Experimental research on the effect of water-rock interaction in filling media of fault structure

IF 2.5 3区工程技术 Q2 ENGINEERING, CIVIL

Geomechanics and Engineering Pub Date : 2021-01-01 DOI:10.12989/GAE.2021.24.5.471

Dong Faxu, Peng Zhang, Sun Wenbin, Shaoliang Zhou, Kong Lingjun

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引用次数: 4

Abstract

Water damage is one of the five disasters that affect the safety of coal mine production. The erosion of rocks by water is a very important link in the process of water inrush induced by fault activation. Through the observation and experiment of fault filling samples, according to the existing rock classification standards, fault sediments are divided into breccia, dynamic metamorphic schist and mudstone. Similar materials are developed with the characteristics of particle size distribution, cementation strength and water rationality, and then relevant tests and analyses are carried out. The experimental results show that the water-rock interaction mainly reduces the compressive strength, mechanical strength, cohesion and friction Angle of similar materials, and cracks or deformations are easy to occur under uniaxial load, which may be an important process of water inrush induced by fault activation. Mechanical experiment of similar material specimen can not only save time and cost of large scale experiment, but also master the direction and method of the experiment. The research provides a new idea for the failure process of rock structure in fault activation water inrush.

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断裂构造充填介质中水-岩相互作用影响的实验研究

水害是影响煤矿安全生产的五大灾害之一。在断层活化突水过程中，水对岩石的侵蚀是一个非常重要的环节。通过断层充填样品的观察与实验，根据现有的岩石分类标准，将断层沉积物分为角砾岩、动态变质片岩和泥岩。研制了具有粒径分布、胶结强度、水分合理性等特点的类似材料，并进行了相关试验分析。试验结果表明，水岩相互作用主要降低了相似材料的抗压强度、机械强度、黏聚力和摩擦角，单轴载荷作用下易产生裂缝或变形，这可能是断层活化诱发突水的重要过程。相似材料试件的力学实验，不仅节省了大规模实验的时间和成本，而且掌握了实验的方向和方法。该研究为断层活化突水作用下岩石结构的破坏过程提供了新的思路。

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来源期刊

Geomechanics and Engineering ENGINEERING, CIVIL-ENGINEERING, GEOLOGICAL

CiteScore

5.20

自引率

25.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Geomechanics and Engineering aims at opening an easy access to the valuable source of information and providing an excellent publication channel for the global community of researchers in the geomechanics and its applications. Typical subjects covered by the journal include: - Analytical, computational, and experimental multiscale and interaction mechanics- Computational and Theoretical Geomechnics- Foundations- Tunneling- Earth Structures- Site Characterization- Soil-Structure Interactions