留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码

加卸载煤体损伤-渗透特性影响因素实验研究

徐超 秦亮亮 李晓敏 杨港 孙浩石

徐超, 秦亮亮, 李晓敏, 杨港, 孙浩石. 加卸载煤体损伤-渗透特性影响因素实验研究[J]. 矿业科学学报, 2021, 6(3): 280-289. doi: 10.19606/j.cnki.jmst.2021.03.004
引用本文: 徐超, 秦亮亮, 李晓敏, 杨港, 孙浩石. 加卸载煤体损伤-渗透特性影响因素实验研究[J]. 矿业科学学报, 2021, 6(3): 280-289. doi: 10.19606/j.cnki.jmst.2021.03.004
Xu Chao, Qin Liangliang, Li Xiaomin, Yang Gang, Sun Haoshi. Experimental study on influence factors in damage-permeability characteristics of loading and unloading coal[J]. Journal of Mining Science and Technology, 2021, 6(3): 280-289. doi: 10.19606/j.cnki.jmst.2021.03.004
Citation: Xu Chao, Qin Liangliang, Li Xiaomin, Yang Gang, Sun Haoshi. Experimental study on influence factors in damage-permeability characteristics of loading and unloading coal[J]. Journal of Mining Science and Technology, 2021, 6(3): 280-289. doi: 10.19606/j.cnki.jmst.2021.03.004

加卸载煤体损伤-渗透特性影响因素实验研究

doi: 10.19606/j.cnki.jmst.2021.03.004
基金项目: 

国家自然科学基金 51974321

国家自然科学基金 51874314

国家自然科学基金 51774292

详细信息
    作者简介:

    徐超(1988—),男,山东泰安人,副教授,工学博士,主要从事瓦斯动力灾害、煤层气安全高效开采等方面的研究工作。Tel: 18811397939,E-mail: xuchao@cumtb.edu.cn

  • 中图分类号: TD712

Experimental study on influence factors in damage-permeability characteristics of loading and unloading coal

  • 摘要: 深部煤层开采过程中,多重因素影响着煤体损伤-渗透特性。为揭示采动煤体损伤-渗透特性演化规律,开展了不同工程条件代表的恒围压加轴压(路径1)、恒轴压卸围压(路径2)和同时加轴压卸围压(路径3)3种力学路径下煤体损伤-渗透实验,分析加卸载方式、轴压加载速率、围压卸荷速率以及围压等因素对型煤煤体损伤-渗透特性的影响规律。结果表明,不同加卸载方式显著影响着试样损伤程度,按严重程度排序依次是:路径1<路径2<路径3;试样的抗压强度随加卸载速率的增高而较快达到,损伤程度和渗透率增幅却随之增高;随着围压的增高,损伤的时间响应变慢,渗透率最终恢复程度降低,煤体的损伤、渗透特性具有显著的围压效应。能量累计量随时间的变化呈指数函数关系,损伤扩容后相对渗透率k/k0呈幂函数关系。
  • 图  1  实验系统原理

    Figure  1.  Principle of experimental system

    图  2  加卸载方式对煤体损伤-渗透特性影响规律

    Figure  2.  Influence of loading and unloading modes on coal damage-permeability characteristics

    图  3  加载速率对煤体损伤-渗透特性影响规律

    Figure  3.  Influence of loading rate on coal damage-permeability characteristics

    图  4  卸荷速率对煤体损伤-渗透特性影响规律

    Figure  4.  Influence of unloading rate on coal damage-permeability characteristic

    图  5  围压对煤体损伤-渗透特性影响规律

    Figure  5.  Influence of confining pressure on coal damage-permeability characteristics

