Use of roof bolting to enlarge a longwall rise heading with a view to introducing a high shield support (in Polish)

Keyword(s):  
1983 ◽  
Vol 19 (6) ◽  
pp. 455-458
Author(s):  
N. S. Bulychev ◽  
D. I. Kolin
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Ugol ◽  
2018 ◽  
pp. 21-25
Author(s):  
A.A. Dudin ◽  
◽  
E.V. Vakhrushev ◽  
S.Е. Zlobin ◽  
A.S. Prokofiev ◽  
...  
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