Higher rank aerological risks in coal mines

Abstract

The steady trend of complication of mining and geological factors in underground coal mining and at the same time the processes of mining intensification cause growth of dynamic manifestations of natural factors of mining, such as sudden coal and gas outbursts, rock bursts, rock collapses, leading to gas and dust explosions and fires. This requires developing the models of different phenomena manifestation risks, which enable improving the process safety of a mining enterprise. In this study, based on the methodology of aerological risk assessment in coal mines, a structural analysis of aerological risks was carried out. The criteria of hazard of mining-geological and mine engineering factors and vulnerability of schemes and methods of ventilation, ventilation facilities, and main fans were developed. A hierarchical structure of aerological risks of higher ranks was developed. The presented risk structure allows determining the area of superposition of hazards of coal mining and vulnerability of ventilation systems for each mine and its individual facilities, as well as quantifying these areas in the form of aerological risks. The ranges of aerological risk values of higher ranks for super-category mines and mines hazardous by sudden coal and gas outbursts for different ventilation modes were established. The presented methodology enables forecasting and reducing aerological risks in course of designing, operation, liquidation, and conservation of coal mines.

Determination of the miners’ individual injury risk as a result of the dynamic manifestation of rock pressure

“…In the event that the obtained value exceeds the value of 2.5 10 -4 year -1 (the average value of the individual risk in the professional sphere), it is proposed to carry out organizational and technical measures aimed at preventing rock bursts [18,19,20].…”

Technogenic Reservoirs Resources of Mine Methane When Implementing the Circular Waste Management Concept

“…The second is improving the system of monitoring the pollutants [12]. The third is the introduction of low-carbon technologies, including the formation of cadasters and technologies that reduce greenhouse gas emissions [13,14]. The fourth is digitalization of the power and extractive industries, and increasing the energy efficiency of production processes [15][16][17] involved in the development and implementation of negative emission technologies [18].…”

The influence of the mine dust mineral composition on the characteristics of thermal destruction processes

“…Changes in the conditions of underground coal mining, associated with the emergence of complicating mining and geological factors, as well as with the intensification of mining operations due to the use of modern high-performance equipment, are accompanied by an increase in various natural and manmade dynamic manifestations that negatively affect production safety [1,2]. One of these hazards, characteristic of coal mining enterprises, is thermal processes that arise under certain conditions in mine dust and lead to fires in mine workings and goafs [3][4][5]. Since mine dust in mine workings includes both coal particles and particles of host rocks, the risk of a thermal reaction is also determined by its mineral composition, or rather the percentage of coal and mineral inclusions.…”