摘要
在实际观测基础上,把已垮落破碎的顶煤抽象为松散介质,通过相似材料模拟实验,全面分析了放煤步距对顶煤回收率的影响,从而提出了合理放煤步距的新概念,同时利用松散介质放出椭球体理论建立了确定合理放煤步距的数学模型,为在各种放顶煤条件下选择合理放煤步距确立了定量关系。
Based on field observations and measurement, the caved broken roof coal was assumed to be a loose medium. This paper made a comprehensive analysis of the effect of coal drawing interval on recovery rate of roof coal by making simulation test of a model built with equivalent materials. A new concept of optimal drawing interval was proposed. A model of optimal drawing interval was established based on the theory of drawing ellipsoid in loose medium. The optimal interval of drawing can be induced depending upon the varying conditions of longwalls using sub-level caving method.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
1993年第4期37-42,共6页
Journal of China Coal Society
关键词
放顶煤
放煤步距
综采
采煤
sub-level caving
drawing interval
loose medium
drawing ellipsoid
