Research and Application of Coal Seam Permeability Improvement Technology by Sectional Directional Hydraulic Fracturing

IF 1.2 4区工程技术 Q3 ACOUSTICS

Shock and Vibration Pub Date : 2024-02-29 DOI:10.1155/2024/8415703

Feng Wang

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引用次数: 0

Abstract

To address the challenging issue of gas control in the working faces of the Hegang mining area, based on segmented directional hydraulic fracturing technology, ABAQUS simulation software was employed to simulate and analyze the fracturing process of coal-rock masses under the action of segmented hydraulic fracturing. The study focused on the engineering application research within the mining roadway of the 23# coal seam in the Junde Coal Mine, China. The results indicate that the numerical simulation analysis reveals elliptical patterns in the stress, strain, and fracture width variation of the coal-rock masses influenced by the fracturing action. The width of the fractures exhibits a periodic variation pattern, initially increasing and then slightly decreasing with the injection of water pressure. Additionally, each successive variation shows a decreasing magnitude. After applying segmented hydraulic fracturing technology, the average gas extraction concentration increased by a maximum of 1.73 times, the average mixed flow rate increased by a maximum of 2.16 times, and the average gas extraction pure quantity increased by a maximum of 3.10 times. Segmented hydraulic fracturing can effectively improve gas extraction efficiency, reduce coal seam gas content, and have a depressurizing effect on coal-rock layers. The research findings provide new means for safe and efficient coal mining, particularly in enhancing gas extraction efficiency, alleviating strata pressure, and preventing gas disasters.

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分段定向水力压裂改善煤层渗透性技术的研究与应用

针对鹤岗采区工作面瓦斯治理的难题，基于分段定向水力压裂技术，采用ABAQUS模拟软件对分段水力压裂作用下的煤岩体压裂过程进行了模拟分析。该研究主要针对中国骏德煤矿 23#煤层采掘巷道进行工程应用研究。结果表明，数值模拟分析显示，受压裂作用影响，煤岩体的应力、应变和裂缝宽度变化呈椭圆形。裂缝宽度呈现周期性变化规律，随着注水压力的增加，裂缝宽度先增大后减小。此外，每次连续变化的幅度都在减小。采用分段水力压裂技术后，平均采气浓度最高提高了 1.73 倍，平均混合流速最高提高了 2.16 倍，平均采气纯量最高提高了 3.10 倍。分段水力压裂法能有效提高瓦斯抽采效率，降低煤层瓦斯含量，对煤岩层具有减压作用。研究成果为煤矿安全高效开采，特别是提高瓦斯抽采效率、减轻地层压力、预防瓦斯灾害提供了新的手段。

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来源期刊

Shock and Vibration 物理-工程：机械

CiteScore

3.40

自引率

6.20%

发文量

384

审稿时长

3 months

期刊介绍： Shock and Vibration publishes papers on all aspects of shock and vibration, especially in relation to civil, mechanical and aerospace engineering applications, as well as transport, materials and geoscience. Papers may be theoretical or experimental, and either fundamental or highly applied.