含弱夹层组合岩石变形破坏演化特征实验研究

doi:10.13722/j.cnki.jrme.2021.0280

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摘要针对含弱夹层组合岩石试件，利用CCD相机作为观测手段，采用数字散斑相关方法，得到变形场分析结果，研究含弱夹层组合岩石变形破坏演化特征，并对层间作用效应进行理论分析。结果表明：(1) 中间弱强度岩石最先出现水平拉应变局部化带，随着荷载增加，局部化带向岩层接触面发展，并通过层间作用对上下层岩石施加拉应力，使上下层岩石最先出现竖向拉裂缝，大大降低了弱夹层组合岩石的抗压强度；(2) 中间弱强度岩石受上下层岩石影响发生张拉破坏，导致试件最终破坏。上下层岩石出现裂隙后，在该裂隙左侧区域内，上下层岩石对中间弱强度岩石的约束作用减弱甚至产生张拉作用，致使该部分岩石抗压强度突降，发生突然破坏；(3) 理论计算表明，距层间接触面一定范围内，上下2层岩石抗压强度降低，中间层岩石抗压强度上升，其变化幅度与岩石力学参数有关。就本次实验对应的理论计算而言，上下2层的花岗岩抗压强度降低为花岗岩单轴抗压强度的0.32倍，为32.514 MPa，小于中间弱强度岩石的抗压强度，成为弱夹层组合岩石抗压强度的控制因素；(4) 通过实验得到弱夹层组合岩石抗压强度为33.91 MPa，与结论(3)中的理论计算结果相吻合。且实验过程中，上下层花岗岩首先出现裂隙，表明其抗压强度小于中间弱强度岩石，也与结论(3)中的理论分析一致。研究成果对煤柱型冲击地压的发生机理与防治有一定的指导借鉴作用。

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	许海亮
	朱万宇
	宋义敏
	安栋
	孙金斗

关键词 ：岩石力学, 弱夹层组合岩石, 变形演化, 抗压强度, 数字散斑相关方法, 冲击地压

Abstract：The deformation and failure evolution characteristics of combination rock with weak interlayers are studied by using a CCD camera as observation method，and the deformation field under uniaxial compression is analyzed by the digital speckle method. Then the effect of the interlayer interaction is theoretically analyzed. The results indicate that the horizontal tensile strain localization zone first appears in the middle weak interbedded rock，and that，as the load increases，the localized zone develops towards the rock contact surfaces. Under the interlayer action，the upper and lower layers of rocks produce localized zones and appear vertical tensile cracks first，greatly reducing the compressive strength of the weak interlayer composite rock. The middle weak-strength rock is affected by the upper and lower layers of rock and undergoes tensile failure，resulting in the final failure of the specimen. After cracks appear in the upper and lower rocks，in the area to the left of the cracks，the restraining effect of the upper and lower rocks on the weak-strength rocks in the middle is weakened，causing the compressive strength of this part of the rock to drop suddenly and even failure. The theoretical calculation shows that，in a certain range from the interlayer contact surface，the compressive strengths of the upper and lower layers of rocks decrease while the compressive strength of the middle weak layer increases. The variation range of the compressive strength is related to rock mechanics parameters. The theoretical calculation also reveals that the compressive strength of the upper and lower layers of granite is reduced to 32.514 MPa，about 0.32 times of the initial strength and smaller than the compressive strength of the intermediate weak-strength rock，and hence，is the controlling factor of the compressive strength of the weakly interbedded rock. The compressive strength of the rock with weak interlayers obtained through model experiment is 33.91 MPa，which is consistent with the theoretical calculation result. It is observed that，during the experiment，the upper and lower layers of granite first appear cracks，indicating that their compressive strength is lower than that of the middle weak-strength rock，which is also consistent with the theoretical analysis. The results can be used as a reference for the occurrence mechanism and prevention of coal pillar rock burst.

