Numerical simulation research in soft rock mine of goaf caving height

After long-term sedimentary structure effect, the coal face roof rock itself appeares various fractures and after mining the coal, owing to mine pressure appeared, part of goaf overburden rock gradually become distortion,delamination even fall. Due to the collapse of roofs, formation of air disasters are related to the caving height. Therefore, study the caving height is a key factor of realizing mine safe and effective production. This paper bases on the background of One Mine, using UDEC to study 5-3s soft rock mine working face of goaf caving height, first weighting interval and cycle weighting interval. By analyzing the simulation results, it reflects the relationship between advancing degree of working face and the goaf caving height. The conclusion provides a reference for resolving the problem of mine roof collapse in similar mine.