对岩体完整性指数计算中岩块波速的几点思考

对岩体完整性指数计算公式中的岩块压缩波速的测试和代表值进行探讨后认为:岩体完整性指数计算的岩体和岩块应针对同岩性的同岩组单元;工程中必须通过数理统计方法寻找岩块波速的代表值才有实际工程意义,把岩块波速最大值当成新鲜完整岩石的压缩波速值是不合理的;选取算术平均值、最大平均值、最小平均值、众值、中值及标准值之一作为岩块波速代表值时,应根据测试数据的频率分布特征进行具体分析才更加合理可靠。

Considerations of the Wave Velocity in the Integrity Index Calculations in Rock Samples

After a discussion on the measurement of the compressive wave velocity in the formula of the rock mass integrity index as well as the representative wave velocity values,it is concluded that the rock mass integrity index estimation should be focused on the same type of rock mass with similar properties.The representative wave velocity in the rock mass in the engineering practice should be obtained by the statistical methods.It is unreasonable to use the maximum compressive wave velocity measured as the wave velocity in the intact and fresh rock sample.Once the mean value,maximum average value,minimum average value,median value and the standard deviation value are determined,the reliable compressive wave velocity value should be analyzed by its frequency distribution.