综放开采松软顶煤落放规律的理论研究  

THEORETICAL RESEARCH ON LOOSE TOP-COAL DRAWING OF LONGWALL SUBLEVEL CAVING MINING

作　　者：富强[1] 闫少宏[1] 吴健[2] 

机构地区：[1]煤炭科学研究总院北京开采研究所,北京100013 [2]中国矿业大学北京校区,北京100083

出　　处：《岩石力学与工程学报》2002年第4期568-572,共5页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金重点资助项目(59734090)。

摘　　要：考虑放煤口位态影响,分别对高位及低、中位支架单口放出时松软煤矸的移动规律进行了理论探讨,提出拱-椭球放出体、放出体轴线平均偏转角等新观点,并推导建立了相应的放出体及漏斗母线方程。As the traditional ore-drawing theory does not consider the effects of the low ore height,large opening,inclined drawing and the continuously moving of support,its application in longwall sublevel caving mining of coalmine is limited. Considering the structure and position of hydraulic support and its drawing opening,the problems are analyzed of loose top-coal moving on high-window,middle-window or low-caving- door support. A new concept of arc-ellipsoid is suggested with corresponding equations to describe the transfor- ming relation of drawn body shapes of loose top-coal on high-window support. With the help of co-moving coordinate system and the new concept of average deviation of the drawn body axis,the motion formulas of middle-window of low-caving-door support are also given to present the change of the average contacting position of drawn coal and refuse with different caving quantities.

关 键 词：综放开采 放煤规律 椭球体理论 

分 类 号：TD823.92[矿业工程—煤矿开采]