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| 大倾角厚煤层综放开采颗粒元分析 | |
| 引用本文： | 王树仁,王金安,刘淑宏,吴顺川,谢俊文.大倾角厚煤层综放开采颗粒元分析[J].北京科技大学学报,2006,28(9):808-811,817. |
| 作者姓名： | 王树仁 王金安 刘淑宏 吴顺川 谢俊文 |
| 作者单位： | 1. 燕山大学建筑工程与力学学院,秦皇岛,066004;北京科技大学土木与环境工程学院,北京,100083 2. 北京科技大学土木与环境工程学院,北京,100083 3. 东北大学秦皇岛分校,秦皇岛,066004 |
| 基金项目： | 高等学校博士学科点专项科研项目 |
| 摘 要： | 应用PFC2D计算程序,对某矿水平与倾斜联合布置的折线型综采面,分析了散体顶煤和破碎直接顶的落放过程及落放形态,揭示了不同放煤步距连续推进模式下的煤损动态特征,并对不同放煤顺序的顶煤回收率及支架受力工况进行了优化分析. 研究表明:折线型综采面采用自上而下的回采顺序,顶煤回收率高,支架受力均匀;低位单口放煤时,放出体形态向采空区侧偏转;在支架连续推进过程中,煤损形态节律性变化;大倾角厚煤层综放开采,采用中档放煤步距的经济技术效果较好. |
| 关 键 词： | 大倾角厚煤层 综采放顶煤 散体介质 运移特征 数值模拟 大倾角 厚煤层 综放开采 颗粒 元分析 thick seam analysis flow 技术效果 经济 节律性变化 推进过程 偏转 采空区 放出体 单口 均匀 支架受力 回采顺序 自上而下 |
| 收稿时间： | 2005-06-27 |
| 修稿时间： | 2005-06-272006-03-20 |
Particle flow analysis on mechanized top-coal caving in steep thick seam |
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| WANG Shuren,WANG Jinan,LIU Shuhong,WU Shunchuan,XIE Junwen.Particle flow analysis on mechanized top-coal caving in steep thick seam[J].Journal of University of Science and Technology Beijing,2006,28(9):808-811,817. | |
| Authors: | WANG Shuren WANG Jinan LIU Shuhong WU Shunchuan XIE Junwen |
| Institution: | 1 School of Civil Engineering and Mechanics, Yanshan University, Qinhuangdao 066004, China 2. Civil and Environmental Engineering School, University of Science and Technology Beijing, Beijing 100083, China 3. Northeastern University at Qinhuangdao, Qinhuangdao 066004, China |
| Abstract: | By using PFC^2D technique, the falling and moving process of top-coal and rock, and the flowing characteristics of loose medium in the process of top-coal caving in steep thick seam were analyzed for the horizontal and inclining compound working face arrangement of a coal mine by different recovering distances. The recovery of top-coal and the force characteristics of the powered supports for the top-coal caving working face by different caving sequences were discussed. The results showed that, firstly, the recovery of top-coal was high and the force characteristic of the powered supports for top-coal caving was good by adopting the top-to-down caving sequence. Secondly, the falling and moving configuration of loose medium was deflected toward the mined direction. Thirdly, the characteristic of lost coal in the process of top-coal caving was present with a particular rhythm. At last, the optimal caving distance was 1.2 m in all the conditions. |
| Keywords: | steep thick seam mechanized top-coal caving loose medium movement character numerical simulation |
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