Open AccessExperimental Research on Shear Strength Characteristics of Unsaturated Coal-Bearing Soils under Dry-Wet Circulation
Author(s) -
Yakun Fan,
Mingxin Zheng,
Junhua Wu
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/719/4/042068
Subject(s) - cohesion (chemistry) , water content , coal , geotechnical engineering , direct shear test , soil water , shear (geology) , moisture , friction angle , shear strength (soil) , bearing (navigation) , materials science , geology , composite material , soil science , chemistry , waste management , engineering , cartography , organic chemistry , geography
In this paper, the shear strength experiment of unsaturated coal-bearing soil under dry-wet circulation was carried out on the conventional direct shear apparatus, the relationship between shear strength and its index parameters and water content of unsaturated coal-bearing soil was obtained. The tests show that the total stress shear strength of unsaturated coal-bearing soil was obviously affected by moisture content, and the shear strength decreases with the raise of moisture content, and the total cohesion and total internal friction angle of unsaturated coal-bearing soil are greatly affected by moisture content, which decreases with the raise of water content.