Key words： rock mechanics composite rock with weak interlayer deformation evolution compressive strength digital speckle correlation method impact ground pressure

引用本文:

许海亮，朱万宇，宋义敏，安栋，孙金斗. 含弱夹层组合岩石变形破坏演化特征实验研究[J]. 岩石力学与工程学报, 2021, 40(12): 2402-2410.
XU Hailiang，ZHU Wanyu，SONG Yimin，AN Dong，SUN Jindou. Experimental study on deformation and failure evolution characteristics of combination rock with weak interlayers. , 2021, 40(12): 2402-2410.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2021.0280 或 http://rockmech.whrsm.ac.cn/CN/Y2021/V40/I12/2402

[4]	潘一山，王凯兴. 岩体间超低摩擦发生机理的摆型波理论[J]. 地震地质，2014，36(3)：833-844.(PAN Yishan，WANG Kaixing. Pendulum- Type waves theory on the mechanism of anomalously low friction between rock masses[J]. Seismology and Geology，2014，36(5)：833-844.(in Chinese))
[6]	姜耀东，王涛，宋义敏，等. 煤岩组合结构失稳滑动过程的实验研究[J]. 煤炭学报，2013，38(2)：177-182.(JIANG Yaodong，WANG Tao，SONG Yimin，et al. Experimental study on the stick-slip precess of coal-rock composite samples[J]. Chinese Journal of Rock Mechanics and Engineering，2013，38(2)：177-182.(in Chinese))
[8]	宋义敏，张悦，许海亮，等. 岩石摩擦滑动位移场时空演化特征研究[J]. 岩石力学与工程学报，2018，37(8)：1 777-1 784.(SONG Yimin，ZHANG Yue，XU Hailiang，et al. Temporal and spatial characteristics of displacement field of rock friction and sliding[J]. Chinese Journal of Rock Mechanics and Rngineering，2018，37(8)：1 777-1 784.(in Chinese))
[9]	宋义敏，杨小彬. 煤柱失稳破坏的变形场及能量演化试验研究[J]. 采矿与安全工程学报，2013，30(6)：822-827.(SONG Yimin，YANG Xiaobin. Evolution characteristics of deformation and energy fields during coal pillar instability[J]. Journal of Mining and Safety Engineering，2013，30(6)：822-827.(in Chinese))
[11]	马胜利，刘力强，马瑾，等. 均匀与非均匀断层滑动失稳成核过程的实验研究[J]. 中国科学(D辑)，2003，33(增)：45-52.(MA Shengli，LIU Liqiang，MA Jin，et al. Experimental study on the nucleation process of slip instability in uniform and non-uniform faults[J]. Science in China(Ser. D)，2003，33(Supp.)：45-52.(in Chinese))
[13]	齐庆新，毛德兵，王永秀. 冲击地压的非线性非连续特征[J]. 岩土力学，2003，24(增2)：575-579.(QI Qingxin，MAO Debing，WANG Yongxiu. A study of nonlinearand discontinuous characters of rock burst[J]. Rock and Soil Mechanics，2003，24(Supp.2)：575-579.(in Chinese))
[15]	左建平，谢和平，吴爱民，等. 深部煤岩单体及组合体的破坏机制与力学特性研究[J]. 岩石力学与工程学报，2011，30(1)：84-92. (ZUO Jianping，XIE Heping，WU Aimin，et al. Investigation on failure mechanisms and mechanical behaviors of deep coal-rock single body and combined body[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(1)：84-92.(in Chinese))
[17]	陈绍杰，尹大伟，张保良，等. 顶板-煤柱结构体力学特性及其渐进破坏机制研究[J]. 岩石力学与工程学报，2017，36(7)：1 588-1 598. (CHEN Shaojie，YIN Dawei，ZHANG Baoliang，et al. Mechanical characteristics and progressive failure mechanism of roof-coal pillar structure[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(7)：1 588-1 598.(in Chinese))
[20]	姜福兴，魏全德，王存文，等. 巨厚砾岩与逆冲断层控制型特厚煤层冲击地压机理分析[J]. 煤炭学报，2014，39(7)：1 191-1 196. (JIANG Fuxing，WEI Quande，WANG Cunwen，et al. Analysis of rock burst mechanism in extra-thick coal seam controlled by huge thick conglomerate and thrust fault[J]. Journal of China Coal Society，2014，39(7)：1 191-1 196.(in Chinese))
