摘要
某矿煤层顶板松软层厚,遇水易膨胀,导致巷道矿压显现明显,破坏变形严重,巷道支护存在很大的困难,针对这种情况,该矿采取外锚内注锚杆注浆加固、U型可伸缩性支架和喷混凝土联合支护方案,本文对联合支护的各项参数及施工方法进行了详细的分析,巷道围岩变形得到了有效控制,为矿井每年节约维修费约70万元,值得在类似地质条件的矿井中应用。
Soft rock of seam roof is thick and easy to expand while encountering water in some colliery, which re- suits strata behavior, serious deformation of roadway and difficulty of roadway support. Aiming at this situa- tion, joint support of bolt grouting strengthening with bolting outside and grouting inside, U--shaped scalable stent and shotcrete is adopted in the colliery. The paper analyzes the parameters of joint support and construc- tion method, which effectively controls surrounding deformation of roadway, saves 700,000 yuan of maintenance expense for mines each year and worths applying in mines of similar geological conditions.
出处
《江西煤炭科技》
2014年第1期89-91,共3页
Jiangxi Coal Science & Technology
关键词
软岩
巷道
支护
锚杆
加固
soft rock
roadway
support
bolt
strengthening
