Characteristics and prevention and control status quo of rock burst in Northeastern Mining Area of China

The three northeastern provinces are important coal production bases in China. As the development of resource mining enters in the middle and later stages, the mining depth increases, and the accidents of rock burst happen frequently. The prevention and control of rock burst are facing great challenges. Through a combination of questionnaire surveys and field investigations, this paper analyzed the current situation, mine characteristics, occurrence characteristics, occurrence types, monitoring and early warning means, prevention and control methods of rock burst in the three northeastern provinces of China, and analyzed the causes of typical rock burst accidents in recent years. The common problems reported by the mine and the supervision department were collected and summarized in the investigation and suggestions were given. The results show that the occurrence of rock bursts in the northeastern mining area can be divided into four stages: initial occurrence, gradual increase, concentrated eruption and relative stableness. There are 20 rock burst mines in northeastern mining area, which are characterized by deep coal seam depth, complex occurrence conditions, thick and hard roof and high in-situ stress level. The rock burst shows the common characteristics of large buried depth, coal rock with impact tendency and obvious geological structure participation. The main causes are hard and thick overlying roof, unreasonable mining layout and activation of geological structure. Typical rock burst accidents in northeastern mining areas in recent years can be divided into deep dynamic and static load superposition types and deep high static load types. The prevention and control of rock burst in northeastern mining area has been carried out earlier, and the monitoring and early warning methods are more comprehensive and multiple devices work simultaneously, but the actual application efficiency is not high. The existing prevention and control methods focus on partial relief, and the regional prevention and implementation level needs to be further improved.