交叉巷道大跨度顶板减跨控制研究  

Study on span reduction control of large span roof slabs in crossover tunnels

作　　者：李岩 LI Yan(Technology Centre of Shanxi Fenxi Mining Group,Jinzhong 031599,China)

机构地区：[1]山西汾西矿业集团技术中心,山西晋中031599

出　　处：《煤炭科技》2022年第5期127-131,共5页Coal Science & Technology Magazine

基　　金：中国矿业大学未来科学家计划资助(2022WLJCRCZL012)。

摘　　要：对于巷道交叉口处跨度大幅增加、顶板控制困难等问题,以某矿巷道交叉口为工程背景,采用理论分析的方法建立巷道顶板力学模型,并结合数值模拟软件探究了巷道交叉口处围岩应力应变关系,得出大跨度巷道顶板最大应力情况。模拟结果表明,原支护方案下交叉口巷道顶板最大下沉量480 mm,顶板破坏深度大、范围广。针对此,提出交叉巷道大跨度顶板减跨控制技术并开展工业性试验。技术应用结果表明,顶板最大下沉量为248 mm,交叉巷道顶板大变形问题得到有效控制。For the problems of greatly increasing the span and difficult roof control at the roadway intersection,taking the roadway intersection of a mine as the engineering background,this paper establishes the roadway roof mechanical model by using the method of theoretical analysis,obtains the maximum stress of the long-span roadway roof,and explores the stress-strain relationship of the surrounding rock at the roadway intersection combined with the numerical simulation software.The simulation results show that the maximum roof subsidence of intersection roadway under the original support scheme is 480mm,and the roof failure depth is large and the range is wide.The span reduction control technology of long-span roof in cross roadway is put forward,and the industrial test is carried out.The final maximum subsidence of roof is about 248 mm.

关 键 词：交叉巷道 围岩控制 大跨度 数值模拟 垂直应力 

分 类 号：TD353[矿业工程—矿井建设]