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软岩巷道挠曲型底鼓机理与底板桩基控制技术

郭东明 亢鑫超 陆志颖 陈麒宇 张伟 赵志峰 曹延鹏

郭东明, 亢鑫超, 陆志颖, 陈麒宇, 张伟, 赵志峰, 曹延鹏. 软岩巷道挠曲型底鼓机理与底板桩基控制技术[J]. 矿业科学学报, 2021, 6(5): 536-547. doi: 10.19606/j.cnki.jmst.2021.05.003
引用本文: 郭东明, 亢鑫超, 陆志颖, 陈麒宇, 张伟, 赵志峰, 曹延鹏. 软岩巷道挠曲型底鼓机理与底板桩基控制技术[J]. 矿业科学学报, 2021, 6(5): 536-547. doi: 10.19606/j.cnki.jmst.2021.05.003
Guo Dongming, Kang Xinchao, Lu Zhiying, Chen Qiyu, Zhang Wei, Zhao Zhifeng, Cao Yanpeng. Flexural floor heave mechanism and floor corner piles control technology in soft rock roadway[J]. Journal of Mining Science and Technology, 2021, 6(5): 536-547. doi: 10.19606/j.cnki.jmst.2021.05.003
Citation: Guo Dongming, Kang Xinchao, Lu Zhiying, Chen Qiyu, Zhang Wei, Zhao Zhifeng, Cao Yanpeng. Flexural floor heave mechanism and floor corner piles control technology in soft rock roadway[J]. Journal of Mining Science and Technology, 2021, 6(5): 536-547. doi: 10.19606/j.cnki.jmst.2021.05.003

软岩巷道挠曲型底鼓机理与底板桩基控制技术

doi: 10.19606/j.cnki.jmst.2021.05.003
基金项目: 

国家自然科学基金 51974315

详细信息
    作者简介:

    郭东明(1974—),男,江西新余人,博士,教授,主要从事矿井建设方面的教学和研究工作。Tel: 010-62339225,E-mail: dmguocumtb@126.com

    通讯作者:

    亢鑫超(1991—),男,河北涞源人,博士研究生,主要从事巷道支护方面的科研工作。Tel: 15933968256, E-mail: k_xinchao@163.com

  • 中图分类号: TD74

Flexural floor heave mechanism and floor corner piles control technology in soft rock roadway

  • 摘要: 以兴安矿四水平18层南轨道巷为背景,针对高应力条件下软弱底板挠曲型底鼓支护难题,研究了挠曲型底板围岩的破坏特征,提出了钢管混凝土底板桩基支护形式。首先基于板的挠度理论和虚功原理,建立了底板桩基支护条件下挠曲型底板的失稳判据,研究了底板桩基的支护机理。然后通过数值分析方法,研究了设计参数对支护效果的影响及支护后的底板应力分布规律。结果表明,底板围岩的高应力和围岩强度不足是引发巷道底板失稳的主要原因,改善底板围岩应力环境和强化底板围岩是挠曲型底鼓治理的关键; 底板桩基的几何参数和桩间距是决定极限阻隔抗力的关键因素,桩长宜采用0.4 R ~ 0.6 R(R为塑性区半径)嵌固深度,底板桩基钻孔方向应与巷道截面等效圆半径一致或偏向垂直位移方向。根据底板桩基现场应用试验结果,底板桩基对巷道底板围岩的挤压应力有较好的阻隔效果,可较好地控制底板及两帮变形,提高巷道稳定性。该技术可以为类似条件下的巷道底鼓支护提供参考。
  • 图  1  巷道断面和支护结构

    Figure  1.  Roadway section and support structure

    图  2  围岩二次应力计算简图

    Figure  2.  Calculation of secondary stress of surrounding rock

    图  3  巷道切向应力分布

    Figure  3.  Distribution of tangential stress in roadway

    图  4  底板岩体全应力-应变曲线

    Figure  4.  Total stress-strain curve of floor rock mass

    图  5  不同应力环境对塑性区破坏深度影响

    Figure  5.  Influence of different stress environment on the failure depth of plastic zone

    图  6  不同围岩强度参数对塑性深度影响

    Figure  6.  Influence of strength parameters of surrounding rock on plastic depth

