放顶煤开采顶煤裂隙分布与块度的相关研究

用实测构造裂隙分布和发育程度及其与工作面布置关系，研究其对顶煤破碎冒落块度特征和顶煤采出率的影响。根据裂隙组数、方位及发育程度，选择相适应的工作面布置，能改善顶煤冒放性，即组数多、间距小、匹配合理，则冒块越小，冒放性越好。

CORRELATION BETWEEN DISTRIBUTION OF CRACKS AND FISSURES IN TOP COAL AND SIZE OF FRAGMENT OF MINING WITH SUBLEVEL CAVING

The effect of cracks and fissures in the top coal on the characteristics of the size of the caved block of the top coal and the rate of coal recovery is studied based on the measured distribution of tectonic cracks and fissures, extent of development and the face layout. When the face layout is properly selected in accordance with the number of sets of cracks and fissures, their directions and extent of development, it can improve the cave ability of the top coal. That is, the more the number of sets of cracks, the smaller the interval of the cracks, and the better their compatibility, the smaller the size of the caved coal and the better the cave ability.