[7]	宋义敏，马少鹏，杨小彬，等. 断层冲击地压失稳瞬态过程的试验研究[J]. 岩石力学与工程学报，2011，30(4)：812-817.(SONG Yimin，MA Shaopeng，YANG Xiaobin，et al. Experimental investigation on instability transient process of fault rockburst[J]. Chinese Journal of Rock Mechanics and Rngineering，2011，30(4)：812-817.(in Chinese))
[18]	刘杰，王恩元，宋大钊，等. 岩石强度对于组合试样力学行为及声发射特性的影响[J]. 煤炭学报，2014，39(4)：685-691.(LIU Jie，WANG Enyuan，SONG Dazhao，et al. Effects of rock strength on mechanical behavior and acoustic emission characteristics of samples composed of coal and rock[J]. Journal of China Coal Society，2014，39(4)：685-691.(in Chinese))
[5]	李利萍，李卫军，潘一山. 冲击扰动对超低摩擦型冲击地压影响分析[J]. 岩石力学与工程学报，2019，38(1)：111-120.(LI Liping，LI Weijun，PAN Yishan. Influence of impact disturbance on anomalously low friction rock bursts[J]. Chinese Journal of Rock Mechanics and Rngineering，2019，38(1)：111-120.(in Chinese))
[16]	窦林名，田京城，陆菜平，等. 组合煤岩冲击破坏电磁辐射规律研究[J]. 岩石力学与工程学报，2005，24(19)：3 541-3 544.(DOU Linming，TIAN Jingcheng，LU Caiping，et al. Research on electromagnetic radiation rules of composed coal-rock burst failure[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(19)：3 541-3 544.(in Chinese))
[1]	钱七虎. 岩爆、冲击地压的定义、机制、分类及其定量预测模型[J]. 岩土力学，2014，35(1)：1-6.(QIAN Qihu. Definition，mechanism，classification and quantitative forecast model for rockburst and pressure bump[J]. Rock and Soil Mechanics，2014，35(1)：1-6.(in Chinese))
[12]	马胜利，马瑾，刘力强. 地震成核相的实验证据[J]. 科学通报，2002，33(5)：387-391.(MA Shengli，MA Jin，LIU Liqiang，et al. Experimental evidence for seismic nucleation phase[J]. Chinese Science Bulletin，2002，33(5)：387-391.(in Chinese))
[10]	李海涛，刘军，赵善坤，等. 考虑顶底板夹持作用的冲击地压孕灾机制试验研究[J]. 煤炭学报，2018，43(11)：2 951-2 958.(LI Haitao，LIU Jun，ZHAO Shankun，et al. Experimental study on the development mechanism of coal bump considering the clam-ping effect of roof and floor[J]. Journal of China Coal Socety，2018，43(11)：2 951-2 958.(in Chinese))
[21]	赵同彬，郭伟耀，谭云亮，等. 煤厚变异区开采冲击地压发生的力学机制[J]. 煤炭学报，2016，41(7)：1 659-1 666.(ZHAO Tongbin，GUO Weiyao，TAN Yunliang，et al. Mechanics mechanism of rockburst caused by mining in variable region of coal thickness[J]. Journal of China Coal Society，2016，41(7)：1 659-1 666.(in Chinese))
[2]	齐庆新，李一哲，赵善坤，等. 我国煤矿冲击地压发展70年：理论与技术体系的建立与思考[J]. 煤炭科学技术，2019，47(9)：1-40. (QI Qingxin，LI Yizhe，ZHAO Shankun，et al. Seventy years development of coal mine rockburst in China：establishment and consideration of theory and technology system[J]. Coal Science and Technology，2019，47(9)：1-40.(in Chinese))
[3]	CHEN S J，GUO W J，ZHOU H，et al. Field investigation of long-term bearing capacity of strip coal pillars[J]. International Journal of Rock Mechanics and Mining Sciences，2014，70(1)：109-114.
[14]	宋录生，赵善坤，刘军，等. “顶板-煤层”结构体冲击倾向性演化规律及力学特性试验研究[J]. 煤炭学报，2014，39(增 1)：23-30.(SONG Lusheng，ZHAO Shankun，LIU Jun，et al. Experimental research on rules of rock burst tendency evolution and mechanical properties of“roof-coal”structure body[J]. Journal of China Coal Society，2014，39(Supp.1)：23-30.(in Chinese))
[19]	张泽天，刘建锋，王璐，等. 组合方式对煤岩组合体力学特性和破坏特征影响的试验研究[J]. 煤炭学报，2012，37(10)：1 677-1 681. (ZHANG Zetian，LIU Jianfeng，WANG Lu，et al. Effects of combination mode on mechanical properties and failure characteristics of the coal-rock combinations[J]. Journal of China Coal Society，2012，37(10)：1 677-1 681.(in Chinese))