Shear mechanical behavior and fracturing path of red sandstone treated by joninted effect of water-fractures
Yangyang Li1
Huicong Zhu2
Shichuan Zhang3
Bing Chen4
Buchu Zhang1
1.State Key Laboratory of Mining Disaster Prevention and Control Co-Founded,Shandong University of Science and Technology,Qingdao 266590,China;College of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao 266590,China2.State Key Laboratory of Mining Disaster Prevention and Control Co-Founded,Shandong University of Science and Technology,Qingdao 266590,China;College of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao 266590,China;School of Emergency Management and Safety Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China3.State Key Laboratory of Mining Disaster Prevention and Control Co-Founded,Shandong University of Science and Technology,Qingdao 266590,China;College of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao 266590,China;State Key Laboratory of Water Resource Protection and Utilization in Coal Mining,Beijing 102209,China4.School of Civil Engineering,Shandong University,Jinan 250100,China
摘要：Water content and primary fractures can change the mechanical characteristics of rock,making it easy to induce geological disasters.Therefore,direct shear tests of red sandstone under the action of water-fracture were carried out in this paper.The results show that shear strength of rock samples with fractures is less than that of intact rock samples.With the increase of primary fracture dip angle,shear strength and macroscopic crushing area of the rock sample increases first and then decreases with 20° as the boundary.It shows that the primary fractures weaken the shear mechanical properties and change the mac-roscopic failure mode.The shear performance of water-bearing rock samples is weaker than that of intact rock samples,and the weakening degree of water-saturated on shear performance of rock samples is lower than that of unsaturated water state.The fracture surfaces of rock samples are divided into'shortest path single through type','longest path single through type'and'cross path through type'.The failured rock samples are divided into'single through type'and'cross through type'.The research results can provide reference for geological disaster management under relevant conditions.
机标关键词：behaviorpatheffectfracturingjonintedmechanicalsandstoneshear
论文发表日期：2024-12-28
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：13( 16-28 )
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