Research on Structural Characteristics of Dynamic Nuclear Zone in Dynamic System of Coal and Rock

Table 4

Monitoring effect of different types of hole.

Drill number	Maximum impact area (radius) (m)	Energy inversion results (MJ)	Calculation results of dynamic nuclear zone radius (m)	Average value of the radius (m)
1#	2.0	0.60∼1.20	1.72∼2.17	1.95
2#
3#
4#	2.6	1.31∼2.62	2.24∼2.82	2.53
5#
6#
7#	1.6	0.30∼0.61	1.37∼1.73	1.55
8#
9#