沙土质型冲沟发育区浅埋煤层长壁开采支护阻力的确定  

Support resistance determination for shallow coal seam longwall mining in sand-soil gullies overlaying mining area

作　　者：王旭锋[1,2,3] 张东升[1,2,4] 张炜[5] 许猛堂[1] 

机构地区：[1]中国矿业大学矿业工程学院,江苏徐州221116 [2]煤炭资源与安全开采国家重点实验室,江苏徐州221116 [3]深部煤炭资源开采教育部重点实验室,江苏徐州221116 [4]新疆大学地质与矿业工程学院,新疆乌鲁木齐830046 [5]中国矿业大学物联网(感知矿山)研究中心,江苏徐州221008

出　　处：《煤炭学报》2013年第2期194-198,共5页Journal of China Coal Society

基　　金：国家自然科学基金青年基金资助项目(51004101);中国矿业大学青年科研基金资助项目(2009A001);江苏高校优势学科建设工程资助项目(PAPD)

摘　　要：基于沙土质型冲沟坡体下浅埋煤层长壁开采顶板结构承受非均匀载荷的基本特征,采用理论分析与现场实测的方法,以工作面背沟推进为主要方式,将冲沟坡体及其形态纳入顶板结构控制当中,结合冲沟坡体下开采基本顶初次破断与周期破断时的顶板结构力学模型,按给定失稳载荷状态,分析了工作面来压期间的"支架-围岩"作用关系模型,得到了控制顶板结构滑落失稳的支护阻力。结合具体工作面地质条件,分析了支架工作阻力随工作面推进的变化特征,给出了支架支护阻力算例,针对该工作面支架支护阻力进行的现场实测结果验证了该方法的可靠性。Based on the main roof bearing asymmetrical loads when longwall mining under a sand-soil gully slope in shallow coal seam, theory analysis and field observation methods were used, the gully slope and its shape were consid- ered, a roof structure mechanical model was established when the long-wall working face backward-gully mining in first and periodic weighting, and a ＂support and surrounding rock＂ relation model was analyzed under given instability loads. Furthermore, the support resistance which could control the roof structure sliding instability was obtained. The support resistance changing features were analyzed along the working face advancement combined with practical geo- logical conditions, and the rational support resistance calculation example was provided. The field observation result demonstrated the reliability of the method.

关 键 词：浅埋煤层 冲沟坡体 长壁开采 支护阻力 顶板结构 

分 类 号：TD823.2[矿业工程—煤矿开采] TD353[矿业工程—矿山开采]