极近距离立体交叉巷道交错段围岩控制与支护技术  

Discussion on surrounding rock control and support technology for the crossing part of ultra-close interchange roadway

作　　者：陈善昌 CHEN Shan-chang(Nanyangpo Branch of China Coal No.1 Construction Company,Shuozhou 036000,China)

机构地区：[1]中煤一建南阳坡分公司,山西朔州036000

出　　处：《煤炭工程》2018年第10期19-24,共6页Coal Engineering

摘　　要：针对极近距离的空间立体交叉巷道交错段的围岩控制,根据自稳隐形拱理论对上方巷道掘进对其下伏巷道造成的影响进行了理论分析,分析认为:当上方巷道在其下伏巷道的自稳隐形拱范围内掘进时,并不会对其下伏巷道顶板造成应力集中现象,而只会增加其下伏巷道自稳隐形拱的高度,从而造成下伏巷道顶板压力的增大。同时,减小上方巷道的跨度能够有效减小其下伏巷道的顶板压力,从而有利于其下伏巷道的顶板稳定性控制。并以南阳坡煤矿极近距离立体交叉巷道为工程背景,计算了上方巷道掘进时其下伏巷道的顶板压力,对掘进通过下伏巷道时进行了数值模拟,以此为依据对立体交叉巷道的交错点的下伏巷道支护进行了优化设计,在上方巷道掘进的过程中保证了下伏巷道的稳定性,为类似工程提供了借鉴意义。The stress distribution of roadway becomes extremely complex at the roadway intersection. Aiming at the surrounding rock control at the intersection of close space-crossing roadway,based on the theory of self-stabilized hidden arch,theoretical analysis was carried out on the influences of the upper roadway excavation on the lower roadway. The theoretical results show that,when the upper roadway excavation is in the range of the self-stabilized hidden arch of the lower roadway,the stress of the lower roadway roof surrounding rock will not concentrate, but the upper roadway excavation will enlarge the range of the self-stabilized hidden arch of the lower roadway which results in an increasing pressure on the lower roadway roof. Meanwhile,decreasing the span of the upper roadway can reduce the lower roadway roof pressure,which is conducive for the roof surrounding rock control. According to the theoretical results,with the engineering background of the close space-crossing roadway in Nanyangpo Coal Mine,the lower roadway roof pressure during the upper roadway excavating was calculated,and the situation was simulated when the upper roadway excavating pass above the lower roadway. Based on the above research,the support of the intersection of close space-crossing roadway design was optimized.

关 键 词：极近距离 交叉巷道 围岩控制 支护技术 自稳隐形拱 

分 类 号：TD353.5[矿业工程—矿井建设]