Mechanism of Vibration Energy Action on Dynamic Instability of Shock-Type Rockburst Carrier System

Table 1

Calculation process and results.

No.	Mine name	Dongtan Coal Mine	Hongyang No.3 Coal Mine	Zhaolou Coal Mine
1	Rockburst time	20 : 26 : 03, February 26, 2015	2 : 26 : 39, November 11, 2017	2 : 49 : 33, July 29, 2015
2	Rockburst position	Working face 43Upper13	Working face 702	Working face1305
3	Site conditions	Coal spalling occurred in the 300–161 mm of tailentry in the working face	218.3 m in front of the coal wall of the roadway in the working face was full of coal and rock	The range of 45 m along the two sides of tailentry was moved to 3 m, and the floor heave within 40 m was between 0.5 and 1m
4	Static load energy of rockburst behavior area/J	1.22 × 10^7	4.21 × 10^7	7.96 × 10^7
5	Magnitude of mining earthquake	2.02	2.4	2.3
6	Mine earthquake energy/J	2.20 × 10^6	2.61 × 10^6	2.51 × 10^6
7	Distance between earthquake source and rockburst source/m	90.15	55.72	76.43
8	Seismic energy attenuation index η	−0.01	−0.01	−0.01
9	Energy of rockburst source under mine earthquake action/J	8.93 × 10^5	1.50 × 10^6	1.17 × 10^6
10	α = UDZ/UJZ	0.0734	0.0356	0.0597