倾斜碎石垫层对滚石防治理论的研究
发布时间：2018-12-14 04:26
【摘要】：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.
[Abstract]:The slope rolling rock of open pit mine seriously threatens the safety of workers and mechanical equipment below. In order to effectively control the rolling stones of high and steep slopes, taking Nanfen opencast iron mine as an example, the calculation equations of velocity and total kinetic energy of rolling stones in the process of slope collision are established. The stability of nine slope sections is analyzed by Geoslope program, and the high incidence area of rolling stones is identified. In this paper, a method of energy dissipation of rolling stones is put forward by laying gravel layer on the safe platform. The movement track and motion characteristics of rolling stones are calculated and analyzed by Rockfall program under the condition of 5 掳, 10 掳, 15 掳and 20 掳inclination respectively. The results show that the rolling stone can be effectively treated by the reverse dumping gravel layer on the safe platform. With the increase of the angle of the inclined cushion, the treatment effect of the rolling stone increases, but the relative increase of the effect decreases gradually. Therefore, to determine the reasonable angle of cushion tilt can not only achieve effective treatment effect, but also save the cost of protection, and ensure the safe and sustainable mining of open pit mine.
【作者单位】： 吉林大学建设工程学院;深部岩土力学与地下工程国家重点实验室;中国矿业大学(北京)力学与建筑工程学院;本溪钢铁集团南芬露天铁矿;
【基金】：国家自然科学基金项目(41502323) 北京自然科学基金项目(8142032)
【分类号】：TD854.6
本文编号：2377917
[Abstract]:The slope rolling rock of open pit mine seriously threatens the safety of workers and mechanical equipment below. In order to effectively control the rolling stones of high and steep slopes, taking Nanfen opencast iron mine as an example, the calculation equations of velocity and total kinetic energy of rolling stones in the process of slope collision are established. The stability of nine slope sections is analyzed by Geoslope program, and the high incidence area of rolling stones is identified. In this paper, a method of energy dissipation of rolling stones is put forward by laying gravel layer on the safe platform. The movement track and motion characteristics of rolling stones are calculated and analyzed by Rockfall program under the condition of 5 掳, 10 掳, 15 掳and 20 掳inclination respectively. The results show that the rolling stone can be effectively treated by the reverse dumping gravel layer on the safe platform. With the increase of the angle of the inclined cushion, the treatment effect of the rolling stone increases, but the relative increase of the effect decreases gradually. Therefore, to determine the reasonable angle of cushion tilt can not only achieve effective treatment effect, but also save the cost of protection, and ensure the safe and sustainable mining of open pit mine.
【作者单位】： 吉林大学建设工程学院;深部岩土力学与地下工程国家重点实验室;中国矿业大学(北京)力学与建筑工程学院;本溪钢铁集团南芬露天铁矿;
【基金】：国家自然科学基金项目(41502323) 北京自然科学基金项目(8142032)
【分类号】：TD854.6
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