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THE AZIMUTHS DIFFERENCE METHOD AS AN EFFECTIVE METHOD OF DETERMINING THE VALUE OF HORIZONTAL STRESS ACTING ON MINING EXCAVATIONS IN UNDERGROUND MINES
Abstract
Impact of horizontal stresses on stability of underground workings in mines is a very important issue in underground mining. Identification of the initial state of stress in the rock-mass should be one of the main actions taken into account while designing and carrying out the mining activity in underground mines. The paper presents the azimuths difference method. This innovative method can be used to estimate numerical quantity of the perpendicular and parallel horizontal stress around underground mining excavations. The azimuths difference method has importance for the process of improvement of underground mining excavations stability and selection of mining support for headings. The tests on three-dimensional stress pattern in the Rudna copper mine in 2012, owned by KGHM Polska Miedz S.A. Group, were described. On the basis of the obtained results, calculations of horizontal stress for selected mining headings in the Rudna mine were carried out using the azimuth difference method.
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