Examples of the Knothe-Budryk theory parameter determination under complex geological and mining conditions
Year: 2022
Type: article
Abstract: As is characteristic of every theoretical model, its application necessitates the adoption of appropriate parameters.Adopting incorrect parameters leads to erroneous results.This also concerns the application of the Knothe-Budryk theory of rock mass movement.The complexity of the geological and mining conditions means that the a priori adoption of the appropriate parameters requires analyzing the measured deformation factors.Geodesic measurements are performed for this purpose, which apart from enabling deformation prediction control, also serve to provide a posteriori parameter determination, which is subsequently used to predict the deformation induced by mining exploitation conducted under analogous conditions.The article presents the determination process and results of the following Knothe-Budryk theory parameters: the extraction coefficient (a), the rock mass parameter (tgβ), the offset of the inflection point (p) and the coefficient of influence deviation depending on the inclination of Carboniferous strata (k), based on two examples of exploitation.The examples are characterized by diverse geological and mining conditions.In the first example, the panels exhibit varied shape and dimensions, and are located on two sides of a trough, which has resulted in a deviation of the deformation in two opposite directions.The second example presents an analysis of deformations induced by the exploitation of one longwall located at a great depth of over 1000 m, on a tilted side of a trough and within an area exhibiting a diverse degree of prior mining.
Source: Mining Science
DOI: 10.37190/msc222903
Authors: Bartosz Apanowicz, Andrzej Kowalski, Piotr Gruchlik, Piotr Polanin
Institution: Central Mining Institute
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4319982254