水力发电2024，Vol.50Issue(1)：26-32,61,8.
水岩和冻融作用下岩石的脆性评价
Evaluation of Rock Brittle Characteristic under Water-rock Interaction and Freezing-thawing Conditions
摘要
Abstract
On the basis of summarizing current methods for evaluating rock brittleness and discussing the advantages and disadvantages of each method a new calculation method for the brittleness evaluation of rock is proposed by considering the stress-strain curve and energy evolution law of rocks.The proposed new brittleness evaluation method is verified by the triaxial test results of the red bed soft rock under water-rock action and natural condition and the sandstone under natural condition and freezing-thawing action.The results show that the new brittleness index decreases with the increase of confining pressure regardless of the natural state or water-rock interaction and the rock mass's brittleness under water-rock interaction is weaker than that under natural conditions with an average reduction of approximately 44%under various confining pressures.In addition the brittleness of rocks decreases with the increase of confining pressure under both natural and freezing-thawing conditions and the brittleness of sandstone under freezing-thawing is lower than that under natural conditions with an average reduction of approximately 13%under different confining pressures.关键词
岩石力学/脆性评价/水岩作用/冻融作用/岩石能量/全应力-应变曲线Key words
rock mechanics/brittleness evaluation/water-rock interaction/freezing-thawing/rock energy/full stress-strain curve分类
建筑与水利引用本文复制引用
高远,温韬,郭威,贾文君,黄德昕,胡明毅..水岩和冻融作用下岩石的脆性评价[J].水力发电,2024,50(1):26-32,61,8.基金项目
国家自然科学基金资助项目(42002268) （42002268）
西藏自治区科技项目(XZ202202YD0007C,XZ202301YD0034C) （XZ202202YD0007C,XZ202301YD0034C）
湖北巴东地质灾害国家野外科学观测研究站开放基金(BNORSG-202204) （BNORSG-202204）
