Development of an advanced rock support technology for rockburst-prone mines

随着采矿向深部推进，采矿引起的岩石破坏、地震活动和冲击地压问题显著增加。作为一道重要的防线，地面控制措施和防爆围岩支护被用来防止或最大限度地减少对开挖的破坏，提高工作场所的安全。现有的围岩支护技术采用双通道系统，即在掘进巷道时，在第一通道安装钢筋网状或喷射混凝土形式的标准支架。稍后，机组人员将在第二次传递中安装防爆屈服支架。这种双通道系统显著减缓了漂移的发展。此外，由于人工成本是地面支撑中成本最高的项目，因此需要额外打孔，因此岩石支护成本较高。

As mining progresses to deep grounds, mining-induced rock failure, seismicity and rockburst problems increase significantly. As an important line of defense, ground control measures and burst-resistant rock support are used to prevent or minimize damage to excavations and enhance workplace safety. Existing rock support technologies use a two-pass system, i.e., standard support in the form of rebar with mesh or shotcrete is installed in the first pass when the drift is excavated. At a later time, the crew will install the burst-resistant yielding support in the second pass. This two-pass system slows down drift development significantly. In addition, the cost of rock support is high because extra boreholes need to be drilled as labor cost constitutes the highest cost item in ground support.