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Jan 1, 1991

[ACC, Inc. Bucyrus-Erie Company CINCO (Coal Industry Consultants, Inc.) Coal Magazine Colowyo Coal Company Coors Ceramic Company Crane & Hoist Sales, Inc. Cummins Power. Inc. Cummins Southwest, Inc. Cyprus Coral Company Denver & Rio Grande Western Railroad Company Energy Fuels Corporation FMC Corp.- MHE Division Ford. Bacon & Davis Inc. T.J. Gundlach Machine Company Hemscheidt American Corp. GH Hensley Industries Honnen Equipment Company Jennmar Corporation Soy Technologies, Inc. K&P Sales Engineers, Inc. Kennametal, Inc. Kerr McGee Coal Corp. McLanahan Corporation National Mine Service Company Peabody coal Company Pitrsburg & Midway Coal Mining Co. Pyramid Parts, Div. American Alloy Ramsey Technology. Inc. Roberts & Schaefer Company Santa Fe Pacific Coal Corporation Scandura. Inc. Tamarron Resort TIC (The Industrial Company) Tribol Utah Power & Light Western Energy Company]

Jan 1, 1988

Jan 1, 1947

Jan 1, 1957

Jan 1, 1927

Jan 1, 1941

By Kelly A. Cosgrove

Jan 1, 2003

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Jan 1, 1991

Jan 1, 1948

Outline ? Overview ? Existing Operations ? Mine Planning ? Future Trends ? Market Impacts ? Conclusions

Jan 1, 2006

Jan 1, 1952

Amax Coal Inc. Colowyo Coal Company Continental Conveyor & Equipment Company Crane & Hoist Sales Cummins Southwest, Inc. Energy West Mining Company Paul J. Epley The Falkirk Mining Company Fleischli Oil Company T. J. Gundlach Machine Company Halbach & Braun Hemscheidt Corporation GH Hensley Ingersoll Rand Jennmar Corporation Joy Technologies K & P Sales Engineers, Inc. Kennametal, Inc. Kerr-McGee Coal Corporation L & H Welding McLanahan Corporation National Coal Association The North American Coal Corporation Northwestern Resources Company Peabody Western Coal Company Phillips Machine Service, Inc. Pincock, Allen & Holt The Pittsburg & Midway Coal Mining Co. Ramsey Technology, Inc. Roberts & Schaefer Co. Rust Tractor Company Salt River Project Schroeder Industries Smith, Barney, Shearson Snowmass Resort Association Southern Pacific Lines Stamler Corporation TerraMatrix TIC (The Industrial Company Wyoming, Inc.) Trapper Mining Inc. Wagner Equipment Company Western Energy Company Wheeler Machinery Company

Jan 1, 1993

By D. A. Stout

The Rouse Mine, belonging to the Colorado Fuel & Iron Company, earlier known as the Santa Clara Mine, is located at Rouse, Huerfano County, Colorado. Operations at this property started about the year 1899, after the old Rouse mine had been drowned out by a large flow of water coming from the strata underlying the Cameron seam. The present new Rouse mine was opened by a slope on what is familiarly known as the Walsen seam in the Walsenburg district. This slope has an average grade of 12 per cent bearing approximately, south 45 degrees west, and having at the present time a total length of 6300 feet. This seam has an average thickness at that property of five and one-half feet; however, there are sections of the mine where the thickness is from seven to eight feet. The mine has been developed. since the time it was opened on what is known as the Room and Pillar system ; water level entries have been driven right and left off the slope, and in some cases the rooms are driven directly up the pitch; and in other cases entries have been driven with rooms turned on water level courses. The first flow of water of which we have ally record was encountered in 1901 in what was called the "Second West Entry." This flow, however, was small, and did not require the installation of any large pump unit. From 1901 up until 1909 the flow increased normally as the field was developed. In January, 1909, the first large inflow occurred, coming from a break in the seventh west entry, making a total flow at that time of about 500 gallons per minute. This necessitated putting in larger pumps, and the first pump to be installed of the centrifugal type was a 600 gallon Worthington. By the year 1911 the water had increased, due to additional development, until it was found necessary to install an additional 600 gallon Worthington centrifugal type pump. In December, 1912, a break occurred in the eighth west entry, between the fourth and sixth cross entries, making 2000 gallons per minute. This flow decreased after a period of three weeks some 500 gallons, but on account of the quantity of water then being handled at the mine, and in view of the fact that we needed some reserve pumping equipment to take care of these flows, and additional 600-gallon Worthington centrifugal type pump was installed in June, 1913. An the latter part of 1914 a 250 gallon Reese roturbo was installed to take care of the water, which was being made in the lower workings of the slope. We found after the installation of the centrifugal pumps that the water decreased to a certain degree in the uppermost workings. This led us to believe that the field was being drained, more or less, and the head reduced ; however, our ideas in regard to this were again upset in December, 1915, when we encountered a flow in room 6 off the first cross entry on the ninth east entry. This flow was not as large as previous flows had been, but made 200 gallons per minute.

