深部倾斜煤层沿空掘巷上覆结构稳定与控制研究  

Stability and control technology of overlying structure in gob-side entry driving roadways of deep inclined coal seam

作　　者：王猛[1] 柏建彪[1] 王襄禹[1] 陈斌[1] 韩志婷[1] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室,矿业工程学院,江苏徐州221116

出　　处：《采矿与安全工程学报》2015年第3期426-432,共7页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51204166,51174195);江苏省普通高校研究生科研创新计划项目(CXLX13_952)

摘　　要：采用理论分析方法,建立了深部倾斜煤层沿空掘巷上覆结构力学模型,分析了回采期间上覆关键块体稳定性与煤层埋深、倾角间的关系,发现沿空掘巷回采期间关键块体主要以发生转动失稳为主,控制关键块体转动失稳是维护巷道整体稳定的前提条件;并通过巷内支护阻力对关键块体转动失稳系数作用规律分析,得知关键块体转动失稳系数对窄煤柱与顶板承载能力的敏感性远大于实煤体帮,提高二者承载能力可有效抑制关键块体转动下沉。基于高强锚杆支护体系,提出以顶板高阻让压支护和倾斜穿层锚索加固窄煤柱为核心的深部倾斜煤层沿空掘巷非对称耦合控制技术,采用系统信息设计方法确定了试验巷道锚杆支护参数,成功地应用于工程实践。Based on theoretical analysis, mechanical model of overlying structure in gob-side entry driving roadways of deep inclined coal seam has been established;the relationship between stability of overlying strata key block and burial depth, dip angle of coal seam during recovery period has been analyzed, which has indicated that main motion form of the key block during recovery is rotational in-stability, and precondition of maintaining roadway stability is to control rotational instability of the key block;the effect analysis of roadway-inner supporting resistance on rotational instability coefficient of key block has indicated that the sensitivity of rotational instability coefficient of key block to carrying capacity of narrow coal pillar and roof is much more intense than that to solid coal pillar, so improving capacity of narrow coal pillar and roof can control rotational sinking of key block effectively. Based on high strength bolting system, gob-side entry driving asymmetric coupling control technology in deep in-clined coal seam has been put forward with core technology of high-resistance yielding support of roof and inclined traversing seam anchor cable enhancing narrow coal pillar. Bolting parameter of testing roadway has been confirmed by system information designing method. And finally, it will be applied to engineering practice successfully.

关 键 词：深部倾斜煤层 沿空掘巷 关键块体稳定 非对称耦合控制技术 

分 类 号：TD353[矿业工程—矿井建设]