    图  6  煤层开采过程中采动煤岩体应力状态

    Figure  6.  Stress state of coal and rock mass during coal mining

    表  1  实验参数

    Table  1.   Experimental program parameters

    力学路径编号瓦斯压力/MPa初始围压/MPa初始轴压/MPa围压卸荷速率/(N·s-1)轴压加载速率/(N·s-1)
    恒围压加轴压
    (路径1)
    1-113--80
    1-215--40
    1-315--80
    1-415--120
    1-517--80
    恒轴压卸围压
    (路径2)
    2-11712.510-
    2-21712.515-
    2-31712.520-
    2-417510-
    同时加轴压卸围压
    (路径3)
    3-11751040
    3-21751080
    3-317510120
    3-41751580
    3-51752080
    下载: 导出CSV

    表  2  不同卸载条件下AE信号、渗透率与时间的关系

    Table  2.   The relationship between AE, permeability and time under loading-unloading conditions

    实验
    编号
    扩容点时刻t0/s能量累计量E /104 aJ相对渗透率k/k0
    拟合公式拟合系数拟合公式拟合系数
    1-1383E=0.0035e0.0127(t-t0)0.733 9k/k0=0.18(t-t0)0.26130.770 6
    1-2626E=0.061e0.0017(t-t0)0.941 9k/k0=0.539(t-t0)0.06640.850 3
    1-3471E=0.0397e0.0061(t-t0)0.775 9k/k0=0.5096(t-t0)0.07770.820 8
    1-4507E=0.0224e0.0103(t-t0)0.879 6k/k0=0.6303(t-t0)0.0440.998 3
    1-5838E=0.0621e0.0017(t-t0)0.978 6k/k0=0.4996(t-t0)0.07370.967 5
    2-1586E=0.581e0.0032(t-t0)0.905 0k/k0=0.0937(t-t0)0.42140.965 3
    2-2639E=4.6135e0.0051(t-t0)0.921 6k/k0=0.1033(t-t0)0.43530.993 9
    2-3655E=4.8007e0.0068(t-t0)0.927 1k/k0=0.0737(t-t0)0.54180.995 7
    2-4575E=0.0683e0.0051(t-t0)0.923 6k/k0=0.1272(t-t0)0.38920.956 6
    3-1326E=0.0774e0.0057(t-t0)0.700 7k/k0=0.0892(t-t0)0.50350.979 5
    3-2239E=0.0593e0.0091(t-t0)0.974 4k/k0=0.1162(t-t0)0.40390.983 2
    3-3189E=0.0389e0.0153(t-t0)0.964 5k/k0=0.1243(t-t0)0.43590.968 5
    3-4233E=0.0201e0.01(t-t0)0.979 4k/k0=0.1076(t-t0)0.42290.809 5
    3-5244E=0.0345e0.006(t-t0)0.977 1k/k0=0.143(t-t0)0.45620.889 3
    下载: 导出CSV
  • [1] 何满潮, 谢和平, 彭苏萍, 等. 深部开采岩体力学研究[J]. 岩石力学与工程学报, 2005, 24(16): 2803-2813. doi: 10.3321/j.issn:1000-6915.2005.16.001

    He Manchao, Xie Heping, Peng Suping, et al. Study on rock mechanics in deep mining engineering[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(16): 2803-2813. doi: 10.3321/j.issn:1000-6915.2005.16.001
    [2] 蔡永博, 王凯, 徐超. 煤岩单体及原生组合体变形损伤特性对比试验研究[J]. 矿业科学学报, 2020, 5(3): 278-283. http://kykxxb.cumtb.edu.cn/article/id/290

    Cai Yongbo, Wang Kai, Xu Chao. Comparative experimental study on deformation and damage characteristics of single coal rock and primary coal-rock combination[J]. Journal of Mining Science and Technology, 2020, 5(3): 278-283. http://kykxxb.cumtb.edu.cn/article/id/290
    [3] 齐庆新, 潘一山, 李海涛, 等. 煤矿深部开采煤岩动力灾害防控理论基础与关键技术[J]. 煤炭学报, 2020, 45(5): 1567-1584. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB202005003.htm

