摘要
基于对井工开采上覆岩层"两带"的变形演化规律的研究分析,针对神华乌海露天矿地下"L"型工作面的开采状况,结合现场勘察资料,利用理论计算和数值模拟的综合分析方法进行研究,其结果表明,冒落带、裂隙带范围与开采宽度呈现正相关的线性关系,呈现出圆滑"M"型驼峰状;其影响高度随着开采的推进而不断增大,采动至40 m达到充分采动,最大值分别为42 m和160 m;因此,造成裂隙带间的导通,威胁着矿山的安全开采。
Based on researching and analyzing the deformation evolution law of the underground mining overburden "two zone" and the actual mining situation of underground mine "L" shaped working face of the Shenhua Open - pit Mine in Wuhai, combined with the current survey data, using the comprehensive analysis method, theoretical calculations and numerical simulation, the results show that the range of caving zone and fractured zone has a positive linear correlation relationship with mining width, which shows a sleek "M" type hump - shaped ; the influence height is gradually increasing with the advance of the mining, then the influence height reaches to the maximum values of 42 m and 160 m when the mining width achieves to the full extraction width of 40 m; as the result, the fractured zones are connected, which threatens to the safety of mine mining.
出处
《煤矿安全》
CAS
北大核心
2014年第8期72-75,共4页
Safety in Coal Mines
基金
国家自然科学基金资助项目(41172250)
"十二五"国家科技支撑计划资助项目(2012BAK09B06)
北京市创新人才资助项目(PHR201006118)
关键词
井工开采
L型工作面
冒落带
裂隙带
演化规律
underground mining
L - shaped working face
caving zone
fractured zone
evolution law