Method and equipment for boring and casing air vent holes and/or
delivery holes in medium-steep and steep dip coal deposits and rocks of
loose structure
    2.
    发明授权
    Method and equipment for boring and casing air vent holes and/or delivery holes in medium-steep and steep dip coal deposits and rocks of loose structure 失效
    陡峭和陡峭沉积的沉积物和松散结构的岩石的镗孔和套管通气孔和/或输送孔的方法和设备

    公开(公告)号:US4558748A

    公开(公告)日:1985-12-17

    申请号:US693314

    申请日:1985-01-22

    CPC分类号: E21B19/00 E21B7/20 E21B7/28

    摘要: Forming a hole between lower and upper parallel galleries formed in a mine by boring upwardly from the lower gallery a bore hole having a first length equal to a fraction of the distance between the lower and upper galleries, then casing the bore hole by thrusting upwardly at least one pipe section having a diameter sufficient to be gripped by the shrinkage of the bore hole into the bore hole. Boring upwardly after casing the first length by a further length equal to a fraction of the distance between the lower and upper galleries, then casing the newly formed further length of the bore hole by thrusting upwardly at least one further pipe section having a diameter less than the inside diameter of any pipe sections previously disposed in the bore hole and sufficient to be gripped by the shrinkage of the newly formed further length of the bore hole through the any previously disposed pipe sections into the newly formed further length of the bore hole, and then repeating the two previous steps of boring a further length and casing the newly formed further length until the upper gallery is reached.

    摘要翻译: 在下矿藏中形成的下和上平行画廊之间形成一个孔,从下槽向上钻孔,孔的第一长度等于下画廊与上画廊之间的距离的一部分,然后通过向上推动钻孔 至少一个管段,其直径足以通过钻孔的收缩进入钻孔中。 在第一长度的套管之后向上镗孔等于下部和上部画廊之间的距离的一小部分的另外的长度,然后通过向上推动新形成的钻孔的另一长度,至少一个直径小于 预先设置在钻孔中的任何管段的内径,足以由新形成的钻孔的另外长度通过任何预先设置的管段的收缩夹持到新形成的钻孔的另一长度中; 然后重复两个先前的步骤,镗孔一个更长的长度,并套住新形成的更长的长度,直到到达上廊。