乌东煤矿水平分段综放开采合理放煤工艺研究

doi:10. 11799/ ce202505002

摘要/Abstract

摘要：

乌东煤矿+443 m B3-6工作面为近直立特厚煤层水平分段综放工作面，为提高综放工作面顶煤回收率与回采效率，采用理论分析、数值模拟等方法，对乌东煤矿+443 m B3-6工作面不同放煤轮次下的顶煤运移特征进行了研究与分析。结果表明：采用多轮放煤能够降低放煤高度，使得放煤后所形成煤岩分界面平缓下移，削弱工作面中部煤岩分界面滞后发育特征，能有利于扩大放出体与煤岩分界面的相切范围，从而提高工作面中部顶煤回收率；随着放煤轮数的增加，煤岩分界面开始滞后发育的位置越靠后；相较单轮放煤而言，采用三轮及以上放煤时工作面中部残煤大量减少；多轮放煤能够明显减少工作面顶板侧的残煤量，相较单轮放煤而言能够减少50 %以上的顶板侧残煤；对于顶煤回收率而言，多轮放煤能够使得偶数架回收率得到提升，并随着放煤轮数的增加，偶数架顶煤回收率逐渐增加；工作面整体回收率随着放煤轮次的增加呈现先增加后减少的趋势；综合理论分析、数值模拟以及现场施工的情况，乌东煤矿+443 m B3-6工作面应选择三轮间隔放煤工艺来提高顶煤回收率，相较单轮间隔放煤，顶煤回收率可提升2%以上。研究结果为指导乌东煤矿水平分段综放开采的合理放煤选择和提高顶煤回收率提供依据。

关键词:

BBR理论 , 多轮放煤 , 放煤轮数 , 顶煤回收率

Abstract:

The + 443 m B3-6 working face of Wudong Coal Mine is a horizontal section fully-mechanized caving face in nearly vertical extra-thick coal seam. In order to improve the top coal recovery rate and mining efficiency of fully-mechanized caving face, the top coal migration characteristics of + 443 m B3-6 working face in Wudong Coal Mine under different caving rounds were studied and analyzed by means of theoretical analysis and numerical simulation. The results show that the use of multiple rounds of coal caving can reduce the height of coal caving, make the coal-rock interface formed after coal caving move down gently, weaken the lagging development characteristics of the coal-rock interface in the middle of the working face, and help to expand the tangent range between the caving body and the coal-rock interface, so as to improve the top coal recovery rate in the middle of the working face. With the increase of the number of coal caving rounds, the position where the coal-rock interface begins to lag behind is later; compared with single wheel caving, the residual coal in the middle of the working face is greatly reduced when three or more wheels are used. Multi-round coal caving can significantly reduce the amount of residual coal on the roof side of the working face, which can reduce more than 50 % of the residual coal on the roof side compared with single-round coal caving. For the recovery rate of top coal, multiple rounds of coal caving can improve the recovery rate of even frames, and with the increase of the number of coal caving rounds, the recovery rate of even frames of top coal increases gradually; the overall recovery rate of the working face increases first and then decreases with the increase of coal drawing rounds. Based on the comprehensive theoretical analysis, numerical simulation and on-site construction, the + 443 m B3-6 working face of Wudong Coal Mine should choose the three-wheel interval coal caving process to improve the top coal recovery rate. Compared with the single-wheel interval coal caving, the top coal recovery rate can be increased by more than 2 %. The research results provide a basis for guiding the reasonable coal caving selection and improving the recovery rate of top coal in Wudong Coal Mine.

中图分类号:

TD823 " target="_blank">
TD823

张春雷, 万晓航, 张锦旺, 等.

乌东煤矿水平分段综放开采合理放煤工艺研究 [J]. 煤炭工程, 2025, 57(5): 8-16.

