Sebastian Iwaszenko

Computer Software Supporting Rock Stress State Assessment for Deep Coal Mines

Underground deep mining always influences the surrounding rock mass. The excavated voids cause changes in stress fields in their neighbourhood, which can lead to rock bursts. This can cause very serious threat to working people and equipment. Thus properly determined or predicted rock mass state is a crucial information for many purposes in mining activity. Not only does it allow to identify potential rock burst hazard in advance, but it also allows to design the parameters of mining technologies and excavation schedule to minimize the risk. One of the most important parameters describing the rock conditions is the seismic wave propagation anomaly, related to the rock mass stress state.

MercuryDb - A Database System Supporting Management and Limitation of Mercury Content in Fossil Fuels

Mercury is commonly known as a harmful element for environment and human beings. Due to the high mobility and lack of degradation in environment, reduction of mercury emission became one of the main fields of limitation in its adverse impact on environment and health. The database systems, addressed in gathering, transforming and disseminating information about mercury sources, ways of transportation in environment and technologies used to limit its influence, can be a useful management supporting tool. It can help scientists, stakeholders and decision makers in straggle to restrict mercury influence on people’s lives and environment.