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通过利用通风类型"Y"来控制工作面上的气体溢出,基于部侧入口保持的研究
Xihua Zhou1,2, Zehao Jing3,4, Yanchang Li1,2
1College of Safety Science and Engineering, Liaoning Technical University, Huludao, 125000, Liaoning, China.
Scientific reports
|June 6, 2023
概括
这项研究使用CFD模拟分析了口侧入口保持期间"Y"型通风中的空气泄漏情况. 优化的气体提取方法有效控制了气体度,确保了安全的采矿操作.
科学领域:
- 采矿工程 采矿工程 采矿工程
- 计算流体动力学的流体动力学.
- 通风系统的通风系统
背景情况:
- 侧入口保持与屋顶切割和减压是矿山稳定性的关键.
- 了解空气泄漏特征对于有效的通风和气体控制在采矿操作中至关重要.
- 高度的气体 (GC) 在goaf构成重要的安全风险在煤矿开采过程中.
研究的目的:
- 在"Y"型通风系统中分析空气泄漏模式.
- 为了研究口侧入口保持长度和空气泄漏体积之间的关系.
- 确定最佳的气体开采策略,以控制开采区的气体积累.
主要方法:
- 计算流体动力学 (CFD) 模拟被用来建模"Y"型通风.
- 在达煤矿工作面 (WF) 的测量参数被用于模拟.
- 在各种条件下模拟了气体度和空气泄漏,包括不同的气体提取方法.
主要成果:
- 空气泄漏从口侧入口保持器流向口,空气压力最低 (1.12Pa) 在WF的上角.
- 空气泄漏量与口侧入口保持长度正相关,峰值为247 m3/min.
- 使用埋藏管道 (深度4.0米,直径400毫米) 的优化气体提取将上角GC降低到0.37%.
结论:
- 屋顶的切割和压力减轻会产生一个开放的洞口,影响空气泄漏的动态.
- 具体的天然气开采策略,包括高层钻井和有针对性的系统,有效地解决了气体过量问题.
- 该研究为控制天然气过度排放和确保矿山安全生产提供了理论基础.
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