承压水上开采工作面底板破坏深度相似模拟试验

Similar Simulation Experiment for Mining Face Floor Damage Depth of Mining Above Confined Water

以赵固二矿11050工作面承压水上开采工作面底板破坏为研究对象,通过研制一种可控制模拟承压水加载与底板破坏关系的实验平台,进行承压水上开采工作面的物理模拟,观测岩层变化特征,并用超声波检测仪器进行验证分析研究。结果表明:随着工作面的推进,岩层的裂隙经历产生、延伸、贯通的发育过程,最终确定底板裂隙破坏深度为16 cm左右。

Taking the floor damage of mining face above confined water of Zhaogu No. 2 Coal Mine 11050 working face as the research object,by developing a experimental platform for simulating the relationship between confined water loading and floor failure,we carry out physical simulation of confined water on mining face and observe rock characteristics and analyze the results by ultrasonic testing instrument. The results show that a crack in the rock strata experiences the development process of generation,extension,run-through,with the advance of working face,which eventually determines that the damage depth of floor fracture is 16 cm.