吉林省珲春煤矿英安主井为斜井,设计斜长1515米,净断面8.5米~2,掘进断面14米~2,坡度17度。井筒穿过第四纪亚砂土7～8米,其下为第三纪浅灰色粉砂岩、泥页岩和风化裂隙带,累计32～33米,最后进入基岩层。上段表土层里筑混凝土碹,下部为花岗岩料石碹,临时支护采用梯形木棚。井筒于1977年开始施工,掘至176.5米遇到一倾角 The Ying’an main shaft of Hunchun Coal Mine in Jilin Province is an inclined shaft with a designed length of 1515m and a net section of 8.5m ~ 2. The heading section is 14m ~ 2 and the slope is 17o. The wellbore traverses the Quaternary sandstone 7-8 meters below which the Tertiary light gray siltstone, shale and weathering fractured zone have accumulated 32-33 meters and finally entered the bedrock. In the upper surface of the soil to build concrete 碹, the lower part of granite stone 碹, temporary support using trapezoidal shed. The wellbore began construction in 1977 and dug 176.5 meters to a dip