天山阿拉沟泥石流运动机理分析

本文论述了天山阿拉沟地区泥石流运动的时空分布规律，分析了泥石流形成的沟谷环境特征，讨论了降雨对泥石流起动的激发作用。探讨了泥石流的运动机理，推导了泥石流起动的地表临界倾角范围，并从泥石流运动的物理机制上探讨了泥石流悬浮质的运动规律以及推移质的挟沙力关系。在此基础上，从力学的角度深入讨论了泥石流的运动速度及运动阻力，对其物理性态进行了机理性模拟，为泥石流的预测与防治提供科学的理论基础

ANALYSES OF MOTION MECHANISM FOR MUD ROCK FLOWS IN ALAGOU VALLEY OF TIANSHAN MOUNTAINS

This paper presents the distribution regularities of time and space for mud rock flow motion in Alagou region of Tianshan mountains,analyses the environmental features of valleies and gullies forming mud rock flows,and discusses the excitation function of rainfall for starting mud rock flows.Also,the author probes into the motion mechanism of mud rock flows,discusses critical dip angle range of ground,and seeks the motion law of suspended load as well as the relationships of carrying sand capability for bed load in mud rock flows from physical mechanism of mud rock flow motion.On the basis of above studies,the author analyses the motion velocity and resistance of mud rock flow motion,and imitates their physical properties and conditions.The principles and approaches mentioned above provide a theoretical foundation for prediction and prevention and control of mud rock flows.