某铀矿床竖向分区安全稳定性研究

Study on the Safety and Stability of Vertical Zoning in a Uranium Deposit

通过对某矿床开采技术条件和矿体赋存特征分析研究,采用3DMine软件平台建立三维数字化矿体模型,确定上、下2个采区的最佳分界线标高为850 m,确定上部采区竖向开采范围为990~850 m,下部采区竖向开采范围为850~670 m。以矿床36号剖面勘探线为例,采用K.B.鲁别涅依他等人的公式对上、下采区间水平岩柱的临界厚度进行计算,得出上、下采区同时开采的安全间距为42 m。采用UDEC软件对矿床36号剖面水平岩柱稳定性进行数值模拟,水平岩柱在垂直方向上的最大位移为4.62 cm,对水平岩柱的整体稳定性没有影响。分区方案留设的水平岩柱可以保证上、下采区同时安全开采。

Based on the analysis and study of the mining technical conditions and ore body occurrence characteristics of a deposit, and by application of the 3DMine software platform to establish 3D digital ore body model, it is determined that the optimal boundary linepartition of the upper and lower mining areas is 850 m. The vertical mining range at the upper mining area is 990~850 m, and the vertical mining range at the lower mining area is 850~670 m. Taking the exploration line of the No.36 sectionof the deposit as an example, the critical thickness of the horizontal rock column is calculated by using the formula of K.B.Rubenie et al, and the safe spacing of the upper and lower mining areas is calculated to be 42 m.The UDEC software is numericallyused to simulate the horizontal rock pillar stability of the No.36 section of the deposit.The maximum displacement of the horizontal rock column at the vertical direction is 4.62 cm, and the overall stability of the horizontal rock column has no effect. The horizontal rock pillar reserved in the current zoning plan can ensure the safety of mining in the upper and lower mining areas at the same time.