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Experimental Investigation on Chemical Grouting in a Permeated Fracture Replica with Different Roughness

1
School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China
2
Jiangsu Transportation Institute, Nanjing 210019, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(13), 2762; https://doi.org/10.3390/app9132762
Received: 9 May 2019 / Revised: 26 June 2019 / Accepted: 4 July 2019 / Published: 9 July 2019
(This article belongs to the Special Issue Fatigue and Fracture of Non-metallic Materials and Structures)
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Abstract

This paper presents an experimental investigation on chemical grouting in a permeated fracture replica considering its roughness. Tests of grouting with flowing water in the fracture replica were carried out under different Bardon’s standard roughness profiles. The interactions between influential factors were considered and an experimental platform for grouting in rough fractures with flowing water was established. The effect of chemical grouting in fractures with flowing water was investigated using orthogonal experiment. The joint roughness coefficient (JRC), the initial water flow rate, the gel time, and the fracture opening were selected as factors in the orthogonal experiment. The results show that there is a positive correlation between the water plugging rate and JRC, and negative correlations between the water plugging rate and the initial water flow rate, gel time, and fracture opening. The change curve of the water flow rate is divided into three categories: Single platform decreasing type, double platform decreasing type, and multi-peak fluctuating type. The curve of seepage pressure contains three categories: Single peak type, multi-peak type and platform type. The results provide a reference for grouting in rock fractures. View Full-Text
Keywords: chemical grouting; fracture; flowing water; water plugging rate; joint roughness coefficient chemical grouting; fracture; flowing water; water plugging rate; joint roughness coefficient
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Jin, L.; Sui, W.; Xiong, J. Experimental Investigation on Chemical Grouting in a Permeated Fracture Replica with Different Roughness. Appl. Sci. 2019, 9, 2762.

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