综放工作面多放煤口协同放煤方法

刘闯, 李化敏, 周 英, 李东印

刘闯, 李化敏, 周 英, 等. 综放工作面多放煤口协同放煤方法[J]. 煤炭学报, 2019, (9). DOI: 10.13225/j.cnki.jccs.2018.1278
引用本文: 刘闯, 李化敏, 周 英, 等. 综放工作面多放煤口协同放煤方法[J]. 煤炭学报, 2019, (9). DOI: 10.13225/j.cnki.jccs.2018.1278
LIU Chuang, LI Huamin, ZHOU Ying, et al. Method of synergetic multi-windows caving in longwall top coal caving working face[J]. Journal of China Coal Society, 2019, (9). DOI: 10.13225/j.cnki.jccs.2018.1278
Citation: LIU Chuang, LI Huamin, ZHOU Ying, et al. Method of synergetic multi-windows caving in longwall top coal caving working face[J]. Journal of China Coal Society, 2019, (9). DOI: 10.13225/j.cnki.jccs.2018.1278

综放工作面多放煤口协同放煤方法

Method of synergetic multi-windows caving in longwall top coal caving working face

  • 摘要: 针对当前综放工作面存在顶煤采出率低、混矸率高、放煤效率低等问题,提出综放工作面多 放煤口协同放煤方法。 根据给出的综放工作面多放煤口协同放煤方法的定义,以理论分析和数值 模拟为手段,研究了多放煤口放煤条件下,起始放煤、中间放煤和末端放煤 3 个阶段的放煤方法和 煤岩分界面特征,提出“多放煤口同时开启逆次关闭”的起始放煤方法。 根据放煤口放煤的影响范 围,以及顶煤冒落过程中的速度方程和顶煤颗粒移动方程,建立了多放煤口起始放煤方式的算法模 型,理论上推导出起始放煤过程中放煤间隔时间差的计算方法,为起始放煤方法的应用提供了方 法。 通过分析综放工作面的特点,得出综放工作面顶板稳定性、瓦斯浓度、后部刮板输送机运输能 力、粉尘浓度、工作面采放协调等是影响和限制放煤口数量的主要因素。 以同忻煤矿 8202 综放工 作面煤层条件为例,建立沿工作面方向的数值模拟模型,模拟并对比不同的单放煤口放煤方式和不 同放煤口数量的多放煤口放煤的放煤规律、顶煤采出率和放煤效率,得出在多放煤口放煤条件下, 放煤过程中的煤岩分界面相对平滑,顶煤采出率随同时打开的放煤口数量增加而增大。 多放煤口 放煤效率是单放煤口放煤效率的4~8倍,多放煤口放煤的顶煤采出率比单放煤口高 5% 左右。
    Abstract: In terms of the problems of low top coal recovery rate,high gangue mixing rate and low top coal caving effi- ciency in longwall top coal caving working face,the method of synergetic multi-windows caving was put forward in this paper. Based on the definition of synergetic multi-windows caving method,by means of theoretical analysis and numeri- cal simulation,the top coal caving method and the characteristics of coal rock mass interface at three stages top coal caving including initial stage top coal caving,intermediate stage top coal caving and end stage top coal caving were studied under the conditions of synergetic multi-windows top coal caving. The initial stage top coal caving method of “open window at the same time and close window in reverse” was proposed. According to the influence range of coal caving at the coal caving point,the velocity and movement equation of top coal particle during the caving process of top coal,an algorithm model for the initial stage top coal caving method was established,and the calculation method of the time intervals among caving windows in the initial stage caving process was deduced theoretically,which provides a method for the application of the initial stage top coal caving method. By analyzing the characteristics of fully mechanized caving face,it was concluded that roof stability,gas concentration,the transport capacity of rear scraper convey- or,dust concentration and coordination of mining and caving in longwall top coal caving working face are the main fac- tors affecting and limiting the number of caving windows which are opened at the same time with synergetic multi-win- dows caving method. Taking the coal seam conditions of the 8202 longwall top coal caving working face in Tongxin Coal Mine as an example,a numerical simulation model along the advance direction of the working face was set up to simulate and compare the top coal caving laws,top coal recovery rate and the top coal caving efficiency of the different top coal caving methods. It was concluded that under the condition of multi-windows top coal caving method,the coal- gangue interface is relatively smooth in the process of top coal caving,and the top coal recovery rate increases with the increase of the number of caving windows at the same time,and the efficiency of the multi-windows top coal caving method is 4-8 times as much as the single-window,and the top coal recovery rate of the multi-windows caving method is 5% higher than that of the single-window.
  • 期刊类型引用(17)

