高水平应力跨采巷道围岩稳定性模拟研究  

Numerical Simulation of Stability of Surrounding Rock in High Horizontal Stress Roadway Under Overhead Mining

作　　者：李学华[1] 姚强岭[1] 张农[1] 王东禹[1,2] 郑西贵[1] 丁效雷[1] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221008 [2]中国中煤能源集团公司生产技术部,北京100011

出　　处：《采矿与安全工程学报》2008年第4期420-425,共6页Journal of Mining & Safety Engineering

基　　金：国家“十一五”科技支撑计划项目(2006BAK04B02,2006BAK03B06);国家自然科学基金项目(50674085,50774077,50574089)

摘　　要：某矿地应力测试结果表明，水平应力是垂直应力的2．46～2．72倍．受高水平应力、采动、支护等综合因素影响，该矿底板巷道变形严重，巷道返修2～3次仍难以满足生产要求，影响了矿井的正常生产秩序．针对该矿底板巷道工程地质特点，通过数值模拟手段研究了高水平应力条件下底板巷道在采动过程中围岩位移场与应力场分布的形态，得出该类巷道肩角处是首先发生破坏的弱结构部位，即影响围岩稳定性的关键部位．因此提高弱结构部位的强度，从而使支护与围岩共同作用形成有效承栽结构，是治理高水平应力跨采巷道的主要技术途径．结合受上部煤层开采影响中三石门工程，提出了在关键部位采取非均匀支护技术体系并进行了现场实践．结果表明，该技术有效控制了巷道围岩变形量，为矿井的安全生产创造了条件，取得良好技术经济效益．The ground stress test of a certain coal mine shows that the horizontal stress is 2.46 ～2.72 times of the vertical stress. Affected by high horizontal stress, mining, and support, floor roadways had a large deformation. Being repaired for 2～3 times, the roadways could not meet the requirement of production, seriously affecting the normal coal production. Aiming at the engineering geological characteristics of floor roadways, we studied the distribution of surrounding rock stress and displacement fields in high horizontal stress roadway crossing mining face, indicating that the humeral of roadway is the original destructive position. So, to improve the mechanical strength of weak structure in surrounding rocks so as to make the supports and surrounding rocks form an effective bearing structure is the main technical way for roadway under overhead mining. Based on the situation that exploiting upper coal seam may affect the middle-3 crosscut, we suggested that a non-uniform support technique system be used. The practice indicates that this technique has effectively controlled the deformation of surrounding rocks, which provides a good condition for safety production in this coal mine.

关 键 词：跨采巷道 高水平应力 非均匀支护 

分 类 号：TD322[矿业工程—矿井建设]