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| RESEARCH ON COMPLEMENTARY SUPPORTING SYSTEM OF CONSTANT RESISTANCE WITH LOAD RELEASE FOR THREE-SOFT MINING ROADWAYS IN EXTREMELY THICK COAL SEAM |
| ZHANG Guofeng1，2，YU Shibo1，2，LI Guofeng1，2，HUO Junying1，2 |
(1. School of Mechanics and Civil Engineering，China University of Mining and Technology，Beijing 100083，China；2. State Key Laboratory for Geomechanics and Deep Underground Engineering，China University of Mining and Technology，Beijing 100083，
China) |
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Abstract The surrounding rock of roadway in Tertiary thick coal seam in Qingshui coal mine of Shenyang is soft with high ground pressure. The tunnel had large deformation with 4 times reinforcement and much damaged support after excavation. The mechanisms of rock plastic flow，asymmetry deformation and failure and inharmonic deformation between support and rock are analyzed. The initial support with constant resistance and large deformation bolt can protect the support capacity of the anchorage zone. After the release of deformation energy by the extensional deformation of the constant resistance and large deformation bolt，the concentration stress is transferred to deep to utilize the strength of deep surrounding rock；then the stable loading plastic zone is formed. According to the characteristic of the mining roadway，the reinforced support is complementary with the strengthened roof，released stress sidewalls and supported side corner. The stability is dependent on the common load by support and surrounding rock. The new design containing anchor cable，constant resistance and large deformation bolt，steel band，injected pile is applied to successfully controlling the roadway at #205 working face in second mining area in southern mine. The theory is applied to controlling the stability of this kind of coal entry. The roof subsidence，sidewall shrinkage and floor heave reduced by 75%，60%，42%，respectively. The practice shows that the proposed method can control the deformation of the roadway with soft rock.
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Received: 24 February 2011
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| [1] 何满潮，钱七虎. 深部岩体力学基础研究综述[C]// 第九届全国岩石力学与工程学术大会论文集. 北京：科学出版社，2006：49–62.(HE Manchao，QIAN Qihu. Summary of basic research on rock mechanics at great depth[C]// Proceedings of the 9th Rock Mechanics and Engineering Conference. Beijing：Science Press，2006：49–62.(in Chinese))
[2] 何满潮，孙晓明，景海河. 软岩工程力学[M]. 北京：科学出版社，2002：21–24.(HE Manchao，SUN Xiaoming，JING Haihe. Soft rock engineering mechanics[M]. Beijing：Science Press，2002：21–24.(in Chinese))
[3] 黄祖强. 金川二矿区深部巷道围岩变形特征与支护技术[J]. 中国矿山工程，2005，34(4)：4–8.(HUANG Zuqiang. Deformation characters and support technique of deep roadway surrounding rock in Jinchuan No.2 mining area[J]. China Mining Engineering，2005，34(4)：4–8.(in Chinese))
[4] 康红普，林 健，吴拥政. 全断面高预应力强力锚索支护技术及其在动压巷道中的应用[J]. 煤炭学报，2009，34(9)：1 153–1 159. (KANG Hongpu，LIN Jian，WU Yongzheng. High pretensioned stress and intensive cable bolting technology set in full section and application in entry affected by dynamic pressure[J]. Journal of China Coal Society，2009，34(9)：1 153–1 159.(in Chinese))
