The occurrence regularity of rock burst in Laohutai coal mine

With the deepening of coal mining, rock burst occurs violently in Laohutai coal mine. This article analyses the occurrence regularity of about 263 times of rock burst in the mine. It is shown that: ① The blasting is the main inducement of rock burst. ② The geologic factor is the weak rock bedding of the mine. ③ When the first coal bed is mined,the rock burst is the most frequent. ④ The area of 30m which is influenced by fault is a sudden change area in stress,and 90% of all rock burst frequencies take place in this area.