考虑时间和深度效应的岩体强度影响因素分析

Influencing Factors Analysis on Rock Mass Strength Considering Time and Depth Effect

基于岩石风化的深度效应和时间效应,根据岩体风化特点和考虑深度效应的岩体风化Boltzmann曲线模型的基础上,引入表层岩石风化的时间效应,提出考虑时间、深度效应的岩体风化模型,并对影响岩体强度分布的因素展开了分析,研究表明:最大影响深度h_m与形状函数系数b、表层岩体强度S_0和强度分布影响区域中心点对应的深度H_0成正比例关系,与岩石风化影响下限强度值S_H成反比例关系。最后统计分析了不同因素在不同位置对岩体强度参数的影响程度,确定了浅层岩石风化的时间效应为影响岩石强度分布的主要因素,进而说明以此引入时间因子是可行的,为进一步认识岩体强度在时间和空间上的分布情况提供了一定依据。

Based on depth effect and time effect of rock weathering and according to the characteristics of rock weathering and the Boltzmann curve model of rock weathering which considered the effect of depth,a rock weathering model considering time effect and depth effect was proposed. Factors affecting the rock mass strength distribution were analyzed. Results show that the maximum influence depth hmis positive proportion to shape function coefficientb.Strength of surface rock mass S0 is positive proportion to center point depth H0 of intensity distribution impact area,and it inversely related to lower bound strength value SHof rock weathering effect. In the end,influence of different factors on the rock strength parameters in different locations is statistically analyzed,determining that the main factor affecting the distribution of rock strength is the time effect of shallow rock weathering,and it is feasible to introduce the time factor,which provides a certain evidence to further understand rock mass strength distribution in time and space.