Fluctuating pressure, in the mine ventilating circuit, caused by single cage winding

Stewart, Ronald (1962) Fluctuating pressure, in the mine ventilating circuit, caused by single cage winding. PhD thesis, University of Glasgow.

Abstract

This thesis describes work carried out in the Mining Department of the Royal College of Science and Technology, Glasglow, during an investigation into disturbances in the mine ventilation circuit caused by single cage winding. Finding with a single cage instead of two smaller balanced cages had a very noticeable effect on the ventilation of a North of England colliery and the substance of a report by the Area ventilation staff, describing these effects, is included in the thesis in order that these effects may be more clearly understood. The colliery, the ventilation of which is described in the report, is Ryhope colliery and is referred to in the thesis as colliery R. The investigation described in the report was, naturally very limited in scope, due to the small number of factors which could be varied, so it was decided to construct a model in which the effects could be simulated, and in which more factors could be varied. The considerations influencing the design of the model are explained and the model is described. The methods of measurement used and the instruments involved are described, and tests which were performed to assess the limitations of the pressure recorded are included, together with the conclusions to which they lead. The tests carried out on the model fall into two groups. The first is concerned with the pressure drop produced by the cage, and the factors which affect it. The second deals with the effects on the ventilation systems of communicating this pressure drop to the large volume of air contained in the underground workings. The tests in each group are described in full and the conclusions are drawn. Having described in the work connected with the model the thesis then deals with theoretical methods of predicting the effects. The investigation leading to the method used is fully explained and the method is given in detail. Many examples have been solved using the method and the results and conclusions have been given. An alternative method of solution is indicated and its advantages and limitations discussed. In the conclusions an assessment is made of the phenomenon in the light of the knowledge which has been gained from both actions of the work. All factors which may influence the effects are considered and their relative merits discussed. The limitations of the present investigation are indicated and suggestions are made as to how the work may be extended.

• Item Type: Thesis (PhD)
• Qualification Level: Doctoral
• Additional Information: Adviser: G Hibbard
• Keywords: Mining engineering
• Date of Award: 1962
• Depositing User: Enlighten Team
• Unique ID: glathesis:1962-73531
• Copyright: Copyright of this thesis is held by the author.
• Date Deposited: 14 Jun 2019 08:56
• Last Modified: 14 Jun 2019 08:56
• URI: https://theses.gla.ac.uk/id/eprint/73531