    图  7  巷道底鼓计算模型

    Figure  7.  Calculation model of floor heave in roadway

    图  8  底板桩基支护模型

    Figure  8.  Support model of floor corner pile

    图  9  支护状态下底板应力路径

    Figure  9.  Floor stress path under support

    图  10  底板桩基内力计算模型

    Figure  10.  Internal force calculation model of floor corner pile

    图  11  底板桩基极限荷载计算模型

    Figure  11.  Calculation model of ultimate load of floor corner pile

    图  12  支护参数对阻隔应力的影响

    Figure  12.  Influence of support parameters on barrier stress

    图  13  数值计算模型

    Figure  13.  Numerical calculation model

    图  14  结构单元模型

    Figure  14.  Structural element model

    图  15  不同桩长下的底鼓

    Figure  15.  Magnitude of floor heave under different pile lengths

    图  16  不同钻孔角度下的底鼓

    Figure  16.  Floor heave under different borehole angles

    图  17  底板桩基钻孔施工角度

    Figure  17.  Drilling angles of floor corner pile

    图  18  底板围岩应力分布

    Figure  18.  Stress distribution of floor surrounding rock

    图  19  底板桩基现场布置

    Figure  19.  Site layout of floor corner pile

    表  1  围岩力学参数

    Table  1.   Mechanical parameters for coal and rock

    岩层 岩性 厚度/m 普氏系数
    基本顶 中粒砂岩 7.8 2.1
    直接顶 泥质粉砂岩 2.5 1.7
    煤层 3.5 0.9
    直接底 泥岩 3.7 0.3
    基本底 细粒砂岩 4.9 0.5
    下载: 导出CSV

    表  2  围岩力学参数

    Table  2.   Mechanical parameters for surrounding rock

    岩层 密度/(g·cm-3) 黏聚力/MPa 内摩擦角φ/(°) 弹性模量/MPa 泊松比μ
    上覆岩层 2.61 20.00 35 7 000 0.30
    细砂岩 2.75 8.90 33 4 560 0.19
    泥岩 2.51 0.97 26 4 560 0.31
    中砂岩 2.48 4.70 36 4 800 0.27
    下伏岩层 2.61 20.00 38 8 600 0.25
    下载: 导出CSV

    表  3  巷道围岩最大变形统计

    Table  3.   Maximum deformation statistics of roadway surrounding rock

    监测位置 顶板/cm 两帮/cm 底板/cm
    试验段 40 43 35
    对照段 90 41 100
    下降率 55.6% -4.98% 64.94%
    下载: 导出CSV
  • [1] 孙玉宁, 周鸿超, 周建荣, 等. 半煤岩软底巷道底鼓控制技术[J]. 采矿与安全工程学报, 2007, 24(3): 340-344. doi: 10.3969/j.issn.1673-3363.2007.03.019

    Sun Yuning, Zhou Hongchao, Zhou Jianrong, et al. Control technique of floor heave in semi coal and rock roadway with weak floor[J]. Journal of Mining & Safety Engineering, 2007, 24(3): 340-344. doi: 10.3969/j.issn.1673-3363.2007.03.019
    [2] Jiang Y D, An L Q, Liu Y H, et al. Deformation analysis of laser spectra based on S-R decomposition theorem[J]. Applied Mathematics and Mechanics, 1999, 20(11): 1190-1199. doi: 10.1007/BF02463786
    [3] 张小波, 赵光明, 孟祥瑞, 等. 考虑非线性脆性损伤和中间主应力影响的圆形巷道围岩分析[J]. 煤炭学报, 2014, 39(S2): 339-346. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB2014S2008.htm

    Zhang Xiaobo, Zhao Guangming, Meng Xiangrui, et al. Analysis on surrounding rock of circular roadway considering nonlinear brittle damage and intermediate principal stress[J]. Journal of China Coal Society, 2014, 39(S2): 339-346. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB2014S2008.htm
    [4] 张科学, 姜耀东, 张正斌, 等. 大煤柱内沿空掘巷窄煤柱合理宽度的确定[J]. 采矿与安全工程学报, 2014, 31(2): 255-262, 269. https://www.cnki.com.cn/Article/CJFDTOTAL-KSYL201402016.htm

    Zhang Kexue, Jiang Yaodong, Zhang Zhengbin, et al. Determining the reasonable width of narrow pillar of roadway in gob entry driving in the large pillar[J]. Journal of Mining & Safety Engineering, 2014, 31(2): 255-262, 269. https://www.cnki.com.cn/Article/CJFDTOTAL-KSYL201402016.htm
    [5] 马振乾, 姜耀东, 杨英明, 等. 芦岭矿近距离煤层重复开采下底板巷道稳定性研究[J]. 岩石力学与工程学报, 2015, 34(S1): 3320-3327. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2015S1089.htm

    Ma Zhenqian, Jiang Yaodong, Yang Yingming, et al. Floor roadway stability in repeated mining of close distance coal seams in Luling coal mine[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(S1): 3320-3327. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2015S1089.htm
    [6] 姜耀东, 宋红华, 马振乾, 等. 基于地应力反演的构造应力区沿空巷道窄煤柱宽度优化研究[J]. 煤炭学报, 2018, 43(2): 319-326. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201802003.htm

