Mingzhong Gao

TL;DR: In this paper, a preliminary case investigation of the coal at various mining rates in both the laboratory scale and field scale was performed, where the uniaxial compressive strength and releasable elastic strain energy (Ue) increase with increasing loading rate when the loading rate is below a threshold.

TL;DR: In this paper, the authors studied the tensile strength and deformation of deep coal samples recovered from 1000m or deeper using a rock mechanics testing system called MTS815 Flex Test GT.

TL;DR: In this paper, the effects of depth on the in situ stress environment and physical properties of coal were considered, and triaxial compression experiments on 128 coal samples were conducted on this basis.

TL;DR: In this article, the authors put forward the technical conceptualization of fluidized mining for deep underground solid mineral resources, which refers to the in-situ conversion of deep underground mineral resources into gas, liquid, or a mixture of gas/liquid/solid states to achieve unmanned intelligent underground mining-sorting-backfilling and conversion into heat-power-syngas with the aid of the underground fluidised mining and conversation chamber.

TL;DR: Wang et al. as discussed by the authors proposed a mining-enhanced permeability model to characterize the evolution of coal and other rocks and derived a theoretical expression for the new parameter from the Tablet Fluid model.