Use of roof bolting to enlarge a longwall rise heading with a view to introducing a high shield support (in Polish)
1980 ◽
Vol 17
(1)
◽
pp. A9
Keyword(s):
2016 ◽
Vol 3
(4)
◽
pp. 370-378
◽
2007 ◽
Vol 121
(5)
◽
pp. 3042-3042
1977 ◽
Vol 14
(2)
◽
pp. 30
1987 ◽
Vol 24
(6)
◽
pp. 247