Engineering Commons^™

Explosive Performance Parameters: A Digital Computer Solution And Error Analysis, Robert T. Stelloh

Masters Theses

"A program was written for the determination of explosive performance parameters on the Royal-McBee LGP-30 electronic digital computer. The method developed by Dr. M. A. Cook was used, which is based on the thermohydrodynamic theory of detonation. This theory and the specific equations developed by Cook are presented.

General statements are made in regard to computer programming, and specific information given concerning the programming concepts used for this particular problem. A detailed explanation of the program operation is given, together with the tabular data required for its use.

Equations are presented for an analysis of the effects of roundoff error …

A Study Of Invert Emulsion Drilling Fluids, Edward R. Tegland

Masters Theses

"Since invert emulsions are being applied as drilling fluids to cope with special drilling and completion problems, evaluations of existing and new types of emulsions are needed. Three types of emulsions are evaluated in this study: (1) type A emulsions prepared with a commercial emulsifier, (2) type B emulsions prepared by adding clay to the external phase, and (3) type C emulsions containing no externally added emulsifier.

Standard testing procedures were used to measure the viscosity and filtration properties of the emulsions studied. Interfacial tension measurements were made using a technique described in the literature. The degree of stability for …

Apparatus For Inductive-Electromagnetic Model Studies, Won Ho Kim

Masters Theses

"The object of this research is to design, construct and calibrate an apparatus suitable for electromagnetic model studies. A portion of the thesis is devoted to general review and theoretical consideration of electromagnetic prospecting.

Theoretical analysis of electromagnetic survey data by mathematical methods can only be carried out for simple idealized subsurface conditions. Because of the difficulties of theoretical solutions, in contrast to the simplicity of the conditions of similitude in electromagnetic exploration, a model experiment offers a very useful means of studying and comparing the response of naturally occuring conducting mineral bodies.

An apparatus suitable for inductive-electromagnetic model studies …

Some Aspects Of Miscible Phase Displacement As Applied To The Recovery Of Oil Reservoir Crude, David D. Friend

Masters Theses

"Recent application of the miscible sing displacement process as a method to increase recovery from petroleum reservoirs has resulted in a great deal of laboratory investigation, none of which provided conclusive evidence as to the amount of mixing taking place between the displacing and displaced fluids. This investigation attempts to provide a possible insight into the rate and degree of mixing of two fluids with respect to flow path transversed and the rate of advance of the fluids. The laboratory investigation consisted of displacing a fluid from a packed core with another fluid under completely miscible conditions.

Experimental evidence indicates …

Analyses Of Two New Electrode Configurations For Earth Resistivity Surveying, Chi-Chao Chang

Masters Theses

"Two new electrode configurations for the electrical resistivity- surveying are introduced: the A-configuration, consisting of a closely spaced pair of current electrodes separated at larger distance from the closely spaced pair of potential electrodes, and the B-configuration, in which each closely spaced pair consists both current and potential electrode. Because electrode pairs can be carried as units, the new configurations can be applied to continuous resistivity surveying more easily than the Wenner configuration....

Theoretical apparent resistivity values are derived, by Maxwell's theory of images, for the A- and B-configuration over a two layered earth using the depth probe method, and …

An Investigation Of The Factors Influencing The Design Of A Dense Prilled Ammonium Nitrate-Fuel Oil Mixture, Robert Bartley Hopler Jr.

Masters Theses

"The physical characteristics of dense ammonium nitrate prills were examined. The density was found to be 1.52 grams per cubic centimeter, and from this the specific surface was calculated for the size fractions of interest in the investigation. Theoretical loading densities were calculated for between 26.0 and 47.6 percent voids.

The explosive properties of discrete particle size fractions were investigated. The equation by Clark was found to predict the detonation velocity of the sizes smaller than 8/20 mesh. The equation by Cook could not be applied to dense prilled ammonium nitrate. The possibility of a very oxygen negative condition existing …

Underground Methods Of Working Coal, Hemendra Nath Datta

Masters Theses

"'Underground Methods of Working Coal' is the subject of this thesis. It is the purpose of this investigation to summarize all the mining methods under various conditions of working.

The underground methods of mining have been classified under three headings; viz., (a) Room and Pillar, (b) Longwall and (c) Horizon Mining. The conditions suitable for the applicability of each system and their relative merits and demerits are fully discussed.

The principles of the design of the workings of both room and pillar and longwall systems to have effective roof control in the area of the workings are pointed out.

Distinct …

Tank Studies Of The Resistivity Horizontal Profiling Method Of Electrical Prospecting, Edward Hornsey

Masters Theses

"This research project was undertaken to perfect a technique whereby theoretical horizontal resistivity profiles could be reproduced in laboratory tank studies.

Several specimen materials were tried and finally an acceptable specimen material was found. It was found that carbon specimens suspended in salt water would give horizontal resistivity profiles that agree to a remarkable degree with the theoretically predicted curves.

The investigations showed that the depth of burial of the specimen has a marked influence on the position of the characteristic edge effects and on the magnitude of the apparent resistivity.

The studies also indicated that successful tank studies could …

A Method Of Estimating Groundwater Influx Into A Vertical Mine Shaft, Morris T. Worley

Masters Theses

"Prediction of groundwater influx into mine openings is one of the more important pre-development problems encountered in mining. A satisfactory method of estimation would provide the information necessary for a mining company to dewater prior to shaft sinking, pre-grout the shaft area, or plan pumping schemes to handle the expected flow.

A standardized field method of estimating groundwater supply from pumping test data was developed by O. V. Theis and others. In the present research problem, the estimation procedure has been simplified by the use of nomograms. Certain modifications in the estimate must be made when a pumping well is …

A Geophysical Investigation Of An Area In Christian County, Missouri, Edwin J. Ballantyne Jr.

Masters Theses

"A vertical intensity magnetic survey of 144 square miles in Christian County, southwest Missouri revealed an 825 gamma anomaly having a closure of 9 square miles. A three mile gravity traverse across the magnetic anomaly detected a positive gravity anomaly in excess of six mllligals.

Calculations showed that a Precambrian hill large enough to cause the observed magnetic anomaly would outcrop at the surface. Because Precambrian rocks are known to be buried under a sedimentary layer, this hypothesis was rejected.

Theoretical anomalies of several geometrical bodies at calculated depths were visually compared with the measured magnetic and gravity profiles. A …

Correlation Of Dust-Count Results By Zeiss Konimeter And Midget Impinger, Chandmal Jain

Masters Theses

"In this modern age, the scientific and technological developments have advanced mechanized mining to the status wherein the attendant dust problems have reached very serious hazard proportions. The significant roles, which have been perfected for the Zeiss konimeter and the midget impinger, in evaluating dust concentrations and thereby revealing possible improvements in making the atmospheric conditions safer, cannot be over emphasized.

While introducing the subject of this paper in the first chapter, the author has presented a historical resume, wherein he pointed out that performances of these instruments have not been correlated in the past. However, the work reported on …

Impact Energy Coupling And Impact Seismic Refraction Using Electronic Timing, Roderick D. Carroll

Masters Theses

"The use of impact energy sources in lieu of explosives for shallow seismic investigations is limited chiefly by the low energy available. Means of increasing the energy transmission of an impact source are investigated, using a weight drop arrangement and an oscilloscope. The energy of refracted arrivals is investigated by direct overburden impacts, compaction of the overburden at the point of impact and the use of steel and aluminum plates as coupling devices. Energy transmission is shown to be greatly increased, using a suitable coupling device and the conditions for optimum coupling are discussed. The elastic constants of the ground …