掘进支护为背景,采用数值模拟方法探究分层围岩体切眼巷道围岩破坏特征。通过现场调研和理论分析,该巷道围岩属于典型的分层围岩体,开切眼期间顶板围岩表现出破坏范围广、表面变形大、离层严重的矿压特征。依据前述围岩特征,对切眼巷道设计“高强预应力锚杆+锚索+钢筋网+钢带+单体柱”的协同支护方案,验证支护方案的围岩控制效果,结果表明:3209切眼巷道顶底板移近量最大值为169.8 mm,两帮移近量最大值为256.5 mm,巷道围岩整体稳定性良好。In order to ensure the stability of the open-off cut roadway with layered surrounding rock mass in Wangpo Coal Mine,the author explores the surrounding rock failure characteristics in 3209 open-off cut roadway through numerical simulation,determining it is a typical layered surrounding rock mass with the characteristics of wide failure range,large surface deformation and severe layer separation,and proposes the collaborative support scheme with high-strength pre-stress bolt,cable,steel mesh,steel belt and single column,whose field observation results show that the maximum value of the roof and floor movement is 169.8mm,and the two sides is 256.5mm with good overall stability of the surrounding rock.

关 键 词：大跨度切眼 分层围岩体 数值模拟 锚网索联合支护 

分 类 号：TD353.6[矿业工程—矿井建设]