不同赋存深度岩石力学行为差异及本构模型研究

Mechanical Behavior Differences and Constitutive Model of Rock at Different Depths

深部资源开采和深地空间利用已成为常态,深部工程开发将是我国未来重要发展领域。符合深部特征的岩石力学行为及基础理论研究是保障深部工程安全高效开发的核心关键。总结了近年来在不同赋存深度岩石力学行为及本构模型方面的研究进展:依托千米级深部煤炭综合开采基地—平煤矿区(1100m)和世界上埋深最深的锦屏地下实验室(2400m),以赋存深度为研究主线,初步研发了考虑深部赋存环境和工程扰动特征的岩石力学测试技术,揭示了不同赋存深度岩石的动静力学行为差异,构建了考虑赋存深度影响的岩石本构关系和能量灾变分析模型,并在平煤矿区和锦屏地下实验室等深部工程实践中实现了初步应用,成果对于促进深部资源和深地空间的高效安全开发具有重要意义。

Deep resource mining and deep underground space utilization have become normal,and deep engineering development will be an important development field in China in the future.The research on mechanical behavior and basic theory of rock in accordance with deep characteristics is the key factor to ensure the safe and efficient development of deep engineering.This work summarized our research progresses of mechanical behaviors and constitutive models of rock at different depths in recent years:relying on the kilometer-level deep coal comprehensive mining base,i.e.,Pingdingshan Coal Mining Area(1100 m),and the world’s deepest China Jinping Underground Laboratory(2400 m),taking the depth as the main research line,the rock mechanical testing technologies considering the characteristics of deep occurrence environment and engineering disturbance were preliminarily developed,the differences in dynamic and static mechanical behaviors of rocks at different depths were revealed,the constitutive relation and catastrophe analysis model based on energy of rock considering the influence of depth were established,and the preliminary applications were realized in the deep engineering practices of Pingdingshan Coal Mine Area and China Jinping Underground Laboratory.Those results are of great significance to promote the efficient and safe development of deep resources and deep underground space.