刘闯, 李化敏, 马占元,等.不同煤厚综放工作面合理放煤工艺数值模拟研究[J].河南理工大学学报（自然科学版）,2023,42(4):40-46.

LIU C, LI H M, MA Z Y,et al.Numerical simulation study on reasonable top coal caving technology in longwall top coal caving working face with different top coal thickness[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(4):40-46.

不同煤厚综放工作面合理放煤工艺数值模拟研究

刘闯1, 李化敏2, 马占元3, 张侦锐1

1.河南工程学院 资源与安全工程学院 河南 郑州  451191;2.河南理工大学 能源科学与工程学院 河南 焦作  454000;3.晋能控股集团，山西 大同  037003

摘要:同忻煤矿8202综放工作面顶煤回收率较低，为提高煤炭资源采出率，利用CDEM建立沿工作面倾向的数值模型，模拟研究综放工作面顶煤厚度分别为4.0，8.0，12.0 m时不同放煤工艺的放煤过程，分析煤矸分界面和顶煤回收率的变化规律，优化不同顶煤厚度条件下放煤工艺参数。结果表明，顶煤一次放出的厚度越大，各放煤口放煤量差异越大，放煤过程中煤矸互层越严重，煤矸分界面越混乱，顶煤回收率越低。对比可知，8202综放工作面采用三轮顺序放煤工艺时顶煤回收率最高。

关键词:综放工作面;煤厚;放煤工艺;顶煤回收率;数值模拟

doi:10.16186/j.cnki.1673-9787.2021120103

基金项目:国家重点研发计划项目（2018YFC0604502）；河南省科技攻关项目（222102220062）；河南省自然科学基金资助项目（232300420334）；河南省高校科技创新团队计划项目（22IRTSTHN009）

收稿日期:2021/12/27

修回日期:2022/10/14

出版日期:2023/07/25

Numerical simulation study on reasonable top coal caving technology in longwall top coal caving working face with different top coal thickness

LIU Chuang1, LI Huamin2, MA Zhanyuan3, ZHANG Zhenrui1

1.School of Resource and Safety Engineering，Henan University of Engineering，Zhengzhou  451191，Henan，China;2.School of Energy Science and Engineering，Henan Polytechnic University，Jiaozuo  454000，Henan，China;3.Jinneng Holding Group，Datong  037003，Shanxi，China

Abstract:The recovery rate of top coal in 8202 longwall top coal caving（LTCC）working face of Tongxin coal mine is low.In order to improve the recovery rate of coal resources，a numerical model along the slope of the working face was established by CDEM numerical simulation software.Different top coal caving technology were used to simulate the top coal caving process of the LTCC working face under the top coal thickness of 4.0，8.0，12.0 m，the changes in the coal-gangue interface and the recovery rate of the top coal were compared and analyzed，and the reasonable coal drawing process parameters under different top coal thickness were optimized.The results showed that the greater the thickness of the top coal caving at one time was，the greater the difference in the amount of top coal caving at each caving window was，the more serious the coal-gangue interbedding was，the more chaotic the coal-gangue interface was and the lower top coal recovery rate was.Through analysis and comparison，it was concluded that the top coal recovery rate of 8202 LTCC working face was the largest under the three-round sequential top coal caving technology.

Key words:longwall top coal caving working face;coal thickness;coal caving technology;top coal recovery rate;numerical simulation

不同煤厚综放工作面合理放煤工艺数值模拟研究_刘闯.pdf