摘要
研究了锚杆长度和密度变化对800 m 采深全煤回采巷道围岩的控制规律, 得出在一定锚杆支护密度时其长度变化对围岩的作用极小, 而锚杆长度超过1-0 m 时其支护密度临界值为750 m m ×750 m m .
Studying the controlled pattern of the surrounding rock mass in actual mining roadway of 800 m depth by changing the length and density of bolts,this paper considers that the variations of length will almost have no influence on surrounding rock mass as density being a fixed factor,moreover bolt's critical density is each bolt keeping an area of 750?mm×750?mm when its length is more than 1 0?m..
出处
《山西煤炭》
1999年第4期8-9,13,共3页
Shanxi Coal
