Air-quality measurements in a deep underground mine are a critical issue. The cost of
ventilation, as well as the geometry of the considered mine, make this process very difficult …

Coal seams that are prone to strong outbursts have low strength and cause heavy structural
damage to the seam. Their outburst risk is highly related to the release of the adsorbed …

An extremely important role in the underground method of mining deposits is the type of
access, which is the initial stage of the mining operations. The main feature of mineral …

The nature of coal and gas outburst involves the gradual damage evolution of gas-
containing coal until it becomes suddenly destroyed under the influence of mining. The …

The particle size of coal particles is an important factor affecting the physical and mechanical
properties of coal. In this study, uniaxial and triaxial compression tests were conducted to …

The aim of this work was an experimental research into the sorption properties of coal
briquettes under the various states of stress. The present state of knowledge when it comes …

The composite structure coal seam composed of coal seams with strong and weak
deformation is widely developed in the coalfields in Southwest and North China. The …

The paper presents the variability of hard coal output, methane content and methane
emissions into coal workings and into the atmosphere from the two most methane-gassy …

The aim of this paper was to investigate the repeatability of sorption processes occurring in
the coal-methane system during multiple measurement series. For research purposes, three …

Basic knowledge of the characteristics of copper-bearing rock such as dolomite is essential
to locate those areas of the deposit which have different structural and textural properties …