Volume 48 Issue 2
Mar.  2022
Turn off MathJax
Article Contents
Article Navigation >  Journal of Mine Automation  > 2022  >  48(2): 61-69
SUN Qiang, SHAN Chengfang, LI Yafeng, et al. Analysis of coal drawing law and parameter research in shallow buried double hard and extra-thick coal seam[J]. Industry and Mine Automation, 2022, 48(2): 61-69. doi: 10.13272/j.issn.1671-251x.2021070054
Citation: SUN Qiang, SHAN Chengfang, LI Yafeng, et al. Analysis of coal drawing law and parameter research in shallow buried double hard and extra-thick coal seam[J]. Industry and Mine Automation, 2022, 48(2): 61-69. doi: 10.13272/j.issn.1671-251x.2021070054
shu

Analysis of coal drawing law and parameter research in shallow buried double hard and extra-thick coal seam

doi: 10.13272/j.issn.1671-251x.2021070054

  • 1. School of Mines, China University of Mining and Technology, Xuzhou 221116, China;

  • 2. Kuqa Yushuling Coal Mine Co., Ltd., Aksu 843300, China

  • Received Date: 2021-07-19
  • Rev Recd Date: 2022-02-06
    • Available Online: 2022-03-01
    Abstract
  • The coal resources in Xinjiang are shallowly buried, the coal seam is thick, resulting in poor top coal caving and drawing. And the roof is overhanging in a large area, which makes it impossible to achieve safe and efficient top coal mining. And at present, there are few related researches on efficient coal drawing in fully mechanized working face of shallow buried double hard and extra thick coal seam. In order to solve the above problems, taking 110501 fully mechanized working face of Yushuling Coal Mine as engineering background, the paper studies the coal drawing law of shallow buried double hard and extra thick coal seam, so as to determine reasonable mining-drawing rate and coal drawing technology, and improve the recovery rate. FLAC3D software is used to analyze the coal and rock failure law in the mining process of fully mechanized working face, so as to design reasonable mining-drawing ratio. The results are listed as follows. ① With the increase of the mining height of the working face, the yield failure coefficient of the top coal and the coal wall continues to increase, and the maximum value of the advance support stress and the affected area of the coal wall on the working face gradually increase. ② Considering the stability and caving and drawing of top coal and coal wall, the designed mining height is 4.0 m, the top coal drawing height is 4.6 m, and the mining-drawing ratio is 1∶1.15. The top coal drawing law of fully mechanized working face is analyzed by using PFC2D software, so as to design reasonable coal drawing technology (including the design of coal drawing step distance and coal drawing mode). The results are listed as follows. ① The gangue content of ‘one coal mining and one top coal drawing’ is higher than that of ‘two coal mining and one top coal drawing’ and ‘three coal mining and one top coal drawing’, but the overall drawing rate is higher than that of ‘two coal mining and one top coal drawing’ and ‘three coal mining and one top coal drawing’ due to the small coal drawing step distance. Therefore, the coal drawing step distance of ‘one coal mining and one top drawing’ is selected. ② Compared with two rounds coal drawing, single round coal drawing has higher coal drawing speed, but gangue content is higher and coal drawing rate is lower. Compared with two rounds sequential coal drawing, the two rounds interval coal drawing has a higher drawing rate. Therefore, the tow rounds interval coal drawing method is selected. The designed mining drawing rate and coal drawing process are applied to the engineering practice of 110501 fully mechanized working face, the results show that the top coal drawing rate of this working face is 82%-87%, the average drawing rate is higher than 82%, and the coal drawing effect is good.

     

    • FullText(HTML)
  • loading
    • References(20)
  • [1]
    杨俊哲.浅埋坚硬厚煤层预采顶分层综放技术研究[J].煤炭学报,2017,42(5):1108-1116.

    YANG Junzhe.Research on fully mechanized caving mining technology of pre mining top slicing in shallow hard coal seam[J].Journal of China Coal Society,2017,42(5):1108-1116.
    [2]
    庞义辉,王国法.坚硬特厚煤层顶煤冒放结构及提高采出率技术[J].煤炭学报,2017,42(4):817-824.

    PANG Yihui,WANG Guofa.Top-coal caving structure and technology for increasing recovery rate at extra-thick hard coal seam[J].Journal of China Coal Society,2017,42(4):817-824.
    [3]
    韩哲,赵铁林,解兴智.提高浅埋坚硬特厚煤层顶煤冒放性技术研究[J].煤矿开采,2016,21(1):18-20.

    HAN Zhe,ZHAO Tielin,XIE Xingzhi.Technology of improving top coal caving property in hard thick coal seam with shallow mining depth[J].Coal Mining Technology,2016,21(1):18-20.
    [4]
    许永祥,王国法,张传昌,等.特厚坚硬煤层超大采高综放开采合理采高研究与实践[J].采矿与安全工程学报,2020,37(4):715-722.

    XU Yongxiang,WANG Guofa,ZHANG Chuanchang,et al. lnvestigation and practice of the reasonable cutting height at longwall top coal caving face with super-large mining height in hard and extra-thick coal seams[J].Journal of Mining & Safety Engineering,2020,37(4):715-722.
    [5]
    解兴智,赵铁林.浅埋坚硬特厚煤层综放开采顶煤冒放结构分析[J].煤炭学报,2016,41(2):359-366.

    XIE Xingzhi,ZHAO Tielin.Analysis on the top-coal caving structure of extra-thick hard coalseam with shallow depth in fully mechanized sublevel caving mining[J].Journal of China Coal Society,2016,41(2):359-366.
    [6]
    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,2019,44(9):2632-2640.

