Assessment of social and environmental risks on opencast coal mines

Risk assessment of flooded equipment revitalization on opencast coal mine Tamnava-West Field

“…Risks can be divided into controlled risks, which are predictable and could have short-term planned control in the opencast mine area, and uncontrolled risks, which are related to external influences whose occurrence cannot be predicted short-term and as a rule relate to the contour of the mine. Uncontrolled risks, which are particularly related to ecological hazards like in this case, may have catastrophic consequences on mining and lead to a prolonged suspension of work, as well as a complete closure of the opencast mine with great losses [22].…”

“…Reducing the probability of failure is the most effective way of managing risks, rather than analysing and subsequently removing the consequences of unwanted events. Risk is essentially an unreliability, and its value is the probability of complementing the reliability up till value one [22].…”

“…The halt of production due to the flood also caused huge losses. Mine rehabilitation lasted for 6 months, and in that time the production loss was 15 million euros, which is 2.5 million loss per month or rather 500,000 per excavator monthly [22]. That loss also has to be added to the uncontrolled risk, in addition to the costs of fixing the mechanization from Tab.…”

Evaluation Methodology of Open-Pit Mine Overall Slope Failure Risks

“…In all phases of operation and development of an open-pit mine, there is a risk of an unforeseen random occurrence of a mining process failure with significant and even catastrophic consequences [1]. Risks arise from a series of natural-external, technical, and technological-internal characteristic variables.…”

“…The stability of slopes in open-pit mines is extremely important considering the safety, economic, and environmental aspects [1,2], which include a series of discrete stochastic processes and relatively frequent changes in the internal and external environment [3,4]. The influence of unstable ground in the slope zone of the surface mine must not be ignored because it can lead to temporary or permanent closure of the mine.…”