坚硬顶板沿空留巷巷旁支护技术及工程应用  

Roadside support technology for gob-side entry retaining under hard roof and the engineering application

作　　者：杨富强[1] 相啸宇 张玉宝[2] 王成武[1] 张巍[2] 

机构地区：[1]北京昊华能源股份有限公司,北京102300 [2]山东科技大学矿业与安全工程学院,山东青岛266590

出　　处：《煤炭工程》2017年第8期78-81,共4页Coal Engineering

摘　　要：针对沿空留巷坚硬顶板条件,在传统巷旁密集单体支柱切顶支护的基础上,提出了"锚索+单体液压支柱"巷旁主动强力切顶支护技术。巷旁先采用密集单体支柱支护,然后打锚索支护,构成强力切顶结构,待采空区顶板垮落后,将密集支柱回出,支设新的一排柱距较大的单体支柱。通过力学分析得到了巷旁单体支柱和实体煤的支护阻力大小,并对木城涧煤矿六槽东四壁运输巷进行沿空留巷试验。围岩监测数据表明:一次采动后沿空留巷顶底板移近量达125mm,两帮移近量达到52mm;二次采动对顶底板及两帮的移近量影响较小,仅分别增加了40mm、5mm。可见,采用"锚索+单体液压支柱"巷旁支护对坚硬顶板沿空留巷的围岩稳定性具有良好的控制作用。According to the conditions of gob - side entry retaining under hard roof, the anchor cable and single hydraulic prop support is proposed for roadside active power roof cutting, on the basis of the traditional roadside support with intensive single hydraulic prop. First, intensive single props are used to support roadside roof and anchor cable is used additionally, to form a power roof cutting structure. When the goal roof falls, the intensive props are gradually evacuated, and a new row of single props with larger space are deployed. The roadside active supporting system comprised of new single props and anchor cable is established. The support resistances of the single prop and coal sidewall is obtained through mechanical analysis. According to the field investigation of gob - side entry retaining in Muchengjian Coal Mine ： the roof- to -floor convergence is 125mm and the two side convergence reaches 52mm after first mining; the influence of second mining on the roof - to - floor convergence and two side convergence are relatively small, which area 40mm and 5mm. The ＂anchor cable and single hydraulic prop＂ roadway support technology has a good control effect for the stability of surrounding rock in gob - side entry retaining under hard roof.

关 键 词：沿空留巷 坚硬顶板 巷旁锚索 单体液压支柱 现场试验 

分 类 号：TD353[矿业工程—矿井建设]