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	Experimental study on relationship between hydraulic aperture and rock-water dissolution of granite
	Shen, Linfang ; Feng, Xiating ; Pan, Pengzhi ; Yang, Jinbao
	2012
英文摘要	Coupled hydro-mechanical-chemical experiments were conducted to study the hydraulic aperture and water-rock dissolution of granite. The granite specimens used in the experiments were from the potential site for high level nuclear waste disposal in Beishan, Gansu province, China. An artificial fracture was created by splitting the specimen in the vertical direction to represent the discontinuity. A constant axial compressive load 150MPa and confinement 10MPa were applied on the specimen. A chemical solution (Na2SO4) was injected into the rock specimen with 1MPa hydraulic pressure. Experimental results show a significant influence of water-rock dissolution on hydraulic aperture and fracture surface modification. Fracture surfaces were smoother after experiment under chemical solution and widely distributed etch pits can be found on mineral surface. Results indicate high Gibbs energy is generated by stress application leading to fluid-rock dissolution far from equilibrium and acceleration of reaction rate. Meanwhile, these dissolutions mainly occur at loaded face obeying the model of 'water film diffusion'. Copyright 2012 ARMA, American Rock Mechanics Association.; EI; 0
语种	英语
内容类型	会议论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/316778]
专题	工学院
推荐引用方式 GB/T 7714	Shen, Linfang,Feng, Xiating,Pan, Pengzhi,et al. Experimental study on relationship between hydraulic aperture and rock-water dissolution of granite[C]. 见:.

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