关于复合煤和岩石变形的断裂应力-微震-温度合模型的研究
Zhen Yang1, Liwen Ji1, Xin Li1
1Faculty of Electrical and Control Engineering, Liaoning Technical University, Huludao 125105, China.
ACS omega
|April 7, 2025
概括
这项研究揭示了压力,微地震活动和变形煤中的温度之间的合关系. 开发的应力微震热 (SMT) 模型准确地预测了煤炭和岩石动态灾害.
科学领域:
- 地质物理学 地质物理学
- 岩石机械学 岩石机械学
- 材料科学 材料科学 材料科学
背景情况:
- 了解压力,微地震事件和温度之间的复杂相互作用对于预测和减轻复合煤岩构成中的动态灾害至关重要.
- 现有的模型,如应力-电荷-热 (SCT) 合模型,提供了一个基础,但可能无法完全捕捉这些合现象的细微差别.
研究的目的:
- 为了研究压力,微地震活动和温度之间的合关系,在复合煤岩的变形和断裂期间.
- 开发和验证一种新的压力-微震-热 (SMT) 合模型,用于预测煤炭和岩石动态灾害.
主要方法:
- 制备复合煤石样本,采用不同的煤与岩石比率 (1:1:1, 1:2:1, 1:4:1) 和纯煤.
- 在不同负载速度 (0.1,0.3,0.4,0.5毫米/分钟) 进行的单轴负载断裂实验.
- 在实验期间监测电磁辐射,微地震电压和温度信号.
- 使用实验数据推导和验证SMT合模型,将其精度与SCT模型进行比较.
主要成果:
- 微震电压和电磁辐射信号最初是弱的,在应力最大和轻微的温度下降附近达到峰值.
- 增加的加载率导致信号峰值下降,微地震电压显示出更突出的变化.
- 在预测煤炭和岩石动态灾害方面,SMT模型表现出高的适配精度 (R2>0.9),超过了SCT模型的精度.
结论:
- 该研究确立了复合煤岩中压力,微地震和温度信号之间强大的一致性和前体预警功能.
- 开发的SMT合模型为预测和预测煤炭和岩石中的动态灾害提供了一种新的,高度准确的方法.
- 这些发现对于加强采矿环境中的安全和运营策略至关重要.
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