摘要
为了确保巷道围岩稳定,提高巷道掘进速度,以某矿301工作面回风巷为例,根据实际地质概况,分析了不同锚杆间排距、锚杆长度、锚杆直径和锚杆预应力下巷道围岩表面位移情况。研究得出了,锚杆间排距设置为800mm,锚杆长度设置为2200mm,锚杆直径设置为20mm,锚杆预应力设置为30kN,此时巷道支护参数最优。研究为类似工程条件下巷道支护参数选择提供了借鉴。
In order to determine the stability of roadway surrounding rock and improve the speed of roadway excavation,taking the return air duct of 301 working face of a mine as an example,according to the actual geological profile,the displacement of surrounding rock of roadway under different row spacing,length,diameter and prestressing of bolt are analyzed.The research shows that the row spacing between bolts is set to 800 mm,the length of bolts is set to 2 200 mm,the diameter of bolts is set to 20 mm,and the prestress of bolts is set to 30 kN,at this time,roadway support parameters are optimal.The study draws lessons from the selection of roadway support parameters under similar engineering conditions.
作者
王明
Wang Ming(Juji Coal Mine,Yongcheng Coal Company,Henan Energy and Chemical Industry Group,Yongcheng 476600,China)
出处
《能源与环保》
2019年第10期174-176,180,共4页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
关键词
锚杆间排距
锚杆长度
锚杆直径
锚杆预应力
围岩表面位移
spacing between bolts
length of bolt
diameter of bolt
prestress of anchor
displacement of surrounding rock surface
