Research on mechanical damage-energy evolution characteristics of coal based on digital image measurement technology

Abstract

This study investigates the mechanical damage-energy evolution characteristics of coal using digital image measurement technology. Traditional measurement methods, such as strain gauges and extensometers, often suffer from limitations and inaccuracies in measuring coal deformation and damage. In contrast, digital image measurement technology offers a non-contact and non-interfering approach, providing high precision and real-time monitoring of coal deformation and strain changes. The study utilizes a tri-axial fluid–solid coupling device and non-contact digital image processing technology to measure the deformation of coal samples under different confining pressures. By analyzing the total input energy, dissipative energy, and releasable strain energy of coal, the research sheds light on the energy distribution and transformation during coal failure. The advantages of digital image measurement technology over traditional methods are highlighted, including its high precision, real-time monitoring capabilities, non-disturbing measurement approach, and cost-effectiveness. These advantages enhance the accuracy and efficiency of testing and monitoring coal samples, leading to improved coal mining practices and energy production processes. Overall, this study contributes to a better understanding of the mechanical damage-energy evolution characteristics of coal. The insights gained from digital image measurement technology provide valuable information for the prediction and prevention of geological disasters, the analysis of stability in coal mining operations, and the development of improved safety protocols. Further research is encouraged to explore additional factors and mechanisms that may influence coal damage and energy evolution, ensuring a comprehensive understanding of coal behavior.