    Jiang Yaodong, Song Honghua, Ma Zhenqian, et al. Optimization research on the width of narrow coal pillar along goaf tunnel in tectonic stress zone[J]. Journal of China Coal Society, 2018, 43(2): 319-326. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201802003.htm
    [7] 姜耀东, 赵毅鑫, 刘文岗, 等. 深部开采中巷道底鼓问题的研究[J]. 岩石力学与工程学报, 2004, 23(14): 2396-2401. doi: 10.3321/j.issn:1000-6915.2004.14.018

    Jiang Yaodong, Zhao Yixin, Liu Wengang, et al. Research on floor heave of roadway in deep mining[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23(14): 2396-2401. doi: 10.3321/j.issn:1000-6915.2004.14.018
    [8] 侯朝炯. 深部巷道围岩控制的关键技术研究[J]. 中国矿业大学学报, 2017, 46(5): 970-978. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGKD201705003.htm

    Hou Chaojiong. Key technologies for surrounding rock control in deep roadway[J]. Journal of China University of Mining & Technology, 2017, 46(5): 970-978. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGKD201705003.htm
    [9] 何满潮. 深部软岩工程的研究进展与挑战[J]. 煤炭学报, 2014, 39(8): 1409-1417. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201408006.htm

    He Manchao. Progress and challenges of soft rock engineering in depth[J]. Journal of China Coal Society, 2014, 39(8): 1409-1417. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201408006.htm
    [10] 康红普, 王金华, 林健. 煤矿巷道锚杆支护应用实例分析[J]. 岩石力学与工程学报, 2010, 29(4): 649-664. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201004004.htm

    Kang Hongpu, Wang Jinhua, Lin Jian. Case studies of rock bolting in coal mine roadways[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(4): 649-664. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201004004.htm
    [11] 高延法, 王波, 王军, 等. 深井软岩巷道钢管混凝土支护结构性能试验及应用[J]. 岩石力学与工程学报, 2010, 29(S1): 2604-2609. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2010S1006.htm

    Gao Yanfa, Wang Bo, Wang Jun, et al. Test on structural property and application of concrete-filled steel tube support of deep mine and soft rock roadway[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(S1): 2604-2609. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2010S1006.htm
    [12] 康红普. 我国煤矿巷道锚杆支护技术发展60年及展望[J]. 中国矿业大学学报, 2016, 45(6): 1071-1081. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGKD201606001.htm

    Kang Hongpu. Sixty years development and prospects of rock bolting technology for underground coal mine roadways in China[J]. Journal of China University of Mining & Technology, 2016, 45(6): 1071-1081. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGKD201606001.htm
    [13] 杨军, 石海洋, 齐干. 巷道底角锚杆控制底鼓机理及选型试验[J]. 采矿与安全工程学报, 2016, 33(4): 643-648. https://www.cnki.com.cn/Article/CJFDTOTAL-KSYL201604012.htm

    Yang Jun, Shi Haiyang, Qi Gan. Research on mechanism for floor heave control in the roadway by base-angel-bolt and its type selection test[J]. Journal of Mining & Safety Engineering, 2016, 33(4): 643-648. https://www.cnki.com.cn/Article/CJFDTOTAL-KSYL201604012.htm
    [14] 马振乾, 姜耀东, 左宇军, 等. 特厚泥质顶板巷道锚杆支护关键参数识别与应用[J]. 中国安全科学学报, 2017, 27(7): 121-126. https://www.cnki.com.cn/Article/CJFDTOTAL-ZAQK201707022.htm

    Ma Zhenqian, Jiang Yaodong, Zuo Yujun, et al. Identification and application of key parameters of bolt support for roadways with extra-thick mudstone roof[J]. China Safety Science Journal, 2017, 27(7): 121-126. https://www.cnki.com.cn/Article/CJFDTOTAL-ZAQK201707022.htm
    [15] 刘少伟, 张伟光, 冯友良. 深井煤巷滑移型底鼓岩体运移机理及控制对策[J]. 采矿与安全工程学报, 2013, 30(5): 706-711. https://www.cnki.com.cn/Article/CJFDTOTAL-KSYL201305012.htm

    Liu Shaowei, Zhang Weiguang, Feng Youliang. Study on migration mechanism of slipping floor heave rock mass in deep roadway and its control countermeasure[J]. Journal of Mining & Safety Engineering, 2013, 30(5): 706-711. https://www.cnki.com.cn/Article/CJFDTOTAL-KSYL201305012.htm
    [16] 侯公羽, 牛晓松. 基于Levy-Mises本构关系及D-P屈服准则的轴对称圆巷理想弹塑性解[J]. 岩土力学, 2009, 30(6): 1555-1562. doi: 10.3969/j.issn.1000-7598.2009.06.004

