预筑大型混凝土砌块组装墙快速沿空留巷技术  

Gob- side Entry Quickly Retaining Technology by Pre- control of Large-scale Concrete Block Assembly Walls

作　　者：林东才[1] 栾恒杰[1] 贾传洋[1] 张壮壮[2] 

机构地区：[1]山东科技大学矿业与安全工程学院,山东青岛266590 [2]山东华泰矿业有限公司,山东莱芜271106

出　　处：《煤矿安全》2015年第1期67-70,共4页Safety in Coal Mines

摘　　要：为解决在沿空留巷巷旁支护体构筑过程中存在的一系列问题,通过对留巷顶板控制、墙体结构形式、承载性能以及施工工艺等进行研究,探讨了预筑大型混凝土砌块组装墙快速沿空留巷技术。研究表明:在工作面前方巷道中沿非采帮预先将混凝土砌块组装成墙,工作面采过后将墙体调整到巷道采空区侧,可实现墙体的快速构筑,并且避免了对生产的影响。墙体由带有榫卯结构的大型混凝土座块和墙块组成,各砌块间紧密扣接,墙体整体稳定性高,承载性能好。将其应用到济三煤矿工程实践,留巷速度达到1 m/h,巷道顶板最大下沉量450 mm,两帮最大移近量350 mm,墙体稳定,取得了良好的留巷效果。To solve a series of problems of roadside supporting of gob- side entry retaining in building process,the gob- side entry quickly retaining technology by pre- control of large- scale concrete block assembly walls was investigated through researching the entry retaining roof control,structure form of walls,bearing behavior as well as construction technology and so on. The results show that the walls can be built quickly by assembling concrete block into walls in the roadway ahead of working face along the coal wall in advance and then adjusting the walls to roadway gob side after the working face mining. The wall is made up of large- scale concrete bedding block and wall block that with mortise and tenon joint structure so that every block can fasten closely. Therefore,the wall is good at global stability and bearing behavior. Industrial test about block wall in No. 3 Jining Coal Mine proves that the gob- side entry retaining speed reaches to 1 m / h,the biggest roadway roof subsidence deformation is 450 mm and the deformation of the biggest two- side is 350 mm with nice performance for entry retaining.

关 键 词：沿空留巷 预控顶板 大型混凝土砌块 巷旁支护 墙体结构 

分 类 号：TD823.48[矿业工程—煤矿开采]