Assessment of Fractures in Excavation Damaged Zone around Roadways of an Iron Mine Using Optical Televiewer Detecting Method

Table 2

Summary of the 23 test areas.

Hole number	Location of test area	Location of borehole	Rock type	Rock mass quality
1	20^# roadway of −236 m sublevel	Roof	Orebody of Xiaoxingshan	IV
2	Haulage drift at 2^# roadway of −236 m sublevel	Roof	Footwall of Daxingshan	IV
3	Haulage drift at 6^# roadway of −236 m sublevel	Roof	Orebody of Daxingshan	III
4	Haulage drift at 11^# roadway of −236 m sublevel	Roof	Footwall of Daxingshan	IV
5	4^# roadway of −236 m sublevel	Roof	Orebody of Daxingshan	II
6	7^# roadway of −236 m sublevel	Roof	Orebody of Daxingshan	II
7	9^# roadway of −236 m sublevel	Roof	Hanging wall of Daxingshan	III
8	26^# roadway of −236 m sublevel	Roof	Orebody of Xiaoxingshan	II
9	26^# roadway of −236 m sublevel	Roof	Orebody of Xiaoxingshan	IV
10	29^# roadway of −236 m sublevel	Roof	Orebody of Xiaoxingshan	IV
11	Haulage drift of −236 m sublevel	Roof	Footwall of Xiaoxingshan	IV
12	Haulage drift of −236 m sublevel	Roof	Footwall of Xiaoxingshan	III
13	Haulage drift of −236 m sublevel	Roof	Footwall of Xiaoxingshan	IV
14	15^# roadway of −218 m sublevel	Roof	Orebody of 3^# mining area	III
15	16^# roadway of −218 m sublevel	Roof	Orebody of 3^# mining area	III
16	17^# roadway of −218 m sublevel	Roof	Footwall of 3^# mining area	IV
17	11^# roadway of −218 m sublevel	Roof	Hanging wall of 3^# mining area	IV
18	2^# roadway of −218 m sublevel	Sidewall	Orebody of Daxingshan	IV
19	5^# roadway of −218 m sublevel	Sidewall	Orebody of Daxingshan	IV
20	15^# roadway of −218 m sublevel	Sidewall	Footwall of 3^# mining area	IV
21	19^# roadway of −218 m sublevel	Sidewall	Orebody of Xiaoxingshan	IV
22	26^# roadway of −218 m sublevel	Sidewall	Orebody of Xiaoxingshan	II
23	29^# roadway of −218 m sublevel	Sidewall	Orebody of Xiaoxingshan	IV