摘要
为提高井下瓦斯抽采效果,屯兰矿采用地面压裂方式提升煤层透气性,并对地面压裂钻孔布置参数、煤层增透效果等进行研究。现场应用后,地面压裂井在2#压裂范围呈现以压裂井为中心的椭圆形,长轴、短轴长度分别为100 m、40 m;压裂后煤层透气性系数、瓦斯抽采浓度及纯量分别提升227.2%、170%、158%,表明地面压裂明显提升井下瓦斯抽采效果。
In order to promote the effect of coal seam gas drainage,the surface fracturing method is adopted by Tunlan Mine to improve the coal seam gas permeability,and parameters of surface fracturing boreholes and coal seam permeability enhancement are set up.After surface fracturing is applied on site,the 2#fracturing area presents an oval shape with surface fracturing well in the center and two axes of 100 m and 40 m;after fracturing,the coal seam permeability coefficient,gas drainage concentration and purity have increased by 227.2%,170%and 158%respectively,which indicates that the surface fracturing improves the gas drainage effect significantly.
出处
《中国矿山工程》
2021年第5期60-62,共3页
China Mine Engineering
基金
山西省煤层气联合研究基金资助项目(2016012010)。
关键词
地面压裂
煤层增透
瓦斯抽采
煤炭回采
surface fracturing
coal seam permeability enhancement
gas drainage
coal stoping
