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Articles 4111 - 4140 of 4559
Full-Text Articles in Engineering
A Graphic Method For Determining Pressure Losses Due To Air Friction In Mine Airways, Robert F. Bruzewski
A Graphic Method For Determining Pressure Losses Due To Air Friction In Mine Airways, Robert F. Bruzewski
Masters Theses
"One of the most important factors that influence the selection of a fan or blower for circulating a desired quantity of air through mine workings is the total pressure that is required to overcome the resistance of the airways. Ordinarily, the major portion of this resistance is that caused by friction of the moving air on the surface of the airways. The pressure that is required to overcome this frictional resistance is calculated by means of the friction formula"--Introduction, page 1.
The Barite Industry In The United States, James Byron Chaney
The Barite Industry In The United States, James Byron Chaney
Masters Theses
"Within the past few years, barite has become one of the most important non-metallic substance mined in the United States, as expressed by the large increase in production since 1943. The purpose of this treatise is to combine in a single volume important information concerning the geographical distribution, geology, mining methods, milling or beneficiation methods, production and utilization of barite in the United States. A large number of references has been used in preparing this treatment. The information has, as far as possible, been brought up-to-date. It is thought by the writer that the paper will present to the reader …
The Influence Of Grade Strength On The Efficiency Of Gelatin Dynamite, Kenneth George Ackermann
The Influence Of Grade Strength On The Efficiency Of Gelatin Dynamite, Kenneth George Ackermann
Masters Theses
"This study of the relative effectiveness of different grade-strengths of Special Gelatin dynamite in dolomitic limestone was conducted at the Experimental Mine of the Missouri School of Mines and Metallurgy, Rolla, Missouri"--Introduction, page 1.
A Comparative Study Of Some Rock Drill Bits, Paul Louis Terrasson
A Comparative Study Of Some Rock Drill Bits, Paul Louis Terrasson
Masters Theses
"This paper describes a comparative study which was made of the wear and efficiency of different types of rock-drill bits when used under various drilling conditions...The four types of experiments which were carried out had the following purposes: 1. Determine the influence of the size of the bit. 2. Determine the influence of the design of the bit. 3. Determine the influence of the type of hammer. 4. Compare the performances of steel and tungsten carbide bits in limestone and in granite"--Introduction, page 1.
Graphical Cost Analysis, Pranlal Girdharlal Sheth
Graphical Cost Analysis, Pranlal Girdharlal Sheth
Masters Theses
"This study made in the present work is an attempt to use the graphical methods to analyse the various cost functions of mineral production, viz., cost of labor, and materials (explosives, supplies, etc.) and to investigate their behavior with regard to the production of ore. Graphs and charts show, in a pictorial way, the relative magnitudes of changes in the factors of production that take place with the process of time. Besides being a visual comparison of the various series plotted, the graph develops and build analytical thinking and permits one to obtain the proper perspective. Today, engineers, in constantly …
Dust Control In Mining Industry And Some Aspects Of Silicosis, Mathuramuthoo Subramanyam
Dust Control In Mining Industry And Some Aspects Of Silicosis, Mathuramuthoo Subramanyam
Masters Theses
"The deleterious effect on human beings of dust in mine air is well-known. It is the duty of engineers, therefore, to take measures to eliminate it. It is now definitely established that of all the various types of dust encountered in mine air, silica dust is the most harmful. This dust, if inhaled over a period of time, causes the disease, silicosis, which in most countries is compensated for as a physical disability. The prevention of alleviation of this scourge is analyzed in three broad aspects: 1. If the mine air is as clean as outside atmospheric air, silicosis will …
A Study Of The Ventilation Of The Hiawatha Mine, Menominee Iron Range, Michigan, Thomas Alan O'Hara
A Study Of The Ventilation Of The Hiawatha Mine, Menominee Iron Range, Michigan, Thomas Alan O'Hara
Masters Theses
"Mine operators in the Menominee iron range have become aware of the need for adequate ventilation to reduce the amount of dangerous dust in the air. Dust-excluding respirators and water sprays are used but it is apparent that the prevalence of diseases caused by dust will be appreciably reduced only if an adequate amount of fresh air reaches the working places. During the past five years the necessity for direct control of the underground working environment has become particularly urgent. The increase in production rate, with two-shift and three-shift operation replacing the single shift, has complicated the problem of dealing …
The Influence Of Cartridge Diameter On The Effectiveness Of Dynamite, Charles Harding Noren
The Influence Of Cartridge Diameter On The Effectiveness Of Dynamite, Charles Harding Noren