    Qi Qingxin, Pan Yishan, Li Haitao, et al. Theoretical basis and key technology of prevention and control of coal-rock dynamic disasters in deep coal mining[J]. Journal of China Coal Society, 2020, 45(5): 1567-1584. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB202005003.htm
    [4] 彭杨皓, 杨捷, 程晋国, 等. 煤矿大断面托顶煤巷道变形机理及控制技术研究[J]. 矿业科学学报, 2017, 2(5): 439-448. http://kykxxb.cumtb.edu.cn/article/id/94

    Peng Yanghao, Yang Jie, Cheng Jinguo, et al. Deformation mechanism and control technology of large section gateway with top coal in coal mine[J]. Journal of Mining Science and Technology, 2017, 2(5): 439-448. http://kykxxb.cumtb.edu.cn/article/id/94
    [5] Xue Y, Gao F, Liu X G. Effect of damage evolution of coal on permeability variation and analysis of gas outburst hazard with coal mining[J]. Natural Hazards, 2015, 79(2): 999-1013. doi: 10.1007/s11069-015-1888-2
    [6] 徐超, 王硕, 王一然, 等. 加卸载速率对含瓦斯煤损伤-渗透时效特性影响试验研究[J]. 煤炭科学技术, 2018, 46(5): 93-101. https://www.cnki.com.cn/Article/CJFDTOTAL-MTKJ201805015.htm

    Xu Chao, Wang Shuo, Wang Yiran, et al. Experiments study on effects of loading and unloading rates on damage-permeability aging characteristics of gas-bearing coal[J]. Coal Science and Technology, 2018, 46(5): 93-101. https://www.cnki.com.cn/Article/CJFDTOTAL-MTKJ201805015.htm
    [7] Du F, Wang K, Wang G D, et al. Investigation of the acoustic emission characteristics during deformation and failure of gas-bearing coal-rock combined bodies[J]. Journal of Loss Prevention in the Process Industries, 2018, 55: 253-266. doi: 10.1016/j.jlp.2018.06.013
    [8] 栗婧, 关城, 汪振, 等. 型煤受载破坏表面电荷和微震响应特征及相关性分析[J]. 矿业科学学报, 2020, 5(2): 179-186. http://kykxxb.cumtb.edu.cn/article/id/278

    Li Jing, Guan Cheng, Wang Zhen, et al. Analysis of surface transient charge and the interdependent response of microseismic signal during the deformation of coal[J]. Journal of Mining Science and Technology, 2020, 5(2): 179-186. http://kykxxb.cumtb.edu.cn/article/id/278
    [9] 姜永东, 李业, 崔悦震, 等. 声场作用下煤储层渗透性试验研究[J]. 煤炭学报, 2017, 42(S1): 154-159. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB2017S1020.htm

    Jiang Yongdong, Li Ye, Cui Yuezhen, et al. Experimental study on characteristics of coal reservoir permeability under acoustic wave[J]. Journal of China Coal Society, 2017, 42(S1): 154-159. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB2017S1020.htm
    [10] 刘永茜. 循环载荷作用下煤体渗透率演化的实验分析[J]. 煤炭学报, 2019, 44(8): 2579-2588. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201908033.htm

    Liu Yongqian. Experimental analysis of coal permeability evolution under cyclic loading[J]. Journal of China Coal Society, 2019, 44(8): 2579-2588. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201908033.htm
    [11] 徐超, 付强, 王凯, 等. 载荷方式对深部采动煤体损伤-渗透时效特性影响实验研究[J]. 中国矿业大学学报, 2018, 47(1): 197-205. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGKD201801025.htm

    Xu Chao, Fu Qiang, Wang Kai, et al. Effects of the loading methods on the damage-permeability aging characteristics of deep mining coal[J]. Journal of China University of Mining & Technology, 2018, 47(1): 197-205. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGKD201801025.htm
    [12] 李东印, 王文, 李化敏, 等. 重复加-卸载条件下大尺寸煤样的渗透性研究[J]. 采矿与安全工程学报, 2010, 27(1): 121-125. doi: 10.3969/j.issn.1673-3363.2010.01.023

