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Measurement of pressures on rock pillars in underground mines. Part I / by Leonard Obert.

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Bibliographic Details
Online Access:	Search for the full-text version of this title in HathiTrust
Main Author:	Obert, Leonard, 1906-
Corporate Author:	United States. Bureau of Mines
Format:	Government Document Book
Language:	English
Published:	Washington, D.C. : U.S. Dept. of the Interior, Bureau of Mines, 1939.
Series:	Report of investigations (United States. Bureau of Mines) ; 3444.
Subjects:	Rock pressure. Rock mechanics. Mine roof control.

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Call Number:	I 28.23:3425-3449
I 28.23:3425-3449	Available Place a Hold Contents The following works are all found in the book indicated by the call number above. Measurement of pressures on rock pillars in underground mines. Part I / by Leonard Ob... Progress reports--Metallurgical Division. 28, Analytical studies : volumetric determi... Carbonizing properties of a subbituminous coal from Puritan Mine, Dacono, Weld County... Annual report of the nonmetals division, fiscal year 1938 / by Oliver C. Ralston [and... House movement caused by ground vibrations / by J.R. Thoenen and S.L. Windes. Mount Weather testing adit : progress report 1 / by McHenry Mosier and Wing G. Agnew. Bit gage v. drilling speed / McHenry Mosier and Wing G. Agnew. Investigations during 1937 of combustibles in manholes in Boston, Mass. / by G.W. Jon... Progress reports--Metallurgical Division. 31, Ore-dressing studies : flotation of Sou... Explosion and fire hazards of combustible anesthetics / by G.W. Jones. Effect of acid treatment upon the ultimate recovery of oil from some limestone fields... Accidents in the petroleum industry of Oklahoma in 1937 summarized and compared with... Reclamation of stripped coal land / by Albert L. Toenges. Analyses of crude oils from some fields of Oklahoma / by O.C. Blade. Survey of fuel consumption at refineries in 1937 / by G.R. Hopkins. Classification and tabling of table middlings at the Colta Coal Washery, Flat Creek,... Some asphalts from Oregon Basin (Wyoming) crude oil / by K.E. Stanfield. A washability study of the Woodstock coal bed at Klondyke mine, West Blocton, Ala. /... Progress reports--Metallurgical Division. 29, Silver-recovery studies : some factors... Cooperative fuel research motor-gasoline survey : summer 1938 / compiled by E.C. Lane... Some tests of acid-resistant pipe / by R.D. Leitch. Progress reports--Metallurgical Division. 30, Electrometallurgical investigations : r... Primary crushing : summary of field tests / by Mark Sheppard. Typical oil-field brine-conditioning systems : preparing brine for subsurface injecti...