不同块度煤系软岩崩解性室内试验研究
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摘要
煤系软岩遇水易软化崩解,基于不同块度煤系软岩的崩解性室内试验,探讨了干湿循环作用下煤系软岩耐崩解性指数和崩解物粒径分布的变化规律,并分析了产生崩解的原因。试验结果表明:(1)随着干湿循环次数的增加,煤系软岩耐崩解性指数呈指数关系降低,且降幅主要发生于前3次循环,并以第一次干湿循环所致降幅最大;(2)不同块度煤系软岩的崩解物均可定名为级配不良砂,其中0.5～5 mm粒径的颗粒含量能较为清楚地反映煤系软岩崩解进程,故建议该粒径范围作为评定煤系软岩崩解稳定的标准之一。
Due to the coal measure strata soft rock is prone to softening and disintegrating,based on the test of collapsing in laboratory of different block of coal measure strata soft rock,the slaking durability index and the variation of shape and size of slaking pieces of soft rock under wet and dry cycles were discussed,and the reason of disintegration was analysed. The results are as follows:( 1) the decrease of coal measure strata soft rock slaking durability index follows an exponent relationship with the increase of slaking cycle times. The index was mainly decreased in previous three cycles,the largest decline is caused by first circulation.( 2) The slaking pieces of different block of coal measure strata soft rock can be named as bad graded sand. The grain contents between 0.5 mm ～5 mm could reflect the rate and degree of slaking obviously,so the above particle size range is suggested to be an evaluate standard to the slaking stability of coal measure strata soft rock.
Due to the coal measure strata soft rock is prone to softening and disintegrating,based on the test of collapsing in laboratory of different block of coal measure strata soft rock,the slaking durability index and the variation of shape and size of slaking pieces of soft rock under wet and dry cycles were discussed,and the reason of disintegration was analysed. The results are as follows:( 1) the decrease of coal measure strata soft rock slaking durability index follows an exponent relationship with the increase of slaking cycle times. The index was mainly decreased in previous three cycles,the largest decline is caused by first circulation.( 2) The slaking pieces of different block of coal measure strata soft rock can be named as bad graded sand. The grain contents between 0.5 mm ～5 mm could reflect the rate and degree of slaking obviously,so the above particle size range is suggested to be an evaluate standard to the slaking stability of coal measure strata soft rock.
引文
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[15]刘长武,陆士良.泥岩遇水崩解软化机理的研究[J].岩土力学,2000,21(1):28-31.(Liu Changwu,Lu Shiliang. Research on mechanism of mud-stone slaking and softening in water[J]. Chinese Journal of Rock and Soil Mechanics,2000,2(1):28-31.(in Chinese))
[2]柴肇云,张亚涛,张学尧.泥岩耐崩解性与矿物组成相关性的试验研究[J].煤炭学报,2015,40(5):1188-1193.(Chai Zhaoyun, Zhang Yatao, Zhang Xueyao. Experimental investigations on correlation with slake durability and mineral composition of mudstone[J]. Chinese Journal of China Coal Society,2015,40(5):1188-1193.(in Chinese))
[3]曹运江,黄润秋,郑海君,等.岷江上游某水电站工程边坡软岩的崩解特性研究[J].工程地质学报,2006,14(1):35-40.(Cao Yunjiang,Huang Runqiu,Zheng Haijun,et al. Slaking characteristics of soft rock of The engineering slope in a hydroelectrlic station in the southwest of China[J]. Chinese Journal of Engineering Geology,2006,14(1):35-40.(in Chinese))
