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天然气水合物主要以胶结物形式存在深海能源土颗粒之间,对能源土强度影响显著,因此研究水合物胶结接触力学特性对能源土力学性质研究有重要作用,而其中的关键是水合物胶结模型及胶结参数的确定。首先,引入并讨论了一种微观胶结接触模型及其对于能源土胶结接触力学特性的适用性;其次,通过文献资料系统分析,获取不同温度、压力及水合物密度条件下天然气水合物的强度与弹性模量表达式;最后,进一步研究了水合物微观胶结模型中的胶结参数,该类水合物微观胶结参数取决于能源土中水合物埋藏深度(赋存环境压力)、温度、水合物密度,这些宏观参量容易确定。
Natural gas hydrate mainly exists as cements between deep-sea energy soil particles and has a significant impact on energy soil strength. Therefore, it is important to study the mechanical properties of hydrate cemented contact on the study of mechanical properties of energy geology. The key point is the hydrate cementation model And the determination of cementation parameters. First of all, a micro-cemented contact model and its applicability to the contact mechanics of energy-soil cements are introduced and discussed. Secondly, the strength of gas hydrate under different temperature, pressure and hydrate density conditions Finally, we further study the cementation parameters in the hydration micro-cementation model. The micro-cementation parameters of these hydrates depend on the buried depth of hydrate in the energy source soil (ambient pressure), temperature, hydrate density, These macro parameters are easy to determine.