Qiang Zhao

Stress-path diagnosis of coal-roof damage in conglomerate-bearing open-pit bench blasting

Near-seam open-pit bench blasting in conglomerate-bearing overburden must break the rock mass while limiting coal-roof damage. Peak stress is often used as a screening variable, but it cannot describe the pressure-dependent response of coal. This study treats coal-roof damage as a stress-path problem using a two-dime...