Study on ground movement and deformation of deep partial extraction along the dip in deepth

In order to increase the extraction rate of coal resources and extend the service year, Meiyinzi coal mine mined village protection pillars by using partial extraction along the dip in deepth, established special ground movement observation stations and conducted the observation for many times. Through sorting out and analyzing the observation data, ground movement deformation law when using partial extraction along the dip in this area has been obtainted, and prediction paramaters of probability integration method have been calculated. These research results will provide scientific evidence for safe mining under buildings in mines of northern Anhui province and some other mines with similar mining condition.