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研究了大庆徐家围子地区火山岩地层的岩石力学性质及本构关系,根据现场声波测井资料及岩心资料,通过室内实验及回归分析建立了声波测井资料与火山岩岩石力学特性预测模型,并根据损伤力学的相关理论,推导出火山岩弹塑性损伤本构关系式.实验结果表明,该研究区域火山岩可钻性值相对较高,硬度较大,塑性系数较低,泊松比较低,表现出明显的脆性和弹性特征;火山岩弹塑性损伤本构关系式符合火山岩实际变化规律.
The rock mechanics properties and constitutive relations of volcanic stratum in Xujiaweizi area of Daqing are studied. According to the acoustic logging data and core data of the site, the acoustic logging data and the predicting model of volcanic rock mechanical properties are established by laboratory experiments and regression analysis. According to Damage mechanics, the constitutive relation of the elastic-plastic damage of volcanic rock is deduced.The experimental results show that the drillability of volcanic rocks in this study area is relatively high, the hardness is higher, the plastic coefficient is lower and the Poisson’s ratio is lower, which shows obvious The brittleness and elastic characteristics of the volcanic rock; the elastoplastic damage constitutive relation of volcanic rock accords with the actual variation law of volcanic rock.