Aiming at accident perils such as large-sized mined-out area in Dachang Mining District in Guangxi province,a site survey had been made.According to this,it was decided to use backfill so that partition control,multilayer protecting and enclosing of mined-out area were implemented.In addition,the effective measures of water prevention and control were taken and the real-time ground pressure monitoring techniques were used to solve problems on control of special accident perils having an impact on this mine for many years.Meanwhile,the geological environment in this mining district has been controlled completely also.This provides safe condition and good environment for exploitation and utilization of resources in Dachang Mining District.