    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,2019,44(9):2632-2640.
    [7]
    朱帝杰,陈忠辉,常远,等.基于随机介质理论的综放开采顶煤放出规律研究[J].煤炭科学技术,2018,46(1):167-174.

    ZHU Dijie,CHEN Zhonghui,CHANG Yuan,et al.Study on top coal caving law of fully-mechanized top coal caving mining based on random medium theory[J].Coal Science and Technology,2018,46(1):167-174.
    [8]
    王家臣,张锦旺,陈祎.基于BBR体系的提高综放开采顶煤采出率工艺研究[J].矿业科学学报,2016,1(1):38-48.

    WANG Jiachen,ZHANG Jinwang,CHEN Yi.Research on technology of improving top-coal recovery in longwall top-coal caving mining based on BBR system[J].Journal of Mining Science and Technology,2016,1(1):38-48.
    [9]
    孙利辉,纪洪广,蔡振禹,等.大倾角厚煤层综放工作面放煤工艺及顶煤运动特征试验[J].采矿与安全工程学报,2016,33(2):208-213.

    SUN Lihui,JI Hongguang,CAI Zhenyu,et al.Top-coal caving process and movement characters of fully mechanized caving face in steeply dipping thick seam[J].Journal of Mining & Safety Engineering,2016, 33(2):208-213.
    [10]
    王家臣,陈祎,张锦旺.基于BBR的特厚煤层综放开采放煤方式优化研究[J].煤炭工程,2016,48(2):1-4.

    WANG Jiachen,CHEN Yi,ZHANG Jinwang.Optimization study on drawing technique of longwall top-coal caving in extra-thick coal seam based on BBR system[J].Coal Engineering,2016,48(2):1-4.
    [11]
    曹卫军.特厚硬煤层优化采放工艺参数研究[J].能源技术与管理,2020,45(1):70-72.

    CAO Weijun.Study on optimal mining and caving process parameters of extra thick hard coal seam[J].Energy Technology and Management,2020,45(1):70-72.
    [12]
    刘振兴.矿井综放工作面关键参数模拟确定分析[J].山西化工,2018,38(4):163-166.

    LIU Zhenxing.Simulation and determination of key parameters of fully-mechanized caving face in coal mine[J].Shanxi Chemical Industry,2018,38(4):163-166.
    [13]
    王家臣.我国放顶煤开采的工程实践与理论进展[J].煤炭学报,2018,43(1):43-51.

    WANG Jiachen.Engineering practice and theoretical progress of top-coal caving mining technology in China[J].Journal of China Coal Society,2018,43(1):43-51.
    [14]
    王家臣,魏立科,张锦旺,等.综放开采顶煤放出规律三维数值模拟[J].煤炭学报,2013,38(11):1905-1911.

    WANG Jiachen,WEI Like,ZHANG Jinwang,et al.3D numerical simulation on the top-coal movement law under caving mining technique[J].Journal of China Coal Society,2013,38(11):1905-1911.
    [15]
    刘全,涂敏,付宝杰.综放工作面采放比对顶煤采出率影响规律研究[J].煤炭科学技术,2013,41(3):55-58.

    LIU Quan,TU Min,FU Baojie.Study on mining and caving ratio of fully mechanized top coal caving mining face affected to top coal recovery rate[J].Coal Science and Technology,2013,41(3):55-58.
    [16]
    孙臣良,张峰.基于FLAC3D的厚煤层合理采放比的确定方法研究[J].计算机应用与软件,2013,30(1):203-205.

    SUN Chenliang,ZHANG Feng.Research on determination method of reasonable mining and caving ratio for thick coal seam based on FLAC3D[J].Computer Applications and Software,2013,30(1):203-205.
    [17]
    胡燏.基于PFC2D的综放工作面放煤步距研究[J].中国煤炭,2017,43(3):70-73.

    HU Yu.Research on coal caving step distance at fully mechanized caving face based on PFC2D[J].China Coal,2017,43(3):70-73.
    [18]
    夏洪春,于斌,李伟.大同矿区特厚中硬煤层综放顶煤运移规律研究[J].煤炭技术,2017,36(3):35-38.

    XIA Hongchun,YU Bin,LI Wei.Top coal movement of thick coal seam in fully mechanized top coal caving in Datong Mine[J].Coal Technology,2017,36(3):35-38.
    [19]
    武晓敏.综放工作面顶煤运移及煤矸界面演化规律研究[J].中国煤炭,2015,41(2):63-66.

    WU Xiaomin.Research on the law of top coal movement and coal-gangue interface evolution in fully mechanized caving face[J].China Coal,2015,41(2):63-66.
    [20]
    许力峰,张勇,李立,等.特厚煤层综放开采顶煤放出率影响因素分析[J].煤矿开采,2012,17(6):25-28.

    XU Lifeng,ZHANG Yong,LI Li,et al.Influence factors of top-coal caving ratio in full-mechanized caving mining extremely-thick coal-seam[J].Coal Mining Technology,2012,17(6):25-28.
    • Relative Articles
    • Supplements(0)
    • Cited By
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索
    Get Citation
    PDF
    XML

    Article Metrics

    Article views (119) PDF downloads(14) Cited by()
    Proportional views
    Related

    苏ICP备 05016349号-2

    Supported by: Beijing Renhe Information Technology Co. Ltd.  Visits：    

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return