摘要
液压支架在我国使用已有近15年历史，架型也有很大变化，但迄今为止影响综采工作面生产效率的重大因素之一是顶板的端面冒落，本文研究了顶板形成端面冒落的机理，着重分析了老顶断裂后引起的滑落失稳与变形失稳对直接顶稳定性的影响，及其对直接顶内破碎带形成所起的作用，同时初步探讨了支架结构的改变对防止端面顶板冒落所起的作用。
The powered supports have been applied in China about fifteen years,and the types of support have changed considerably. Up to now,one of the important factors that affects face productivity of a fully mechanized face is roof caving in tip to face area. The paper studies the mechanism of roof cavings. Emphasis is laid on the effect of sliding instability and rotation instability due to fracture of main roof on stability of the immediate roof,and effect on formation of fractured zone in immediate roof. The paper investigates preliminarily how to prevent roof caving in 'Tip to Face' area by changing the structure of the powered support.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
1990年第1期1-9,共9页
Journal of China Coal Society
