关于开采煤矿中水性介质的喷气机制和喷气效应的研究
Xiaohua Ding1, Xin Liu1, Zhongchen Ao2
1School of Mines, China University of Mining and Technology, Xuzhou, 221116, China.
Scientific reports
|November 6, 2023
概括
用水为媒介的喷射显著提高了煤矿开采效率,并减少了尘埃污染. 与传统的干喷相比,这种方法提高了应力转移和能源效率,显示出有前途的工程应用.
科学领域:
- 采矿工程 采矿工程 采矿工程
- 环境科学 环境科学
- 机械工程 机械工程
背景情况:
- 传统的地表煤矿喷气方法效率低,并且由于灰尘而造成环境污染.
- 现有的喷射技术往往会产生低于最佳的结果,影响整体运营生产率和安全.
研究的目的:
- 为了研究水的机械特性作为喷气介质在地表煤矿开采.
- 评估水媒爆料在提高效率和减少尘埃排放方面的有效性.
- 为了比较水媒爆与传统的干爆方法.
主要方法:
- 分析水媒介的机械特性,包括转移效应,转导效应和泡脉冲.
- 使用TrueGrid/LS-DYNA进行有限元分析以模拟动态喷射过程并分析应力分布.
- 在实际的矿山条件下进行实地测试,以测量降尘率,并使用AHP-fuzzy方法进行全面评估.
主要成果:
- 水介质喷射显示最大主应力是空气介质的1.53倍,峰值能量转移高达空气介质的2.73倍.
- 模拟表明,洞和斜坡周围的最大主应力增加,含水量增加.
- 实地测试表明,水媒爆的粉尘减少率为75%,与干爆相比,总体得分更高.
结论:
- 与传统的干燥喷射相比,水媒介喷射提供了优越的应力转移和能源效率.
- 该方法显著减少了尘埃污染,解决了地表煤炭开采中一个关键的环境问题.
- 用水为媒介的喷气为改善煤炭开采操作提供了一个可行的和有前途的工程应用.
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