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PRESIDENT MOSES: I thank you, Mr. Emrick. Mr. Shubart would like to supplement your paper with another article. SECRETARY SHUBART: My paper really should not supplement Mr. Emrick's paper, because I secured some data from him, I knew Mr. Emrick had had a great deal of experience in shearing and I thought he could give you some useful data. (Here Mr. Shubart read the following:) "For the past two years, there has been considerable discussion among coal mining men concerning the advantages of a shearing cut in addition to the undercut, in mine work. We have had a number of requests for information on sheared coal. We were asked questions like these: What percentage increase in lump can be obtained from sheared coal? What has been the experience of mine men who have employed the shearing cut? Is the shearing cut a means of increasing the lump content? If so, is it increased to such an extent as to warrant the installation of shearing machines? Upon investigation it was found that no one could give us any definite information on the subject as no one had weighed separately the grades of coal produced from' the shearing cut. With a view of getting this information first-hand, the Goodman Manufacturing Company built up a shearing machine to be used in experimental work only. The officials of the Troy Coal Company were eager to share in the expense of obtaining this information, so that in May of this year we shipped to their mines our first type 319 shearing machine. The Troy Coal Company operates a mine at Troy, Illinois, in the No. 6 seam and produces about 275 tons daily. The coal seam averages five and one-half feet in thickness. Previous to the arrival of the shearing machine the coal was undercut six feet deep by a' Goodman Shortwall Machine. To break down the coal required two shots in the entries and three in the rooms. The percentage of lump measured over two-inch screens, averaged 58.2 per cent. The conditions of the mine were very favorable for obtaining accurate weights on the amount of lump and slack coal run over the shaker screens. The shearing machine easily cut the entire tonnage of the mine so that all coal dumped into the railroad cars had been produced from a shearing cut, in addition to an undercut. Accurate records were kept of the railroad weights and front this data the percentages of lump and slack were computed. During the month of June the percentage of lump produced over two-inch shaker screens was 69.9 per cent. This result demonstrated that the introduction of the shearing cut had increased the percentage of lump twenty per cent. The entries were driven ten feet wide and the rooms thirty feet wide The shearing cut was made near the center of the face in all places. A hole was drilled in each rib and the coal shot down with one-half the powder required when the places had been undercut only. The coal was broken down to the back of the cut so that very little pick work was necessary to load it out. The benefits derived from the shearing cut were as follows: 1. Increased percentage of lump, thus increasing the average price of coal per ton. 2. Preservation of a tender top due to the decreased amount of explosive used. 3. Facilitated handling of coal by the miner thus increasing the tonnage per man. 4. Eliminated coal yardage in entries and crosscuts of ten feet or less in width for the reason that the shearing cut provides a loose end from which to shoot the coal. This applies to the union fields only, as the non-union mines do not pay for coal yardage. Based on a price of $2.50 for lump coal and $1.25 for slack coal, the average price per ton was increased

Jan 1, 1926

Jan 1, 1986

To be held in Denver Probably in June. The correct dates will be announced later IF you have any suggestions for the program, send them to the Secretary without delay.

Jan 1, 1942

By Stanley C. Suboleski

Overview ? Ten minutes or ?the hook? ? Focus on Appalachia, productivity and production ? Message: ? Appalachian mining scene has fundamentally changed

Jan 1, 2007

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Jan 1, 1993

The next meeting of the Institute will probably be in May, 1930. At the almost unanimous vote of the membership, there will be only one meeting a year, and that will be in May or June.

Jan 1, 1929

Jan 1, 1982

The Role of Partnerships ?Industry history ?Companies were their own kingdoms ?MSHA and NIOSH were out of touch and focused on enforcement with no direction ?Labor and management were constantly at odds with each other

Jan 1, 2002

Jan 1, 1926

"Let us not think of our departed dead As caught and cumbered in these graves of earth; But think of death as of another birth, As a new Freedom for the wings outspread, A new adventure waiting on ahead, As a new joy of more ethereal mirth, As a new world with friends of nobler worth, Where all may taste a more immortal bread." FLOYD W. PARSONS N. CHRISTENSEN JOSEPH F. PETERS GEORGE B. PARKER ROBERT WILLIAMS B. F. DEVINNY

Jan 1, 1942

Jan 1, 1986

Jan 1, 1994

Albert M. Keenan, President, Thompson Creek Coal and Coke Corporation, Denver, Colorado, opened the third session of the Fifty-ninth Regular Meeting of the Rocky Mountain Coal Mining Institute at 9:30 a.m., and introduced the first speaker of the morning. Raphael J. Moses, Attorney, Colorado Water Conservation Board, Boulder, Colorado, spoke on "The Opportunity for Coal in Colorado River Basin Development." (For the printed text of Mr. Moses' paper see index.) Stephen F. Dunn, President, National Coal Association, Washington, D. C., was introduced by Mr. Keenan, and he addressed the Institute concerning "Coal and the Washington Scene."

Jan 1, 1963

[ACZ, Inc. Boliden-Allis CINCO (Coal Industry Consultants, Inc.) Coal Colowyo Coal Company Commercial Testing & Engineering Co. Crane & Hoist Sales, Inc. Cummins Power, Inc. Cummins Southwest, Inc. Cyprus Coal Company Energy Fuels Corporation Ford, Bacon & Davis Utah, Inc. T.J. Gundlach Machine Company Harnischfeger Corporation Hemscheidt Corp. GH Hensley Industries Honnen Equipment Company Jennmar Corporation Joy Technologies, Inc. K&P Sales Engineers, Inc. Kennametal, Inc. Kerr McGee Coal Corporation Neil F. Lampson, Inc. McLanahan Corporation National Mine Service Company NERCO Coal Corporation North American Coal Corporation Peabody Coal Company Pittsburg & Midway Coal Mining Co. Ramsey Technology, Inc. Roberts & Schaefer Company Rocky Mountain Machinery Company Santa Fe Pacific Coal Corporation Scandura, Inc. Sheraton Steamboat Southern Pacific Utah Power & Light Company Western Energy Company]

Jan 1, 1989

[Participating Scholarship Colleges and Universities 148 Andalex Resources, Inc 99 Big Sky Coal Company 118 Canyon Fuel Company, LLC 100 Coal Age 141 Commercial Testing & Engineering Company 103 Continental Conveyor & Equipment Co 104 Copper Mountain Resort 139 Cove Shoe Co., Inc 116, 117 Dakota Coal Company 105]

Jan 1, 2000

Jan 1, 1923

[Participating Scholarship Colleges and Universities 144 Andalex Resources, Inc 91 Behre Dolbear & Company, Inc 93 Canyon Fuel Company, LLC 92 Big Sky Coal Company 114 Commercial Testing & Engineering Company 96 Continental Conveyor & Equipment Co 97 Copper Mountain Resort 108 Cove Shoe Co., Inc 110, 111]

Jan 1, 1999

Jan 1, 1951

Jan 1, 1926

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Jan 1, 1996