[4]吴道祥,刘宏杰,王国强.红层软岩崩解性室内试验研究[J].岩石力学与工程学报,2010,29(增2):4173-4179;(Wu Daoxiang, Liu Hongjie, Wang Guoqiang. Laboratory experimental study of slaking characteristics of red-bed soft rock[J].Chinese Journal of Rock Mechanics and Engeering,2010,29(Supp.2):4173-4179.(in Chinese))
[5]赵明华,苏永华,刘晓明.湘南红砂岩崩解机理研究[J].湖南大学学报(自然科学版),2006,33(1):16-19.(Zhao Minghua,Su Yonghua,Liu Xiaoming.Research on the mechanics of the swelling and collapse of the red stratum rock mass in south hunan[J].Chinese Journal of Hunan University(Natural Sciences Edition),2006,33(1):16-19.(in Chinese))
[6]苏永华,赵明华,刘晓明.软岩膨胀崩解试验及分形机理[J].岩土力学,2005,26(5):728-732.(Su Yonghua,Zhao Minghua,Liu Xiaoming. Research of Fractal Mechanism for Swelling and Collapse of Soft Rock[J]. Chinese Journal of Rock and Soil Mechanics,2005,26(5):728-734.(in Chinese))
[7]苏永华,刘晓明,赵明华.软岩膨胀物颗粒分布特征研究[J].土木工程学报,2006,39(5):102-106.(Su Yonghua,Liu Xiaoming,Zhao Minghua. Research on the grading of soft rock crumbling pellets[J].Chinese Journal of Civil Engineering Journal,2006,39(5):102-106.(in Chinese))
[8]张丹,陈安强,刘刚才.紫色泥岩水热条件下崩解过程的分维特性[J].岩土力学,2012,33(5):1341-1346.(Zhang Dan, Chen Anqiang, Liu Gangcai.Disintegration characteristics of purple mudstone based on fractal dimension under hydrothermal condition[J].Chinese Journal of Rock and Soil Mechanics,2005,26(5):1341-1346.(in Chinese))
[9]罗根传,付宏渊,贺炜.炭质页岩崩解特性的试验研究[J].中外公路,2012,32(6):309-311.(Luo Gengchuan, Fu Hongyuan, He Wei. Slaking characteristics of carbonaceous shale[J]. Chinese Journal of China and Foreign Highway,2012,32(6):309-311.(in Chinese))
[10]颜文,周丰峻,郑明新.长衡段软岩水理特性研究[J].华东交通大学学报,2005,22(2):15-18.(Yan Wen,Zhao Fengjun,Zhen Mingxin. Study on hydrolytic weakening properties of changheng soft rocks[J].Chinese Journal of East China Jiaotong University,2005,22(2):15-18.(in Chinese))
[11]赵明华,邓觐宇,曹文贵.红砂岩崩解特性及其路堤填筑技术研究[J].中国公路学报,2003,16(3):1-4;(Zhao Minghua,Deng Jinyu,Cao Wengui. Study of the disintegration character of red sandstone and the construction techniques of red sandstone embankment[J]. Chinese Journal of Highway and Transport,2003,16(3):1-4.(in Chinese))
[12]中华人民共和国住房和城乡建设部.工程岩体试验方法标准(GB/T50266-2013)[S].北京:中国计划出版社,2013.(Ministry of Housing and Urban-Rural Development. Standard for tests method of engineering rock massas(GB/T50266-99)[S]. Beijing:China Planning Press,1999.(in Chinese))
[13]康天合,柴肇云,王栋,等.物化型软岩块体崩解特性差异的试验研究[J].煤炭学报,2009,34(7):907-911.(Kang Tianhe,Chai Zhaoyun,Wang Dong,et al.Experimental study on block disintegration difference of physicochemical soft rock[J]. Chinese Journal of China Coal Society,2009,34(7):907-911.(in Chinese))
[14]孔德坊.工程岩土学[M].北京:地质出版社. 1991.(Kong Defang. Science of engineering rock and soil[M]. Beijing:Geological Publishing House,1991.(in Chinese))
[15]刘长武,陆士良.泥岩遇水崩解软化机理的研究[J].岩土力学,2000,21(1):28-31.(Liu Changwu,Lu Shiliang. Research on mechanism of mud-stone slaking and softening in water[J]. Chinese Journal of Rock and Soil Mechanics,2000,2(1):28-31.(in Chinese))