Abstract
Many factors affect the movement of rockfall. Thus, this study explored the influence of rockfall shape, slope angle, angular velocity, slope hardness, rockfall mass, and slope surface roughness on the stopping position and potential energy loss rate based on an orthogonal experiment. To study the key factors affecting the movement of rockfall, 2500 sets of orthogonal tests were carried out by using ROCFALL 8.0 (ROCSCIENCE) numerical simulation program. SPSS19.0 software was used to perform importance analysis and correlation analysis on the test results. The analysis results show that rockfall shape has the greatest influence on the stopping distance. There is a significant positive linear correlation between the number of rockfall edges and the stopping distance of rockfall on the asphalt road. The slope angle has the greatest influence on the potential energy loss rate, and there is a significant negative linear correlation between the slope angle and the potential energy loss rate. In the case of a low angle slope, the stopping position of rockfall is more concentrated. Therefore, in the process of mountain engineering construction, more attention should be paid to the influence of rockfall shape and slope angle on rockfall hazard protection.
Highlights
Unstable rock mass will collapse under the influence of gravitational force, mechanical weathering, and the presence of interstitial water forming the rockfall hazard [1]
The influence of the rockfall shape and size on the bounce height can be studied by ROCFALL numerical simulation program, which shows the spherical rocks with irregular shape has high kinetic energy and bouncing ability [11]
This study uses an orthogonal experiment to explore the influence of rock shape, slope angle, angular velocity, slope surface hardness, rockfall mass, and slope surface roughness on the stopping distance and potential energy loss rate, obtains the critical factors that affect the rockfall motion
Summary
Unstable rock mass will collapse under the influence of gravitational force, mechanical weathering, and the presence of interstitial water forming the rockfall hazard [1]. The influence of the rockfall shape and size on the bounce height can be studied by ROCFALL numerical simulation program, which shows the spherical rocks with irregular shape has high kinetic energy and bouncing ability [11]. To study the area where the rolling rock stop and the causes of energy loss during the movement of rockfall, and provide engineering technical support for the prevention and control of rockfall hazard in mountainous highway areas. This study uses an orthogonal experiment to explore the influence of rock shape, slope angle, angular velocity, slope surface hardness, rockfall mass, and slope surface roughness on the stopping distance and potential energy loss rate, obtains the critical factors that affect the rockfall motion. The law of the stopping position of rockfall is drawn, and the law that affects the energy loss of the rolling rock is summarized
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