中尺度复杂岩体应力波传播特性的微震试验研究

彭府华; 李庶林; 程建勇; 贾宝珊

doi:10.11779/CJGE201402007

中尺度复杂岩体应力波传播特性的微震试验研究 English Version

1. 长沙矿山研究院,湖南长沙 410012; 2. 厦门大学,福建厦门 361005; 3. 洛阳栾川钼业集团股份有限公司,河南洛阳 471500

详细信息

作者简介:
彭府华(1987- )，男，硕士，从事采矿与矿山岩石力学的研究工作。E-mail: fuhuapeng@126.com。

通讯作者:
李庶林

中图分类号: TU411
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出版历程
- 收稿日期: 2013-06-13
- 发布日期: 2014-02-20

Experimental study on characteristics of stress wave propagation in mesoscale and complex rock mass by microseismic monitoring

1. Changsha Institute of Mining Research, Changsha 410012, China; 2. Xiamen University, Xiamen 361005, China; 3. China Molybdenum Co., Ltd., Luoyang 471500, China

摘要

摘要: 采用全数字型多通道微震监测系统,对深部复杂采空区岩体和上部露天台阶絮渣岩体分别进行了现场爆破应力波传播特性试验,利用P波触发时间和传播距离组成的离散点进行线性拟合,得出应力波传播速度,结果显示深部复杂采空区岩体和上部絮渣岩体明显出现两个层状速度模型。利用应力波振幅和传播距离组成的离散点进行曲线拟合,并对应力波信号进行频谱分析和滤波处理,研究应力波的衰减特性。试验结果表明,应力波振幅随传播距离的增加而减小,且在数值上呈乘幂衰减；应力波衰减系数和应力波频率成正比,数值上呈三次多项式关系,高频成分应力波衰减更加明显。利用试验数据,分别计算出深部复杂采空区岩体和上部絮渣岩体的平均品质因子,计算结果分别为4.055和2.478,两者远小于一般原岩的岩体品质因子,说明复杂采空区和絮渣的存在对应力波的传播有很大影响。
- 微震试验 /
- 复杂岩体介质 /
- 波速 /
- 衰减特性 /
- Q值
Abstract: By using the digital multi-channel microseismic monitoring system, the characteristics of blast stress wave propagation in deep complex and mined-out area and upper fractured rock mass are tested. The wave velocity is acquired by the curve fitting method, which uses the P wave triggering time and propagation distance. The results show that the wave velocities in deep complex and mined-out rock mass and upper coagula rock mass are obviously different. Fitted the curve by using the stress wave amplitude and propagation distance, it is found that the stress wave amplitude decreases in the form of power when the propagation distance increases. By using the signal spectrum analysis and filtering, the attenuation coefficient and frequency are in cubic polynomial relations, and the attenuation of the high-frequency wave is more obvious. The average quality factors in deep complex and mined-out area and upper fractured rock mass, are calculated and they are 4.055 and 2.478, far less than those of the original rock mass, indicating that the mined-out area and fracture have great influence on the stress wave propagation.
- microseismic test /
- complex rock mass /
- wave velocity /
- attenuation characteristic /
- Q value

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