金属矿山
金屬礦山
금속광산
METAL MINE
2015年
4期
166-168
,共3页
排土场%边坡%地下水%高度%稳定性分析
排土場%邊坡%地下水%高度%穩定性分析
배토장%변파%지하수%고도%은정성분석
Waste dump%Slope%Groundwater%Height%Stability analysis
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。
由于露天礦開採量的增大和土地資源的緊缺,迫使企業在老排土場上進行增高擴容,由此引起的安全問題日益突齣。以齊大山鐵礦某排土場為例,分析驗算該排土場增高擴容方案的可行性。通過室內實驗取得的邊坡散體力學參數,根據工程地質勘察成果建立排土場邊坡模型,利用極限平衡法計算排土場分彆坐落于基巖、黏土層之上,邊坡體內無地下水,低水位、高水位情況下的邊坡安全繫數,穫得瞭地下水對于排土場邊坡安全的影響規律；尤其是噹排土場坐落于黏土層之上時,邊坡安全繫數隨著地下水位的不斷升高而迅速降低,嚴重影響邊坡安全。由排土場180~230 m不同高度的邊坡穩定性分析可知,在180~220 m,排土場安全穩定性繫數由1．122降到1．116；而在230 m,安全繫數則增長到1．142。所穫邊坡穩定性隨地下水位和邊坡高度的變化規律為邊坡安全性評價及整治方案確定提供瞭有力依據。
유우로천광개채량적증대화토지자원적긴결,박사기업재로배토장상진행증고확용,유차인기적안전문제일익돌출。이제대산철광모배토장위례,분석험산해배토장증고확용방안적가행성。통과실내실험취득적변파산체역학삼수,근거공정지질감찰성과건립배토장변파모형,이용겁한평형법계산배토장분별좌락우기암、점토층지상,변파체내무지하수,저수위、고수위정황하적변파안전계수,획득료지하수대우배토장변파안전적영향규률；우기시당배토장좌락우점토층지상시,변파안전계수수착지하수위적불단승고이신속강저,엄중영향변파안전。유배토장180~230 m불동고도적변파은정성분석가지,재180~220 m,배토장안전은정성계수유1．122강도1．116；이재230 m,안전계수칙증장도1．142。소획변파은정성수지하수위화변파고도적변화규률위변파안전성평개급정치방안학정제공료유력의거。
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 ob-tained from the indoor experiments,slope model of waste dump was established based on the engineering geological investiga-tion. 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 de-clined 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 chan-ges of the water level and slope height provides a powerful basis for the slope safety evaluation and the determination of the reg-ulation scheme.
