一、前言 幌内煤矿开采的水平最深,如9水平深达-1140m。 主要系统是以入风竖井、排风竖井为中心,把每70m垂深的东西方向的煤层底板下巷道与皮带斜井组合一起,各水平的开拓是由底板下巷道的石门到达煤层。 正在开采的区域走向约3km范围,由于断层分为3个区,于几春别夹煤层中布置5—6个采煤工作面,每年向深部掘进速度约20m。 First, the forefront Sapporo coal mining the deepest level, such as the level of 9 -1140m deep. The main system is based on the intake shaft, ventilation shaft as the center, every 70m depth of the direction of the coal seam floor under the roadway and belt incline combination together, the level of development is through the stone floor under the roadway to reach the coal seam. The mining area is about 3km away. Since the fault is divided into three zones, 5-6 coalfaces are arranged in several seasons, and the tunneling speed is about 20m per year.