参考文献

[1] 王国法，李世军，张金虎，等.筑牢煤炭产业安全奠定能源安全基石[J].中国煤炭,2022,48(07):1-9.
Wang Guofa; Li Shijun; Zhang Jinhu.et al. Ensuring the safety of coal industry to lay the cornerstone of energy security [J]. China Coal,2022,48(07):1-9.
[2] 贺林.乌鲁木齐矿区急倾斜煤层开采地表移动变形规律研究[D].西安科技大学,2008.
He Lin. Study on the Rule of Ground Movement and Deformation in Steep Coal Seam Mining of Urumqi Mining Area [D]. Xi 'an University of Science and Technology,2008.
[3] 王家臣,杨胜利,刘淑琴等.急倾斜煤层开采技术现状与流态化开采构想[J].煤炭科学技术,2022,50(01):48-59.
Wang Jiachen, Yang Shengli, Liu Shuqin et al. Technology status and fluidized mining conception for steeply inclined coal seams [J]. Coal Science and Technology,2022,50(01):48-59.
[4] 姜志刚,关书方,王明强,等.大倾角综放面煤岩分界线不对称分布特征及放煤工艺优化[J].煤炭技术,2023,42(12):104-108.
Jiang Zhigang, Guan Shufang, Wang Mingqiang, et al. Asymmetric Distribution Characteristics of Coal-Rock Boundary and Optimization of Coal Caving Technology in Full Mechanized Caving Face with Large Dip Angle [J]. Coal Technology,2023,42(12):104-108.
[5] 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(04):40-46.
Liu Chuang, Li Huamin, Ma Zhanyuan, 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(04):40-46.
[6] 史占东,王亚军,渠文忠.特厚煤层综放工作面放煤工艺研究及应用[J].煤炭技术,2022,41(12):51-54.
Shi Jandong, Wang Yajun, Qu Wenzhong. Research and Application of Caving Technology in Fully Mechanized Caving Face in Extra-thick Coal Seam [J]. Coal Technology,202,41(12):51-54.
[7] 武建文. 急倾斜水平分段放顶煤顶煤放出规律研究[D]. 西安科技大学，2006：23-33.
Wu Jianwen. Study on TOP Coal Caving of Horizontal Section TOP Caving in Steep Seam [D]. Xi 'an University of Science and Technology, 2006:23-33.
[8] 蒋新军．苇湖梁煤矿急倾斜综采放煤工艺研究[D]. 西安科技大学，2007：28-38.
Jiang Xinjun. Study on Top Coal Caving Technology of Horizontal Section in Steep Seam in Weihuliang [D]. Xi 'an University of Science and Technology, 2007:28-38.
[9] 魏炜杰,陈祎,张锦旺等.水平分段综放开采放煤方式优化研究[J].煤矿安全,2016,47(11):57-60.
Wei Weijie, Chen Yi, Zhang Jinwang et al. Optimization Study for Drawing Mode of Horizontal Subsection Full-mechanized Top-coal Caving [J]. Safety in Coal Mine,2016,47(11):57-60.
[10] Celik, Y.Ozelik. Investigation of the effect of caving height on the efficiency of the longwall top coal caving production method applied in inclined and thick coal seams by physical modeling[J]. International Journal of Rock Mechanics and Mining Sciences 162 (2023) 105304.
[11] Klishin S V, Klishin V I, Opruk G Y. Modeling coal discharge in mechanized steep and thick coal mining[J]. Journal of Mining Science, 2013, 49(6): 932-940.
[12] Klishin V I, Klishin S V. Coal extraction from thick flat and steep beds[J]. Journal of mining science, 2010, 46(2): 149-159.
[13] Klishin S V, Klishin V I. Analysis of coal drawing from high coals in sublevel caving systems[C]//ISRM Regional Symposium-EUROCK 2009. International Society for Rock Mechanics, 29-31 October, 2009. 651-656.
[14] Klishin V I, Klishin S V. Application of discrete element method to the analysis of free-flow outlet of coal from high coals at underground coal mining[C]. //Proceedings of the International Conference on Applications of Computer and Information Sciences to Nature Research. ACM, 2010: 74-78.
[15] 王家臣,张锦旺.综放开采顶煤放出规律的BBR研究[J].煤炭学报,2015,40(03):487-493.
Wang Jiachen, Zhang Jinwang. BBR study of top-coal drawing law in longwall top-coal caving mining [J]. Journal of China Coal Society,2015,40(03):487-493.
[16] 潘卫东,李新源,员明涛等.基于顶煤运移跟踪仪的自动化放煤技术原理及应用[J].煤炭学报,2020,45(S1):23-30.
Pan Weidong, Li Xinyuan, Yuan Mingtao et al. Technology principle and field application of automatic coal drawing based on the top coal tracker [J]. Journal of China Coal Society, 2019,45(S1):23-30. (in Chinese)
[17] 刘俊余,杜永威,于斌,等.酸刺沟煤矿综放工作面放煤工艺优化研究[J].矿业研究与开发,2024,44(04):19-24.
Liu Junyu, Du Yongwei, Yu Bin, et al. Study on Optimization of Coal Caving Process in Fully Mechanized Caving Working Face of suancigou Coal Mine [J]. Mining Research and Development,2024,44(04):19-24.
[18] 刘涛.挖金湾虎龙沟煤业厚煤层采煤工艺优化研究[J].煤矿现代化,2023,32(03):11-14.
Liu Tao. Study on mining technology optimization of thick coal seam in Hulonggou Coal Industry in Jinwan [J]. Coal Mine Modernization,2023,32(03):11-14.
[19] 张鹏鹏.山西晶鑫煤业3217综放工作面放煤工艺优化研究[J].煤炭与化工,2021,44(05):6-8.
Zhang Pengpeng. Study on optimization of coal discharge process at 3217 fully mechanized caving face of Shanxi Jingxin Coal industry [J]. Coal and Chemical Industry,2021,44(05):6-8.
[20] 肖藏岩,郭立稳,王红,等.深部大倾角特厚煤层放顶煤开采研究与实践[J].煤炭工程,2009(04):71-73.
Xiao Zangyan, Guo Li-Wen, Wang Hong, et al. Research and practice of top coal caving in deep and thick coal seam with large dip Angle [J]. Coal Engineering,2009(04):71-73.