摘要
尽可能降低间柱采场开采的贫化和损失、充分回采间柱矿产资源,是某矿山当前亟待解决的问题。从控制间柱采场复杂边界的角度,运用显示动力分析软件LS-DYNA对间柱采场边排孔的装药结构、两帮和两端的边孔距进行数值优化,对比4种间隔装药结构方案边界处测点的x向振动速度方差,得到间隔比例为0.588最优装药结构方案产生的爆破振动最均匀;根据第四强度理论,得出最合理两帮和两端边孔距分别为1.6 m和1.2 m,此时对充填体和岩石造成的破坏最小。将研究成果应用于试验间柱采场,验证了间柱采场贫损爆破控制技术的有效性。
In a certain underground lead-zinc mine, an urgent task is to decrease the dilution and the loss of the pillar stope mining as much as possible and to mine the pillar mineral resources fully. In order to control the stope complicated boundary, the explicit dynamic analysis software LS-DYNA is used for the numerical simulation optimization of the charging structure of side holes, and the spacings of sides and both ends of pillar stopes. The comparison of the x-direction vibrati6n velocity variances of four interval charging structure plans at the boundary measurement points shows that the blasting vibration is the most uniform by the optimal hole charging structure scheme with the interval proportion of 0.588. The optimal hole spacings of sides and both ends are, respectively, 1.6 m and 1.2m with the minimum destruction of rock and backfill based on the Fourth Strength Theory. Applying the research result to the trial pillar stope, the feasibility of the pillar stope dilution and loss control is verified.
出处
《科技导报》
CAS
CSCD
北大核心
2014年第28期79-84,共6页
Science & Technology Review
基金
国家自然科学基金项目(51274250)
国家"十二五"科技支撑计划项目(2012BAK09B02-05)
