Field test of blasting vibration and adjacent slope stability under the influence of blasting vibration in mining

IF 0.7 Q4 ENGINEERING, MECHANICAL

Journal of Vibroengineering Pub Date : 2023-06-25 DOI:10.21595/jve.2022.22826

Can Liu, Feifei Wang, Qingyang Ren, Bin Chen, Hong-hua Jin, Songjun Cui, Ziqiang Zhu

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引用次数: 0

Abstract

Blasting mining in open-pit has a significant impact on the adjacent slope, which often causes the rock mass cracking and spalling of the slope to form a landslide disaster. In order to explore the impact of blasting vibration on the adjacent slope, field tests were carried out with professional testing equipment, and several blasting vibration data were measured. Sadovsky formula was used for fitting analysis, and the influence coefficient of blasting vibration was obtained. The slope stability analysis was carried out by using the limit equilibrium SLIDE analysis software, and the slope safety factor under the influence of blasting vibration was obtained. The results show that: The maximum blasting vibration speed monitored in this blasting is 2.1987 cm/s, and the main vibration frequency is 14.6484 Hz. Therefore, according to the standards in the regulations, the impact of this blasting on the slope meets the corresponding requirements. In this slope stability analysis, the blasting vibration influence coefficient Kc= 0.032, when 40 m away from the final slope is used. Morgen Prince method and Spencer method generally have higher safety factors than Bishop method. The safety factor of the analysis section at the 45° slope angle is 1.217. The slope can maintain stability under the influence of blasting vibration.

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矿山爆破振动影响下爆破振动及邻近边坡稳定性的现场试验

露天矿爆破开采对邻近边坡影响较大，往往导致边坡岩体开裂、剥落，形成滑坡灾害。为了探讨爆破振动对邻近边坡的影响，利用专业的测试设备进行了现场测试，并测量了多个爆破振动数据。采用萨多夫斯基公式进行拟合分析，得到了爆破振动的影响系数。利用极限平衡SLIDE分析软件对边坡进行了稳定性分析，得到了爆破振动影响下的边坡安全系数。结果表明：本次爆破监测到的最大爆破振动速度为2.1987cm/s，主振动频率为14.6484Hz。因此，根据规范中的标准，本次爆破对边坡的影响符合相应的要求。在本次边坡稳定性分析中，采用距离最终边坡40m时的爆破振动影响系数Kc=0.032。Morgen Prince法和Spencer法的安全系数通常高于Bishop法。分析断面在45°边坡角处的安全系数为1.217。边坡在爆破震动的影响下可以保持稳定。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Vibroengineering 工程技术-工程：机械

CiteScore

1.70

自引率

0.00%

发文量

审稿时长

4.5 months

期刊介绍： Journal of VIBROENGINEERING (JVE) ISSN 1392-8716 is a prestigious peer reviewed International Journal specializing in theoretical and practical aspects of Vibration Engineering. It is indexed in ESCI and other major databases. Published every 1.5 months (8 times yearly), the journal attracts attention from the International Engineering Community.

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