Deterministic cascade evolution in coal and gas outbursts: from early acoustic signatures to system-wide failure

IF 11.7 1区工程技术 Q1 MINING & MINERAL PROCESSING

International Journal of Mining Science and Technology Pub Date : 2025-06-18 DOI:10.1016/j.ijmst.2025.05.003

Yang Lei, Zhijie Wen, Liang Wang, Ting Ren, Yujun Zuo

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Abstract

Coal and gas outbursts constitute a critical hazard in underground mining operations, characterized by rapid transitions from localized instability to catastrophic failure. Understanding the relationship between initial characteristics and final outburst scale remains a fundamental challenge in geomechanics. This study conceptualizes outbursts as deterministic cascade systems through integrated physical simulations combining high-sensitivity infrasound monitoring with energy analysis under controlled gas pressure (0.5–1.0 MPa) and confining stress (5–10 MPa) conditions. Our complementary analytical algorithms—the absolute amplitude integral and predominant period function—revealed characteristic step-wise patterns in outburst development. Quantitative analysis established a robust correlation (R2=0.91) between initial acoustic response and final outburst intensity. Energy analysis demonstrated that gas expansion dominates the outburst process (91.81%–99.09% of total energy), with desorption gas contributing 59.1%–77.7%. Time-frequency analysis showed systematic frequency migration from high (12–15 Hz) to low (4–8 Hz) bands during outburst progression, reflecting hierarchical spatial scale expansion. The concentrated energy release (>20% of total) within initial 0.2 s provides a mechanistic basis for the deterministic nature of outburst evolution. These mechanistic insights establish a quantitative framework for developing physics-based monitoring protocols and risk assessment methodologies applicable to underground coal mining operations.

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煤和瓦斯突出的确定性级联演化：从早期声学特征到全系统失效

煤和瓦斯突出是地下采矿作业中的重大危险，其特点是从局部不稳定迅速过渡到灾难性破坏。了解初始特征与最终突出规模之间的关系仍然是地质力学的一个基本挑战。本研究通过综合物理模拟，结合高灵敏度次声监测和能量分析，在可控气体压力（0.5-1.0 MPa）和围应力（5-10 MPa）条件下，将爆发概念化为确定性级联系统。我们的互补分析算法-绝对振幅积分和优势周期函数-揭示了突出发展的特征阶跃模式。定量分析表明，初始声响应与最终突出强度之间存在显著相关（R2=0.91）。能量分析表明，突出过程以瓦斯膨胀为主（占总能量的91.81% ~ 99.09%），其中解吸气体贡献59.1% ~ 77.7%。时频分析结果表明，在溃决过程中，系统频率从高频段（12 ~ 15 Hz）向低频段（4 ~ 8 Hz）偏移，反映了空间尺度的分层扩展。在最初0.2 s内能量集中释放（占总能量的20%）为突出演化的确定性提供了机理依据。这些机制见解为开发适用于地下煤矿作业的基于物理的监测协议和风险评估方法建立了定量框架。

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

International Journal of Mining Science and Technology Earth and Planetary Sciences-Geotechnical Engineering and Engineering Geology

CiteScore

19.10

自引率

11.90%

发文量

2541

审稿时长

44 days

期刊介绍： The International Journal of Mining Science and Technology, founded in 1990 as the Journal of China University of Mining and Technology, is a monthly English-language journal. It publishes original research papers and high-quality reviews that explore the latest advancements in theories, methodologies, and applications within the realm of mining sciences and technologies. The journal serves as an international exchange forum for readers and authors worldwide involved in mining sciences and technologies. All papers undergo a peer-review process and meticulous editing by specialists and authorities, with the entire submission-to-publication process conducted electronically.