I型静态断裂韧度与破碎后新增表面积关系试验研究

doi:10.13722/j.cnki.jrme.2020.1155

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摘要为研究煤岩I型静态断裂韧度与研磨破碎后新增表面积的关系，采用中心直裂纹半圆盘试样(NSCB)和1～2 mm/0.425～1 mm粒径试样进行三点弯曲试验和研磨破碎试验，运用断裂力学及岩石破碎学，从理论分析和室内试验两个方面研究二者之间的关系。理论分析表明：断裂韧度的二次方与研磨破碎后新增表面积的倒数成正比；再以试验数据为依据进行拟合，结果表明：1～2 mm/0.425～1 mm粒径试样研磨破碎后，断裂韧度的二次方与新增表面积的倒数均呈很好的正比关系，其相关系数R2分别为0.974和0.878，说明可以用易于计算的破碎后新增表面积来估算煤的断裂韧度，进而获其表面能，这不仅为煤的断裂韧度测定提供一种新的试验方法，也为更深一步理解突出过程中的能量耗散提供试验依据。

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	蔡增辉1
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	成墙1
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	耿伟乐1
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关键词 ：岩石力学, 煤岩断裂韧度, 新增表面积, 中心直裂纹半圆盘试样(NSCB), 1～2 mm/0.425～1 mm粒径试样

Abstract：Three-point bending tests and grinding tests were carried out with notched semi-circular bend(NSCB) and 1–2 mm/0.425–1 mm particle size samples，and theoretical analysis was performed based on fracture mechanics and rock fragmentation. The theoretical analysis shows that the second power of the fracture toughness is directly proportional to the reciprocal of the newly added surface area after crushing. The fitting results on the test data also indicate that there is a good proportion between the second power of the fracture toughness and the reciprocal of the newly added surface area of the 1–2 mm/0.425–1 mm particle size samples after grinding，and the correlation coefficient R2 are 0.974 and 0.878 respectively，which shows that the fracture toughness of coal can be estimated by the newly added surface area calculated easily and then the surface energy can be obtained. The research not only provides a new test method for the determination of the fracture toughness of coal but also provides an experimental basis for further understanding of the energy dissipation in the process of outburst.

Key words： rock mechanics fracture toughness of coal and rock newly added surface area notched semi-circular bend(NSCB) 1&ndash 2 mm/0.425&ndash 1 mm particle size samples

引用本文:

蔡增辉1，2，黄滚1，2，郑杰1，2，成墙1，2，耿伟乐1，2. I型静态断裂韧度与破碎后新增表面积关系试验研究[J]. 岩石力学与工程学报, 2021, 40(8): 1570-1579.
CAI Zenghui1，2，HUANG Gun1，2，ZHENG Jie1，2，CHENG Qiang1，2，GENG Weile1，2. Experimental study on the relationship between mode I static fracture toughness and newly added surface area after crushing. , 2021, 40(8): 1570-1579.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2020.1155 或 https://rockmech.whrsm.ac.cn/CN/Y2021/V40/I8/1570

