“三软”厚煤层综放开采采出率影响因素及规律分析

Mining Rate Influence Factors and Law of Full-mechanized Top Coal Caving Mining with ‘Three-soft'Thick Seam

以新郑煤电公司11208工作面开采地质条件为背景,对煤炭损失构成进行了系统分析,结果表明:三软厚煤层综放开采的采出率主要受煤柱宽度、底煤厚度和底煤过渡角等因素影响。在综放开采中减小煤柱宽度和底煤厚度,适当增加底煤过渡角,可大大提高综放开采采出率。

It taking mining geological situation of 11208 working face of Xinzheng coal and electricity company, then coal lose constitutewas analyzed system, the studying showed that the main factors that influenced mining rate of fully mechanized top coal cavingmining with ‘three-soft’ thick seam were coal pillar width, floor coal depth and floor coal transition angle and so on. When coal pillarwidth and floor coal thickness of fully mechanized top coal caving mining were decreased, and floor transition angle increased properly,then mining rate could be improved obviously.