不同距离计算标准和有效性指标组合方案对节理优势组划分的影响研究

发布时间：2018-01-31 11:45

本文关键词： 岩石力学距离有效性指标优势组划分产状数据　出处：《岩石力学与工程学报》2015年S1期 　论文类型：期刊论文

【摘要】：通过对随机逼近法的扩展,实现不同距离计算标准下的优势组划分,研究不同的距离计算标准和有效性指标组合方案的性能。分析结果表明:欧几里德距离、球面最小弧长和夹角正弦平方均可作为节理优势组划分的距离计算标准,但在不同的距离计算标准下,有效性指标的性能存在明显差异。CH指标仅在球面最小弧长标准下有效;I指标则在欧几里德距离和夹角正弦平方标准下均能给出正确分组结果;DB和XB指标在3种距离计算标准下均可以对优势组数目作出合理的选择。目标函数对分组形式优劣程度的判断与有效性指标的判断存在差异,仅在夹角正弦平方标准下,I指标与目标函数存在良好的一致性。基于分析结果,提出夹角正弦平方距离计算标准和I指标的最优组合方案,实现甘肃北山深部岩体节理产状的优势组划分。
[Abstract]:By extending the stochastic approximation method, the superiority group partition under different distance calculation standards is realized, and the performance of different distance calculation criteria and validity index combination scheme is studied. The results show that: Euclidean distance. The minimum arc length and the sinusoidal square of the spherical surface can be used as the standard of distance calculation for the division of the dominant group of joints, but under different standards of distance calculation. There are obvious differences in the performance of the effectiveness index. Ch index is only effective under the minimum arc length standard of spherical surface. I index can give correct grouping results under Euclidean distance and sinusoidal square standard of angle. DB and XB indexes can make a reasonable choice on the number of dominant groups under the three standards of distance calculation. There are differences between the objective function and the validity index in judging the degree of superiority and inferiority of the grouping form. Only under the standard of the sinusoidal square of the angle, there is good agreement between the index of I and the objective function. Based on the analysis results, the optimal combination scheme of the standard for calculating the square distance of the sinusoidal square of the angle and the index I is put forward. To achieve the division of the dominant formation of joints in the deep rock mass of Beishan, Gansu Province.
【作者单位】：核工业北京地质研究院环境工程研究所;核工业北京地质研究院中核集团高放废物地质处置评价技术重点实验室;
【基金】：国家自然科学基金资助项目(11202069)
【分类号】：TU45
【正文快照】： 地质处置评价技术重点实验室,北京100029)1引言岩体由岩块和分割它们的结构面组成。按照其规模,结构面一般可以分为五级[1]。I,II,III级结构面,又统称为断层,延伸长度数百米以至数千米。此类结构面数量相对较少,在岩石工程中一般都列为专门性调查对象,进行逐条调查。IV,V级结

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