摘要
为提高掘进效率,姚桥煤矿在7704综放工作面材料道试用了高预紧长锚固低密度支护技术,顶板采用单一柔性锚杆支护,锚杆排距放大到1.2 m。监测表明,顶板总体控制效果理想,围岩内部裂隙控制到浅部,顶板较平整。2019年3月份在7703材料道采用此技术掘进进尺616 m,达到近年来历史最好水平。
The low-density support technology with high pre-tightening long anchorage is applied in haul road at 7704 working face of Yaoqiao Colliery,in which roof is supported by single flexible bolt with row distance of 1.2 m.The test results show the roof is controlled remarkably with shallow internal fracture of surrounding rock and flat roof.
作者
王念雷
祝令锦
阚甲广
谢正正
Wang Nianlei;Zhu Lingjin;Kan Jiaguang;Xie Zhengzheng(Yaoqiao Colliery,Datun Co.,China National Coal Group Corp.,Xuzhou,Jiangsu 221600;School of Mines,China University of Mining and Technology,Xuzhou,Jiangsu 221116)
出处
《江西煤炭科技》
2019年第4期33-36,42,共5页
Jiangxi Coal Science & Technology
关键词
高预紧长锚固
柔性锚杆
顶板支护
high pre-tightening long anchorage
flexible bolt
roof support
