- 责任者：Cui Shenghua (State Key Laboratory of Geohazard Prevention and Geoenvironment Protection ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Pei Xiangjun
- 刊名：Journal of Engineering Geology
- 出版年：2013
- 卷期：21(6)
- 关键词：危岩体 ; unstable rock
- 页码：p.912-919
- 图表：10 illus., 9 tables, 20 refs.
- 分类号：1702
- issnNo：ISSN1004-9665
- isbnNo：CN11-3249/P
The condition and gradient of the slope, the block shape and mass of the rock block are the major fac- tors affecting the movement characteristics of rock-fall. Through the orthogonal test design （ L27 （ 34 ） ） , the sort of them is obtained ： slope condition X1 , rock block shape X2, slope gradient X3, rock block mass X4. The velocity esti- mation values of rock-fall are calculated with the velocity equation v =-7.85X0.50 1＋0. 47X3.22 2＋2.97X0.24 3. This equa- tion is established by regression analysis. The values are compared with the measured values. The results show that the relative error is only 8.2% and the correlation coefficient is r=0. 92. Trend impact of regression equation analy- sis of the single factor shows that the slope condition has significantly negative linear correlation relationship with the speed of rock block. The mathematical relationship between the rock block shape and speed is sunken curve. The slope gradient and speed is convex curve. They are the same as the analysis of the empirical formula. Through rock- L fall field test and based on the measurement, a simplified modified velocity formula is v = v0 ＋L/2.45 vc, By compari-son, it is in good agreement with the measured results. It proves the applicability and validity of the formula given in this paper. The results can be used in estimating the speed and the impact energy of the rock-fall, and have a certain reference value in choosing prevention and control measures of rock-fall.