Masters Theses
"For many years the manufacturers of explosives have attempted to show the advantages of using dynamite of a cartridge diameter of at least 1-1/8 inches. Tests by the manufacturers and by the United States Bureau of Mines hare definitely shown that the dynamites prepared in larger diameter cartridges have several advantages: They are more sensitive to detonation; they detonate at a higher velocity; they are resistant to water; they are safer to use; and they are more stable than dynamites made in smaller diameter cartridges. In spite of these advantages listed, several large consumers still insist on smaller diameter cartridges. …
The Effect Of Temperature On Mine Rocks, James Wilson Snider
The Effect Of Temperature On Mine Rocks, James Wilson Snider
Masters Theses
"The problem of this investigation involves the determination of the coefficients of thermal expansion of mine rocks, and the relationship of porosity, permeability, and consecutive temperature changes to the permanent elongation of those rocks. One of the major problems in mining today is that of the analysis of the action of exposed mine rock under changes of temperature. The immediate cause of a fall of ground in a mining excavation is due to the fact that some part of the mass that falls has been subjected to a stress beyond the strength of the rock. The question arises as to …
The Park City Consolidated Mine Madison County, Missouri, Charles Donald Geiger
The Park City Consolidated Mine Madison County, Missouri, Charles Donald Geiger
Masters Theses
"The purpose of this study is the application of the principles of mining geology to a search for additional ore in one of Missouri's lead mines and to provide in the literature a general analysis of the type of lead deposit found in Southeast Missouri whereby future prospecting and development work on similar deposits may be more efficiently carried on. The study consists of a thorough consideration of the geology and operation of the mine being worked by the Park City Consolidated Mines Company, Missouri Division, at Fredericktown, Madison County, Missouri. The field work was conducted during the months of …
The Effect Of Rope Speed And Moisture On Mine Scrapers, Ronald L. Carmichael
The Effect Of Rope Speed And Moisture On Mine Scrapers, Ronald L. Carmichael
Masters Theses
"During recent years the use of power drawn scrapers, sometimes called "slushing", for the transfer of ore and waste rock has become standard practice in many mining operations. Scraper types have been developed to meet various operating conditions by trial and error methods and by practical research. The study of scraper efficiency has been confined in the past mainly to power consumption. A detailed study of the effect of rope speed and moisture content of the material being moved on scraping efficiency, under controlled conditions, has not been noted in a review of the literature. The author feels that such …
Performance Study Of Mechanical Loading Machines In Coal Mining Practice, Kor Uyetake
Performance Study Of Mechanical Loading Machines In Coal Mining Practice, Kor Uyetake
Masters Theses
"In the transition from hand-loading methods in coal mining to mechanical loading methods various types of equipment have been developed to do the same job. Among the coal mining operators and among miners in the coal fields, various equipment preferences have developed. This produces a sharp difference of opinion. emotional statements of such ideas based upon personal likings do not contribute materially to coal mining progress - it merely serves to confuse the issue. The author feels that the opinions on the loading equipment should be based upon some factual data rather than the preconceived idea. Often it is difficult …
A Study Of The Transportation Of Mine Rock By Pumping, Howard Morris Fowler
A Study Of The Transportation Of Mine Rock By Pumping, Howard Morris Fowler
Masters Theses
"The conclusions arrived at in regard to the practicability of utilizing pumps instead of skip haulage for the removal of ore and waste from mines are entirely theoretical, as it was impossible to make actual conparative runs. These results were arrived at by comparing known or estimated costs for both types of operations. The abrasion studies were conducted in the laboratory of the Mining Department at the School of Mines and Metallurgy. The pressure tank was designed in an effort to counteract the present necessity for using single stage pumps in sand pumping, and to find a means for eliminating …
An Analysis Of Man Power Efficiency In Drilling Procedures In The Tri-State Mining District, Julian Alban Fuller
An Analysis Of Man Power Efficiency In Drilling Procedures In The Tri-State Mining District, Julian Alban Fuller
Masters Theses
"This thesis embodies the results of an investigation, by the time study method, of certain phases of drilling procedures recently brought into practice in the Tri-State mining district. The field work was accomplished during the months of July, and August 1945; the data obtained therefrom and the analysis presented in this dissertation apply to the practice in effect at that time"--Preface, page ii.
