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| Stress path effect and instability process analysis of overlying#br#
strata in deep stopes#br# |
| PANG Yihui1，2，WANG Guofa1，2，LI Bingbing3#br# |
(1. Coal Mining and Designing Department，Tiandi Science and Technology Co.，Ltd.，Beijing 100013，China；
2. Coal Mining Branch，China Coal Research Institute，Beijing 100013，China；3. Kouzidong Coal Mine，China Coal
Xinji Energy，Huainan，Anhui 232000，China)
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Abstract In order to reveal the three-direction mining stress variation law and the relationship between the mining stress variation and the overlying strata instability，a method for calculating the disturbance coefficient of three-direction mining stresses was proposed，and the temporal and spatial evolution characteristics of mining stresses and the process of fracture instability of overlying strata in deep stopes were studied. The transformation forms of the principal stress under different loading and unloading conditions were analyzed based on the Mohr-Coulomb strength criterion. The ratio of the maximum and minimum principal stress difference to the distance from the center of the molar stress circle to the intensity curve was proposed as the criterion for determining the intensity disturbance of three-direction mining stresses，and the disturbance coefficient of three-directions mining stresses was deduced. Based on the elastic-plastic mechanics theory，the change rules of the magnitude and direction of the three-direction mining stresses in the overlying strata along the working face advance and the working face length directions in the deep stope were analyzed using 3DEC simulation. The mining stress disturbance coefficient and disturbance intensity partition of the overlying strata in front of the working face were obtained，and the spatial-temporal evolution characteristics of mining stresses in overlying strata were revealed in deep stopes. Based on the relationship of the mining stress and the displacement of overlying strata in the process of breaking，the breaking process of roof strata were subdivided to five stages of mining stress increase，bedding separation，fracture instability，fracture instability of upper roof strata and compaction stability of overlying strata. The variation rule and action mechanism of mining vertical and horizontal stresses in the process of overlying strata breaking were revealed. The research results were applied in the mining practice with 1 000 m buried depth of coal seam，and the phenomena of frequent occurrence of mine pressure and low compressive strength were better explained.
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[1] 王路军，周宏伟，荣腾龙，等. 深部煤体采动应力场演化规律及扰动特征研究[J]. 岩石力学与工程学报，2019，38(增1)：2 944–2 954.(WANG Lujun，ZHOU Hongwei，RONG Tenglong，et al. Stress field evolution law and disturbance characteristic of coal at depth under mining[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(Supp.1)：2 944–2 954.(in Chinese))
[2] 张建民，李全生，张 勇，等. 煤炭深部开采界定及采动响应分析[J]. 煤炭学报，2019，44(5)：1 314–1 325.(ZHANG Jianmin，LI Quansheng，ZHANG Yong，et al. Definition of deep coal mining and response analysis[J]. Journal of China Coal Society，2019，44(5)：1 314–1 325. (in Chinese))
[3] 谢和平，高 峰，鞠 杨. 深部岩体力学研究与探索[J]. 岩石力学与工程学报，2015，34(11)：2 161–2 178.(XIE Heping，GAO Feng，JU Yang. Research and development of rock mechanics in deep ground engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(11)：2 161–2 178.(in Chinese))
[4] 谢和平，彭苏萍，何满潮. 深部开采基础理论与工程实践[M]. 北京：科学出版社，2005：3–9.(XIE Heping，PENG Suping，HE Manchao. Basic theory and engineering practice of deep mining[M]. Beijing：Science Press，2005：3–9.(in Chinese))
[5] 谢和平，张泽天，高 峰，等. 不同开采方式下煤岩应力场–裂隙场–渗流场行为研究[J]. 煤炭学报，2016，41(10)：2 405–2 417.(XIE Heping，ZHANG Zetian，GAO Feng，et al. Stress-fracture-seepage field behavior of coal under different mining layouts[J]. Journal of China Coal Society，2016，41(10)：2 405–2 417.(in Chinese))
