工作面回采对邻近大巷变形影响实测
Field measurement of the influence of coal face mining on adjacent main roadway deformation
【索引】ZHANG Shaohua.Field measurement of the influence of coal face mining on adjacent main roadway deformation[J].Industry and Mine Automation,2019,45(10):33-37
【Reference】ZHANG Shaohua.Field measurement of the influence of coal face mining on adjacent main roadway deformation[J].Industry and Mine Automation,2019,45(10):33-37
【DOI】10.13272/j.issn.1671-251x.2019050025
【作者】 张少华
【Author】 ZHANG Shaohua
【作者机构】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221116
【Unit】State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, China
【摘要】目前大巷围岩控制及其变形理论分析与模拟分析往往对某些现场特殊条件如断层构造进行简化考虑,导致模拟结果与实际结果出现较大差异。针对该问题,以某矿回采工作面为工程背景,采用现场实测方法分析工作面开采后其邻近大巷的变形规律,研究工作面回采对邻近大巷的影响。通过历时3个月共14次巷道变形数据实测及分析,得出结论:受采动影响剧烈区域巷道变形是工作面回采、采动断层活化和交叉应力集中综合影响的结果;随着测点与工作面水平距离逐渐增大,巷道变形速度减小,说明巷道受采动影响逐渐减小;不同测点处巷道左右帮变形速度特征与顶底板类似,顶底板变形明显大于左右帮,说明巷道主要受水平应力影响;在工作面后续推进过程中,在推进至断层交面线附近时应加强巷道围岩变形监测。
【Abstract】At present, theory analysis and simulation analysis of surrounding rock control and deformation of main roadway often simplify some special conditions in the field, such as fault structure, which leads to large differences between simulation results and actual results. In view of the above problem,field measurement method is used to analyze deformation law of adjacent roadway after the coal face is mined, and influence of coal face mining on adjacent roadway is studied taking coal face of a mine as engineering background. Through analysis of roadway deformation data got by 14 measurements over a period of 3 months, the conclusions are obtained: roadway deformation in the area affected by mining is the result of comprehensive influence of working face mining, mining fault activation and cross stress concentration;roadway deformation speed decreases as the horizontal distance between measuring point and coal surface increases gradually, indicating that the influence of mining on roadway decreases gradually; deformation velocity characteristics of left-right sides of the roadway at different measuring points are similar to those of the roof-floor, and the deformation of roof-floor of the roadway is obviously larger than that of the left-right sides, indicating that the roadway is mainly affected by horizontal stress; during subsequent advance process of coal face, deformation monitoring of surrounding rock of the roadway should be strengthened when advancing to vicinity of fault intersection line.
【关键词】 巷道围岩控制; 工作面回采; 邻近大巷; 大巷变形规律; 断层活化
【Keywords】roadway surrounding rock control; coal face mining; adjacent roadway; roadway deformation law; fault activation
【文献出处】工矿qy288千亿国际,2019年10期
【基金】煤炭资源与安全开采国家重点实验室自主课题(SKLCRSM19X003)
【分类号】TD32
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