摘要
岩石崩滑引发的高速远程岩石碎屑流是一种危险性极大的地质灾害,碎屑流具有突发性,能够在很短的时间内达到很高速度,将岩石和碎屑物质运移至非常远的距离,破坏力极强,破坏范围极大。为了研究不同粒径岩石碎屑流的运移距离及堆积特性,进行室内5种不同粒径小尺度岩石碎屑材料的无侧限干粒子材料岩崩物理模型试验。试验结果表明:在相同试验条件下,碎屑颗粒尺寸对运动距离、等值摩擦因数影响较大,碎屑颗粒尺寸越大,运动距离越远,堆积长度越大,等值摩擦因数越小;5种不同碎屑颗粒尺寸的堆积形态基本相似,堆积宽度随颗粒尺寸的增大而逐渐增大;实测碎屑颗粒运动速度远大于理论计算值。
Rock avalanche rock debris caused by rock collapse is very dangerous geological disasters. The debris flow with a sudden can achieve high speed in a very short period of time,and the rocks and detrital material move to a very far distance,the damage and effect range are very great. In order to study the different sizes of rock avalanche flow distance of migration and accumulation characteristics,we have carried out the rock avalanche physical model test of small scale with five different particle sizes of rock detritus dry unconfined particle materials. Experimental results show that under the same test conditions,rock particle size influence on sliding distance and the equivalent friction coefficient is larger. The larger the rock particle size,the greater the sliding distance and pile length,the smaller the equivalent friction coefficient. Five different rock particle sizes are similar of the accumulation form and accumulation width increases along with the increase of particle size. The measured rock particle velocity is greater than the collapse theory calculated value.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2015年第S2期3652-3657,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(41272346)
水利部公益性行业科研专项经费项目资助(201301034)
郑州市创新型科技人才培育计划领军人才项目资助(10LJRC185)
关键词
工程地质
岩崩
碎屑流
堆积特性
等值摩擦因数
engineering geology
rock avalanche
rock debris flow
accumulation characteristics
equivalent friction coefficient
