双重采动影响下复采煤层巷道稳定性分析与维护方案设计  

SUPPORT DESIGN OF THE STOPING ROADWAY IN THE RE-MINED COAL SEAM UNDER INFLUENCE OF DUAL MINING

作　　者：张大明[1] 孙贵洋 李刚[1] ZHANG Daming;SUN Guiyang;LI Gang(College of Mining Engineering,Liaoning Technical University,Fuxin 123000,China)

机构地区：[1]辽宁工程技术大学矿业学院,阜新123000

出　　处：《工程地质学报》2021年第4期1028-1036,共9页Journal of Engineering Geology

基　　金：采动应力扰动下承压底板水岩耦合损伤致裂机理研究(资助号:51774165)。

摘　　要：为了解决薛虎沟煤矿复采煤层回采巷道受双重采动影响下的支护问题,经现场观测,部分巷道顶板存在上部空巷与煤体并存现象,增加了支护难度。通过理论分析和数值模拟的方法对2-106A2巷道在双重采动影响下围岩稳定进行了受力状态分析,并对原支护方案进行了校验,结果表明原支护方案不能满足此条件下的巷道稳定,需要对巷道顶板和右帮(2-106B工作面侧)采取补强支护。利用数值模拟的方法对2-106A2巷道采取补强支护方案后的围岩稳定性进行了分析,模拟结果表明所设计的补强方案合理。另外,在现场采用十字布点法对2-106A2巷道受双重采动影响230 m这段巷道进行了围岩变形量观测,巷道顶板下沉最大量195 mm,左、右两帮移近量分别为124 mm、265 mm,巷道顶板破碎区变形得到了很好的控制,实现了工作面的安全高效回采。This paper aims to solve the support problem of the mining roadway in the re-mined coal seam under the influence of double mining in Xuehugou Coal Mine.After field observation,the upper part of the roadway roof has the coexistence of the upper empty roadway and the coal body,which increases the difficulty of support.Through theoretical analysis and numerical simulation,the surrounding rock stability of 2-106A2 roadway is analyzed under the influence of dual mining.The original support plan is verified.The results show that the original support scheme cannot meet the stability of the roadway under this condition.The roof and the right side of the roadway are needed to be reinforced.We use numerical simulation method to analyze the stability of surrounding rock after adopting reinforcement support plan for 2-106A2 roadway.The simulation results show that the designed reinforcement plan is reasonable.In addition,the cross-point method is used to observe the deformation of surrounding rock in the 230 m section of the 2-106A2 roadway affected by the dual mining.The maximum sinking amount of the roof of the roadway is 195 mm,and the moving distances of the left and right sides are 124 mm and 265 mm respectively.The deformation of the broken zone of the roof of the roadway is well controlled,realizing safe and efficient mining of the working face.

关 键 词：复采煤层 数值模拟 双重采动影响 稳定性分析 补强支护 

分 类 号：TD12[矿业工程—矿山地质测量]