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一、顶板锚杆支护是一种主动支护的方式 目前,在煤矿井下巷道广泛使用金属支护,虽然对巷道壁起着支撑与保护等作用,但对围岩体几乎没有支护作用,被认为是一种被动的消极支护方式。在实际应用中,当直接顶发生破碎时,岩块逐步下落充满支架与岩体之间的空隙,压弯金属支架。金属支架的显著优点在于支承力是逐渐产生的,能充分地控制顶板。遗憾的是,其价格十分昂贵,运输和安装不便,且常需要大量的维护。
First, the roof bolt support is a way of active support Currently, extensive use of metal support in coal mine tunnels, although the tunnel wall plays a supporting and protecting role, but almost no support for the surrounding rock mass, Is considered a passive passive support. In practical application, when the direct top breaks, the rock blocks gradually fall and fill the gap between the support and the rock mass, and the metal support is pressed and bent. A significant advantage of the metal bracket is that the support forces are gradually generated, allowing full control of the roof. Unfortunately, they are very expensive, inconvenient to transport and install, and often require extensive maintenance.