摘要
由于露天矿开采量的增大和土地资源的紧缺,迫使企业在老排土场上进行增高扩容,由此引起的安全问题日益突出。以齐大山铁矿某排土场为例,分析验算该排土场增高扩容方案的可行性。通过室内实验取得的边坡散体力学参数,根据工程地质勘察成果建立排土场边坡模型,利用极限平衡法计算排土场分别坐落于基岩、黏土层之上,边坡体内无地下水,低水位、高水位情况下的边坡安全系数,获得了地下水对于排土场边坡安全的影响规律;尤其是当排土场坐落于黏土层之上时,边坡安全系数随着地下水位的不断升高而迅速降低,严重影响边坡安全。由排土场180~230 m不同高度的边坡稳定性分析可知,在180~220 m,排土场安全稳定性系数由1.122降到1.116;而在230 m,安全系数则增长到1.142。所获边坡稳定性随地下水位和边坡高度的变化规律为边坡安全性评价及整治方案确定提供了有力依据。
Due to the increase of open-pit exploration and shortage of land resources,the firms have to increase capacity in old dumps,that induced the security problem increasingly prominent. Taking a waste dump of Qidashan Iron Mine as a case,the feasibility for the capacity increase and heightening of the dump was analyzed. With the use of mechanical parameters obtained from the indoor experiments,slope model of waste dump was established based on the engineering geological investigation. The limit equilibrium method was adopted to calculate the slope safety factor of a dump without ground water or under low water,high water level in Qidashan Iron Mine,which is located on bedrock or clay layer,and obtain the influencing law of groundwater on mine slope safety. Especially when the dump is located in the clay layer,the slope safety factor falls rapidly as the underground water level raises,which seriously influences the slope safety. Through analyzing the slope stability at dump height of from 180 m to 230 m,it is shown that,within the range of from 180 m to 220 m,the dump safety coefficient is declined from 1. 122 to 1. 116,and at 230 m,the safety factor is increased to 1. 142. The law of the slope stability under the changes of the water level and slope height provides a powerful basis for the slope safety evaluation and the determination of the regulation scheme.
出处
《金属矿山》
CAS
北大核心
2015年第4期166-168,共3页
Metal Mine
关键词
排土场
边坡
地下水
高度
稳定性分析
Waste dump
Slope
Groundwater
Height
Stability analysis
作者简介
李传林（1961-），男，主任，工程师。
