A Laser-Based Device for Work Site Stability Assessment

描述(申请人提供)：为减少采矿业因顶板冒落、井壁塌陷、采场坍塌、斜坡滑坡等造成的职业伤亡，提出了一种基于激光的声发射(AE)检测设备(第一阶段和第二阶段)，用于工作场所结构稳定性评估。这项应用研究和开发涉及矿工的安全，有助于确保矿工享有“安全和健康的工作条件”的权利(1970年“职业安全和健康法”)。这一新设备将利用激光超声、人工智能(AI)和传统声发射技术的创新，为煤矿工人提供独特的即时、实时的工作环境中岩石结构的稳定性评估，这在过去是无法实现的。这项研究还将产生一种独特的非接触式监测设备，用于声发射/微地震研究，这将在许多应用领域非常有用。第一阶段研究的主要目标是在实验室条件下演示用于稳定性评估的激光设备的概念，并为后续第二阶段研究中的进一步开发和优化构建原型装置。这一主要目标包括五个具体目标：1.样品准备，2.发展基于激光的声发射监测器，3.声发射数据收集和失效准则的制定，4.实验室演示，以及5.最终报告和第二阶段建议。

DESCRIPTION (provided by applicant): A laser-based acoustic emission (AE) detection device is proposed (Phase I & II) for work site structural stability assessment in order to reduce the occupational injuries and fatalities caused by roof falls, sidewall crumples, stop collapses, slope slides, etc., in the mining industry. This applied research and development addresses the miner's safety and contributes to ensuring the mineworker's right to "safe and healthful working conditions" (Occupational Safety and Health Act of 1970). This new device will take advantage of innovations in laser ultrasonic, artificial intelligence (AI) and conventional acoustic emission technology to provide mine workers with a unique instant, real time stability assessment of immediate rock structures in the working environment, which was not attainable in the past. This research will also result in a unique non-contact monitoring device for acoustic emission/microseismic studies, which will be very useful in many areas of application. The primary objective of the Phase I research is to demonstrate under laboratory conditions the concept of the laser device for stability assessment, and to construct a prototype setup for further development and optimization in the subsequent Phase II research. This primary objective consists of five specific aims: 1. Specimen preparation, 2. Development of laser-based AE monitor, 3. AE data collection and failure criteria development, 4. laboratory demonstration, and 5. final report and Phase II proposal.