Investigations on the Stress in Circular Shaft Linings

Abstract

For the purpose of contributing data for the reasonable design of shaft linings, the authors have tried, at first, to measure the stress in the linings of several vertical shafts recently sunk in coal mines by means of a photoelastic stressmeter, and have obtained data for estimating the earth pressure that may act on shaft linings when they are sunk into ground of various conditions. Secondly the stresses in a circular shaft lining caused by various states of earth pressure are analysed by the theory of elasticity, and the stress concentration due to irregular earth pressure is clarified. Part I describes the results of the stress measurements, and Part II the results of the analysis.