大采高工作面煤壁片帮机理数值模拟

Numerical Simulation of Coal Rib Spalling Mechanism of Large Cutting Height Workface

以赵固一矿15018工作面为工程背景,采用理论分析和数值模拟的方法对12011工作面的煤壁片帮深度机理进行研究和分析,对在支承压力作用下的煤壁片帮形式进行了压杆理论模型分析,得到了在不同采高和采深下煤壁片帮的变化情况,即随工作面采高和采深的增加煤壁片帮也会相应的增大。通过对在不同采高和采深煤壁的垂直位移、水平位移、煤壁塑性区的模拟,分析了大采高煤壁片帮的诱发机理,对于煤壁片帮较严重的大采高工作面的安全生产和支护设计都有一定的指导意义。

Taken the 15018 working face of Zhaogu No. 1 mine as the engineering background, coal rib spalling deep mechanism of 12011 working face was numerical simulation. Shaft theory model analysis was studied and analyzed by theoretical analysis and done on coal rib spalling form under abutment pressure effect, changing situations of coal rib spalling of different mining height and depth were ob- tained, and the coal rib spalling would increase with the increasing of mining height and depth of working face. Inducement mechanism of large cutting height coal rib spalling was analyzed through simulation of vertical displacement, horizontal displacement of coal and coal plastic zone of different mining height and depth, which had a certain guiding significance for safety production and support design of large cutting height working face which coal rib spalling serious.