倾斜煤层沿空掘进巷道不对称支护技术  

Asymmetric Supporting Technology Used in the Roadway Driving Along the Empty of Tilted Coal Seam

作　　者：王鹏举[1,2] 周钢[1,2] 邹长磊[1,2] 王浩[1,2] 王超[1,2] 

机构地区：[1]中国矿业大学力学与建筑工程学院,江苏徐州221116 [2]深部岩土力学与地下工程国家重点实验室,江苏徐州221116

出　　处：《金属矿山》2014年第4期70-73,共4页Metal Mine

摘　　要：鉴于现阶段绝大多数巷道采用对称支护方法这一现状,通过理论分析、数值模拟以及物理相似模拟技术揭示巷道围岩的受力状态及变形破坏特征。研究表明倾斜煤层沿空掘进巷道围岩呈明显不对称受力状态及变形破坏特征,巷道断面与岩层倾斜方向成钝角的部位首先产生变形破坏,随后产生连锁反应,巷道的其他部位破坏,最后造成整个巷道的破坏失效。因此常规的对称支护技术不能保证巷道围岩的稳定,针对这一研究结果提出采用非对称的支护技术,在对称支护的基础上对薄弱(关键)位置补充加强支护,防止薄弱(关键)部位的破坏而导致的整个巷道的连锁式破坏,使巷道整个断面的变形趋于协调。在巷道掘进过程中和工作面回采过程中通过现场矿压及围岩变形量的检测分析,锚杆的受力均匀,巷道变形能够满足安全生产要求,表明支护效果较好,对类似条件巷道的支护有借鉴意义。At present, most of the roadway are supported in symmetrical support methods. In view of this situation, the stress, deformation and failure characteristics of roadway surrounding rock were investigated through the theoretical analysis, numerical simulation and the physical analog simulation technique. The research indicated that the surrounding rocks of road- way driving along goat＂ in inclined seam appear as asymmetric state. The obtuse angle positions formed along the cross section of roadway and the rock strata dip are damaged and deformed firstly, and then with a chain reaction generated at other positions, the whole roadway is completely destroyed. Therefore ,the conventional symmetric supporting technology can not guarantee the stability of surrounding rock of roadway. Aimed at the research result, the asymmetric support technology is recommended. On the basis of symmetrical support, the weak （key） positions are additionally supported to prevent the destruction of the whole roadway chain resulted from partial failure. It makes the whole cross section of roadway tend to be coordinated. Field tests on the ground pressure and the deformation of surrounding rock show that the equal stress of the bolt and the roadway deformation can meet the safety requirement. So the roadway supporting performs well and this supporting can be considered as a reference for similar roadway.

关 键 词：倾斜煤层 沿空掘进巷道 关键部位 不对称支护 

分 类 号：TD353[矿业工程—矿井建设]