岩板断裂铰接成拱过程及其失稳特征试验研究

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摘要利用MTS岩石力学试验机和自主研发的加载装置，进行集中荷载作用下，岩板断裂铰接成拱过程及其失稳特征的试验研究，得到竖向荷载¬¬–位移–水平反力关系曲线。试验结果表明：随着竖向荷载的不断增大，岩板梁式断裂后铰接形成拱形结构，并在铰接点产生水平反力。在竖向荷载和水平反力的共同作用下，竖向荷载–位移–水平反力关系曲线存在4个明显的力学响应阶段：加载前应力调整、岩板断裂铰接成拱、岩拱结构承载的峰前硬化和峰后软化4个阶段。基于岩板铰接拱结构工程力学模型，推导出岩拱结构承载力与水平反力关系式，并进行岩拱结构受力随岩板参数变化的敏感性分析。

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关键词 ：岩石力学, 岩板, 铰接拱, 水平反力, 试验研究, 层状顶板

Abstract：The instability characteristics of the fracture hinged arch for rock plates were researched experimentally with the independent researched loading device based on MTS rock mechanics test system under concentrated load condition；and vertical load-displacement-horizontal reaction force curves were obtained through the experiments. The experimental results show that rock plate fractured in beam style and formed hinged arch with the increasing vertical load；at the same time，horizontal reaction forces generated at these hinge points. There are four distinct mechanical response stages in the vertical load-displacement-horizontal reaction force curves，which are initial adjustment before loading，rock plate fracture and forming hinged arch，pre-peak hardening and post-peak softening of rock arch load bearing. Based on the engineering mechanical model of hinged arch structure of rock plate，the relationship formula for bearing capacity and horizontal reaction force of rock arch structure is deduced；and the sensitivity analysis of load bearing of rock arch structure changing with rock plate parameters is conducted.

Key words： rock mechanics rock plate hinged arch horizontal reaction force experimental research stratified roof

收稿日期: 2012-03-14

引用本文:

王树仁1，HAGAN P2，程岩2，王虎1. 岩板断裂铰接成拱过程及其失稳特征试验研究[J]. 岩石力学与工程学报, 2012, 31(8): 1674-1679.
WANG Shuren1，HAGAN P2，CHENG Yan2，WANG Hu1. EXPERIMENTAL RESEARCH ON FRACTURE HINGED ARCHING PROCESS AND INSTABILITY CHARACTERISTICS FOR ROCK PLATES. , 2012, 31(8): 1674-1679.

链接本文:

http://www.rockmech.org/CN/Y2012/V31/I8/1674

[2]	张向阳. 采空区顶板蠕变损伤断裂分析[J]. 辽宁工程技术大学学报：自然科学版，2009，28(5)：777-780.(ZHANG Xiangyang. Analysis of creep damage fracture at upper roof in the mined-out regions[J]. Journal of Liaoning Technical University：Natural Science，2009，28(5)：777-780.(in Chinese)) " target="_blank">
[5]	NOMIKOS P P，SOFIANOS A I，TSOUTRELIS C E. Structural response of vertically multi-jointed roof rock beams[J]. International Journal of Rock Mechanics and Mining Sciences，2002，39(1)：79-94.
[6]	TALESNICK M L，YA?ACOV N B，CRUITORO A. Modeling of a multiply jointed voussoir beam in the centrifuge[J]. Rock Mechanics and Rock Engineering，2006，40(4)：383-404. " target="_blank">
[12]	王树仁，贾会会，武崇福. 动荷载作用下采空区顶板安全厚度确定方法及其工程应用[J]. 煤炭学报，2010，35(8)：1 263-1 268. (WANG Shuren，JIA Huihui，WU Chongfu. Determination method of roof safety thickness in the mined-out regions under dynamic loading and its engineering application[J]. Journal of China Coal Society， 2010，35(8)：1 263-1 268.(in Chinese)) " target="_blank">
[3]	侯公羽，陶龙光，李先炜，等. 层状断裂顶板锚拉支架系统的分叉研究[J]. 岩石力学与工程学报，2000，19(1)：77-81.(HOU Gongyu，TAO Longguang，LI Xianwei，et al. Study on the bifurcation behaviour of truss support system under stratified and fractured roof[J]. Chinese Journal of Rock Mechanics and Engineering，2000，19(1)：77-81. (in Chinese))
[13]	王树仁，HAGAN P，张呈国. 矩形岩板弯曲试验监测侧压力变化的加载装置：中国：201120284671.7[P]. 2012-07-11.(WANG Shuren，HAGAN P，ZHANG Chengguo. Device for monitoring lateral pressure changes in rock-like material rectangular rock plate bending test：China：201120284671.7[P]. 2012-07-11.(in Chinese)) " target="_blank">
[1]	潘岳，耿厚才. 折断式顶板大面积冒落的尖点突变模型[J]. 有色金属，1989，41(4)：19-26.(PAN Yue，GENG Houcai. A cuspidal point-abrupt change model for large area caving of “sanpped” roof[J]. Nonferrous Metals，1989，41(4)：19-26.(in Chinese)) " target="_blank">
[8]	王金安，李大钟，尚新春. 采空区坚硬顶板流变破断力学分析[J]. 北京科技大学学报，2011，33(2)：142-147.(WANG Jin?an，LI Dazhong，SHANG Xinchun. Mechanical analysis of rheological fracture of strong roof strata above mined-out area[J]. Journal of University of Science and Technology Beijing，2011，33(2)：142-147.(in Chinese)) " target="_blank">
[10]	DIEDERICHS M S，KAISER P K. Tensile strength and abutment relaxation as failure control mechanisms in underground excavations[J]. International Journal of Rock Mechanics and Mining Sciences，1999，36(1)：69-96. " target="_blank">
[11]	WANG S R，JIA H H. Analysis of creep characteristics of shallow mined-out areas roof under low stress conditions[J]. Applied Mechanics and Materials，2012，(105/106/107)：832-836. " target="_blank">
[4]	杨建辉，王伟堂，夏建中. 煤巷层状顶板锚杆组合铰接拱支护机制数值模拟研究[J]. 煤炭科学技术，2004，32(6)：65¬-68.(YANG Jianhui，WANG Weitang，XIA Jianzhong. Simulation research on support mechanism of bolt combined jointed arch in bedded roof of seam gateway[J]. Coal Science and Technology，2004，32(6)：65-68.(in Chinese)) " target="_blank">
[7]	贺广零，黎都春，翟志文，等. 采空区煤柱-顶板系统失稳的力学分析[J]. 煤炭学报，2007，32(9)：897-901.(HE Guangling，LI Duchun，ZHAI Zhiwen，et al. Mechanical analysis of instability of coal pillar and stiff roof system[J]. Journal of China Coal Society，2007，32(9)：897-901.(in Chinese))
[9]	CRAVERO M，IABICHINO G. Analysis of the flexural failure of an overhanging rock slab[J]. International Journal of Rock Mechanics and Mining Sciences，2004，41(3)：605-610. " target="_blank">
[14]	BAKUN-MAZOR D，HATZOR Y H，DERSHOWITZ W S. Modeling mechanical layering effects on stability of underground openings in jointed sedimentary rocks[J]. International Journal of Rock Mechanics and Mining Sciences，2009，46(2)：262-271.