Numerical methods for study effect of parameters on rock behaviour have increased in recent decades. Simulation is an important tool for analysis which the possibility of doing it is not feasible under experimental conditions and the possibility of analysis of thermo-mechanical stress and strain caused by the laser. In this study, the finite element method has been used to study thermal and mechanical stresses caused by drilling with laser ND: YAG in rock samples of limestone and granite. For this purpose, the software ABAQUS was used for thermal and mechanical analyses. After applying drilling rate and modeling laser drilling based on experimental tests, the effect of type of saturation and high lateral pressures on the rock laser drilling was studied. Results showed that the numerical model used is in good agreement with the experimental data. The thermo-mechanical stress developed in the rock has a direct relationship with the drilling specific energy. Also, in the limestone and granite, the maximum stress caused by laser drilling in the water-saturated rocks is higher than the oil-saturated and dry state.

中文翻译：

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饱和类型和侧向压力对花岗岩和石灰岩中激光钻孔引起的热机械应力影响的数值模拟

近几十年来，用于研究参数对岩石行为影响的数值方法已经增加。模拟是一种重要的分析工具，在实验条件下进行模拟是不可能的，并且对于由激光引起的热机械应力和应变也无法进行模拟。在这项研究中，有限元方法已被用于研究由石灰石和花岗岩岩石样品中的激光ND：YAG钻孔引起的热应力和机械应力。为此，将ABAQUS软件用于热和机械分析。在采用钻孔速率并根据实验测试对激光钻孔进行建模之后，研究了饱和度类型和高侧向压力对岩石激光钻孔的影响。结果表明，所用数值模型与实验数据吻合良好。岩石中产生的热机械应力与钻井比能量有直接关系。另外，在石灰岩和花岗岩中，水饱和岩石中由激光钻孔引起的最大应力高于油饱和干燥状态。