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Blast-induced rock movement measurement for grade control

机译：爆炸诱发的岩石运动测量，用于坡度控制

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More batch tests are planned at the mine. * Mine site and/or user specific BMM equipment cost information is available from Blast Movement Technologies Inc. Conclusions * The direction of blast-induced rock movement was parallel within ± 5 degrees from the predicted vector of movement given by the blast design software. * The secondary free face tended to provide sufficient relief to bias blast movement towards the initiation direction. * The blasting of an area of ore into a waste zone results in an overlay of the top portions of the ore zone on the waste zone, which makes separation of zones difficult and causes dilution. * Blast movement correction to reduce ore loss and dilution should be considered, particularly when high powder factors are required to obtain adequate fragmentation. * In many cases where geology is similar, the blast movement measurement with BMM balls may not be necessary for every bench. * Not all the balls were found, due to electronic failure due to blast damage. * The batch test was inconclusive, since it was not known whether the estimated ore/ waste boundaries actually existed where they were located. (These are being developed by the manufacturer.) * A detector with an integrated GPS would reduce the cost of the surveyor. * Careful consideration should be given to modeling the location and shape in 3D of the post-blast polygons based on the measured vectors from the blast.
机译：计划在矿山进行更多的批量测试。 *矿场和/或用户特定的BMM设备成本信息可从Blast Movement Technologies Inc.获得。结论*爆炸引起的岩石运动的方向与爆炸设计软件给出的运动预测矢量平行±5度。 *次要自由面倾向于提供足够的释放力，以使爆炸运动朝着初始方向偏移。 *将矿石区域爆破成废物区会导致矿石区顶部覆盖在废物区上，这使区域分离变得困难并引起稀释。 *应该考虑进行鼓风运动校正，以减少矿石损失和稀释，特别是当需要高粉化因子以获得足够的破碎度时。 *在许多地质情况相似的情况下，不一定需要每个工作台都使用BMM球进行爆炸运动测量。 *由于爆炸损坏导致电子故障，因此未找到所有球。 *批次测试尚无定论，因为尚不清楚估计的矿石/废物边界是否真正存在于它们所在的位置。 （这些是由制造商开发的。）*带有集成GPS的探测器将降低测量师的成本。 *应仔细考虑根据爆炸产生的测量矢量，对爆炸后多边形的3D位置和形状进行建模。

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  • 来源
    《Mining Engineering》 |2011年第2期|p.34-39|共6页
  • 作者

    Ananta L Yennamani Salvador Aguirre Pierre Mousset-Jones;

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    Ananta L. Yennamani is graduate mining engineer with, Salvador Aguirre is drill and blast engineer at the Phoenix Mine, and Pierre Mousset-Jones, member SME, is professor of mining engineering at the Mackay School of Earth Science and Engineering, University of Nevada Reno, Reno, NV, e-mail mousset@mines.unr.edu.;

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