摘要
随着开采深度的增加,20MnSi全螺纹钢等强锚杆已不能满足深部支护要求,通过采用BHR B500型高强高预紧力锚杆支护,巷道变形量得到有效控制,满足了安全生产需要。
Along with the increasing of mining depth, 20MnSi steel bolt could not meet the demand of deep support. By using BHR B500 high strength and pretension bolt, the tunnel deformation was controlled effectively, and which met the demand of safety production.
出处
《中国矿山工程》
2008年第4期31-32,33,37,共4页
China Mine Engineering
关键词
深井
预紧力
高强锚杆
deep well
pretension
high strength bolt
