论文部分内容阅读
本文介绍了七五煤矿悬移支架放顶煤工作面顶煤破碎冒落规律，叙述了顶煤爆破和松动方法及参数优化，此法是煤质较硬煤层放顶煤面控制块度，提高回收率的一种有效方法。
This paper introduces the law of top coal breaking and caving in the top coal caving working face in the seventh and fifth coal mines, and describes the method and parameter optimization of top coal blasting and loosening. This method is the control block of caving coal face in hard coal, An effective method of recovery.