岩爆机理及其定量预测模型

The foundation will carry out research on the scientific problem that rockburst will likely occur in deep continuum surrounding rocks and deep crack-weakened rock masses.The mechanism of rockburst for deep continuum surrounding rocks and deep crack-weakened rock masses will be revealed. The dissipated energy for nucleation of pre-existing cracks,stable and unstable growth of secondary microcracks subjected to dynamic loads will be determined. The elastic strain energy stored in deep rock masses will be investigated.In terms of the conditions that the total dissipated energy should be smaller than the elastic strain energy stored in deep rock masses,secondary microcracks coalesce and macrocracks occur,criteria of rock burst of deep continuum surrounding rocks and deep crack-weakened rock masses will be proposed. The quantitative prediction model of rockburst for deep continuum surrounding rocks and deep crack-weakened rock masses will be established. The multiscale numerical simulation program of rockburst for deep rock masses will be compiled. The site, magnitude and rank of rockburst will be defined. The research results will provide scientific basis for quantitative prediction and prevention of rockburst for deep rock masses.

本项目紧密围绕深部连续围岩和裂隙岩体可能发生岩爆这个关键科学问题开展研究，揭示深部连续围岩和裂隙岩体岩爆发生的机理，确定动荷载作用下原生裂纹(隙)启裂、次生裂纹稳定和失稳扩展的耗散能，获得深部岩体储存的弹性应变能，利用原生裂纹(隙)启裂和次生裂纹扩展消耗的能量小于深部岩体储存的弹性应变能条件与次生裂纹连接和汇合条件，提出深部连续围岩和裂隙岩体发生岩爆的判据，建立深部连续围岩和裂隙岩体岩爆定量预测模型，编制模拟深部岩体岩爆的多尺度数值计算程序，确定岩爆发生位置、规模和等级。该项目的研究成果将为目前急需的深部岩体岩爆定量预测和防治提供科学依据。

本项目紧密围绕深部连续围岩和裂隙岩体可能发生岩爆这个关键科学问题开展研究，揭示l了深部连续围岩和裂隙岩体岩爆发生的机理，确定了动荷载作用下原生裂纹(隙)启裂、次生裂纹稳定和失稳扩展的耗散能，获得了深部岩体储存的弹性应变能，利用原生裂纹(隙)启裂和次生裂纹扩展消耗的能量小于深部岩体储存的弹性应变能条件与次生裂纹连接和汇合条件，提出了深部连续围岩和裂隙岩体发生岩爆的判据，建立了深部连续围岩和裂隙岩体岩爆定量预测模型，编制模拟深部岩体岩爆的广义粒子动力学数值计算程序，确定岩爆发生位置、规模和等级，成功应用于锦屏二级水电站施工引水洞的岩爆预测。该项目的研究成果将为目前急需的深部岩体岩爆定量预测和防治提供了科学依据。