利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

3 条记录 (耗时 0.01 秒)

    Method and apparatus for controlling a mine roof support
    2.
    发明授权
    Method and apparatus for controlling a mine roof support 失效
    用于控制矿山屋顶支撑的方法和装置

    公开(公告)号：US4433945A

    公开(公告)日：1984-02-28

    申请号：US320712

    申请日：1981-11-12

    申请人： Hermann Irresberger

    发明人： Hermann Irresberger

    IPC分类号： E21D23/16

    CPC分类号： E21D23/16

    摘要： In combination with a mine roof support including a sole plate resting on the sole of a mine gallery, a roof shield engaging the roof of the mine gallery, and fluid-operated extensible and collapsible props extending between the sole plate and the roof shield for pressing the latter against the roof, a method for controlling the force at which the roof shield is pressed against the roof of the mine gallery comprising the steps of providing an overpressure valve communicating with the interior of each prop and adjusting the opening pressure of the valve in dependence on the inclination of the props with respect to the sole plate; and an arrangement for carrying out the method.

    摘要翻译： 结合包括搁置在矿场的鞋底上的底板的矿顶屋顶支撑件，接合矿井屋顶的屋顶防护罩以及在底板和屋顶罩之间延伸的流体操作的可伸缩和可折叠的道具用于压制 后者抵靠屋顶，一种用于控制屋顶护罩压靠矿井屋顶的力的方法，包括以下步骤：提供与每个支柱的内部连通的超压阀，并且调节阀的开启压力 依赖于道具相对于底板的倾斜度; 以及执行该方法的装置。