摘要
为研究支巷高度与硐室间距对巷硐群围岩稳定性影响机制,以某矿北翼运输大巷硐室群为研究背景,分析了支巷开挖对围岩应力扰动规律,提出主巷、支巷高度一致时加强交叉点顶板支护,高度不一致时加强支巷顶板支护的差异化加固方案,并确定了最小硐室间距为6 m。现场实测表明,在锚网索+喷浆协同支护下,围岩深度超过2 m后基本无裂隙发育,支护效果理想。
In order to study the influence mechanism of roadway height and chamber distance on surrounding rock stability of roadway and chamber group, based on the study of the chamber group in the northern wing transportation roadway of a mine, the mechanism of surrounding rock stress disturbance was analyzed, differentiated support program of reinforcement of roof support at intersections when height of main lane and branch lane is same, and strengthening roof support of branch roadways when height is inconsistent was proposed. It is determined that the minimum chamber spacing is 6 m. Field measurements show that the surrounding rock has no fracture development when the depth of the surrounding rock exceeds 2 m, and the supporting effect is ideal.
作者
沙旋
孙文忠
刘志恒
袁永
SHA Xuan;SUN Wenzhong;LIU Zhiheng;YUAN Yong(Shanxi Gaohe Energy Company Limited,Changzhi 047199,China;School of Mines,China University of Mining &Technology, Xuzhou 221116,China;State Key Laboratory of Coal Resources and Safe Mining,Xuzhou 221116,China)
出处
《煤矿安全》
CAS
北大核心
2018年第12期225-228,共4页
Safety in Coal Mines
基金
国家重点研发计划资助项目(2018YFC0604701)
江苏省自然科学基金资助项目(BK20181358)
关键词
大断面硐室
巷道交叉点
硐室支护
围岩稳定性
顶板支护
large section chamber
roadway intersection point
chamber support
stability of surrounding rock
roof support
