摘要
结合我国放顶煤开采的实践,对放顶煤工作面顶煤的破碎和移动规律及上覆岩层的活动规律进行了研究,指出了开采深度、煤层强度、支架支护强度及煤层厚度等是影响顶煤破碎和放顶煤效果的主要因素。同时指出了顶煤的破碎是顶煤与上覆岩层相互作用的结果,而支架仅起辅助破煤的作用。并在此提出了顶煤破碎分区。
In the paper ,based on the practice of caving roof coal in China,the fragmentation mechanism,its displacement and overhead layer roof were studied. It refers that the caving depth, the coal strength , the supporting strength, and the thickness of coal seam main factors of cover fragmentation and effort of caving. At the same time, cover fragmentation is the interaction result of cover coal and superimposed roof,and the spports only help to break the coal. And put forward the sectoring of fragmentation.
出处
《河北煤炭》
2004年第3期6-8,共3页
Hebei Coal
关键词
放顶煤
顶煤破碎机理
上覆岩层
破煤作用
caving roof coal
Fragmentation mechanism of roof coal
superimposed roof
coal fragmentation