[1]	黄维新，刘敦文，夏明. 煤与瓦斯突出过程的细观机制研究[J]. 岩石力学与工程学报，2017，36(2)：429-436.(HUANG Weixin，LIU Dunwen，XIA Ming. Study of meso-mechanism of coal and gas outburst[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(2)：429-436.(in Chinese))
[2]	王凯，王亮，杜锋，等. 煤粉粒径对突出瓦斯-煤粉动力特征的影响[J]. 煤炭学报，2019，44(5)：1 369-1 377.(WANG Kai，WANG Liang，DU Feng，et al. Influence of coal powder particle sizes on dynamic characteristics of coal and gas outburst[J]. Journal of China Coal Society，2019，44(5)：1 369-1 377.(in Chinese))
[3]	唐巨鹏，郝娜，潘一山，等. 基于声发射能量分析的煤与瓦斯突出前兆特征试验研究[J]. 岩石力学与工程学报，2021，40(1)：31-42.(TANG Jupeng，HAO Na，PAN Yishan，et al. Experimental study on precursor characteristics of coal and gas outburst based on acoustic emission energy analysis[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(1)：31-42.(in Chinese))
[4]	袁亮. 煤矿典型动力灾害风险判识及监控预警技术研究进展[J]. 煤炭学报，2020，45(5)：1 557-1 566.(YUAN Liang. Research progress on risk identification，assessment，monitoring and warning technologies of typical dynamic hazards in coal mines[J]. Journal of China Coal Society，2020，45(5)：1 557-1 566.(in Chinese))
[5]	罗甲渊，黄滚，熊阳涛，等. 破碎后微小煤颗粒分布与破碎功关系实验研究[J]. 煤炭学报，2016，41(12)：3 054-3 061.(LUO Jiayuan，HUANG gun，XIONG Yangtao，et al. Experimental study on the relationship between the distribution of micro coal particles and the crushing energy[J]. Journal of China Coal Society，2016，41(12)：3 054-3 061.(in Chinese))
[6]	李瑞泽，卢文波，尹岳降，等. 白鹤滩旱谷地灰岩爆破碎石颗粒形状及比表面积特征研究[J]. 岩石力学与工程学报，2019，38(7)：1 344-1 354.(LI Ruize，LU Wenbo，YIN Yuejiang，et al. Study on the shape and specific surface area characteristics of blasting gravel particles of limestone in Hangudi quarry of Baihetan[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(7)：1 344-1 354.(in Chinese))
[7]	ISRM TESTING COMMISSION C-O O F. Suggested Methods for Determining the Fracture Toughness of Rock[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1988，25(2)：71-96.
[8]	FOWELL R J. Suggested method for determining mode I fracture toughness using Cracked Chevron Notched Brazilian Disc(CCNBD) specimens[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1995，32(1)：57-64.
[9]	KURUPPU M D，OBARA Y，AYATOLLAHI M R，et al. ISRM-suggested method for determining the mode I static fracture toughness using semi-circular bend specimen[J]. Rock Mechanics and Rock Engineering，2014，47(1)：267-274.
[10]	尹祥础，颜玉定，李红，等. 不同方法测定岩石断裂韧度KIC的研究[J]. 岩石力学与工程学报，1990，9(4)：328-333.(YIN Xiangchu，YAN Yuding，LI Hong，et al. Experimental investigation on the measurement of fracture toughness KIC of rocks using different methods[J]. Chinese Journal of Rock Mechanics and Engineering，1990，9(4)：328-333.(in Chinese))
[11]	徐纪成，刘大安，孙宗颀，等. 岩石断裂韧度的国际联合试验研究[J]. 中南工业大学学报，1995，(3)：310-313.(XU Jicheng，LIU Daan，SUN Zongqi，et al. International joint experiment study for the fracture toughness of rock materias[J]. J. Cent. South Univ Technol，1995，(3)：310-313.(in Chinese))
[12]	高文蛟，单仁亮，朱永，等. 用短棒试件测试无烟煤准静态断裂韧度试验研究[J]. 岩石力学与工程学报，2006，25(增2)：3 919- 3 926.(GAO Wenjiao，SHAN Renliang，ZHU Yong，et al. Determining quasi-static fracture toughness of anthracite using short rod specimen[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(Supp.2)：3 919-3 926.(in Chinese))
[13]	崔振东，刘大安，安光明，等. V形切槽巴西圆盘法测定岩石断裂韧度KIC的实验研究[J]. 岩土力学，2010，31(9)：2 743-2 748.(CUI Zhendong，LIU Daan，AN Guangming，et al. Research for determining mode I rock fracture toughness KIC using cracked chevron notched brazilian disc specimen[J]. Rock and Soil Mechanics，2010，31(9)：2 743-2 748.(in Chinese))
[14]	DAI F，XIA K，ZHENG H，et al. Determination of dynamic rock Mode-I fracture parameters using cracked chevron notched semi-circular bend specimen[J]. Engineering Fracture Mechanics，2011，78(15)：2 633-2 644.
[15]	殷志强，谢广祥，胡祖祥，等. 不同瓦斯压力下煤岩三点弯曲断裂特性研究[J]. 煤炭学报，2016，41(2)：424-431.(YIN Zhiqiang，XIE Guangxiang，HU Zuxiang，et al. Investigation on fracture mechanism of coal rock on three-point bending tests under different gas pressures[J]. Journal of China Coal Society，2016，41(2)：424-431.(in Chinese))
[16]	赵毅鑫，孙荘，刘斌. 忻州窑烟煤I型和II型断裂特性的半圆弯曲试验对比研究[J]. 岩石力学与工程学报，2019，38(8)：1 593-1 604. (ZHAO Yixin，SUN Zhuang，LIU Bin. Comparative study of semi-circular bending tests for modes I and II fracture characteristics of Xinzhouyao bituminous coal[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(8)：1 593-1 604.(in Chinese))
[17]	ZHANG Q B，ZHAO J. Effect of loading rate on fracture toughness and failure micromechanisms in marble[J]. Engineering Fracture Mechanics，2013，102：288-309.
[18]	ZHANG Q B，ZHAO J. Determination of mechanical properties and full-field strain measurements of rock material under dynamic loads[J]. International Journal of Rock Mechanics and Mining Sciences，2013，60(8)：423-439.
[19]	WANG Q Z，FENG F，NI M，et al. Measurement of mode I and mode II rock dynamic fracture toughness with cracked straight through flattened Brazilian disc impacted by split Hopkinson pressure bar[J]. Engineering Fracture Mechanics，2011，78(12)：2 455-2 469.
[20]	GAO G，HUANG S，XIA K，et al. Application of digital image correlation(DIC) in dynamic notched semi-circular bend(NSCB) tests[J]. Experimental Mechanics，2015，55(1)：95-104.