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SiO2纳米流体度对煤炭微机械削弱行为的影响
Quanle Zou1, Bochao Xu1, Weizhi Wang1
1State Key Laboratory of Coal Mine Disaster Dynamics and Control, School of Resources and Safety Engineering, Chongqing University, No. 174 Shazhengjie, Shapingba, Chongqing 400044, China. 842742254@qq.com.
Nanoscale
|October 15, 2024
概括
二氧化 (SiO2) 纳米流体可以在煤床中提取甲时防止煤炭和气体爆发. 较低度会削弱煤炭,而较高度会通过填补微裂来加强煤炭,为防爆策略提供了洞察力.
科学领域:
- 地质地质地质地质地质地
- 材料科学 材料科学 材料科学
- 能源工程 能源工程
背景情况:
- 煤床甲开采面临煤炭和天然气爆发的安全挑战.
- 煤层水注入是防止爆发的关键方法.
- 二氧化 (SiO2) 纳米流体可以通过提高煤层湿透性来提高注水效率.
研究的目的:
- 为了研究用SiO2纳米流体处理的煤样品的微观机械性能.
- 为了阐明SiO2纳米流体减轻煤炭和气体爆发的机制.
主要方法:
- 纳米沉积试验是在用不同度SiO2纳米流体 (0.5重%,1.0重%,1.5重%) 处理的煤样品上进行的.
- 扫描电子显微镜 (SEM) 和能量分散式X射线光谱 (EDX) 用于微观结构和组成分析.
主要成果:
- SiO2纳米流体处理导致煤样品变软,硬度降低了高达21.51%,弹性模量降低了高达27.97%.
- 低SiO2度增加了水的吸收,减少了凝聚力,削弱了煤炭.
- 高度的SiO2填充了微裂,限制了水分的进入,并加强了煤炭.
结论:
- 这项研究揭示了SiO2纳米流体对煤炭机械性能的度依赖作用.
- 这些发现为应用SiO2纳米流体在煤床中提取甲以防止爆发提供了定量基础.
- 可以选择最佳的SiO2纳米流体度,以提高安全性和运营效率.
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