基于综合能量指数的煤岩复合动力灾害预警新方法

New Method of Coal and Rock Compound Dynamic Disaster Warning Based on Comprehensive Energy Index

高效快捷利用煤矿监测技术是预防煤岩复合动力灾害的首选方法,实时反馈煤岩体自身能量变化是监测灾害的关键。从煤岩统一能量方程可综合分析复合动力灾害发生及判别类型,且具有间接预警的作用。结合煤矿现场常用的地球物理监测方法,对比得出微震技术可实时动态监测矿井内能量变化,提高微震监测灾害显现的准确度是保障井下安全生产的关键。据微震能量与5个震源力学参量相关性强弱分为两类,优先选取危险性较高的一组作为预警标准,修订优化了综合能量指数法。以山西某矿8003巷道工作面为例,选取5个动力灾害发生预测点,改进后的预测结果与人工实地监测的符合率接近80%。该研究为煤岩体的稳定性评估和复合动力灾害预测提供了重要的技术指导。

Efficient and quick use of coal mine monitoring technology is the first choice to prevent coal rock complex dynamic disaster,real-time feedback of coal rock energy change is the key to monitoring disaster.The unified energy equation of coal and rock can be used to comprehensively analyze the occurrence and classification of complex dynamic disasters,and it has the function of indirect early warning.Combining with the geophysical monitoring methods commonly used in coal mine,it is concluded that microseismic technology can dynamically monitor the energy change in the mine in real time,and improving the accuracy of microseismic disaster monitoring is the key to ensure the safety of underground production.According to the strength of the correlation between the microseismic energy and the mechanical parameters of the five focal sources,it is divided into two categories,and the group with higher risk is selected as the early warning standard.Taking the 8003 working face of a mine in Shanxi province as an example,five prediction points of dynamic disaster occurrence were selected,and the coincidence rate between the improved prediction results and the artificial field monitoring was close to 80%.This study provides important technical guidance for the stability assessment of coal and rock mass and the prediction of complex dynamic disaster.