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Jennmar Corporation

机译：珍玛公司

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摘要

Despite increasing support density in the roof of a development section, a mine in the Pittsburgh #8 seam could not contain lateral rock movement in the immediate roof. A new cable bolt, designed by Jennmar was introduced as primary support. The cable bolt replaced the roof bolt system the mine had in place along with an extensive roof support pattern, The move to the new bolts has also cut development costs and significantly improved productivity, A longwall mine in the Pittsburgh #8 seam began experiencing significant horizontal stress induced lateral shift in the immediate roof of its sub-mains development. This mine has been a long time user of Jennmar support systems.
机译：尽管开发段的顶棚中的支撑密度增加，但匹兹堡8号煤层中的一个矿井无法在紧邻的顶棚中进行横向岩石运动。引入了由Jennmar设计的新电缆螺栓作为主要支撑。电缆螺栓取代了矿山已有的屋顶螺栓系统以及广泛的屋顶支撑模式。向新螺栓的迁移也降低了开发成本并显着提高了生产率，匹兹堡8号煤层中的长壁矿山开始经历明显的水平应力在其次干线发展的直接屋顶中引起横向移动。该矿山是Jennmar支持系统的长期用户。

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