Estimation of Rock Burst Grades Using Rock Mass Strength

Table 17

Comparison of estimation results.

Rock burst estimation from [29] and [34]						CHEGI criterion		Modified criterion			Actual rock burst grades
Sr. no	Chainage (km)	Overburden (m)			Rock burst grade		Rock burst grade	GSI		Rock burst grade
1	09 + 700.00	1200	1.49	1.80	Heavy	1.49	Strong	47	0.051	Strong	Heavy
2	09 + 675.30	1245	1.47	1.83	Heavy	1.47	Strong	40	0.059	Strong	Heavy
3	09 + 622.66	1380	2.56	0.86	Heavy	2.56	Medium	49	0.11	Medium	Slight
4	07 + 970.73	1900	1.49	1.60	Heavy	1.49	Strong	63	0.171	Slight	Slight
5	07 + 959.89	1900	1.30	1.83	Heavy	1.30	Strong	62	0.133	Medium	Slight
6	07 + 941.71	1900	1.42	1.68	Heavy	1.42	Strong	63	0.163	Medium	Slight
7	07 + 937.23	1900	1.41	1.70	Heavy	1.41	Strong	62	0.150	Medium	Slight
8	07 + 926.18	1950	0.99	2.42	Heavy	0.99	Violent	64	0.103	Medium	Slight
9	07 + 915.57	1950	1.34	1.78	Heavy	1.34	Strong	64	0.159	Medium	Slight
10	07 + 910.39	1950	1.56	1.53	Heavy	1.56	Strong	65	0.204	Slight	Slight
11	07 + 907.12	1950	1.40	1.71	Heavy	1.40	Strong	64	0.168	Slight	Slight
12	07 + 889.00	1950	0.84	2.84	Heavy	0.84	Violent	64	0.106	Medium	Slight