深部软岩与水作用后的强度软化特性及化学分析

doi:10.13722/j.cnki.jrme.2017.1178

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Abstract

A series of fresh and dried rock samples from Daqiang coal mine were conducted by intelligent testing system for water absorption in deep soft rocks(a self-developed experimental system)，including tests of water absorption with pressure and without pressure. Then，uniaxial compressive strength tests were applied to obtain the characteristics of the strength weakening processes of the rocks after interacting with water in two different original states. The results demonstrated that the strength of deep soft rock after absorbing water decreased linearly with the increasing of water ratio. Comparing to the speed of the strength decline of rock specimens with and without water pressure，it could be found that the former was slower. The speed of the strength declining of dried rock samples was faster than that of fresh rock samples in the process of water absorbing. To better understand the mechanism for weakening of soft rocks in deep mines when absorbing a certain volumes of water，variances of chemical compositions of aqueous and microstructures of the rock samples were analyzed before and after water absorption tests，and the analysis demonstrated that：when interacting on water，clay minerals of the soft rock generally showed a series of interfacial phenomenon，and it caused the solution of soluble minerals and ionic exchange in the rock，and then it led to the dissolution and secondary of minerals. It can be concluded that the dissolution and secondary of minerals contribute to the variances of the concentration of ions and the strength softening of the rock specimens after absorbing water.

Key words： rock mechanics deep soft rock water absorption tests strength softening chemical analysis microstructures

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	Articles by authors
	GUO Hongyun1
	ZHAO Jian2
	LIU Peiyu3

Cite this article:

GUO Hongyun1,ZHAO Jian2,LIU Peiyu3. Experimental studies and chemical analysis of water on weakening behaviors of deep soft rock[J]. , 2018, 37(S1): 3374-3381.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2017.1178 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/IS1/3374

[1]	丁抗. 水岩作用的地球化学动力学[J]. 地质地球化学，1989，17(6)：29-33.(DING Kang. Geochemical dynamics of water-rock interaction[J]. Chinese Journal of Geology and Geochemistry，1989，17(6)：29-33.(in Chinese))
[2]	汤连生，王思敬. 工程地质地球化学的发展前景及研究内容和思维方法[J]. 大自然探索，1999，18(2)：35-40.(TANG Liansheng，WANGSijing. Prospects and ways of thinking and research content on engineering geology and geochemistry[J]. Chinese Journal of Discovery of Nature，1999，18(2)：35-40.(in Chinese))
[3]	KONG HL，MIAO XX，WANG LZ，et al. Analysis of the harmfulness of water-inrush from coal seam floor based on seepage instability theory[J]. Mining Science andTechnology，2006，17(4)：453-458.
[4]	FENG MM，MAO XB，BAI HB，et al. Analysis of water insulating effect of compound water-resisting key strata in deep mining[J]. Mining Science andTechnology，2007，17(1)：1-5.
[5]	GUO H Y，LI B，ZHANG Y M，et al. Hydrophilic characteristics of soft rock in deep mines[J]. International Journal of Mining Science and Technology，2015，25(2)：177-183.
[6]	冒海军. 板岩水理特性实验研究与理论分析[博士学位论文][D].武汉：中国科学院武汉岩土力学研究所，2006.(MAOHaijun. Geotechnical engineering experiment studies and theoretical analysis of water-weakening properties of slates[Ph. D. Thesis][D]. Wuhan：Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，2006.(in Chinese))
[7]	周翠英，邓毅梅，谭祥韶，等. 软岩在饱水过程中水溶液化学成分变化规律研究[J]. 岩石力学与工程学报，2004，23(22)：3 813- 3 817.(ZHOU Cuiying，DENG Yimei，TAN Xiangshao，et al. Testing study on variation regularities of solution components in saturation of soft rocks[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(22)：3813-3817.(in Chinese))
[8]	KENIS I，URAI J L，VAN DER ZEE W，et al. Mullions in the High-Ardenne Slate Belt(Belgium)：numerical model and parameter sensitivity analysis[J]. Journal of Structural Geology，2004，26(9)，1677-1692.
[9]	GUO H Y，HE M C，SUN CH，et al. Hydrophilic and strength- softening characteristics of calcareous shale in deep mine[J]. Journal of Rock Mechanics and Geotechnical Engineering，2012，4(4)：344-351.
[10]	朱珍德，邢福东，王思敬，等. 地下水对泥板岩强度软化的损伤力学分析[J]. 岩石力学与工程学报，2004，23(增2)：4 739-4 743. (ZHU Zhengde，XING Fudong，WANG Sijing，et al. Analysis on strength softening of argillite under groundwater by damage mechanics[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(Supp.2)：4 739-4 743.(in Chinese))
[11]	周翠英，邓毅梅，谭祥韶，等. 饱水软岩力学性质软化的实验研究与应用[J]. 岩石力学与工程学报，2005，24(1)：33-38.(ZHOU Cuiying，DENG Yimei，TAN Xiangshao，et al. Experimental research on the softening of mechanical properties of saturated soft rocks and application[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(1)：33-38.(in Chinese))
[12]	郭富利，张顶立，苏洁，等. 地下水和围压对软岩力学性质影响的实验研究[J ]. 岩石力学与工程学报，2007，26(11)：2 324-2 432.(GUO Fuli，ZHANG Dingli，SU Jie，et al. Experimental study on influences of ground water and confining pressure on mechanical behaviors of soft rocks[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(11)：2324-2432.(in Chinese))
[13]	GUO H Y，LEI X Y，ZHANG Y M，et al. Experimental research on hydrophilic characteristics of natural soft rock at high stress state[J]. International Journal of Mining Science and Technology，2015，25(3)：489-495.
[14]	HADIZADEH J. Water-weakening of sandstone and quartzite deformed at various stress and strain rates[J]. International Journal of Mining Science and Technology，1991，28(5)：431-439.
[15]	谢和平，陈忠辉. 岩石力学[M]. 北京：科学出版社，2004：144-145.(XIEHeping，CHENZhonghui. Rockmechanics[M]. Beijing：Science Press，2004：144-145.(in Chinese))
[16]	周翠英，邓毅梅，谭祥韶，等. 软岩在饱水过程中微观结构变化规律研究[J]. 中山大学学报：自然科学版，2003，42(4)：98-102.(ZHOU Cuiying，DENG Yimei，TAN Xiangshao，et al. Variancesof micro-structures of soft rocks in saturation[J]. Acta Scientiarum Naturalium Universities Sunyatseni，2003，42(4)：98-102.(in Chinese))
[17]	何满潮，周莉，李德建，等. 深井泥岩吸水特性实验研究[J]. 岩石力学与工程学报，2008，27(6)：1 113-1 120.(HEManchao，ZHOULi，LI Dejian，et al. Experimental research on hydrophilic characteristics of mud-stone in deep well[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(6)：1 113-1120.(in Chinese))
[18]	李洪志，何满潮. 膨胀型软岩力学化学性质研究[J]. 煤炭地质，1995，4(6)：9-12.(LI Hongzhi，HE Manchao. The study on the mechanical and chemical properties of swelling soft rock[J]. Journal of Coal，1995，4(6)：9-12.(in Chinese))