近距离煤层高应力巷道支护参数优化研究  

Optimization Study on Support Parameters of High Stress Gateway in Close-Distance Seams

作　　者：张继华[1,2] 王连国[1,2] 胡敏军[1,2] 孙小康[1,2] 朱双双[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]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008

出　　处：《煤炭工程》2014年第6期81-84,共4页Coal Engineering

基　　金：国家重点基础研究发展计划(973计划)项目(2010CB226805);国家自然科学基金项目(51274191)

摘　　要：针对木瓜矿103区段运输巷在回采过程中围岩变形失稳的工程背景,基于矿山压力与岩层控制理论,运用Mathcad和UDEC数学计算软件分析了巷道的受力环境,并对巷道的支护参数进行了优化设计,提出了非对称性支护方案。研究结果表明:木瓜矿103区段运输巷处在近距离上煤层遗留煤柱下方的应力增高区,且巷道两帮所受到的垂直压力具有明显的非对称性(其中右帮为18MPa,左帮为11MPa);根据巷道所处的受力环境和数值模拟结果提出的非对称支护方案,与巷道的受力状况耦合,较原对称支护方案能够显著地减少巷道围岩的变形量。According to the engineering background of the surrounding rock deformation and stability lost in No. 103 sectional transportation roadway of Mugua Mine during the coal mining process, based on the mine pressure and strata control theory, a Mathcad and UDEC mathematical software were applied to analyze the stressed environment of the mine roadway, an optimized design was conducted on the support parameters of the mine roadway and an asymmetry support plan was provided. The study results showed that No. 103 sectional transportation roadway of Mugua Mine was in a stress increased zone under the coal pillar left in the above close distance seam and the vertical pressures on the two sidewalls of the roadway were asymmetry obviously （the pressure on the right sidewall was 18MPa and the pressure on the left sidewall was l lMPa）. Based on the stressed environment of the roadway and the numerical simulation results, the asymmetry support plan was provided, could be coupled with the stressed conditions of the mine roadway and could remarkably reduce the surrounding rock deformation in comparison with the previous symmetry support plan.

关 键 词：近距离煤层 高应力巷道 非对称性 数值建模 支护优化 

分 类 号：TD353[矿业工程—矿井建设]