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露天矿山边坡滚石严重威胁着下方工作人员和机械设备的安全.为有效治理高陡边坡的滚石,以南芬露天铁矿为例,建立滚石在边坡碰撞过程中速度和总动能的计算方程,利用Geoslope程序分析了共9个边坡剖面的稳定性,辨识出滚石高发区域.提出了在安全平台上反倾铺设碎石层对滚石进行消能的方法,利用Rockfall程序分别对5°,10°,15°,20°倾角的垫层情况下滚石运动轨迹和运动特征进行数值计算分析.结果表明:在安全平台上反倾铺设碎石层能够对滚石进行有效治理,随着倾斜垫层角度的增加,滚石治理效果增强,但效果相对增幅逐渐降低.故确定合理垫层倾斜角度,既可达到有效治理效果,又节约防护成本,可确保露天矿山的安全可持续开采.
Open-pit mine slope rock serious threat to the bottom of the staff and the safety of machinery and equipment.In order to effectively treat steep slopes of rock, Nanfen open-pit iron mine, for example, to establish the calculation of the speed and total kinetic energy of rolling stones in the process of slope collision Equation, the Geoslope program was used to analyze the stability of a total of 9 slope sections and to identify the areas with high incidence of rolling stones. A method of anti-tilting the gravel layer on the safety platform to dissipate the stones was proposed. Rockfall program was used to calculate the slope of 5 ° , 10 °, 15 ° and 20 ° inclination, the results show that anti-tilting gravel layer on the safety platform can effectively control the rolling stones, and as the tilting pad However, the relative increase of effect decreases gradually, so determining the reasonable inclination of cushion can not only achieve effective control effect but also save the cost of protection, which can ensure the safe and sustainable mining of open pit mine.