Numerical simulation on stability of large goaf group base on FLAC^3D

According to the distribution of goaf group in a certain mine, first of all, the large goaf group of 10 500 000 m³ were detected using high-precision BLSS-PE, and then the stability of goaf group was analyzed with numerical simulation software-FLAC^3D.The results show that, the plastic damage areas of the many pillars existed, and the hanging and lower walls on the goaf group tensile damage occurred.These damage areas were a potential safety hazard, and easy to occur mass caving.