近距离煤层采空区覆岩裂隙演化规律研究
Research on Evolution Law of Overlying Rock Fractures in Goaf of Close Range Coal Seams
郭晓龙1
作者信息
- 1. 山西煤炭运销集团三元古韩荆宝煤业有限公司,山西长治 046200
- 折叠
摘要
矿井井田及周边巷道、采空区分布等导致地质条件复杂,给矿井安全生产带来不稳定因素.针对上述问题,采用理论建模方法建立采空区顶板力学模型,推导解析顶板弯曲下沉挠度函数,运用数值模拟软件模拟研究采空区覆岩裂隙演化规律.在实际煤矿井下进行钻孔探测,结果表明,覆岩层裂隙发育高度为 1.3～3.4 m,覆岩出现损伤但影响范围较小,煤层之间稳定岩层的最小厚度为12.2 m,裂隙具有完整性和一定的承载能力.
Abstract
The complex geological conditions caused by the distribution of mining fields,surrounding tunnels,and goaf areas pose unstable factors to the safety production of the mine.In response to the above issues,a theoretical modeling method is adopted to establish a mechanical model of the goaf roof,derive and analyze the deflection function of the roof bending and sinking,and use numerical simulation software to simulate and study the evolution law of overlying rock fractures in the goaf.Drilling exploration was conducted in actual coal mines,and the results showed that the development height of cracks in the overlying strata was between 1.3～3.4 m.The overlying strata were damaged but had a small impact range.The minimum thickness of stable rock layers between coal seams was 12.2 m,and the cracks had integrity and certain bearing capacity.
关键词
煤层采空区/覆岩裂隙/演化规律/钻孔探测Key words
coal seam goaf/overlying rock fractures/evolution law/drilling detection引用本文复制引用
出版年
2024
NETL
NSTL
万方数据