Slip mechanism of wedge and barrel anchorages under dynamic disturbance
MA Zhenqian1，JIANG Yaodong2，3，YANG Yingming1，ZHANG Kexue1
(1. Faculty of Resources and Safety Engineering，China University of Mining and Technology，Beijing 100083，China； 2. School of Mechanics and Civil Engineering，China University of Mining and Technology，Beijing 100083，China； 3. State Key Laboratory of Coal Resources and Safe Mining，China University of Mining and Technology，Beijing 100083，China)
Abstract：Coal mining could cause rock collapses and surface subsidence，other underground engineering，such as hydropower chambers and subway tunnels，are noncomparable with the intense disturbance induced by coal mining. In order to study the slip mechanism of wedge and barrel anchorages under dynamic disturbance，this paper takes II82 mining area in Luling coal mine as engineering background. II82 pedestrian rise was subjected to severe disturbance of upper working faces，so the slip mechanism of wedge and barrel anchorages was analyzed from the aspect of dynamic disturbance by using finite difference method software FLAC2D. The results show that in early dynamic disturbance the displacement differences of shallow and deep medium in surrounding rock lead to the anchor cable load reduce，and then it was in tension in the process of reinforcement. The dramatic changes in anchor cable load could not make the anchor cable pre-tightening like constant loading，on the contrary，the anchorage was broken by instant slip. The problem of anchorage slip under dynamic disturbance could be effectively solved by combining extrusion anchorage and screw anchorage，and it was successfully applied in Luling coal mine
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)：1153-1159. (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)：1153-1159.(in Chinese))
[2]
康红普，林 健，张冰川. 小孔径预应力锚索加固困难巷道的研究与实践[J]. 岩石力学与工程学报，2003，22(3)：387-390.(KANG Hongpu，LIN Jian，ZHAGN Bingchuan. Study on small borehole pretensioned cable reinforcingcomplicated roadway[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(3)：387-390.(in Chinese))
[3]
周明华. 影响夹片式锚具锚固性能的综合因素[J]. 桥梁建设，2001，(2)：58-60.(ZHOU Minghua. Factors influencing the performance of the anchorage with wedged jaws[J]. Bridge Construction，2001，(2)：58-60.(in Chinese))
[4]
姜耀东，潘一山，姜福兴，等. 我国煤炭开采中的冲击地压机制和防治[J]. 煤炭学报，2014，39(2)：205-213.(JIANG Yaodong，PANYishan，JIANGFuxing，et al. State of the art review on mechanism and prevention of coal bumps in China[J]. Journal of China Coal Society，2014，39(2)：205-213.(in Chinese))
[5]
卢爱红，郁时炼，秦昊，等. 应力波作用下巷道围岩层裂结构的稳定性研究[J]. 中国矿业大学学报，2008，37(6)：669-774.(LU Aihong，YU Shilian，QIN Hao，etal. Stability of layered crack structure in roadway surrounding rock under stress wave[J]. Journal of China University of Mining andTechnology，2008，37(6)：669-774. (in Chinese))
[6]
倪海敏，茅献彪，张春，等. 冲击载荷对巷道稳定性的影响研究[J]. 煤炭工程，2011，(9)：84-86.(NI Haimin，MAO Xianbiao，ZHANG Chun，etal. Study on bumping load affected to mine gateway stability[J].Coal Engineering，2011，(9)：84-86.(in Chinese))
[7]
窦林名，何学秋. 冲击矿压防治理论与技术[M]. 徐州：中国矿业大学出版社，2001：1-5.(DOU Linming，HE Xueqiu. Theory and technology of rockburst prevention[M]. Xuzhou：China University of Mining and Technology Press，2001：1-5.(in Chinese))
[8]
ORTLEPP W D. Rock fracture and rockbursts：an illustrative study [M]. Johannesburg：The South African Institute of Mining and Metallurgy，1997：37-54.
[9]
李夕兵，李地元，郭雷，等. 动力扰动下深部高应力矿柱力学响应研究[J]. 岩石力学与工程学报，2007，26(5)：922-928.(LI Xibin，LI Diyuan，GUO Lei，et al. Study on mechanical response of highly-stressed pillars in deep mining under dynamic disturbance[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(5)：922-928.(in Chinese))
[10]
顾金才，陈安敏，徐景茂，等. 在爆炸荷载条件下锚固洞室破坏形态对比试验研究[J]. 岩石力学与工程学报，2008，27(7)：1315- 1320.(GU Jincai，CHEN Anmin，XU Jingmao，et al. ModelTest study of failure patterns of anchored tunnel subjected to explosion load[J]. Chinese Journal of RockMechanics and Engineering，2008，27(7)：1315-1320.(in Chinese))
[11]
杨苏杭，梁斌，顾金才，等. 锚固洞室抗爆模型试验锚索预应力变化特性研究[J]. 岩石力学与工程学报，2006，25(增2)：3749- 3756.(YANG Suhang，LIANG Bin，GU Jincai，et al. Research on characteristic of prestress change of anchorage cable in anti-explosion model test of anchored cavern[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(Supp.2)：3749-3756.(in Chinese))
[12]
薛亚东，张世平，康天合. 回采巷道锚杆动载响应的数值分析[J]. 岩石力学与工程学报，2003，22(11)：1903-1906.(XUE Yadong，ZHANG Shiping，KANG Tianhe. Numerical analysis of dynamic response of rock bolts inmining roadways[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(11)：1903-1906.(in Chinese))
[13]
王光勇，张素华，谢文强，等. 锚杆动载响应和轴向应力分布规律数值分析[J]. 采矿与安全工程学报，2009，26(1)：114-117.(WANG Guangyong，ZHANG Suhua，XIE Wenqiang，et al. Numerical analysis of dynamic response and axial stress distribution of rock bolts under explore loads[J]. Journal of Mining andSafety Engineering，2009，26(1)：114-117.(in Chinese))
[14]
赵通，左德元，童建刚. 夹片式锚固体系锥角的有限元参数化设计[J]. 西南交通大学学报，2004，39(5)：614-617.(ZHAO Tong，ZUO Deyuan，TONG Jiangang. FEM-based parametrization design of cone angle of anchors[J]. Journal of Southwest Jiao Tong University，2004，39(5)：614-617.(in Chinese))
[15]
李桂臣，马振乾，张农，等. 淮北矿区多次跨采巷道破坏特征及控制对策研究[J]. 采矿与安全工程学报，2013，30(2)：181-187.(LI Guicheng，MA Zhenqian，ZHANG Nong，et al. Research on failure characteristics and control measures of roadways affected by multiple overhead mining in Huaibei mining area[J]. Journal of Mining andSafety Engineering，2013，30(2)：181-187.(in Chinese))
[16]
马振乾. 多次跨采巷道破坏特征及控制对策研究[硕士学位论文][D]. 徐州：中国矿业大学，2013：33-35.(MA Zhenqian. Study on failure characteristics and control measures of roadways affected by multiple overhead mining[M. S. Thesis][D]. Xuzhou：China University of Mining and Technology，2013：33-35.(in Chinese))
[17]
中华人民共和国行业编写组. TB/T3193—2008铁路工程预应力筋用夹片式锚具、夹具和连接器技术条件[S]. 北京：中国铁道出版社，2008：1-10.(The Professional Standards Compilation Group of People¢s Republic of China. TB/T3193—2008Technical conditions of anchorage，grip and couplerfor prestressing tendons in railway construction[S]. Beijing：China Railway Press，2008：1-10.(in Chinese))
2016, Vol. 35 