    Hou Gongyu, Niu Xiaosong. Perfect elastoplastic solution of axisymmetric circular openings in rock mass based on Levy-Mises constitutive relation and D-P yield criterion[J]. Rock and Soil Mechanics, 2009, 30(6): 1555-1562. doi: 10.3969/j.issn.1000-7598.2009.06.004
    [17] 侯公羽, 牛晓松. 基于Levy-Mises本构关系及Hoek-Brown屈服准则的轴对称圆巷理想弹塑性解[J]. 岩石力学与工程学报, 2010, 29(4): 765-777. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201004016.htm

    Hou Gongyu, Niu Xiaosong. Perfect elastoplastic solution of axisymmetric cylindrical cavity based on levy-mises constitutive relation and hoek-brown failure criterion[J]. Chinese Journal of Rock Mechanics and Engineering, 2010, 29(4): 765-777. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201004016.htm
    [18] 黄义, 何芳社. 弹性地基上的梁、板、壳[M]. 北京: 科学出版社, 2005.
    [19] 郑传超. 道路结构力学计算[M]. 北京: 人民交通出版社, 2003
    [20] 刘少伟, 张伟光, 冯友良. 深井煤巷滑移型底鼓岩体运移机理及控制对策[J]. 采矿与安全工程学报, 2013, 30(5): 706-711. https://www.cnki.com.cn/Article/CJFDTOTAL-KSYL201305012.htm

    Liu Shaowei, Zhang Weiguang, Feng Youliang. Study on migration mechanism of slipping floor heave rock mass in deep roadway and its control countermeasure[J]. Journal of Mining & Safety Engineering, 2013, 30(5): 706-711. https://www.cnki.com.cn/Article/CJFDTOTAL-KSYL201305012.htm
    [21] 杨晓杰, 王嘉敏, 张民, 等. 大强煤矿深部巷道围岩吸水软化规律试验研究[J]. 矿业科学学报, 2017, 2(5): 432-438. http://kykxxb.cumtb.edu.cn/article/id/93

    Yang Xiaojie, Wang Jiamin, Zhang Min, et al. Study on strength softening of surrounding rock in deep roadway at Daqiang coal mine[J]. Journal of Mining Science and Technology, 2017, 2(5): 432-438. http://kykxxb.cumtb.edu.cn/article/id/93
    [22] 杨军, 高玉兵, 刘世奇, 等. 动压扰动采准巷道围岩失稳机理及控制研究[J]. 矿业科学学报, 2018, 3(5): 451-460. http://kykxxb.cumtb.edu.cn/article/id/171

    Yang Jun, Gao Yubing, Liu Shiqi, et al. Study on failure mechanism and control techniques of the preparation roadway induced by dynamic mining disturbance[J]. Journal of Mining Science and Technology, 2018, 3(5): 451-460. http://kykxxb.cumtb.edu.cn/article/id/171
    [23] 赵勇强, 何富连, 谢福星, 等. 沿空留巷围岩稳定等级综合评判及返修控制技术研究[J]. 矿业科学学报, 2017, 2(6): 550-558. http://kykxxb.cumtb.edu.cn/article/id/107

    Zhao Yongqiang, He Fulian, Xie Fuxing, et al. Study on comprehensive evaluation of surrounding rock stability grade and repair control technology of gob-side entry retaining[J]. Journal of Mining Science and Technology, 2017, 2(6): 550-558. http://kykxxb.cumtb.edu.cn/article/id/107
    [24] 王润富. 一种保角映射法及其微机实现[J]. 河海大学学报, 1991, 19(1): 86-89. doi: 10.3321/j.issn:1000-1980.1991.01.014

    Wang Runfu. A conformal mapping method and its computer implementation[J]. Journal of Hohai University, 1991, 19(1): 86-89. doi: 10.3321/j.issn:1000-1980.1991.01.014
    [25] 皇甫鹏鹏, 伍法权, 郭松峰, 等. 基于边界点搜索的洞室外域映射函数求解法[J]. 岩土力学, 2011, 32(5): 1418-1424. doi: 10.3969/j.issn.1000-7598.2011.05.022

    Huangfu Pengpeng, Wu Faquan, Guo Songfeng, et al. A new method for calculating mapping function of external area of cavern with arbitrary shape based on searching points on boundary[J]. Rock and Soil Mechanics, 2011, 32(5): 1418-1424. doi: 10.3969/j.issn.1000-7598.2011.05.022
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  • 收稿日期:  2021-05-18
  • 修回日期:  2021-06-11
  • 刊出日期:  2021-10-01

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