基于Mathews稳定图法的采场结构参数确定

Stope Dimension Determination based on Mathews Stability Diagram Method

采场结构参数是上向进路采矿法的关键参数之一,对采场安全起到至关重要的作用。以萨热克铜矿小矿体为研究对象,采用工程地质调查、Mathews稳定图与理论计算相结合的方法,对进路结构进行参数优化。研究表明:小矿体节理平均间距为1.39 m,平均节理密度为0.83条/m,具有3组优势节理,分别为58°∠72°、87°∠71°、253°∠79°;该矿体的理论稳定数N=10.94,采场极限形状系数S=3;最终得出当采场长度为80 m时,萨热克铜矿小矿体上向进路设计极限宽度为6.0 m。

Stope dimension is one of the most critical parameters for upward drift stoping method.It presents great effects on the mining stope safety.Researches on the small ore body in Sazek copper mine with combination of engineering geological survey,Mathews stability diagram and theoretical calculation method is made to optimize drift structure dimensions.Results indicate that the average joint spacing of small ore body is 1.39 m,and the average frequency of joints is 0. 83 strip / m. All the three main dominant joints are 58°∠72°,87°∠71°,253° ∠79° separately. The theoretical stability factor（ N） for the small ore body is 10.94.The extreme shape coefficient（ S） for the stope is 3.All above parameters draw the conclusions that when the stope length reaches 80 m,the maximum width of upward drift for the small ore body in Sazek copper mine is 6 m.