欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
针对急倾斜软硬互层巷道围岩大变形控制难题，采用现场试验、理论分析和数值仿真等多种手段，研究急倾斜巷道围岩变形破坏机制，研究结果表明：急倾斜软硬互层巷道的变形与破坏具有非对称性，偏压作用明显，呈现顶板下滑，底板臌起的相互错动变形特征，底臌严重且易片帮冒顶。巷道断面与岩层倾斜方向的钝角部位受侧向约束小，因而剪切滑移变形较大，是产生非对称变形破坏的关键部位；下帮围岩变形破坏较上帮更为严重。基于急倾斜巷道的变形破坏特点，提出在锚-网-索耦合支护的基础上利用锚索、底角锚杆等对产生差异变形破坏的关键部位进行加强支护的方法，巷道大变形得到了有效控制。
英文摘要：
Aimed at solving the large deformation control problems of surrounding rock masses of steeply inclined roadway in soft-hard alternate strata, field tests, theoretical analysis and numerical simulation and other research methods were applied to analyze the mechanism of deformation and damage for steeply inclined roadway surrounding rock masses under typical condition of alternate strata. The results show the asymmetric deformation characteristic of surrounding rock of steeply inclined roadway in soft-hard alternate strata, evident effect of unsymmetrical pressure, the mutual miss movement deformation features of“roof sliding and floor heave”, obvious floor heave and high possibility of wall caving and roof collapse. The deformation failure was significantly influenced by an obtuse angle region between roadway sections and incline directions of rock strata, which is less confined, ending up with more shear strain. Deformation and failure of lower wall rock mass aggravated compared to the upper wall rock mass. Based on the deformation and failure characteristics of steeply inclined roadway, according to the strategy of asymmetric coupling support, the key position of surrounding rock that may produce deformation discrepancy was reinforced by anchor cable and floor bolt after bolt-net-anchor coupling support and the large deformation of roadway was effectively controlled.
同期刊论文项目
同项目期刊论文
期刊信息
位置：