Abstract
A proper assessment of the stability leads to proactive decision making for the method of construction, the shape and size of the cross-section of the facility and the adequate support. The stability is directly dependent on the physical, mechanical and technical characteristics of the rock mass. The traditional assessment-based approach and the classification of stability of underground facilities is based on both experience and experiments with previously constructed facilities. To ease the process for the early phase of design, there was a need for the development of a mathematical model for assessment of the stability. Ambiguity in mining engineering, directs the development of the model using a fuzzy logic system and fuzzy if-then rules. The model was developed based on very scarce input data that is most often the only data available during the design stage. Fuzzy model results have shown, through the random selection of input data in the model, that in 70% of cases, there is high numerical congruence with the traditional method for determination of coefficient of stability S; and in 90% of cases, there is also congruence in accordance with the traditional approach to the classification of underground facilities based on the stability assessment.
Highlights
The increasing need for the global construction of underground facilities. is due to the rapid expansion of urban zones –e.g. underground passages, parking spaces, underground tunnels for road traffic, the development of a network of underground city railways, metros, a larger number of communal tunnels, as well as underground mining roadways and facilities
Its physical and chemical composition, as well as genesis, mineral composition, structural, texture, physical and hydrological characteristics and tectonicism, influence the physical, mechanical and technical characteristics of the rock mass. This leads to the conclusion that, with the application of fuzzy sets, the parameters of the rock mass can be classified in much more detail
The research in this paper has indicated that the fuzzy logic approach to the stability assessment of underground facilities is possible
Summary
The increasing need for the global construction of underground facilities. is due to the rapid expansion of urban zones –e.g. underground passages, parking spaces, underground tunnels for road traffic, the development of a network of underground city railways, metros, a larger number of communal tunnels, as well as underground mining roadways and facilities. Is due to the rapid expansion of urban zones –e.g. underground passages, parking spaces, underground tunnels for road traffic, the development of a network of underground city railways, metros, a larger number of communal tunnels, as well as underground mining roadways and facilities. These underground facilities that are necessary for the utilization. The high standards set within the field of environmental protection either do not allow disturbances of the terrain or require the re-cultivation of the degraded terrain (created in the midst of mining activities) These have, led to an increase in ore prices. With the implementation of the fuzzy model, comes the need for a properly-selected support system and an accurate dimension of the cross-section of these underground facilities
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