冲击载荷下细砂岩压缩试验和破坏特性研究
发布时间：2018-08-06 19:24
【摘要】：深部矿井岩石经常受到地下水、冲击地压和高温等综合作用,因此深部矿井中岩石的力学特性需要考虑应变率、温度和含水率等诸多因素。原位采集800 m深部细砂岩;在万能材料试验机和分离式霍普金森压杆压缩试验装置上对不同应变率、温度和含水状态下的细砂岩试件进行压缩试验,用高速/超高速摄影记录岩石试件的应变场,获得不同试验条件下的应力-应变曲线;对典型的回收试件的断裂表面进行微观观测。结果表明,应变率、含水状态和环境温度对岩石的力学性质及破坏特性都有一定程度的影响。
[Abstract]:Deep mine rock is often subjected to underground water, rock burst and high temperature. So the mechanical properties of rock in deep mine need to consider the strain rate, temperature and water content. 800 m deep fine sandstone is collected in situ, and the different strain on the universal material test machine and the separation type Hopkinson compression test device The compression test of fine sandstone under the condition of rate, temperature and water bearing state is carried out, the strain field of rock specimen is recorded by high speed / ultra high speed photography, the stress strain curve under different test conditions is obtained, and the fracture surface of the typical recycled specimen is observed microscopically. The results show that the strain rate, the water bearing state and the ambient temperature on the rock mechanics Both properties and destructive properties have a certain degree of influence.
【作者单位】： 宁波大学科学与技术学院;宁波大学力学与材料科学研究中心;河南理工大学土木工程学院;
【基金】：国家自然科学基金项目(11502074、11372149) “力学”浙江省重中之重学科开放基金项目(xklx1510)
【分类号】：TU45
，
本文编号：2168745
[Abstract]:Deep mine rock is often subjected to underground water, rock burst and high temperature. So the mechanical properties of rock in deep mine need to consider the strain rate, temperature and water content. 800 m deep fine sandstone is collected in situ, and the different strain on the universal material test machine and the separation type Hopkinson compression test device The compression test of fine sandstone under the condition of rate, temperature and water bearing state is carried out, the strain field of rock specimen is recorded by high speed / ultra high speed photography, the stress strain curve under different test conditions is obtained, and the fracture surface of the typical recycled specimen is observed microscopically. The results show that the strain rate, the water bearing state and the ambient temperature on the rock mechanics Both properties and destructive properties have a certain degree of influence.
【作者单位】： 宁波大学科学与技术学院;宁波大学力学与材料科学研究中心;河南理工大学土木工程学院;
【基金】：国家自然科学基金项目(11502074、11372149) “力学”浙江省重中之重学科开放基金项目(xklx1510)
【分类号】：TU45
，
本文编号：2168745
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