CAJ | 학술논문

基于流体动力学与弹性力学基本理论，分析水射流冲击岩石过程中产生的水锤压力与滞止压力，推导不同压力阶段水射流截面上动压力径向分布函数，建立水射流以不同的夹角α冲击横观各向同性岩石的数学模型，选取α=0°，45°，90°研究冲击夹角对岩石破碎规律的影响；选择具有良好横观各向同性的砂岩开展不同夹角的冲击实验。理论分析与实验研究表明：水锤压力导致横观各向同性岩石产生冲击破碎坑，滞止压力诱发岩石内部裂纹的产生与扩展；水射流以垂直于、倾斜于、平行于层理冲击横观各向同性岩石导致其分别产生横向裂纹、倾斜裂纹和劈裂裂纹。
기우류체동역학여탄성역학기본이론，분석수사류충격암석과정중산생적수추압력여체지압력，추도불동압력계단수사류절면상동압력경향분포함수，건립수사류이불동적협각α충격횡관각향동성암석적수학모형，선취α=0°，45°，90°연구충격협각대암석파쇄규률적영향；선택구유량호횡관각향동성적사암개전불동협각적충격실험。이론분석여실험연구표명：수추압력도치횡관각향동성암석산생충격파쇄갱，체지압력유발암석내부렬문적산생여확전；수사류이수직우、경사우、평행우층리충격횡관각향동성암석도치기분별산생횡향렬문、경사렬문화벽렬렬문。
The water hammer pressure and stagnation pressure during the impacting process of water-jets were analyzed based on the theories of hydrodynamics and elasticity. Radial distribution functions for the dynamic pressure in the cross-sections of water-jets during different pressure stages were derived. Numerical models for the transverse isotropic rocks under water jet impacting at different angles were developed and the influence of impact angle on the breaking of rocks was studied assumingα=0°,45°,90°. A number of impacting experiments on the transverse isotropic sand-stones were conducted at different impacting angles. The numerical analysis and the experiments reveal that the water hammer pressure produced broken pits on the transverse isotropic rocks and the stagnation pressure caused the initiation and development of cracks inside the rocks. The transverse cracks, inclined cracks and splitting cracks appeared accordingly when the water-jets impacting were perpendicular, inclined and parallel to the beddings of the transverse isotropic rocks.