Shan-Kun Zhao

Combined Protection Technology in Deep High In Situ Stress Environment of Metal Mines

Deep mining operations in metal mines face escalating challenges from high in situ stress environments, where conventional single-method ground control approaches often prove insufficient. This study proposes an innovative combined protection technology integrating four synergistic components: (i) prestressed rock bolt...

Multi-Factor Coupling Simulation and Mechanism Investigation of Hydraulic Fracture Propagation in Hard Roof

The propagation behavior of hydraulic fractures in deep hard roofs is governed by the multi-factor coupling of injection rate, in situ stress, and fluid viscosity. Taking the Cuimu coal mine as the engineering background, this study systematically investigates the effects of injection rate, lateral pressure coefficient...

Loading-angle-dependent rate effects on dynamic mixed-mode I/II fracture behavior of coal-measure sandstone

Sandstone roof strata in deep coal mining are frequently subjected to impact disturbances, and their dynamic mixed-mode fracture response is closely related to crack initiation, propagation, and instability of surrounding rock. Previous studies have addressed rate-dependent dynamic fracture and angle-dependent mixe...

Experimental study on uniaxial compression mechanical properties and fracture fractal characteristics of dense sandstone under different temperature conditions