L 型钻孔地面预注浆技术在煤矿井下巷道加固工程中的应用.pdfVIP

学兔兔 第19卷第1期 (总第116期) 煤 矿 开 采 Vo1．19No．1(Series No．116) 2014年2月 COAL MINING TECHNOLOGY February 2014 L型钻孔地面预注浆技术在煤矿 井下巷道加固工程中的应用 安许艮 (1．天地科技股份有限公司建井研究院，北京100013；2．北京中煤矿山工程有限公司，北京100013) [摘 要] L型钻孔地面预注浆技术将传统的地面预注浆技术与先进的定向钻进技术相结合， 利用地面预注浆压力大的优点，在井下水平巷道开挖前，从地面对其进行超前加固，从而提高围岩稳 定性，降低开挖支护难度，节省开挖支护工期。在介绍L型钻孔地面预注浆技术特点的基础上，阐述 了该技术在信湖煤矿的应用情况，并对其关键施工装备进行了总结。 [关键词] L型钻孔；地面预注浆；定向钻进；超前加固 [中图分类号]TD265．4 7 [文献标识码]A [文章编号]1006．6225(2014)01．0056—04 Application of Surface Pre-grouting with L-style Drill—hole in Underground Roadway Reinforcement Engineering AN Xu-liang ， (1．Well Building Institute，Tiandi Science＆Technology Co．，Ltd．，Beijing 100013，China； 2．Beijing Zhongmei Mine Engineering Co．，Lid．，Beijing 10013，China) Abstract：Combining traditional surface pre—grouting technology and advanced directional drilling technology，the technology of surface pre—grouting with L—style drill—hole can take advantage of large surface pre—grouting pressure，improve surrounding rock stability，reduce excavation difficulty and save construction time by advanced reinforcement on surface before underground horizontal roadway is excava- ted．On the basis of analyzing technical characteristic of surface pre—grouting with L—style drillhole，this paper introduced its application in Xinhu Colliery and summarized its key construction equipments． Keywords：L—style drill—hole；surface pre—grouting；directional drilling；