摘要
为掌握巷道围岩松动圈范围,改善围岩浅部完整性较差的问题,以三交河煤矿11-1042巷掘进期间围岩支护为研究对象,采用声波法对围岩松动范围进行测试,并根据松动圈理论进行支护设计。通过现场监测,采用锚杆锚索联合支护顶板未发生离层,巷道围岩稳定,且浅部破碎现象明显改善,验证了锚杆支护参数的合理性。
In order to obtain the scope of the surrounding rock loosening circle and improve the integrity of the surrounding rock, the surrounding rock support during the excavation of the tunnel 11-1042 in SanjiaoHe Coal Mine was used as the research object. The loose range of the surrounding rock is tested and measured by the sonic wave method, and the support design is carried out according to the theory of loose circle. Through on-site monitoring, it is founded that no delamination is occurred with the using of bolts, anchors, and cables to support the roof, the surrounding rock of the roadway keeps stable, and the fragmentation phenomenon in shallow part of the roof is no longer a significantly appeared, which verified the reasonability of the bolt support parameters.
出处
《山西焦煤科技》
2019年第11期4-7,11,共5页
Shanxi Coking Coal Science & Technology
关键词
围岩松动圈
声波法
联合支护
Surrounding rock loose zone
Sonic method
Combined support
