Seepage and wetting evolution characteristics of coal fracture under the dual influence of ultrasonic stimulation and surfactant modification

IF 3.8 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics Pub Date : 2025-03-20 DOI:10.1016/j.ultras.2025.107646

Qiming Huang , Bo Yu , Cheng Zhai , Gang Wang , Haonan Shi , Ting Liu , Hao Xu , Xu Wang , Hongzhan Liu

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引用次数: 0

Abstract

Coal seam water injection can effectively improve the water content of the coal seam and control the dust pollution in the mining process from the source. In this paper, we investigate the changes in internal fracture structure and water transport in coal samples by double treatment of surfactant and ultrasonic wave on anthracite samples. Ultrasonic treatment of coal samples immersed in water and observation of the difference in wetting characteristics before and after treatment. The results demonstrate that the primary fracture in the coal samples expands within 4–5 h of ultrasonic stimulation, a new fracture with an opening between 10 and 15 µm is generated during the stimulation process and the permeability of the coal samples increases by four to eight times compared with the untreated one. It is worth noting that water can fully penetrate the newly formed fracture during the ultrasonic intervals. Ultrasound can make surfactants dissolve better, but the thermal and cavitation effects of ultrasound can also inhibit the effect of surfactants in promoting water absorption in coal. The results guide future research and development of ultrasonic-enhanced water injection technology in coal seams.

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超声刺激和表面活性剂改性双重作用下煤裂隙渗流润湿演化特征

煤层注水可以有效地提高煤层含水率，从源头上控制开采过程中的粉尘污染。本文研究了表面活性剂和超声波双重处理对煤样内部裂隙结构和水分输运的影响。浸水煤样超声处理及处理前后润湿特性差异的观察结果表明：超声刺激后4 ~ 5 h，煤样中的主裂缝扩大，在刺激过程中产生一条新裂缝，裂缝开度在10 ~ 15µm之间，煤样渗透率比未处理煤样提高了4 ~ 8倍。值得注意的是，在超声波间隔期间，水可以完全渗透新形成的裂缝。超声波可以使表面活性剂溶解得更好，但超声波的热效应和空化效应也会抑制表面活性剂促进煤中吸水的作用。研究结果对今后超声强化煤层注水技术的研究和开发具有指导意义。

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

Ultrasonics 医学-核医学

CiteScore

7.60

自引率

19.00%

发文量

186

审稿时长

3.9 months

期刊介绍： Ultrasonics is the only internationally established journal which covers the entire field of ultrasound research and technology and all its many applications. Ultrasonics contains a variety of sections to keep readers fully informed and up-to-date on the whole spectrum of research and development throughout the world. Ultrasonics publishes papers of exceptional quality and of relevance to both academia and industry. Manuscripts in which ultrasonics is a central issue and not simply an incidental tool or minor issue, are welcomed. As well as top quality original research papers and review articles by world renowned experts, Ultrasonics also regularly features short communications, a calendar of forthcoming events and special issues dedicated to topical subjects.