Exploration For Barite Deposits In Cole County, Missouri, Arthur William Brune
Exploration For Barite Deposits In Cole County, Missouri, Arthur William Brune
Masters Theses
"Barite is mined in the Southeastern and Central districts of Missouri. The Counties of Franklin, St. Francois, and Washington comprise the Southeastern district, and the counties of Benton, Camden, Cole, Miller, Moniteau, and Morgan comprise the Central district. Although the latter region is the larger of the two, its production of barite is far less than that of the other. The area which is discussed in this report is in the southwestern corner of Cole County. The main points of the problem were: 1. To determine the features, if any, which apparently controlled the localization of the barite deposits in …
The Mechanical Properties Of Mine Rocks And A Standardized Test Procedure For Their Determination, Walter Edwin Lewis
The Mechanical Properties Of Mine Rocks And A Standardized Test Procedure For Their Determination, Walter Edwin Lewis
Masters Theses
"The problem involves studies of the mechanical properties of rocks and was undertaken in an attempt to determine practical data that will help in estimating the supports required to maintain the roofs of mines during and after mining operations. One of the most important problems in mining today is that of the analysis of the action of mine-rock under stresses. From such an analysis in any given mining venture it should be possible to obtain cheaper methods of mining because the supports necessary to maintain the walls and roof of an excavation may be determined on the basis of how …
Prospecting, Developing, And Mining Bentonite Deposits, John Patrick Rasor
Prospecting, Developing, And Mining Bentonite Deposits, John Patrick Rasor
Masters Theses
"Clay and clay-like minerals are mined in many localities for a large number of uses. Most of these mines are small, seasonal operations. Common practice in these types of pits is to strip and mine clay from shallow overburden depths without the aid of careful prospecting and developing, and with little or no engineering technique. Bentonite deposits which must be continuously mined at tonnages from 5,000 to 7,500 tons per month require that the entire project be carefully planned and engineered so suitable equipment may be obtained and operational cost minimized. This thesis is concerned with the prospecting, developing, and …
A Study Of Mine Scraper Buckets And Their Efficiency, Austin Bond Clayton
A Study Of Mine Scraper Buckets And Their Efficiency, Austin Bond Clayton
Masters Theses
"The use of power drawn scrapers, often called "slushing", for the moving of ore, stops filling, and waste rock has become standard practice in many mining operations. Several types of scrapers have been developed by practical application or by trial and error methods. However, a direct comparison of these scraper types under identical conditions has not been noted in a review of literature on the subject of mechanical loading. Written inquiries to authorities on scraping practice have brought replies that no previous comparisons of scraper types on a modal scale have been attempted. Therefore, the following thesis problem was set …
Copper Commando - Vol. 4, No. 2, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
Copper Commando - Vol. 4, No. 2, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
All Issues, Copper Commando, World War II
In this issue… World War II, War Production, salute, Uncle Sam, Minute Man flag, miners, copper, zinc, War Bonds, Washoe Sampler, ammunition, B-29 Superfortress, B A & P, atomic bomb, battleships, American, Pearl Harbor
Copper Commando - Vol. 4, No. 1, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
Copper Commando - Vol. 4, No. 1, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
All Issues, Copper Commando, World War II
In this issue… World War II, Butte miner, Conda, Idaho, Mountain Con Mine, AFL, CIO, Sells Floto Circus, Zinc Plant, Fort Benton, Montana, Butte Art Center, Montana Hotel, potluck dinner, gallows frame, anodes, safety
Copper Commando - Vol. 3, No. 26, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
