1. 成都理工大学地质灾害防治与地质环境保护国家重点实验室，四川 成都 610059
• 收稿日期:2008-04-12 修回日期:2008-04-17 出版日期:2008-05-10
• 通讯作者: 黄润秋 E-mail:hrq@cdut.edu.cn
• 基金资助:

国家自然科学基金雅砻江水电开发联合研究基金重点项目“雅砻江流域高边坡发育的动力过程及其工程适宜性评价”（编号：50539050）资助.

### Study on the Movement Charateristics of Rolling Rock Blocks on Platform

Huang Runqiu，Liu Weihua

1. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059,China

Platform has a good function to baffle potential unstable rock masses movement after their falling.. In this paper, using the kinematics and mechanics theoretical theories, the velocity calculation formula of collision process between rolling rock and platform were put forward, and the horizontal movement calculation method of rolling rock moving on platform was studied. Furthermore, the rolling friction coefficient was researched on the basis of the test and the shape analysis of rolling rock. The test result showed that, the rolling rock moving velocity after collided with platform was ascertained by the normal restitution coefficient, tangential restitution coefficient and the rolling rock moving velocity before collided. The horizontal displacements of the rolling rock on platform have three parts: the horizontal span displacement above the platform before collision, the horizontal displacement between two collisions with the platform, and the rolling displacement after final collision. The displacement value can be ensured with kinematics analysis. The normal restitution coefficient, tangential restitution coefficient and the rolling friction coefficient are the important parameters to calculate the horizontal displacement of the rolling rock movement on platform. The rolling friction coefficient value between rolling rock and platform with rock blocks and detritus surface is between 0.19 and 1.05, and the value is reduced in turn according to rolling rock shape of rectangle, square, spherical and slices shape. The relationship of the rolling friction coefficient between the rolling rock shape and the platform with rock blocks and detritus surface is a good linear relation. The rolling friction coefficient of others shape rolling rock can be confirmed by interpolation method or regression formula. Then the new feasible methods to prevent potential unstable rock masses are put forward. The results help us make out a draft of geohazards prevention.

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