Effect of Active Mining Impact On Properties with Engineering Structures – Forecast and Final Result Discrepancies

Abstract

Discussed is one of the stages of an ongoing research study analysing the form and area of active mining impact on properties which include engineering structures. A general back analysis has been applied to the cause and effect method for defining the causes of empirically determined structural damage. The calculation model and numerical model of engineering structure and the environment with different influence are created on all basis data what are known from the project and documents. One of the aspects of the research study analyzed here explores the current assumptions for mining damage forecasts for areas affected by a mine over a planned operation period. Considering that mining forecasts specify the quantity, impact duration, as well as the form of static and dynamic forces responsible for stresses and deformations resulting from active mining, the information is most critical for the construction and industrial sectors. The mining plans for the analyzed areas are based on the final information supplied by the forecasts, and show active mining areas clearly outlined; thus making it possible to delineate the active mining impact areas when preparing guidelines for building and structure construction permits. The mining damage area parameters determine the design and construction requirements for individual projects which must comply with engineering structure foundation specification for areas exposed to other than standard and highly damaging active mining impact. Mining forecast data allow for designing adequate structural, material, and geothermal safeguards which will stabilize the soil and reduce forces negatively impacting soil serviceability limit states. Owing to the high number of problems attributable to discrepancies between the mapped mining damage areas, the calculations and assumptions used in mining forecasts, and the actual conditions, this study aims to analyze the problem. Based on the information supplied and the author’s own observations supported by empirical investigations, the following conclusions have been developed.