Time-Dependent Cox Regression Analysis of Rock Salt | Chapter 7 | Advances and Challenges in Science and Technology Vol. 2

 The main objective concerning this study is to analyse and anticipate the potential risk of rock salt damage using the Cox equivalent hazard model. Analysed according to the belief of continuous mechanism medium rock massif is a natural environment troublesome to know, so the forecasts refer to its behaviour are approximate and changeable. Such an assertion enhances a certitude, even developing from reality; results of the four fundamental features of mountain system are multiple and include really troublesome issues in mining field and mainly, in the constructions field. The concept and the habit to assess the stability of secret construction includes understanding its phenomenological development and doubtless the personality of rocks behaviour in massif. Most of moment of truth, the analysis of the behaviour of the rocks and the chance of their breaking requires concern of the simultaneous belongings of several determinants. Rocks behave otherwise over time, and in any position, there is a feasibility that the break will manifest itself. Many times, we do not have complete information for the study of the resistance period of the rocks. To carry out aforementioned an analysis, we projected the use of a regressive means, that is, the Cox equivalent hazard model. By applying the Cox model or equivalent hazard regression, we have the feasibility of predicting the relative risk (potential risk) of the incident of rock breakage based on various variables. Risk (hazard) can have a different alternative, either in the sense that it can increase in time or possibly decrease; if over time skilled is no variable or determinant that determines an progress towards breaking the rock, then the risk of breaking is lower. Based on the standard scheme of rocks behaviour habit to failure, we are intend a statistical reasoning method of results acquired by laboratory tests using Cox reversion. This method offer the chance to provide quantitatively and qualitatively moment of truth when the breakage happens. The method allows us to establish the link betwixt a certain determinant through which maybe forecasted rock breakage and the talent to resist; the design can be grown and applied massif scale and again in the stability study of underground everything.

Author(s) Details:

Mihaela Toderas,
University of Petrosani, Petrosani-332006, Romania.

Please see the link here: https://stm.bookpi.org/ACST-V2/article/view/11930