综采工作面老顶周期来压比初次来压时顶板压力显现强烈的原因分析

Why the Roof Pressure is Stronger When it is in Periodic Weighting than it is in First Weighting in the Fully Mechanized Mining Face

相邻矿井在开采同一煤层时,易发生工作面液压支架压坐垫(压死架)、局部冒顶的事故。通过研究顶板运动规律,对老顶来压进行观测、记录、分析,进而掌握老顶来压的规律,对其采取一定措施,可以有效减少事故的发生。

For adjacent mines, when they exploit the same coal rake , they may face partial roof fall when there is the crushed cushion frame in the working surface . By studying the law of roof movement , we try to observe, record and analyze the pressure of the old roof in order to master the rule of the pressure of the old roof and try to reduce the occurrence of the kinds of accidents.