一项关于化学溶液和煤炭压力的协同损害的实验研究
Yaoyu Shi1,2, Xiangchun Li3,4, Xiaowei Li3
1School of Emergency Management and Safety Engineering, China University of Mining & Technology, Beijing, 100083, People's Republic of China. syy1996a@163.com.
Scientific reports
|January 23, 2025
概括
化学溶液显著削弱了煤炭,降低了其强度并改变了孔隙结构. 性溶液扩大纳米孔,而酸性溶液增加脆性,影响采矿安全.
科学领域:
- 地质技术工程 地质技术工程
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 煤炭开采业务面临化学诱导退化的风险.
- 了解化学溶液与煤炭力学之间的相互作用对于安全至关重要.
研究的目的:
- 研究不同pH值的化学溶液对煤炭微观宏观损伤的影响.
- 开发一种化学腐蚀和压力对煤炭的影响的组合模型.
主要方法:
- 单轴压缩测试是在用NaOH,HCl和蒸水处理的煤样本上进行的.
- 使用小角度X射线散射 (SAXS) 来分析孔隙结构的变化.
- 开发了一种修改后的韦布尔构成模型,其中包含了化学溶液腐蚀应力合因子.
主要成果:
- 在NaOH,HCl和蒸水中浸泡,使单轴压力分别降低了39.19%,47.26%和24.39%.
- 弹性模量同样下降,证实了煤炭的减弱.
- 性溶液扩大了纳米孔;酸性溶液通过溶解矿物质增加了脆性.
结论:
- 化学处理大大降低了煤炭的机械性能.
- 开发的模型准确地预测了在化学和机械应力组合下煤炭的行为.
- 这些发现支持加强煤矿环境中的防灾和稳定控制.
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