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声发射法地应力测量在大柳行金矿的应用

Application of acoustic emission method to crustal stress measurement in Daliuhang Gold Mine

  • 摘要: 声发射法测定地应力因测试工作量小、成本低而广泛应用于矿山地应力测量中。大柳行金矿奄口矿区随着开采深度不断加深,地压显现明显,测量原岩地应力,研究地应力场的分布规律可指导深井开采。通过对60个试件进行声发射加载试验,测得了5个不同深度测点岩体的主应力大小和最大水平主应力方向,最大水平主应力随埋深的增加而增大,不同深度最大水平主应力的方位一致性较好;垂直主应力值约为自重应力值的2倍。测试结果可为矿山工程开采设计和施工提供必要的参考依据。

     

    Abstract: Acoustic emission method is widely used for crustal stress measurement in mines due to small workload and low cost.With increasing depth in Ankou Mining District of Daliuhang Gold Mine,the crustal stress increases.So the measurement of original rock and study of crustal stress field distribution rules can guide to develop deep mines.Based on the acoustic emission loading tests on 60 test pieces,the major stress magnitude and the maximum horizontal major stress direction in 5 measurement spots with different depth are measured,showing that the maximum horizontal major stress increases with increasing depth and the consistency of the maximum horizontal major stress direction in different depth is good;the vertical major stress magnitude is approximately twice its gravity stress.The measurement results provide necessary reference for mining engineering design and construction.

     

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