多场耦合深部软岩固流转化理论及能耗规律的研究

The environment fields (including stress, seepage, temperature and physicochemical and etc) in deep soft rocks are dynamic, balanced and intercoupling. The geometrical relationship, physical relationship and equilibrium relationship are complicated. So it's difficult to deduce deformation theories caused by multi-factors. .Field monitoring, rheology experiment in indoor lab,and theory derivation will be done in this project, and the mechanisms, laws and coupled relationships appeared in the process of changing between solid and liqud of deep soft rocks under one or more fields including stress, seepage, temperature and physicochemical and etc will be studied. The mechanical essences and rheology features of deformation and failure of supporting under multi-field will be revealed. Further more, Multi-field coupling rheological models will be built, and these models can fully describe the intense rheology and large deformation under the occurrence state of deep soft rocks. Moreover, the law of energy consumption on changing between solid and liqud is searched. And the relationship between macroscopic deformation response with mesoscopic failure evolution is researched.And the measures for confirming supporting load in the deep soft rocks engineering are provided. Besides, in order to supply and complete the mechanics theory of deep soft rocks, control technology of rheology rate in the deep soft rocks is researched, and the changes of mechanics behaviour are forecasted under the effect of multi-field in the soft rock roadway. All the above can provide theoretical direction for solving key problems in the deep soft rocks engineering. So there is great theoretical and applied value.

深部软岩体中动态平衡的环境场（应力场、渗流场、温度场和化学场等）相互耦合，几何关系、物理关系、平衡关系复杂，多因素变形理论推导困难。 .项目通过现场监测、实验室流变实验和理论推导，研究应力场、温度场、渗流场、化学场等多场在深部软岩固流转化过程中的单因素和多因素影响机理、影响规律和耦合作用关系；揭示软岩体在多场耦合环境下流变特性和支护变形破坏的力学本质；建立能完整描述深部软岩赋存状态下强流变、大变形多场耦合流变模型；探索深部软岩固流转化能耗规律，研究软岩宏观变形响应与损伤细观演化关系；给出深部软岩工程支护载荷的确定方法；研究深部软岩流变速率的控制技术，预测软岩巷道在多场耦合作用下的力学行为变化，补充和完善深部软岩体固流转化理论。为解决深部软岩工程中的关键科技问题提供理论指导，有重大的理论和应用价值。

以相似三定理为理论依据，推导出包含温度、渗流影响的适合岩石流变模型试验相似理论体系；开创了一种采用合适配比的石蜡、石膏、河砂、铁粉材料来模拟软岩在高温高压作用下固流转化特性的新型相似材料，验证了其作为软岩相似材料的可行性，并制作相似模型，将试验结果和数值模拟结果进行相互验证，从而得到相似试验的规律性；研究了应力场、温度场、渗流场等多场在深部软岩固流转化过程中的单因素和多因素影响机理、影响规律和耦合作用关系，分析了多场耦合软岩巷道蠕变规律、复杂环境下蠕变特性等；揭示了软岩体在多场耦合环境下流变特性和支护变形破坏的力学本质。.以含软弱夹层人工复合岩体为研究对象展开单轴、三轴压缩和蠕变实验，对其强度、蠕变特性和破坏模式进行研究，并与弹性力学的解析结果形成验证和对照，结合数值模拟论证了其工程适用性，并发表了相关学术论文；对相似软岩材料进行一系列的损伤耗能及考虑温度条件下的创新实验，并应用有限元分析加以验证，探索深部软岩固流转化能耗规律；结合工程实际，利用可实现多物理场直接耦合的仿真分析软件，模拟深部软岩在地下温度场、应力场等环境下的力学特性及蠕变特性，对矿区巷道及相关地下工程建设有重要的指导意义，对深部能源开发、开采有重要的参考价值。 .该项目按计划进展顺利，并已取得良好的成果。各具体研究成果发表学术论文23篇和50项相关的国家专利，包括应用力学学报等重要期刊和重要国际会议论文；课题组负责人及相关成员多次应国内外会议或大学邀请作学术报告，收到良好效果。