陷落柱影响区综放工作面煤壁及顶板超前注浆加固技术

为了解决综放工作面过陷落柱期间煤壁片帮、顶板冒顶的问题,以赵庄二号井2309工作面为背景,通过槽波及钻探确定陷落柱影响范围,采用深浅孔配合的注浆加固方案对陷落柱影响区煤体及顶板进行加固。注浆加固后工作面煤壁平整且未出现冒顶现象,工作面推进速度得到明显提高,为正常区的80%以上。

Advance Grouting Reinforcement Technology of Coal Wall and Roof in Fully Mechanized Caving Face of Collapse Column Affected Area

In order to solve the problem of coal wall and roof falling during the period of fully mechanized top coal caving face passing through the collapse column,taking the 2309 working face of Zhaozhuang No.2 Well as the background,the influence scope of the collapse column is determined by the trough wave and drilling,and the coal body and roof in the area affected by the collapse column are reinforced by the grouting reinforcement scheme of deep and shallow holes.After grouting reinforcement,the coal wall of the working face is flat and there is no roof falling,and the advancing speed of the working face is obviously increased,which is more than 80%of the normal area.