摘要
为研究树脂锚索锚固力大小的影响因素,以塔然高勒煤矿回风大巷复合顶板地质条件为工程背景,在井下巷道进行长度不同、锚固长度相同锚索锚固力现场试验。结果表明锚索长度加长,锚索搅拌树脂锚固剂效能减弱,导致锚索锚固力降低;锚索锚固力大小受岩层强度影响明显,砾岩层锚固力最大,泥岩层锚固力次之,煤层锚固力最小;满足三径匹配前提下,为保证锚索达到足够锚固力,应将锚索锚固段锚固到稳定岩层,据此确定出大巷顶板的锚索长度,为类似地质条件矿井巷道锚索锚固力设计提供参考依据。
In order to study influence factors of resin cable anchoring force, it taking compound roof of air return roadway of Tarangaole coal mine as background, cable anchoring force field testing under different anchorage length and the same length were tested. The results showed that cable anchoring force decreased with length increased as resin stirring efficiency decreased, stratum strength obviously influenced anchoring force, the largest was boulder bed, next was mudstone, the smallest was coal seam, in order to ensure enough anchoring force as meet three diameters matching, anchorage point should located at stability stratum, so cable length was confirmed, and it reference for similar situation.
作者
张剑
ZHANG Jian(Mining Institute, China Coal Research Institute, Beijing 100013, China;Coal Mining & Designing Department, Tiandi Science & Technology Co., Ltd.,Beijing 100013, China;State Key Laboratory of Coal Resource High Effective Mining & Clean Utilization, Beijing 100013, China)
出处
《煤矿开采》
北大核心
2018年第6期52-54,23,共4页
Coal Mining Technology
基金
国家重点研发计划资助项目(2017YFC0603000)
关键词
锚索长度
锚固力
岩层强度
三径匹配
anchorage length
anchoring force
stratum strength
three diameters matching
