文献类型：期刊文献

英文题名：Investigation of Pore Structure and Water Imbibition Behavior of Weakly Cemented Silty Mudstone

作者：Wang, Shuai Han, Lijun Meng, Qingbin Jin, Yuhao Zhao, Weisheng

第一作者：Wang, Shuai

通信作者：Han, LJ[1]

机构：[1]China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Jiangsu, Peoples R China;[2]Guizhou Inst Technol, Inst Min Engn, Guiyang 550003, Peoples R China

第一机构：China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Jiangsu, Peoples R China

通信机构：corresponding author), China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Xuzhou 221116, Jiangsu, Peoples R China.

年份：2019

卷号：2019

外文期刊名：ADVANCES IN CIVIL ENGINEERING

收录：;Scopus(收录号：2-s2.0-85068590170);WOS:【SCI-EXPANDED(收录号:WOS:000485193600001)】；

基金：The first author is grateful to all the co-authors for providing innovative ideas, the State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, for providing instruments to conduct the research, and Xiyi Coal Mine, subordinated by China Resources Power Holdings Company Limited, for providing geological data and rock cores. This study was supported by the National Natural Science Foundation of China (Nos. 51574223 and 51704280), Guizhou Science and Technology Support Plan Project (GZSCCB, No. [2018]1061), and Guizhou Provincial Department of Education Youth Science and Technology Talent Growth Support Project (GZSCC No. [2017]219).

语种：英文

摘要：Water-rock interaction of weakly cemented mudstone is intense due to its complex pore structure and mineral compositions. As primary channels for water imbibition, pore structures determine water migration. In this paper, pore properties of weakly cemented mudstone are measured by scanning electron microscopy (SEM), nitrogen adsorption/desorption (NAD), and mercury intrusion porosimetry (MIP), respectively. Water imbibition tests under free and lateral restraints are performed on self-developed water absorption instruments. The results show that skeleton aggregates, pore zone, and fissure zone constitute the basic structure of the rock, together with pore scales in nanoscale, submicron-scale, and micron-scale, respectively. The porosities of each zone are inferred with the values of 13.5%, 7.3%, and 2.3% by comparison of different methods. The main pore type is mesopore. Based on water imbibition tests, water rises along the large fissure and pore zones initially. Pores in the skeleton aggregates absorb water from pore and fissure zones subsequently. However, water imbibition is limited under lateral restraints. Owing to lateral restraints, the ascending height and rate of the sample with lateral restraints are lower than those of the sample with free confinements. The results suggest that lateral restraints can restrain water migration and water-rock interaction for weakly cemented mudstones, and measures can be taken to control swelling deformation by strengthening lateral restraints.