采动影响下断层覆岩运移规律的相似模拟研究

Similarity simulation study of overburden rock migration under the influence of mining

为研究断层在开采活动下的运移规律及其煤柱留设,以新疆屯宝煤矿1192工作面为研究对象,采用相似材料模拟,搭建仿真模拟实验架,分析该工作面开采过程中断层上下盘移动规律,确定合理断层煤柱。试验结果表明:煤柱留设在17m左右,断层上下盘出现移动现象,并出现支撑压力集中现象;12m左右,出现断层上下盘下移现象;9m左右,断层上下盘均向上移动,如若持续推进,断层将出现上盘向下移动,下盘向上移动,形成对断层围岩的剪切破坏。

In order to study the movement rule of fault under mining activities and the retention of coal pillar,the 1192 working face of xinjiang tunbao coal mine was taken as the object of study,and similar materials were used to simulate and build a simulation experimental frame,to analyze the movement rule of the upper and lower wall of the fault in the mining process of the working face,and to determine the reasonable coal pillar of the fault.The results showed that the coal pillar was set at about 17m,and the upper and lower wall of the fault moved and the support pressure concentrated.Around 12m,the upper and lower footwall of the fault moves downward.About 9m,both the upper and lower wall of the fault move upward.If continuous progress is made,the upper wall of the fault moves downward and the lower wall moves upward,resulting in shear failure of the surrounding rock of the fault.