Research on the Source Mechanism and Source Prevention and Control System of Deep Rock Burst

Table 1

Calculation of the energy transfer from the roof rock to the working face.

Name	Initial breakage		Period breakage
	Distance (m)	Energy transferred to the working face (J·m^−3)	Distance (m)	Energy transferred to the working face (J·m^−3)
Key layer 1	31.98	2.95 × 10^5	13.21	5.91 × 10^3
Key layer 2	39.07	1.36 × 10^4	15.95	0.17 × 10^3