摘要
新桥矿-550 m北翼轨道大巷底鼓剧烈,最大底鼓达到800 mm,严重影响巷道的正常使用。从巷道的围岩力学性质、应力状态以及原支护强度出发,分析了影响巷道底鼓的主要因素。根据影响底鼓的因素,提出了顶帮锚网索+底角锚杆+底板锚索的控制措施,并结合FLAC2D数值模拟进行了分析比较。工程实践表明,方案实施效果良好,有效控制了巷道底鼓。
The floor heave of the north main roadway at-550 m level in Xinqiao Coal Mine is serious,the maximum up to 800 mm,which affects the normal usage of roadway.Major factors that lead to floor heave were analyzed as following：mechanical property and stress situation of surrounding rock,original support strengthen.Based on these factors,a measure that bolts,anchor and metal nets on the roof,bolting in the corner of the floor,anchor into the floor was put forward.Comparision of the new technology to the old technology was done by FLAC2D numerical simulation.Engineering application showed that effects of the new control technology is obvious,and the surrounding rock of the main roadway kept stability well.
出处
《中州煤炭》
2011年第2期4-6,共3页
Zhongzhou Coal
基金
教育部科学技术研究重点项目资助(109075)
关键词
软岩
岩石大巷
底鼓
数值模拟
soft rock
main rock roadway
floor heave
numerical simulation
