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

作　　者：张益东[1] 张付涛 季明[1] 高林生[1] 金志远[1] 程亮[1] 巫林平[1] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室,矿业工程学院,江苏徐州221116 [2]中国煤炭进出口公司,北京100011

出　　处：《采矿与安全工程学报》2012年第6期808-814,共7页Journal of Mining & Safety Engineering

基　　金：煤炭资源与安全开采国家重点实验室开放基金项目(07KF09);中央高校基本科研业务费专项基金项目(JX111744);江苏高校优势学科建设工程项目

摘　　要：为了解决特厚煤层放出率问题,针对担水沟煤矿大倾角特厚煤层的复杂地质条件,通过实验室散体实验分析大倾角厚煤层条件下,放煤步距对顶煤采出率的影响,得到不同放煤步距的顶煤的放出率与含矸率,两采一放的顶煤放出率最高,含矸率最低,用PFC数值软件研究了大倾角厚煤层综放开采不同放煤方式顶煤的放出率。确定了合理的放煤工艺,即两采一放双轮顺序放煤、放煤步距为1.6 m。工业性试验表明采用优化后的放煤工艺能够显著提高顶煤的放出率,统计得出9101工作面的顶煤放出率达到87.62%,采出率达到87.12%。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 

分 类 号：TD823[矿业工程—煤矿开采]