Didenko, M. (2020) PREDICTION OF ROCK PRESSURE EFFECTS IN MINE WORKINGS IN THE ZONE OF LONGWALL FACE INFLUENCE. Resource-saving technologies of raw-material base development in mineral mining and processing. с. 487-500.

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Title in English

PREDICTION OF ROCK PRESSURE EFFECTS IN MINE WORKINGS IN THE ZONE OF LONGWALL FACE INFLUENCE

English abstract

When dredging flat coal seams using a pillar system of development, before the approach to the face, the preparatory workings go through three characteristic periods of their existence: I – in the zone of influence of the face; ІІ – outside the zone of influence of the face; ІІІ – in the zone of temporary abutment pressure in front of the longwall face. Mine research indicates significant features of the rock pressure effect in these zones. To study the distribution of stresses around the mine working developed in the zone of temporary abutment pressure of the moving longwall, a three-dimensional elastic numerical problem was solved by the finite element method. The object of the study was a rock mass in the vicinity of a single longwall de-veloping with a pillar system a flat coal seam. The subject of research is the stress-strain state of the rocks around the mine working in the zone of temporary abutment pressure of the longwall, depending on the type of roof (easily-, medium- and hard-to-break) and the length of the cantilever of suspended rocks (0-5 m for easy-breaking roof; 0-20 m for medium-breaking and 0-35 m for hard-breaking). The study and prediction of geomechanical processes that is realized around the longwall face will significantly solve the problem of the stability of mine workings.

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