前言过去几年,美国矿业局进行了一项研究工作以研制出可供选用的能够提高矿山生产能力、减少运输费用、改善矿物的利用和节省能量的矿山运输系统。其中所遵循的一个基本目标就是研制出一种破碎设备,使之把爆破的原岩破碎到运输机所需要的可靠而经济的块度。 1980年,就矿山对该设备的要求和满足这些要求的现有技术能力进行了审议。1981 Preface Over the past few years, the United States Department of Mines conducted a research project to develop mine transport systems that are available for selection to increase mine production capacity, reduce transportation costs, improve mineral utilization and save energy. One of the basic goals followed was to develop a crushing plant that allowed the blasting of the original rock to be broken down to a reliable and economical block required by the transporter. In 1980, the mine’s requirements for the equipment and the existing technical capabilities to meet those requirements were reviewed. 1981