Rapid profiling rock mass quality underneath tunnel face for Sichuan-Xizang Railway

IF 8.2 1区工程技术 Q1 ENGINEERING, CIVIL

Underground Space Pub Date : 2024-05-26 DOI:10.1016/j.undsp.2024.02.004

Siyuan Wu , Min Qiu , Zhao Yang , Fuquan Ji , Zhongqi Quentin Yue

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引用次数: 0

Abstract

The Sichuan-Xizang Railway is a global challenge, surpassing other known railway projects in terms of geological and topographical complexity. This paper presents an approach for rapidly profiling rock mass quality underneath tunnel face for the ongoing construction of the Sichuan-Xizang Railway. It adopts the time-series method and carries out the quantitative analysis of the rock mass quality using the depth-series measurement-while-drilling (MWD) data associated with drilling of blastholes. A tunnel face with 15 blastholes is examined for illustration. The results include identification of the boundary of homogeneous geomaterial by plotting the blasthole depth against the net drilling time, as well as quantification of rock mass quality through the recalculation of the new specific energy. The new specific energy profile is compared and highly consistent with laboratory test, manual logging and tunnel seismic prediction results. This consistency can enhance the blasthole pattern design and facilitate the dynamic determination of charge placement and amount. This paper highlights the importance of digital monitoring during blasthole drilling for rapidly profiling rock mass quality underneath and ahead of tunnel face. It upgrades the MWD technique for rapid profiling rock mass quality in drilling and blasting tunnels.

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川藏铁路隧道工作面下岩体质量快速剖面图

川藏铁路是一项全球性挑战，其地质和地形复杂程度超过了其他已知的铁路项目。本文提出了一种快速剖析隧道工作面下岩体质量的方法，用于正在进行的川藏铁路建设。该方法采用时间序列法，利用与钻孔相关的边钻边测深（MWD）数据对岩体质量进行定量分析。以一个有 15 个爆破孔的隧道工作面为例进行说明。结果包括通过绘制爆破孔深度与净钻进时间的对比图来确定均质岩土材料的边界，以及通过重新计算新的比能量来量化岩体质量。新的比能量曲线与实验室测试、人工测井和隧道地震预测结果进行了比较，结果高度一致。这种一致性可以增强爆破孔模式设计，并有助于动态确定装药位置和数量。本文强调了在爆破钻孔过程中进行数字监测以快速剖析隧道工作面下方和前方岩体质量的重要性。它提升了 MWD 技术在隧道钻孔和爆破中快速分析岩体质量的能力。

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

Underground Space ENGINEERING, CIVIL-

CiteScore

10.20

自引率

14.10%

发文量

审稿时长

63 days

期刊介绍： Underground Space is an open access international journal without article processing charges (APC) committed to serving as a scientific forum for researchers and practitioners in the field of underground engineering. The journal welcomes manuscripts that deal with original theories, methods, technologies, and important applications throughout the life-cycle of underground projects, including planning, design, operation and maintenance, disaster prevention, and demolition. The journal is particularly interested in manuscripts related to the latest development of smart underground engineering from the perspectives of resilience, resources saving, environmental friendliness, humanity, and artificial intelligence. The manuscripts are expected to have significant innovation and potential impact in the field of underground engineering, and should have clear association with or application in underground projects.