长壁工作面充填开采的充填比与充填效应分析  

Analysis of filling effect and filling ratio of backfill mining in longwall face

作　　者：李青锋[1,2] 王戈[1,2] 朱川曲[1,2] 

机构地区：[1]煤矿安全开采技术湖南省重点实验室,湖南湘潭411201 [2]湖南科技大学能源与安全工程学院,湖南湘潭411201

出　　处：《矿业工程研究》2009年第2期21-24,共4页Mineral Engineering Research

基　　金：国家自然科学基金重点资助项目(50634050);国家重点基础研究发展计划资助项目(2007CB209400)

摘　　要：为研究充填开采对回采工作面矿山压力显现和顶板裂隙发育高度的影响,从现场开采实践出发,建立长壁开采工作面充填开采的关键层力学模型,通过理论分析得到了确保关键层弯曲下沉的最小充填厚度.随后通过RFPA数值模拟系统对比了分析煤层实施充填开采和完全垮落法开采时的上覆岩层活动规律,分析认为工作面充填开采使工作面矿山压力显现明显减弱,顶板裂隙带高度明显降低;在有断层情况下,采动裂隙也沿断层带发育,顶板裂隙发育高度比完全垮落法时变化不大.For studying on the influence of coal pressure appearing and roof break developing height when the working face is mined by backfilling, the key stratum mechanical model of backfill mining in longwall face is established through field mining practice. The minimum backfill thickness has been obtained by theoretical analysis which can ensure key stratum bending subsidence. Then, the overlying strata movement law of backfill mining and fully caving is comparatively analyzed by the numerical simulation system of RFPA. When the longwall face is mined by backfilling, the results show that the coal pressure appearing is obviously weakened, and the roof fractured zone height is significantly decreased. If there is a fault, mining-induced fractures are also developed through fault zone, and the roof break developing height is approximately equal that of fully caving method.

关 键 词：长壁工作面 充填开采 充填比 充填效应 

分 类 号：TU317[建筑科学—结构工程]