摘要
为解决水库坝体下开采安全性,提高煤炭资源回收率,以王洼煤矿水库坝体下110505工作面为研究背景,通过物理仿真模拟、数值模拟及理论分析等方法对覆岩裂隙发育规律及导水裂隙带高度展开研究。为避免矿井开采对地表水坝与水体破坏,针对导水裂隙带高度分析结果,提出了110505工作面限高开采方案。结果表明:工作面开采后地表形成“凹”型盆地,并产生拉伸裂隙,致使地表水位下降78%;现场实测导水裂隙高度为170.76 m,物理仿真模拟试验、数值计算、传统经验公式得出三者的导水裂隙带高度分别为162,164 m和120.57 m;方差修正系数对经验公式做出修正后,反推出限高开采的安全开采高度为2.6 m。研究揭示了工作面覆岩导水裂隙带高度发育规律及水库水体受采动影响的规律,为王洼煤矿后续此类条件下安全措施的制定提供了依据。
In order to improve the safety of mining under the reservoir dam and improve the recovery rate of coal resources,110505 working face under the reservoir dam of the Wangwa coal mine was taken as the research background,the development laws of overlying rock fissures and the height of the were studied through methods such as physical simulation,numerical simulation,and theoretical analysis.In order to avoid damage to surface dams and water bodies caused by mine mining,a height-limited mining plan was proposed for the mining of the 110505 working face based on the height analysis results of the water-conducting fracture zone.The results show that after the working face is mined,a“concave”basin is formed on the surface,and traction cracks are generated,with the surface water level dropped by 78%;the height of the water-conducting cracks actually obtained on site is 170.76 m;physical simulation experiments,and numerical calculations,the traditional empirical formula shows that the heights of the wa-ter-conducting fracture zones of the three are 162 m,164 m and 120.57 m respectively.After the empirical formula was modified by the push-wave correction coefficient,it was deduced that the safe mining height for high-limit mining is 2.6 m.The study reveals the height growth pattern of the water-conducting fracture zones in the overlying rock on the working surface and the pattern of the reservoir water body affected by mining,providing a reference for the subse quent formulation of safety measures in Wangwa coal mine under such conditions.
作者
杨涛
张一铭
张杰
林海飞
闫医慧
张建辰
马海虎
孙建平
庞海波
武浩昊
YANG Tao;ZHANG Yiming;ZHANG Jie;LIN Haifei;YAN Yihui;ZHANG Jianchen;MA Haihu;SUN Jianping;PANG Haibo;WU Haohao(College of Energy Science and Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;Shaanxi Branch of China United Network Communications Co.,Ltd.,Xi’an 710000,China;Ningxia Wangwa Coal Industry Co.,Ltd.,Guyuan 756505,China)
出处
《西安科技大学学报》
CAS
北大核心
2024年第1期43-53,共11页
Journal of Xi’an University of Science and Technology
基金
国家自然科学基金项目(52004200,51774229)。
关键词
水库下采煤
高强度开采
绿色开采
物理仿真
导水裂隙带
coal mining under reservoirs
high intensity mining
green mining
physical simulation
water-conducting fracture zone
