Wang Q.Z.,University of Sichuan |
Wang Q.Z.,State Key Laboratory for Geo mechanics |
Gou X.P.,University of Sichuan |
Fan H.,University of Sichuan
Engineering Fracture Mechanics | Year: 2012
The minimum dimensionless stress intensity factor of cracked chevron notched Brazilian disc specimen is the coefficient in the crucial formula for calculating the fracture toughness using the method suggested by the International Society for Rock Mechanics. This coefficient can be conveniently obtained by the analytical method based on the straight through crack assumption proposed by Munz et al. (1980) , so it is very easy to determine the upper bound on the coefficient for any cracked chevron notched Brazilian disc specimen. Furthermore, the upper bound is explained by comparing the load bearing capacity of a cracked chevron notched Brazilian disc with that of the counterpart cracked straight through Brazilian disc, this comparison identifies that the upper bound concept is inherent with sound physical significance, so violation of this upper bound for the stress intensity factor is unreasonable. © 2011 Elsevier Ltd.
Yang X.,China University of Mining and Technology |
Yang X.,State Key Laboratory for Geo mechanics |
Hou D.,China University of Mining and Technology |
Hou D.,State Key Laboratory for Geo mechanics |
And 6 more authors.
International Journal of Mining Science and Technology | Year: 2015
Landslides have occurred frequently in the Luoshan mining area because of disordered mining. This paper discusses the landforms and physiognomy, hydro-meteorology, formation lithology, and geologic structure of the Luoshan mining area. It also describes the factors influencing the slope stability of landslide No. III, determines the general parameters and typical section plane, analyzes the stress-strain state of the No. III slope, and calculates its safety factors with FLAC3D under saturated and natural conditions. Based on a stability analysis, a remote real-time monitoring system was applied to the No. III slope, and these monitoring data were collected and analyzed. © 2015 Published by Elsevier B.V. on behalf of China University of Mining & Technology.