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Geofluids
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2020
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Article
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Tab 3
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Research Article
Mining-Induced Stress-Fissure Field Evolution and the Disaster-Causing Mechanism in the High Gas Working Face of the Deep Hard Strata
Table 3
Technical parameters of deep-hole blasting in long hanging roof.
Roadway
Number
Hole depth (m)
Dip angle (°)
Hole diameter (mm)
Charge length (m)
Blocking length (m)
Tail entry
1#
27
34
94
21
6
2#
65
9
94
55
10
Head entry
3#
65
45
94
55
10
4#
37
65
94
30
7
5#
30
85
94
24
6