Copper Commando - Vol. 3, No. 26, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
All Issues, Copper Commando, World War II
In this issue… World War II, Lower Sun River community, Great Falls, Montana, Charles M. Russell Grade School, 4H club, strawberry plants, Pfister’s Grocery, zinc, leaching, Weber’s Orchestra, agriculture, cadmium
Copper Commando - Vol. 3, No. 25, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
Copper Commando - Vol. 3, No. 25, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
All Issues, Copper Commando, World War II
In this issue… World War II, recreational centers, Columbia Gardens, Butte, Montana, Washoe Park, Anaconda, tour, miner, smeltermen, craftsmen, superintendent, staff, Columbia Amusement Company
Copper Commando - Vol. 3, No. 24, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
Copper Commando - Vol. 3, No. 24, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
All Issues, Copper Commando, World War II
In this issue… World War II, Ledo-Burma Road, Stilwell Road, convoy, American troops, Chinese coolie laborers, drafting, Great Falls, Montana, Prisoner of War, Luchenwalde prison camp, Europe, German soldiers, Nazis
Copper Commando - Vol. 3, No. 23, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
Copper Commando - Vol. 3, No. 23, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
All Issues, Copper Commando, World War II
In this issue… World War II, hard hats, lamps, Butte miners, Mine Safety Appliances Company, Pittsburg, Pennsylvania, Skullgard, Thomas A. Edison, Model P batteries, rheostat, Mine Safety Libraries, carbine, tommy gun
Copper Commando - Vol. 3, No. 22, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
Copper Commando - Vol. 3, No. 22, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
All Issues, Copper Commando, World War II
In this issue… World War II, War Bonds, Infantry, mining cities, Anaconda, Butte, Montana, American Legion, Montana Hotel, Mitchell Stadium, U.S. Army Signal Corps, Pacific battlefront, bazooka, Murray Motors, Columbia Gardens
Copper Commando - Vol. 3, No. 21, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
Copper Commando - Vol. 3, No. 21, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
All Issues, Copper Commando, World War II
In this issue… World War II, IBM, Social Security, taxes, Navy shells, Tokyo, Group Insurance Plan, Anaconda Copper Mining Company, centrifugal pumps, electrician, High Ore Mine, Butte, Montana, War Loan Drive
Copper Commando - Vol. 3, No. 20, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
Copper Commando - Vol. 3, No. 20, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
All Issues, Copper Commando, World War II
In this issue… World War II, Engineers, Leonard Mine, Belmont hoist room, idler towers, headframe, shaft mining, Anaconda Company, Montana, Mt. Con Mine, generator, chippie hoist, Lexington Mine
Copper Commando - Vol. 3, No. 19, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
Copper Commando - Vol. 3, No. 19, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
All Issues, Copper Commando, World War II
In this issue… World War II, Mother’s Day, Philippines, Armed Services, copper wire, Butte, Montana, copper mines, South Pacific islands, Howitzer, Naples, Italy, War Bonds, Labor Management Bond Committee
Copper Commando - Vol. 3, No. 18, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
Copper Commando - Vol. 3, No. 18, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
All Issues, Copper Commando, World War II
In this issue… World War II, Little Chicago, Black Eagle, Montana, Reduction Works, Smelter Avenue, Missouri River, Chicago Mercantile, Cor Store, housewife, Fibber McGee, U.S.O., Sunday dinner, copper wire, brass mills
Copper Commando - Vol. 3, No. 17, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
Copper Commando - Vol. 3, No. 17, Victory Labor-Management Production Committees Of Butte, Anaconda And Great Falls
All Issues, Copper Commando, World War II
In this issue… World War II, Nippon, Yellow Beach, Philippine Islands, Butte Hoist Compressor Plant, zinc, 4H Club, brick masons, Reduction Works, Great Falls, Montana, IBM, Winter Garden Bowling Alley, ACM employees