[6] 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)：2 803–2 813.(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)：2 803–2 813.(in Chinese))
[7] 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)：1 409–1 417.(HE Manchao. Progress and challenges of soft rock engineering in depth[J]. Journal of China Coal Society，2014，39(8)：1 409–1 417.(in Chinese))
[8] 何满潮，钱七虎. 深部岩体力学基础[M]. 北京：科学出版社，2010：16–21. (HE Manchao，QIAN Qihu. Deep rock mass mechanics foundation[M]. Beijing：Science Press，2010：16–21.(in Chinese))
[9] 谢广祥，李家卓，王 磊，等. 采场底板围岩应力壳力学特征及时空演化[J]. 煤炭学报，2018，43(1)：52–61.(XIE Guangxiang，LI Jiazhuo，WANG Lei，et al. Mechanical characteristics and time and space evolvement of stress shell in stope floor stratum[J]. Journal of China Coal Society，2018，43(1)：52–61.(in Chinese))
[10] 王 磊，谢广祥，王金安. 采场围岩应力壳对破坏场的影响规律及应用[J]. 煤炭学报，2015，40(9)：2 009–2 014.(WANG Lei，XIE Guangxiang，WANG Jin¢an. Numerical investigation on the influence of surrounding rock stress shell on fractured field[J]. Journal of China Coal Society，2015，40(9)：2 009–2 014.(in Chinese))
[11] 王新丰，高明中，李隆钦. 深部采场采动应力、覆岩运移以及裂隙场分布的时空耦合规律[J]. 采矿与安全工程学报，2016，33(4)：604–610.(WANG Xinfeng，GAO Mingzhong，LI Longqin. Spatiotemporal coupling law of mining pressure，strata movement and fracture field distribution in deep stope[J]. Journal of Mining and Safety Engineering，2016，33(4)：604–610.(in Chinese))
[12] 张 通，袁 亮，赵毅鑫，等. 薄基岩厚松散层深部采场裂隙带几盒特征及矿压分布的工作面效应[J]. 煤炭学报，2015，40(10)：2 260–2 268.(ZHANG Tong，YUAN Liang，ZHAO Yixin，et al. Distribution law of working face pressure under the fracture zone distribution characteristic of deep mining[J]. Journal of China Coal Society，2015，40(10)：2 260–2 268.(in Chinese))
[13] 李春元，张 勇，张国军，等. 深部开采动力扰动下底板应力演化及裂隙扩展机制[J]. 岩土工程学报，2018，40(11)：2 031–2 040. (LI Chunyuan，ZHANG Yong，ZHANG Guojun，et al. Crack propagation mechanisms and stress evolution of floor under dynamic disturbance in deep coal mining[J]. Chinese Journal of Geotechnical Engineering，2018，40(11)：2 031–2 040.(in Chinese))
[14] 郭依宝，周宏伟，荣腾龙，等. 采动应力路径下深部煤体扰动特征[J]. 煤炭学报，2018，43(11)：3 072–3 079.(GUO Yibao，ZHOU Hongwei，RONG Tenglong，et al. Disturbance characteristics of deep coal mass under the mining stress path[J]. Journal of China Coal Society，2018，43(11)：3 072–3 079.(in Chinese))
[15] 汪 斌. 深部大理岩的加卸载力学特性及多场耦合研究[博士学位论文][D]. 武汉：武汉理工大学，2011.(WANG Bin. Study on load/unload mechanical properties of marble in deep stratum and its multi-field coupling models[Ph. D. Thesis][D]. Wuhan：Wuhan University of Technology，2011.(in Chinese))
[16] 李学丰，黄茂松，孔 亮. 宏细观结合考虑主应力轴旋转的砂土破坏特性[J]. 岩土力学，2013，34(7)：1 923–1 930.(LI Xuefeng，HUANG Maosong，KONG Liang. Failure properties of sand considering rotation of principal stress axis with method of macro-meso incorporation[J]. Rock and Soil Mechanics，2013，34(7)：1 923–1 930. (in Chinese))
[17] GAO Z W，ZHAO J D，YAO Y P. A generalized anisotropic failure criterion for geomaterials[J]. International Journal of Solids and Structures，2010，47(22)：3 166–3 185.
[18] 梁宁慧，刘新荣，包 太. 岩体卸荷渗流特性的试验[J]. 重庆大学学报：自然科学版，2005，28(10)：133–135.(LIANG Ninghui，LIU Xinrong，BAO Tai. Experimental study on the characteristic of seepage with unloading rock mass[J]. Journal of Chongqing University：Natural Science，2005，28(10)：133–135.(in Chinese))
[19] 刘洪永，程远平，赵长春，等. 采动煤体弹脆塑性损伤本构模型及应用[J]. 岩石力学与工程学报，2010，29(2)：358–365.(LIU Hongyong，CHENG Yuanping，ZHAO Changchun，et al. Constitutive model for elastic-brittle-plastic damage of coal rock mass due to mining and its application[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(2)：358–365.(in Chinese))
[20] BARSANESCU P，SANDOVICI A，SERBAN A. Mohr-Coulomb criterion with circular failure envelope，ex-tended to materials with strength-differential effect[J]. Materials and Design，2018，148：49–70.
