基于L-G图论法的某大型铀矿床露天开采境界  

Open-pit Mining Boundary of a Big Uranium Deposit Based on L-G Graph Theory

作　　者：沈玉众 刘鹏 杨江坤 施林峰 SHEN Yuzhong;LIU Peng;YANG Jiangkun;SHI Linfeng(The Fourth Research and Design Engineering Corporation of CNNC,Shijiazhuang 050021,China;Beijing Sinomine Smartech Inc.,Beijing 100043,China)

机构地区：[1]中核第四研究设计工程有限公司,石家庄050021 [2]北京中矿智信科技有限公司,北京100043

出　　处：《科技和产业》2024年第15期203-210,共8页Science Technology and Industry

摘　　要：针对某大型铀矿床A01采用全地下或全露天开采均不合适的情况,需要优化露天开采境界。通过对传统境界确定方法与基于矿块模型的优化方法进行对比分析,选择基于L-G(Lerchs-Grossman)图论法开展露天开采境界优化;然后,采用隐式建模方法建立矿床岩性模型并在此基础上开展露天采场边坡稳定性分析,确定不同区域的最优边坡角;同时,在建立矿床块体模型的基础上,对矿床开采损失率、贫化率开展敏感性分析,考虑其对总价值和剥采比的影响,结合生产开采工艺确定了矿床损贫指标,在此基础上开展露天境界优化;最后,通过调整价格因子,得到露天开采境界变化趋势,以此为基础提出3种露天开采境界,通过分析回采指标,确定最终的露天开采境界。In view of the situation that it is not suitable to use all underground mining or all open pit mining for a large uranium deposit,it is necessary to optimize the open pit mining limit.Through comparison and analysis of the traditional boundary determination method and the optimization method based on block model,the L-G(Lerchs-Grossman)graph theory method is selected to optimize the open pit mining boundary.Then,the lithology model of the deposit is established by using the implicit modeling method,and the slope stability analysis is carried out on the basis of this,and the optimal slope angles in different areas are determined.At the same time,on the basis of establishing the block model of the deposit,the sensitivity analysis of the deposit mining loss rate and dilution rate is carried out,considering their influence on the total value and stripping ratio,combined with the production and mining technology to determine the deposit loss and depletion index,and on this basis,the open-pit boundary optimization is carried out.Finally,by adjusting the price factor,the change trend of open-pit mining limit is obtained.Based on this,three kinds of open-pit mining limits are put forward,and the final open-pit mining limits are determined by analyzing the mining index.

关 键 词：隐式建模 L-G(Lerchs-Grossman)图论 边坡稳定性 境界优化 

分 类 号：TD85[矿业工程—金属矿开采]