Acoustic Emission and Fractal Precursory Characteristics of Coals with Different Bursting Liabilities in Loading Failure Process

Table 1

Typical rockburst accidents in nearly past 5 years (2016∼2020) of China.

Date	Accident coal mine	Accident fatalities	Bursting liability of coal or rock
2016/07/22	Dongbaowei Coal Mine in Heilongjiang Province	2	Weak bursting liability coal and floor, strong bursting liability roof
2016/09/25	Junde Coal Mine in Heilongjiang Province	5	Weak bursting liability coal, strong bursting liability floor
2017/11/11	Hongyang 3rd Coal Mine in Liaoning Province	10	Strong bursting liability coal, weak bursting liability floor
2018/10/20	Longyun Coal Mine in Shandong Province	21	Weak bursting liability coal and floor, strong bursting liability roof
2019/06/09	Longjiabao Coal Mine in Jilin Province	9	Weak bursting liability coal and roof
2019/08/02	Tangshan Mining Co., Ltd., in Hebei Province	7	Weak bursting liability coal and roof
2020/02/22	Xinjulong Energy Co., Ltd., in Shandong Province	4	Weak bursting liability coal, roof, and floor