Beijing China Coal Mine Engineering Company Limited.Beijing 100013 ChinaSchool of Civil and Resource Engineering University of Science and Technology Beijing.Beijing 100083 China;
School of Civil and Resource Engineering University of Science and Technology Beijing.Beijing 100083 China;
Beijing China Coal Mine Engineering Company Limited.Beijing 100013 China;
School of Mining and Geomatics Hebei University of Engineering.Handan 056038.China;
Weakly cemented sandstone; Renormalization group method; Damage and failure; Threshold;