[21] 田文岭，杨圣奇，方 刚. 煤样三轴循环加卸载力学特性颗粒流模拟[J]. 煤炭学报，2016，41(3)：603–610.(TIAN Wenling，YANG Shengqi，FANG Gang. Particle flow simulation on mechanical behavior of coal specimen under triaxial cyclic loading and unloading[J]. Journal of China Coal Society，2016，41(3)：603–610.(in Chinese))
[22] 杨小彬，韩心星，刘恩来，等. 单轴循环加卸载岩石非均匀变形演化特征[J]. 煤炭学报，2018，43(2)：449–456.(YANG Xiaobin，HAN Xinxing，LIU Enlai，et al. Properties of non-uniform deformation evolution of rock under uniaxial cyclic loading and unloading[J]. Journal of China Coal Society，2018，43(2)：449–456.(in Chinese))
[23] 张国军，张 勇. 基于莫尔–库仑准则的岩石材料加(卸)载分区破坏特征[J]. 煤炭学报，2019，44(4)：1 049–1 058.(ZHANG Guojun，ZHANG Yong. Partition failure characteristics of rock material loading and unloading based on Mohr-Coulomb criterion[J]. Journal of China Coal Society，2019，44(4)：1 049–1 058.(in Chinese))
[24] 晏长根，林 峰，伍法权，等. 岩体扰动深度估算的应力场方法[J]. 长安大学学报：自然科学版，2011，31(4)：68–72.(YAN Changgen，LIN Feng，WU Faquan，et al. Evaluating rock masses excavation disturbed zone with method of stress redistribution[J]. Journal of Chang¢an University：Natural Science，2011，31(4)：68–72.(in Chinese))
[25] 蒋长宝，俞 欢，段敏克，等. 基于加卸载速度影响下的含瓦斯煤力学及渗透特性实验研究[J]. 采矿与安全工程学报，2017，34(6)：1 216–1 222.(JIANG Changbao，YU Huan，DUAN Minke，et al. Experimental study of mechanical and permeability characteristics of coal with methane containing due to different loading-unloading speeds[J]. Journal of Mining and Safety Engineering，2017，34(6)：1 216–1 222.(in Chinese))
[26] 庞义辉，王国法，张金虎，等. 超大采高工作面覆岩断裂结构及稳定性控制技术[J]. 煤炭科学技术，2017，45(11)：45–50.(PANG Yihui，WANG Guofa，ZHANG Jinhu，et al. Overlying strata fracture structure and stability control technology for ultra large mining height working face[J]. Coal Science and Technology，2017，45(11)：45–50.(in Chinese))
[27] 于 斌，夏洪春，孟祥斌. 特厚煤层综放开采顶煤成拱机制及除拱对策[J]. 煤炭学报，2016，41(7)：1 617–1 623.(YU Bin，XIA Hongchun，MENG Xiangbin. Top coal arching mecha-nism and arch removal strategies in fully mechanized top coal caving mining of ultra-thick coal seam[J]. Journal of China Coal Society，2016，41(7)：1 617–1 623.(in Chinese))
[28] 庞义辉. 超大采高液压支架与围岩的强度耦合关系[博士学位论文][D]. 北京：煤炭科学研究总院，2018.(PANG Yihui. Strength Coupling relationship between super high mining hydraulic support and surrounding rock[Ph. D. Thesis][D]. Beijing：China Coal Research Institute，2018.(in Chinese))
[29] 康红普，林 健，张 晓. 深部矿井地应力测量方法研究与应用[J]. 岩石力学与工程学报，2007，26(5)：929–933.(KANG Hongpu，LIN Jian，ZHANG Xiao. Research and application of in-situ stress measurement in deep mines[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(5)：929–933.(in Chinese))
[30] 康红普，伊丙鼎，高富强，等. 中国煤矿井下地应力数据库及地应力分布规律[J]. 煤炭学报，2019，44(1)：23–33.(KANG Hongpu，YI Bingding，GAO Fuqiang，et al. Database and characteristics of underground in-situ stress distribution in Chinese coal mines[J]. Journal of China Coal Society，2019，44(1)：23–33.(in Chinese))
[31] 刘泉声，刘恺德. 淮南矿区深部地应力场特征研究[J]. 岩土力学，2012，33(7)：2 089–2 096.(LIU Quansheng，LIU Kaide. Characteristics of in-situ stress field for deep levels in Huainan coal mine[J]. Rock and Soil Mechanics，2012，33(7)：2 089–2 096.(in Chinese)) |
| [1] |
LI Botao1, 2, 3, TAN Yuxuan1, LIN Haifei4, 5*, WEI Jianping1, 2, 3, ZHANG Hongtu1, 2, 3, LI Shugang4, 5, WEI Zongyong4, 5, WANG Pei4, LUO Rongwei4, LIU Yanwei1, 2, 3. Mechanical properties and mesoscopic damage evolution of coal under liquid-nitrogen freezing at different initial temperatures[J]. , 2026, 45(6): 1757-1772. |
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2020, Vol. 39 
