displaying 171 - 180 results in total 331
U.S. Department of the Interior, Bureau of Mines
view article (1.0)Underground Mine Communications (In Four Parts). Part 3. Haulage Systems.Bureau of Mines, Philadelphia, PAIC 8744IC 8744
1977
57 p.U.S. Department of the Interior, Bureau of Mines
view article (1.0)Underground Mine Communications (In Four Parts). Part 2. Paging Systems.Bureau of Mines, Philadelphia, PAIC 8743IC 8743
1977
39 p.U.S. Department of the Interior, Bureau of Mines
view article (1.0)Underground Mine Communications (In Four Parts). Part 1. Mine Telephone Systems.Bureau of Mines, Philadelphia, PAIC 8742IC 8742
1977
63 p.McCulloch, C. M.; Diamond, W. P.; Bench, B. M.; Deul, M.
view article (1.0)Selected Geologic Factors Affecting Mining of the Pittsburgh Coalbed.Bureau of Mines, Philadelphia, PARI 8093RI 8093
1975
77 p.Maksimovic, S. D.; Elder, C. H.; Kissell, F. N.
view article (1.0)Hydraulic Stimulation of a Surface Borehole for Gob Degasification.Bureau of Mines, Pittsburgh, PARI 8228RI 8228
1977
20 p.Diamond, W. P.; Oyler, D. C.; Fields, H. H.
view article (1.0)Directionally Controlled Drilling to Horizontally Intercept Selected Strata, Upper Freeport Coalbed, Greene County, PA.Bureau of Mines, Pittsburgh, PARI 8231RI 8231
1977
24 p.Moebs, N. N.
view article (1.0)Roof Rock Structures and Related Roof Support Problems in the Pittsburgh Coalbed of Southwestern Pennsylvania.Bureau of Mines, Pittsburgh, PARI 8230RI 8230
1977
33 p.Irani, M. C.; Jansky, J. H.; Jeran, P. W.; Hassett, G. L.
view article (1.0)Methane Emission From U.S. Coal Mines in 1975, A Survey. A Supplement to Information Circulars 8558 and 8659.Bureau of Mines, Pittsburgh, PAIC 8733IC 8733
1977
58 p.Sapko, M. J.; Furno, A. L.; Kuchta, J. M.
view article (1.0)Quenching Methane-Air Ignitions With Water Sprays.Bureau of Mines, Pittsburgh, PARI 8214RI 8214
1977
16 p.Bruce, R. A.
view article (1.0)Remote Transducer Based on Coherent Mixing of Backscattered Laser Light.Bureau of Mines, Pittsburgh, PARI 8220RI 8220
1977
16 p.