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关于类似性模拟实验的研究矿山压力在表面沟工作面的外观基于BOTDA的工作面

Dingding Zhang^1,2, Zhiming Huang¹, Zhe Ma¹

¹College of Energy Engineering, Xi'an University of Science and Technology, Xi'an 710054, China.

Sensors (Basel, Switzerland)

|November 25, 2023

概括

光纤传感器在山谷地形下的浅层煤炭开采中监测山的偏移和工作面压力. 光纤的突然应变增加表明地面压力强,有助于矿山安全.

科学领域:

矿山工程矿山工程矿山工程
地质技术工程地质技术工程
应用物理应用物理

背景情况:

在山谷地形下的浅层煤层采矿对预测山脉偏移和工作面压力提出了独特的挑战.
了解山脉不稳定的前体信号对于防止灾难性故障至关重要.

研究的目的:

在山谷地形下的浅层煤炭开采中调查山山偏斜特征和工作面压力规律.
应用Brillouin光学时域分析 (BOTDA) 和数字图像相关性 (DIC) 来监测岩石质量行为.
开发一种光纤特性方法,用于识别强地面压力事件.

主要方法:

一个物理相似性模型 (5.0 × 0.2 × 1.33 m) 被构建以模拟浅煤矿开采条件.
用Brillouin光学时间域分析 (BOTDA) 来通过水平光纤监测内部岩石应变.
数字图像相关性 (DIC) 技术测量了表面应变场,用于全面分析.

主要成果:

在山脉结构不稳定的不同阶段分析了水平光纤应变规律.
确定了光纤应变特征,这些特征在山区不稳定之前存在.
提出并验证了一种光纤方法来描述工作面压力,将应变峰值与强地面压力事件相关联.

结论:

这项研究成功地将光纤应变模式与山峰偏移和工作面压力相关联.
光纤张力峰值突然增加表明地面压力强,通过地下测量来验证.
这些发现支持光纤传感技术在矿山工程中的更广泛应用,以提高安全性和监控.

关键词:

波特达 (Botda) 是一个强大的地面压力的歧视.光纤频率转移变化的变化不稳定性的前体特征.类似的物理模型实验.

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