Statistical analysis of field measurements during the excavation of mine workings and their assessment

Abstract

The article describes the production experience and a static analysis of the results of field measurements during the excavation of mine workings by contour blasting. A decision to perform field measurements during excavation and a statistical analysis of the results is made in order to assess the possibility of their use for normalization. The high degree of correspondence of the actual distribution of the results of field measurements to the normal law makes it possible to successfully use all the statistical characteristics of the theoretical distribution in analytical studies and in solving problems of improving technology and normalizing using the contour blasting method. The bulk of the results of downhole measurements of the parameters of contour blasting is in a narrow range of two standards ẋ ± Sx which allows us to further consider these ratios as criteria for the development of regulatory tolerances for the execution of a Blasting Pattern (BP) that provides practically acceptable contouring accuracy and the quality of the newly formed surface space.