ASSESSMENT OF GEOMECHANICAL CONDITION OF ROCK MASS IN THE VICINITY OF SLOPES OF ADJACENT COAL SEAMS USING NUMERICAL FINITE ELEMENT MODELING
We have investigated the geomechanical state of rock mass in the vicinity of the four slopes of adjacent seams 1 and 2 using numerical finite element modeling. The author used a complex computer programs CoalPillar, developed at the Department of Geotechnology SibGIU adapted to the geological and mining conditions of one of the mines Erunakovskogo geological and economic region of Kuzbass. Numerical simulation of finite element method was carried out with two versions of the natural stress field outside the influence of mine workings: the gravitational field of stress and geotectonic stress field. On the stability of slopes on the lower seam 1 significantly affects the upper seam 2, since the height of the arch fracture rock slopes in the seam 1 reaches the roof of the seam 2. Seam 1 has little effect on soil heave rocks slope on the sides of the seam 2. The workings of coal is expected to spin, so the vertical stress in the 1.2 to 1.5 times the tensile strength of coal under compression in natural conditions. The proposed method of assessment of geomechanical parameters when changing geological and mining conditions will develop appropriate preventive measures and recommendations for inclusion in the passport of fastening of developments that will improve the safety of mining operations.