Assessment of sudden soil faults hazard when developing a coal seam

Purpose. Development of a methodology for assessing the occurrence sudden fractures in soil on example development seam d6 Karaganda coal basin. Methodology. Theoretical and experimental studies gas content seam, analysis technologies its development. Findings. Studies have shown that overworked massif with without breakthrough methane are same nature. A necessary condition formation (SFSS) mine is presence pack or rock reduced strength high soil; this case, into occurs only if cracks formed workings reach sources release gas-bearing layers (interlayers) coal. Originality. predictive indicator hazard SFSS working face proposed, dimensionless criterion which product coefficients reflecting influence depth, width bottomhole zone, thickness protective layer, crumpled lower longwall withdrawal from assembly chamber, length face. nomogram developed risk reservoir d6. Practical value. According to results research, it was proposed predict at design stage, early implementation regional measures their prevention. To assess WSP, be used prevention SFSS, includes advanced seams, reduce ability delaminate change technology mining intensive degassing use interval hydraulic fracturing.