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针对急倾斜中厚煤层由于倾角增大导致采用传统爆破方法施工开切眼存在难度大、安全威胁大、防突困难、片帮飞矸严重、人员站位定位困难等问题,创造性提出2种施工方法。采用钻机从下至上钻孔再逐级扩孔施工先导钻孔准确定位形成下煤通道,再从上往下进行扩刷,初始伪俯斜布置,之后切换为真倾斜,为急倾斜中厚煤层开切眼施工提供指导和借鉴意义。
In view of the problems that the steep-inclined medium-thick coal seam caused by the traditional blasting method to cut the open cut due to the increase of the incline angle is difficult to solve, the safety threat is large, the prevention of sudden interference is difficult, the gangue gangue is serious and the positioning of the personnel station is difficult. method. Drilling rig from bottom to top and then step by step reaming construction pilot drilling accurate positioning of the formation of coal passage, and then from the bottom to expand the brush, the initial pseudo-tilt arrangement, then switch to true tilt, for the steeply inclined thick seam Open cut eye construction provide guidance and reference.