Analysis and simulation on the stress field of the borehole surrounding in coal seam

Coal gas disaster in the mining industry has been one of the major disasters.Gas extraction is one positive and effective measure.In order to study the influence from the factors of around coal seam drill ground stress around,this paper analyzed the stress level surrounding the oretically seam drill by using numerical simulation software UDEC.It takes numerical simulation research to Shanxi coal mining group Sihe coal mine 370m buried depth of drilling 95mm diameter.Through studying the variation of arounding stress field,it analysed how did various factors of arounding coal field influence the stress field around the coal seam drilling.