通过合热水力机械模型量化煤矿自发燃烧上的断裂粗度影响
Guoju Lu1, Guofei Zhao2, Liya Yu2
1Department of Safety Engineering, Shanxi Institute of Energy, Jinzhong, 030600, China. SXgjlu@163.com.
Scientific reports
|July 10, 2025
概括
断裂粗度显著影响煤层气体迁移和自燃风险. 一个新的模型量化了这种效应,改善了用于更安全的采矿业务的预测和预防策略.
科学领域:
- 采矿工程 采矿工程 采矿工程
- 地质工程是地质工程.
- 燃烧科学 燃烧科学
背景情况:
- 准确预测和预防自发煤层燃烧对于采矿安全至关重要.
- 量化断裂粗度对气体泄漏的影响是一个重大挑战.
研究的目的:
- 开发一种用于工程规模燃烧预测的新型预测模型.
- 将断裂粗度与热传导和气体压力等其他因素结合起来,以便对煤层气体迁移进行全面分析.
主要方法:
- 开发一种包含跨学科断裂粗度参数 (η) 的新型预测模型.
- 折断粗度,导热,化学反应,气体压力,煤岩应力,变形和吸附 - 溶解机制的整合.
- 模型的验证和在Luling煤矿的特定煤层的应用.
主要成果:
- 断裂粗度参数 (η) 准确地描述了断裂的不规则性,并影响了气体流量和燃烧潜力.
- 一个从0.5增加到0.8的η导致了7.3%的返回气道气体增加和51.7%的煤层透率下降.
- 在同等通风下,较高的断裂粗度将返回气道气体度提高到16.7%.
结论:
- 拟议的断裂粗度参数提供了更精确的气体透性,热传递和煤层变形的表示.
- 这项研究引入了一个新的定量框架,用于预测和减轻煤矿自燃.
- 断裂粗度在煤矿危险评估和预防中起着关键作用.
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