前言国际岩石力学学会试验方法委员会,即以前的实验室与现场试验标准委员会,成立于1967年。其主要任务是起草岩石试验的“建议方法”。目的在不妨碍技术发展和改进的情况下制定若干测量标准。点荷载强度试验是这个委员会最早颁布(1972)的建议方法之一,也是第一批修订的之一。象苏联的普洛托基耶卡诺夫(Protodyakanov)和英国的霍布斯(Hobbs),法兰克林(Franklin)等的“简接拉伸试验”都是点荷载强度试验最早的成果,而将此项试验作为岩石强度指标试验第一次描述成现在的形式。则是勃罗契(Broch)和法兰克林(见文献录目)。本试验早期的历史可以在近来发表的文献中查到。在所附的文献目录中,使我们了解到这项试验更详细的研究成果。例如,现在的比 Preface The International Rock Mechanics Society Test Methods Committee, the former Laboratory and Field Test Standards Committee, was established in 1967. Its main task is to draft “recommended methods” for rock tests. The purpose is to formulate a number of measurement standards without impeding technological development and improvement. The point load strength test was one of the first proposed methods of this Committee (1972) and one of the first revisions. Like the Soviet Union’s Protodyakanov and the British Hobbs, Franklin et al.’s “Simple Tensile Test” are the earliest results of point load strength tests. This experiment was first described as the current form as a rock strength index test. It is Broch and Franklin (see Bibliography). The early history of this experiment can be found in the recently published literature. In the attached bibliography, we learned more about the results of this experiment. For example, the current ratio