    Li Dongyin, Wang Wen, Li Huamin, et al. Research on permeability of large-sized coal sample in loading and unloading test[J]. Journal of Mining & Safety Engineering, 2010, 27(1): 121-125. doi: 10.3969/j.issn.1673-3363.2010.01.023
    [13] 王辰霖, 张小东, 李贵中, 等. 循环加卸载作用下不同高度煤样渗透性试验研究[J]. 岩石力学与工程学报, 2018, 37(10): 2299-2308. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201810011.htm

    Wang Chenlin, Zhang Xiaodong, Li Guizhong, et al. Experimental study on the permeability of coal samples with different heights under cyclic loading and unloading[J]. Chinese Journal of Rock Mechanics and Engineering, 2018, 37(10): 2299-2308. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201810011.htm
    [14] 薛燕光, 张东明, 杨玉顺, 等. 三种应力作用下含瓦斯原煤渗透性分析[J]. 矿业安全与环保, 2020, 47(3): 22-26, 31. https://www.cnki.com.cn/Article/CJFDTOTAL-ENER202003005.htm

    Xue Yanguang, Zhang, Dongming, Yang Yushun, et al. Permeability analysis of gassy raw coal under three stresses[J]. Mining Safety & Environmental Protection, 2020, 47(3): 22-26, 31. https://www.cnki.com.cn/Article/CJFDTOTAL-ENER202003005.htm
    [15] Yang D S, Qi X Y, Chen W Z, et al. Anisotropic permeability of coal subjected to cyclic loading and unloading[J]. International Journal of Geomechanics, 2018, 18(8): 04018093. doi: 10.1061/(ASCE)GM.1943-5622.0001229
    [16] Chen H D, Cheng Y P, Ren T X, et al. Permeability distribution characteristics of protected coal seams during unloading of the coal body[J]. International Journal of Rock Mechanics And Mining Sciences, 2014, 71: 105-116. doi: 10.1016/j.ijrmms.2014.03.018
    [17] Chen H D, Cheng Y P, Zhou H X, et al. Damage and permeability development in coal during unloading[J]. Rock Mechanics And Rock Engineering, 2013, 46(6): 1377-1390. doi: 10.1007/s00603-013-0370-2
    [18] Jia H Y, Wang K, Xu C, et al. Permeability distribution characteristics of underlying coal seam disturbed by mining activity[J]. Energy Sources, Part A: Recovery, Utilization, And Environmental Effects, 2019: 1-16. http://www.researchgate.net/publication/335347110_Permeability_distribution_characteristics_of_underlying_coal_seam_disturbed_by_mining_activity
    [19] 徐超. 岩浆岩床下伏含瓦斯煤体损伤渗透演化特性及致灾机制研究[D]. 徐州: 中国矿业大学, 2015.
    [20] 尹光志, 王登科, 张东明, 等. 两种含瓦斯煤样变形特性与抗压强度的实验分析[J]. 岩石力学与工程学报, 2009, 28(2): 410-417. doi: 10.3321/j.issn:1000-6915.2009.02.027

    Yin Guangzhi, Wang Dengke, Zhang Dongming, et al. Test analysis of deformation characteristics and compressive strengths of two types of coal specimens containing gas[J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(2): 410-417. doi: 10.3321/j.issn:1000-6915.2009.02.027
  • 加载中
图(6) / 表(2)
计量
  • 文章访问数:  808
  • HTML全文浏览量:  235
  • PDF下载量:  25
  • 被引次数: 0
出版历程
  • 收稿日期:  2020-11-15
  • 修回日期:  2021-01-09
  • 刊出日期:  2021-06-01

目录

    /

    返回文章
    返回