煤层钻孔周围应力场的分析与模拟

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

煤矿瓦斯灾害一直是世界采矿业中的重大灾害之一,瓦斯抽采是积极防治的有效措施.为了研究地应力等因素对煤层钻孔周围应力的影响,从理论上分析了煤层钻孔周围的应力情况,并利用UDEC数值模拟软件对晋煤集团寺河矿工作面埋深370 m直径为95 mm的钻孔进行数值模拟,通过研究其周围应力场的变化规律,分析了钻孔周围的地应力等各种因素对煤层钻孔周围应力场的影响.

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 sim- ulation 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 ana- lysed how did various factors of arounding coal field influence the stress field around the coal seam drilling.