基于地应力现场实测与开采扰动能量积聚理论的岩爆预测研究

高地应力诱发的岩爆灾害是目前深部地下工程经常遇到的工程地质问题。现场地应力测量是岩爆预测的重要前提，根据三山岛金矿深部测量和岩体赋存状况的特点，优化应力解除测量技术并在矿区深部进行现场实测。提出采场岩爆发生的2个必要条件，即岩石具备储备高应变能的特性和采场具备高应变能积聚的应力环境。基于地应力实测与岩石力学室内试验结果，采用多准则判据对矿区深部发生岩爆的倾向性做出定性分析与评价。FLAC3D数值模拟分析揭示深部开采引起的采场围岩能量积聚、分布状况及变化规律。首次采用地震学的知识，对三山岛金矿未来深部开采过程中可能诱发岩爆的地点和级别做出预测。研究成果为深部地下工程岩爆的预测、预报提供新的思路和途径。

STUDY OF ROCKBURST PREDICTION BASED ON IN-SITU STRESS MEASUREMENT AND THEORY OF ENERGY ACCUMULATION CAUSED BY MINING DISTURBANCE

Rockburst is a common engineering-geological problem in deep underground engineering. In-situ stress measurement is an important premise for prediction of rockburst. According to the requirement of deep measurement and burying condition of rockmass in Sanshandao gold mine，overcoring technique is improved and in-situ measurement is carried out in deep mining area. Rock with capacity of storing strong strain energy and stress environment to cause high energy accumulation，as two necessary conditions for rockburst，are proposed. Based on the results of in-situ stress measurement and rock mechanical test，qualitative analysis of rockburst prediction is accomplished using the multiple criteria. The distribution and variation law of rockmass energy accumulation caused by deep mining are revealed by FLAC3D simulation. With the help of seismology method，location and intensity of rockburst during future mining process in Sanshandao gold mine are predicted. The study results provide a new approach for rockburst prediction in deep underground engineering.