大跨度含夹层软岩巷道支护技术研究  

Investigation into support technology of large-spanned roadway with interlayered soft rock

作　　者：李冬伟[1,2] 李亚楠[1,2] 赵敏[1,2] 张旭庆[1,2] 潘凡[1,2] 

机构地区：[1]中国矿业大学矿业工程学院,江苏徐州221008 [2]煤炭资源与安全开采国家重点实验室,江苏徐州221008

出　　处：《辽宁工程技术大学学报（自然科学版）》2015年第8期881-886,共6页Journal of Liaoning Technical University (Natural Science)

基　　金：中国矿业大学煤炭资源与安全开采国家重点实验室自主研究课题项目(12KF01)

摘　　要：以屯兰煤矿12501工作面回采巷道为工程背景,运用实验室试验、现场实测及数值模拟的方法,研究了巷道顶板岩性及掘巷期间围岩变形规律,并对比分析"锚杆+锚索"和"锚杆+长锚杆"支护条件下巷道围岩应力场及塑性区的特点.研究结果表明:大跨度含夹层软岩巷道顶板岩层岩性和强度较弱,巷道围岩在掘进期间顶底板变形量明显大于两帮移近量,"锚杆+长锚杆"联合支护可以取得明显的维护效果.The large-spanned roadway with intedayered soft rock is characterized by poor stability of the surrounding rocks and significant deformation of the roof strata. Setting the 12501 coalface in Tunlan coal mine as its engineering background, this paper employs laboratory test, field monitoring and numerical simulation to investigate the lithology of the roof strata and the deformation characteristics of the roadway during its excavation, and compares the surrounding rock stress field and plastic zone for one support pattern consist of ＂rock bolt plus anchor cable＂ against that for the other one consist of＂rock bolt plus long rock bolt＂. Results demonstrate that the strength and lithology of the large-spanned roadway with interlayered soft rock is weak and the deformation of the roof and floor far outstrips that of the two ribs during the excavation of the roadway and that the support pattern consist of＂rock bolt plus long rock bolt＂ yields much better effects in controlling the roadway stability.

关 键 词：大跨度 含夹层软岩 回采巷道 FLAC3D 长锚杆 

分 类 号：TD35[矿业工程—矿井建设]