摘要
为研究含次生断裂构造煤层开采时各因素对煤层推进距离的影响,采用正交试验与数值模拟方法,以采动顶底板塑性破坏区与主断层沟通情况作为突水判据,对主断层一定的条件下,工作面斜长、采高、次生断裂构造与主断层间的夹角、距离变化共9种方案进行模拟,获得了各方案的突水临界推进距离。研究表明,工作面长度对推进距离的影响最为显著,其次是采高、次生断裂构造的倾角及其与主断层距离;煤层安全回采距离随工作面长度及采高的增加而减小;次生断裂构造的倾角及其与主断层的距离对安全回采距离影响相对较小。
In order to study the influences of various factors on the advancing distance of mining coal seam with the secondary fault, orthogonal test and numerical simulation were adopted. Taking the main fault and the plastic failure zone of the roof and floor as the criterion of water inrush, 9 schemes were simulated, including the dip length of working face, mining height, the angle between secondary faults and main faults and distance change. Under certain conditions of the main fault, the critical ad- vancing distance before water inrush in each scheme was obtained.The study showed that the length of the working face had the most significant influence on the advancing distance, followed by the mining height, the dip angle of secondary fault and their distance from the main fault. With the increase of the length of working face and mining height, the safe mining distance of coal seams gradually reduced. The dip angle of the secondary fault and its distance from the main fault had little influence on the safe extraction distance.
出处
《矿业研究与开发》
CAS
北大核心
2018年第1期101-104,共4页
Mining Research and Development
基金
国家自然科学基金资助项目(41472281)
高等学校博士学科点专项科研基金项目(20133718110015)
关键词
正交试验
次生断裂构造
煤层开采推进距离
显著
性分析
Orthogonal test, Secondary fault, Advancing distance of mining coal seam, Significance analysis
