关键词: 岩石可钻性, TBM, 掘进效率预测模型, 测试方法

Abstract: Drillability of rock is an important index to evaluate the difficulty degree of TBM tunnel construction, and its test techniques must match the design and construction process of TBM. The drillability test and evaluation techniques of rock have been still mainly dominated by foreign technology owing to the relatively later development of construction technology of domestic TBM. In this paper, the drillability index tests and evaluation technologies of rock are introduced in detail from three aspects of rock hardness, brittleness and abrasion based on the need of the commonly used tunneling efficiency prediction models. The test results of these techniques can provide basic data for the cutter head design of shield machine as well as the prediction of cutter wear and excavation velocity of TBM in China, and also we suggest to establish a drillability evaluation laboratory and corresponding database in China as soon as possible.

Key words: rock drillability, TBM, prediction model of tunneling efficiency, test method