摘要
鲁中冶金矿山公司小官庄铁矿北运巷处于软岩高应力区,周边应力大于围岩强度,支护强度低,所以变形破坏速度快。采用卸压支护技术.使用寿命比过去延长430d,比强支少维修1.5次,直接经济效益18万元.
The north tunnel of Xiao Guan Zhuang Iron Mine of Lu Zhong Metallurgical Mine Corporation is located at soft rock-high stress district and it's stress around is gerater than country rock strength and the support strength is lower.Utilized of unload-support technique the service life of tunnel is extended and the direct economic result is 0.18 million yuan(RMB).
出处
《山东冶金》
CAS
1996年第5期1-4,共4页
Shandong Metallurgy
关键词
支护结构
软弱围岩
应力场
巷道
support construction
soft country rock
stress field
