Abstract
Deep rock burst accidents occur frequently and become increasingly serious. Further improving the effectiveness and accuracy of the prevention and control of rock burst, ensuring the safe and efficient production of mines, clarifying the basic causes of disasters, and refining the type of deep rock burst are the most important key links. Aiming at the problems such as unclear incentives and types and the lack of effective and targeted prevention measures of deep rock burst, taking Xin’an Mine as the research background, based on the energy theory, the coal and rock mass multisource energy unified equation was established to analyze coal and rock mass instability mechanism. According to the different degrees of participation of various factors, the types of deep rock burst are determined as three categories and four types, and the corresponding judgment criteria are proposed. The precise prevention and control system for the source of rock burst with Xin’an characteristics is proposed, successfully applied to the 8101 working face, which not only guarantees the safe production of the working face, but also achieves good economic benefits. The research results lay the foundation for improving the accuracy and precision of the prevention and control of deep rock burst and provide theoretical guidance for the safe and efficient mining of the mine.
Highlights
In recent years, safe production situation of coal mine in China has improved significantly
Compared with other countries with developed coal mine industries, coal mine safety work still needs to be strengthened in China, especially water hazards and rock bursts
Jiang et al [5] classified the impact risk and type of surrounding rock according to the surrounding rock structure under external stress and the impact tendency of coal rock mass
Summary
Safe production situation of coal mine in China has improved significantly. E key factor to clarify the “source” mechanism lies in the quantitative analysis of the energy characteristics of the evolution process in deep mining It can provide a scientific basis for the classification of deep rock burst types and the selection of targeted prevention and control measures. When Ed is greater than Emin and much greater than Em (according to Professor Zheng’s research, the difference is at least 1 order of magnitude) [20], the “source” energy for the occurrence of deep rock burst comes from the roof fracture, which is called the roof-dominant type and can be expressed as. In order to improve the accuracy of early warning of deep rock burst disasters, comprehensive judgments are made using working face monitoring (microseismic monitoring, electromagnetic radiation monitoring), local monitoring (mining stress monitoring), and point monitoring (drilling chip method) for effective control.
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