Jan 1, 1921

By James F. Howe

Modern civilization is centered around a small group of essential occupations, the three principal ones which are agriculture, mining and manufacturing. Agriculture might be called the most important of the three, as it has to do directly with the supply of food for the human race. Mining, however, is certainly next in importance, as it furnishes the supply of fuel and many of the raw materials used in manufacturing. Without mining, modern machinery and many industrial operations would be impossible. Mining takes advantage of the, natural resources in fuel and minerals that lie underneath the surface of mother earth, and while at times some of these metals are hard to find and mines come and go, mining must continue to increase. Mining is no longer a haphazard proposition but one calling for careful study and complete plans of operation for years to come. The shafts, power houses, rock dump crusher, concentrator, and other machinery must be located advantageously in order to enable owners to make a profit. Many tons of rock or mineral must be mined frequently to get one ton of concentrated metallic ore or metal itself. Economy in mining is just as essential as it is in manufacturing. The mining engineer of today is called upon to utilize every branch of engineering, and not only, is a wide: range of knowledge required, but ingenuity to meet the unusual conditions which are constantly arising from week to week. On account of the wide variety of information required by the mining engineer, some things with which he is in almost daily contact may be passed over with only a small amount of attention, provided everything is going well, in order that time and attention may be focused on what might be termed the more important features of mining operations. Because competition has become keener than ever, owing to overproduction at times of certain minerals, it becomes a matter of first, importance to understand as far as possible the factors which enter into the cost of production of any mineral which may be mined. In such times of overproduction, the high cost mine is forced to close down while the low cost mine may, if desired, be kept running constantly. In keeping a cost record, wire rope on account of its high first cost 19 coming into the lime light, and a comparison of records of one mine with another is now frequently made in order to see whether the rope service is satisfactory or not. Every rope maker, on the other hand, is interested in seeing that the rope which he produces gives the maximum possible return for the money invested. Modern mining owes much of its success to the use of wire rope for hoisting materials from beneath the surface of the ground. Deep mining would be impossible without the use of wire rope as a means of hoisting. A study, therefore, of rope problems in mining work and a discussion of the points which are beneficial to maximum life will enable the mining engineer, manager, or superintendent to keep his costs down to the minimum while at the same time he provides a suitable and sufficient safety factor for operations at all times. Mining might be defined as the extraction of coal, metallic ores, or minerals from below the surface of the ground. This definition does not cover what is known as, open pit operations or quarrying but covers the

Jan 1, 1922

Jan 1, 1923

Jan 1, 1928

Jan 1, 1963

By Bret K. Clayton

Jan 1, 2004

Jan 1, 1975

By S. W. Farnham

We have listened to many papers describing mechanical loaders, and systems of mining planned to increase their efficiency. We have become familiar with the various types and in a general way, their capacities and limitations. Messrs. F. E. Cash and E. H. Johnson in Bulletin 17 of the Carnegie Institute of Technology, subject Coal Mining Investigations, have a very complete review of the loading situation then. Mr. A. W. Dickinson, in a recent paper before this Institute, gave a later illustrated review of mechanical loaders. On page 28 of Cash & Johnson's paper is a list of loading machines to which might be added to bring the list down to date, the following: Under Digging and Loading Machines The Goodman Power Shovel Under Scraper Loaders The Goodman 436-G-3 125 H. P. three drum Scraper loader The Goodman 35 H. P. Entry loader and the Two Drum 125 H. P. Hoist built by Vulcan of Denver for scrapers Under Shaking Trough Conveyors The Eickhoff Conveyor The Link-Belt Conveyor The McCarty Duck-bill which is really a digging and loading element built to attach to the end of and operated by a reciprocating conveyor. The outstanding feature in this line of work in the past few years is the fact that a few very successful operations have been worked out on a large scale; the officers and staff in charge of this work have gone into details very thoroughly and altered and improved, in many cases, their mine equipment and mining methods, and by the exercise of persistent energy and intelligent effort, in the face of frequent difficulties and discouragements, they have attained results that are far ahead of the average loader operation. The coal mining industry owes much to these men for the pioneering and development of mechanical loading; their investigations in transport, shooting, shearing, snubbing, cleaning, and production costs, the results of which they have given freely and frequently to the public, are of great value. Foremost among the pioneers in this work are the Union Pacific Coal properties, the Quealy properties, the Sheridan Wyoming Coal Company and in the Central West, the Union Colliery Company of Illinois. On the other hand, in the great majority of installations, one loader, or possibly two or three loaders have been started in a given operation and through failure to make the proper effort to improve their transportation and work out the systems to utilize their loading machines, the loaders have not shown appreciable savings and in many cases, the installation has failed. It has been frequently stated in many meetings where loading has been discussed, that the idea of mechanical loading must first be sold not only to the operating staff but to the entire personnel of any company where installations are made. The problems involved in the successful application of this equipment are such that it requires enthusiastic and wholehearted teamwork on the part of everyone connected with the work and when difficulties arise, they must be ready to exercise initiative and try new ways oftentimes of overcoming impediments. The closest attention now is given to the question of economics how much will a loader reduce the cost of coal in any particular situation? Without fear of successful contradiction, I believe that experience up to date has unquestionably shown that where the shovel type of loader can be properly used, it produces in wide work, the cheapest coal of any loading device yet brought onto the market. Naturally there is a considerable difference between the results from different makes of shovels.

Jan 1, 1926