采矿与安全工程学报2012，Vol.29Issue(6)：808-814,7.
特厚煤层合理放煤工艺研究
Research on the Reasonable Coal Caving Technological Parameters of Extra-Thick Coal Seam
摘要
Abstract
In order to increase top coal recovery ratio of extra-thick coal seam, we analyze the impact of drawing interval on top coal recovery ratio based on the complicated geological conditions of extra-thick coal seam with large dip angle on Danshuigou coal mine. It is found that top coal recovery ratio of "Two Wining and One Caving" technique is the highest and refuse rate the lowest in the three techniques. Top coal recovery ratios in different ways of top coal drawing of extra-thick coal seam with large dip angle are studied by numerical software PFC, we identify that the "Two Wining and One Caving" with top coal drawing ways of two-times order caving and drawing interval of 1.6 m is the reasonable coal caving technology. Industrial test indicates that optimized caving technology can significantly improve top coal recovery ratio which reaches to 87.62% and recovery ratio which reaches to 87.12%.关键词
大倾角/特厚煤层/放煤步距/放煤方式Key words
large dip angle/ extra-thick coal seam/ drawing interval/ way of top coal drawing分类
矿业与冶金引用本文复制引用
张益东,张付涛,季明,高林生,金志远,程亮,巫林平..特厚煤层合理放煤工艺研究[J].采矿与安全工程学报,2012,29(6):808-814,7.基金项目
煤炭资源与安全开采国家重点实验室开放基金项目(07KF09) （07KF09）
中央高校基本科研业务费专项基金项目(JX111744) （JX111744）
江苏高校优势学科建设工程项目 （）
