含石英脉硅质板岩封闭应力测量研究

王涛; 叶维炜; 佟业蒙; 姜乃生; 刘力源

doi:10.1007/s12613-023-2667-9

Volume 30 Issue 12

Dec. 2023

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文章导航 > 矿物冶金与材料学报（英文） > 2023 > 30(12): 2310-2320

Tao Wang, Weiwei Ye, Yemeng Tong, Naisheng Jiang, and Liyuan Liu, Residual stress measurement and analysis of siliceous slate-containing quartz veins, Int. J. Miner. Metall. Mater., 30(2023), No. 12, pp. 2310-2320. https://doi.org/10.1007/s12613-023-2667-9

Cite this article as:

Tao Wang, Weiwei Ye, Yemeng Tong, Naisheng Jiang, and Liyuan Liu, Residual stress measurement and analysis of siliceous slate-containing quartz veins, Int. J. Miner. Metall. Mater., 30(2023), No. 12, pp. 2310-2320. https://doi.org/10.1007/s12613-023-2667-9

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研究论文

含石英脉硅质板岩封闭应力测量研究

1)
北京科技大学土木与资源工程学院, 北京 100083
2)
北京科技大学材料工程与科学学院, 北京 100083
3)
山东科技大学矿山岩层智能控制与绿色开采省部共建国家重点实验室培育基地, 青岛 266590

通讯作者:
佟业蒙 E-mail: tongyemeng977@163.com

刘力源 E-mail: liuliyuan@ustb.edu.cn

文章亮点

(1) 使用电子背散射衍射和光学显微镜对岩石微观结构进行了表征，并确定了满足X射线衍射封闭应力测量要求的区域

(2) 使用携带X射线衍射仪的sin²ϕ方法测量和计算了含硅片岩的石英脉的封闭应力

(3) 根据显微观察和封闭应力测试的结果对封闭应力的机制进行了分析

中文摘要

冲击地压等工程地质灾害，一直是影响煤矿生产安全的关键因素，而封闭应力被认为是解释这些地质力学现象的可行方法。本研究通过EBSD及光学显微镜进行岩石微观表征，确定存在满足XRD封闭应力测量要求测区；以岩体正交异性弹性理论为基础，利用X射线衍射仪，对含石英脉硅质板岩样品采用sin²ϕ法测量并计算封闭应力的量值，确定封闭应力的主应力；依据微观测试与封闭应力测试结果相结合分析封闭应力产生机制。主要结论如下：依据微观测试结果分析可得岩石在毫米范围内存在均质、粒径较小区域，满足XRD应力测定统计量要求；含石英脉板岩样品确定石英为标定矿物，获取不同角度ϕ和φ下（324）晶面衍射图谱，其衍射峰偏移方向具有一致性，证明待测样品存在封闭应力；石英脉XRD测得封闭应力主应力均为压应力，大小在10到33 MPa之间，最大主应力平行脉体走向，最小主应力垂直脉体走向；石英脉中小角晶界及孪晶界含量均较高，分析岩石中应力封存与岩石中矿物晶体非均质特性、塑性变形相关。本文所提出的封闭应力的测量方法可为后续开展不同类型岩石封闭应力的观测和相关研究提供参考。

关键词:

Research Article

Residual stress measurement and analysis of siliceous slate-containing quartz veins

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Abstract

Abstract

Engineering geological disasters such as rockburst have always been a critical factor affecting the safety of coal mine production. Thus, residual stress is considered a feasible method to explain these geomechanical phenomena. In this study, electron backscatter diffraction (EBSD) and optical microscopy were used to characterize the rock microcosm. A measuring area that met the requirements of X-ray diffraction (XRD) residual stress measurement was determined to account for the mechanism of rock residual stress. Then, the residual stress of a siliceous slate-containing quartz vein was measured and calculated using the sin²ϕ method equipped with an X-ray diffractometer. Analysis of microscopic test results showed homogeneous areas with small particles within the millimeter range, meeting the requirements of XRD stress measurement statistics. Quartz was determined as the calibration mineral for slate samples containing quartz veins. The diffraction patterns of the (324) crystal plane were obtained under different ϕ and φ. The deviation direction of the diffraction peaks was consistent, indicating that the sample tested had residual stress. In addition, the principal residual stress within the quartz vein measured by XRD was compressive, ranging from 10 to 33 MPa. The maximum principal stress was parallel to the vein trend, whereas the minimum principal stress was perpendicular to the vein trend. Furthermore, the content of the low-angle boundary and twin boundary in the quartz veins was relatively high, which enhances the resistance of the rock mass to deformation and promotes the easy formation of strain concentrations, thereby resulting in residual stress. The proposed method for measuring residual stress can serve as a reference for subsequent observation and related research on residual stress in different types of rocks.
- residual stress;
- siliceous sand;
- rock microstructure;
- X-ray diffraction;
- electron backscatter diffraction

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References

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