Geotechnical aspects of design and mining coal deposits with combined (opencast and underground) method
Scientific and practical experience of Siberian Institute of Geotechnical Investigations in the field of geotechnical problem solving in mining coal deposits of Kuzbass with combined method, heighten the fullness of extracting coal resources in licensed borders have been considered. Combined mining is supported with the development of complex geomechanical processes which happen in a rock massif. It makes difficult to predict combined technological characteristics. The definition and classification of combined mining are suggested. It lets evaluate the changings of geomechanical and hydrological, gasodynamical condition of anthropogenic rock massif and earth’s surface in different variations of combined mining of coal deposits in particular mining and geological conditions. The generalized methodical data of reservoir hydrometry are given and also the evaluation of its hydrolic connection with mining design. The algorithms of magnitude displacement forecast and rock massif and earth’s surface deformation are developed. Mutual influence of opencast and underground mining with a glance of geomechanical processes are taken into consideration. Using of these algorithms in problem solving of sale mining provides reasonableness and operability of design decision making. The necessity of nontraditional technological application for additional work of coal reserves in licensed deposit borders are established. The question of automation monitoring at coal deposits is raised. They are developing combined method which let higher industrial and ecological safety at coal mining enterprise.