固体充填开采支架与围岩关系研究  

Research on support-rock system in solid backfill mining methods

作　　者：王家臣[1] 杨胜利[1] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《煤炭学报》2010年第11期1821-1826,共6页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(50974123);国家自然科学基金重点资助项目(50834005)

摘　　要：分析了充填开采支架与围岩关系和上覆岩层移动特征,确立顶板载荷估算方法,并通过充填开采实例进行验证。研究表明:充填工作面周期来压步距大,来压强度不明显;直接顶随着工作面推进逐渐冒落,垮落步距相比于普通综采工作面显著增大;基本顶以缓慢下沉形式发生弯曲变形,上覆岩层移动范围明显减小。支架高工作阻力可以控制顶板的下沉量,保证良好的充填效果,进而减小覆岩破坏高度,控制地表变形。Analyzed support-rock system and overburden movement features in backfill mining,different load estimation formulas which were already verified by engineering examples for the main roof were set up.Studies show that the range of periodic weighting is relatively wide in backfill mining,and the weighting strength is also low;immediate roof will be caving as the advance of the face.The main roof may move to goaf by a slow mode of subsidence,and displacement can dramatically decrease.Higher support working resistance can effectively control roof subsidence at the early stages,not only guarantee the good filling effect,but also decrease the height of slowly subsided zone,as a result,ground surface deformation can be well controlled.

关 键 词：充填开采 岩层移动 支架与围岩关系 缓慢下沉 顶板载荷 

分 类 号：TD823.7[矿业工程—煤矿开采] TD323[矿业工程—矿山开采]