[5] 何满潮，郭志彪，任爱武. 柳海矿运输大巷返修工程深部软岩支护设计研究[J]. 岩土工程学报，2005，27(9)：977–980.(HE Manchao，Guo Zhibiao，REN Aiwu. Deep soft rock supporting technology of the repair project for transport tunnel in Liuhai coal mine[J]. Chinese Journal of Geotechnical Engineering，2005，27(9)：977–980.(in Chinese))
[6] 柏建彪，王襄禹，贾明魁. 深部软岩巷道支护原理及应用[J]. 岩土工程学报，2008，30(5)：632–635.(BAI Jianbiao，WANG Xiangyu，JIA Mingkui. Theory and application of supporting in deep soft roadway[J]. Chinese Journal of Geotechnical Engineering，2008，30(5)：632–635.(in Chinese))
[7] 王连国，李明远，王学知. 深部高应力软岩巷道锚注支护技术研究[J]. 岩石力学与工程学报，2005，24(16)：2 889–2 893.(WANG Lianguo，LI Mingyuan，WANG Xuezhi. Study of mechanisms and technology for bolting and grouting in special soft rock roadway under high stress[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(16)：2 889–2 893.(in Chinese))
[8] 方新秋，何 杰，何加省. 深部高应力软岩动压巷道加固技术研究[J]. 岩土力学，2009，30(6)：1 693–1 698.(FANG Xinqiu，HE Jie，HE Jiasheng. Research on reinforced technology for deep soft rock and dynamic pressurized roadway under high stress[J]. Rock and Soil Mechanics，2009，30(6)：1 693–1 698.(in Chinese))
[9] 高延法，王 波，王 军. 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(增1)：2 604–2 609. (GAO Yanfa，WANG Bo，WANG Jun. 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(Supp.1)：2 604–2 609.(in Chinese))
[10] 赵庆彪，侯朝炯，马念杰. 煤巷锚杆–锚索支护互补原理及其设计方法[J]. 中国矿业大学学报，2005，34(4)：490–493.(ZHAO Qingbiao，HOU Chaojiong，MA Nianjie. Supplementary principle and design method of bolt and cable anchor supporting technique[J]. Journal of China University of Mining and Technology，2005，34(4)：490–493.(in Chinese))
[11] 张国锋. 三级系统控制底臌技术原理及其工程应用[硕士学位论文][D]. 北京：中国矿业大学北京，2007.(ZHANG Guofeng. Research on stability of floor heave triplex control and its application[M. S. Thesis][D]. Beijing：China University of Mining and Technology，2007.(in Chinese))
[12] 汤 雷，王五平. 锚杆支护与围岩共同承载的协调性[J]. 煤炭学报，2004，2(1)：12–16.(TANG Lei，WANG Wuping. Coordination between bolting support and surrounding rock affected by ground pressure[J]. Journal of China Coal Society，2004，2(1)：12–16.(in Chinese))
[13] 张 农，侯朝炯，王培荣. 深井三软煤巷锚杆支护技术研究[J]. 岩石力学与工程学报，1999，18(4)：437–440.(ZHANG Nong，HOU Chaojiong，WANG Peirong. On bolting support of roadway in deep mine?s soft coal seam[J]. Chinese Journal of Rock Mechanics and Engineering，1999，18(4)：437–440.(in Chinese))
[14] 连传杰，徐卫亚，王志华. 一种新型让压管锚杆的变形特性及其支护作用机制分析[J]. 防灾减灾工程学报，2008，28(2)：242–247. (LIAN Chuanjie，XU Weiya，WANG Zhihua. Analysis of deforamtion characteristic and supporting mechanism of a new-typed yielding anchor bolt[J]. Journal of Disaster Prevention and Mitigation Engineering，2008，28(2)：242–247.(in Chinese))
[15] 侯朝炯，何亚男. 可伸长锚杆原理及应用[J]. 东北煤炭技术，1995，5(1)：21–25.(HOU Chaojiong，HE Ya?nan. Principle and application of extensive anchor bolt[J]. Coal Technology of Northeast China，1995，5(1)：21–25.(in Chinese))
[16] 胡传亭，郭爱民，乔理学. 虎溪矿井深部回采巷道变形让压锚杆的应用[J]. 煤炭科学技术，2009，37(8)：18–23.(HU Chuanting，GUO Aimin，QIAO Lixue. Application of deformation and yield bolt to deep mining gateway of Huxi Mine[J]. Coal Science and Technology，2009，37(8)：18–23.(in Chinese)) |
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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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2011, Vol. 30 
