岩石氡析出的瞬态响应

摘要

This paper studies the transient response function of the radon escaping from rocks under the uniaxial pressure and provide a method for earthquake forecasting.Theoretical analysis results show that the radon concentration in the limited chamber increases exponentially.The growth rate depends on the radon decay constant and the rock axial displacement.The experimental data are acquired through a continuous radon measurement instrument.The transient curves acquired are in good agreement with that by the theoretical analysis.The relative error is <20%.%主要研究受压条件下岩石中氡析出量的瞬时响应函数，为地震氡预测提供理论支撑。首先通过数值分析，建立了封闭条件下岩体在不同单轴压力条件下非稳态的氡浓度随时间响应的数学描述，理论分析岩体单轴压力下析出氡浓度随时间呈指数增长。在理论研究基础上，设计了单轴压力下岩石氡析出的瞬态响应物理实验模型，应用自主研发的氡及其子体总量实时连续测氡仪，获得单轴压力条件下岩石析出氡的瞬态变化曲线。封闭空间岩体在单轴压力下氡浓度实验测量结果与理论曲线符合，实验值与理论计算结果之间的误差总体控制在20％之内。