大倾角煤层综放开采放煤工艺优化试验  

Optimized Trial on Fully Mechanized Top Coal Caving Mining in High Inclined Seam

作　　者：程文东[1] 李俊民[2] 谢俊文[3] 

机构地区：[1]西安科技大学能源学院,西部矿井开采及灾害防治教育部重点实验室,陕西西安710054 [2]靖远煤业集团有限责任公司,甘肃靖远730913 [3]华亭煤业集团有限责任公司,甘肃华亭744100

出　　处：《煤炭科学技术》2009年第7期18-20,63,共4页Coal Science and Technology

基　　金：教育部新世纪优秀人才支持计划资助项目(CET-04-0972)

摘　　要：为了提高煤炭采出率,以王家山煤矿大倾角厚煤层走向长壁综放面为实例,运用数值模拟和现场试验相结合的方法,对放煤工艺进行了研究。研究结果表明,下行式双轮间隔顺序等量放煤,有利于保持工作面支架稳定,但煤炭采出率低;上行式双轮间隔顺序等量放煤,煤炭采出率高,但在工作面中上部的支架易失稳;放煤步距为1.2 m两采一放工艺采出率较高,不易混入矸石,且有利于支架稳定。因此,在工作面上部采用下行式双轮间隔顺序等量放煤方式;在工作面中下部采用上行式双轮间隔顺序等量放煤方式;放煤步距1.2 m,煤炭采出率82.27%。In order to improve the coal recovery rate, taking the fully mechanized top coal caving longwall strike coal mining face in a thick and inclined seam of Wangjiashan Mine as the example, the numerical simulation and the site test combined method were applied to the study on the top coal caving technique. The study results showed that the downward equivalent coal caving method with an interval in between two caving operations would be favorable to keep the stability of the powered supports in the coal mining face, but the coal mining recovery rate of the coal mining face would be lower. With the upward equivalent coal caving method with an interval in between the two caving operations, the coal mining recovery rate could be higher, but the powered supports in middle and top sections of the mining face would be easy to lose stability. The twice mining circulars and a top coal caving technique with a coal caving circular distance of 1.2 m would have a higher coal recovery rate, would have less coal rejects in the raw coal and would be favorable to the stability of the powered supports. Therefore, the downward equivalent coal caving method with a interval between two mining circulars would be applied to the up section of the coal mining face and the upward equivalent coal caving method with a interval between two mining circulars would be applied to the middle and lower sections of the coal mining face. The coal caving distance would be 1.2 m and the coal mining recovery rate could be reached to 82. 27%.

关 键 词：大倾角 综放开采 放煤工艺 数值分析 

分 类 号：TD325[矿业工程—矿井建设]