防治排土场滑坡诱发泥石流的措施研究

Study on Control Measures of Landslide-induced Dump Mud-Rock Flow

排土场滑坡与泥石流是一种常见的地质灾害,实测表明宜昌石灰石矿排土场在排弃废石土荷载的作用下产生剧烈变形和破坏,在雨季有可能诱发泥石流灾害,为此在下游山谷处设置格栅坝,预防发生泥石流。以诱发泥石流后相关淤积量等参数的计算为基础,通过对坝体选型,坝高确定,坝基优化等过程的研究和探索,并结合环境工程地质条件,设计出比较合理的方案,通过现场实施,可以有效地预防泥石流灾害的发生,达到了比较理想的效果。

Dump landslides and mud - rock flow is a common geologic hazard. Investigation indicated that serious deformation and damage has occurred in the dump of Yichang Limestone Mine under the load of abandoned waste rock and soil, mud - rock flow disaster will be possible to happen in the rainy season, so a horizontal grilled dam was set up in the downstream valley to prevent mud - rock flow. Some parameters such as the amount of sediment deposition caused by mud - rock flow were calculated, on this basis, the type selection of dam body, the determination of dam height and the optimization of dam foundation were made, combined with the conditions for environmental engineering geology, a more reasonable plan to control landslide -induced dump mud - rock flow was designed. More satisfactory result has been achieved by on - site implementation of the plan, which can effectively prevent the occurrence of mud - rock flow disaster.