    1. 单鹏飞,杨通,孙浩强,郗博佳. 混合煤矸放落态势特征研究. 工矿自动化. 2024(09): 66-74 . 百度学术
    2. 李猛 ,魏炜杰 ,张鑫 . 特厚煤层综放开采多口同时放煤三维实验研究. 矿业科学学报. 2023(02): 180-189 . 百度学术
    3. 王祖洸,王伸,贺子盎,李化敏. 特厚煤层连续群组放煤方法初始顶煤放出规律研究. 矿业科学学报. 2023(02): 166-179 . 百度学术
    4. 李东印,王耀闯,王伸,朱时廷,王祖洸. 特厚煤层综放开采顶煤遗失机理及放煤步距优化数值模拟研究. 河南理工大学学报(自然科学版). 2023(02): 1-10 . 百度学术
    5. 闫少宏,申宇鹏. 综放开采冒落顶煤体堆积状态与放出率定量化研究. 采矿与安全工程学报. 2023(04): 656-667 . 百度学术
    6. 宋刚. 富夹矸近距离煤层合并综放开采合理机采高度研究. 山西煤炭. 2023(03): 38-44 . 百度学术
    7. 崔耀,吴景红,叶壮,张森浪. 高瓦斯综放工作面智能放煤关键技术研究与应用. 煤炭科学技术. 2023(10): 252-265 . 百度学术
    8. 郑苛苛,韩彬,魏宏伟,张加齐,刘县委,杨发军,张阳,张靖凯. 浅埋双硬煤层综放面关键设备选型配套研究. 煤. 2022(01): 8-15+92 . 百度学术
    9. 杨艺,高阳,罗开成,王科平,费树岷. 基于YADE的综放工作面进刀放煤三维仿真. 煤矿安全. 2022(01): 167-173 . 百度学术
    10. 孙强,单成方,李亚锋,王坚坚,张昊,张加齐,武中亚. 浅埋双硬特厚煤层放煤规律分析及参数研究. 工矿自动化. 2022(02): 61-69 . 百度学术
    11. 张文辉,李东印,王伸,李化敏,朱时廷,孙凯旋,张伟宇. 特厚煤层顶煤渐进破坏的块体-颗粒耦合模拟研究. 河南理工大学学报(自然科学版). 2022(06): 24-35 . 百度学术
    12. 杨艺,李庆元,李化敏,李东印,杨延麟,费树岷. 基于批量式强化学习的群组放煤智能决策研究. 煤炭科学技术. 2022(10): 188-197 . 百度学术
    13. 贺海涛,王佳豪,张海峰,荣耀,崔耀. 基于U-Net的放煤状态控制关键技术研究. 煤炭科学技术. 2022(S2): 237-243 . 百度学术
    14. 宋选民,朱德福,王仲伦,霍昱名,刘一扬,刘国方,曹健洁,李昊城. 我国煤矿综放开采40年:理论与技术装备研究进展. 煤炭科学技术. 2021(03): 1-29 . 百度学术
    15. 郝利生. 斜沟煤矿提升顶煤回收率技术实践. 煤. 2021(05): 4-5+43+94 . 百度学术
    16. 张骞. 麻家梁4号煤层综放开采放煤方法优化研究. 煤. 2021(05): 33-34 . 百度学术
    17. 王伸,黄贞宇,李东印,张伟宇,王祖洸,李化敏. 特厚煤层分组间隔放煤顶煤运移规律研究. 煤炭科学技术. 2021(09): 17-24 . 百度学术

    其他类型引用(15)

图(11)
计量
  • 文章访问数:  804
  • HTML全文浏览量:  4
  • PDF下载量:  203
  • 被引次数: 32
出版历程
  • 网络出版日期:  2023-04-10
  • 发布日期:  2019-09-29

目录

    /

    返回文章
    返回
    x 关闭 永久关闭