GEOMECHANICAL ESTIMATION OF STABILITY PARAMETERS OF PIT SLOPE SCALE AND BATTERS WHEN DEVELOPING THE APATITE-NEPHELINE ORE DEPOSIT «OLENIY RUCHEY»

Известия Томского политехнического университета: Инжиниринг георесурсов

卷:330

Natalya A. Nemova¹  Tatyana A. Belsh¹ 

[1]Institute of Mining, Siberian Branch, Russian Academy of Sciences

关键词: quarry;    mine;    pit;    batter;    slope;    slope (side;    ledge);    pit wall reserves;    rock mass;    geomechanical substantiation;    stress-strain state;    stability;    safety factor;    destruction;    development system;    safety;    efficiency;   

DOI  :  10.18799/24131830/2019/11/2355

来源: DOAJ

【 摘 要 】

The relevance of the research is caused by the need to conduct safely mining in quarries with a depth of over 360 m. Increasing production volumes is possible with significant deepening; to reduce the amount of overburden it is necessary to twist the side slopes and ledges. To solve this issue, it is necessary to know the geomechanical situation of the benches and sides both on the limiting contour and when changing their basic parameters – height and inclination angle. The main aim of the research is to analyze the mining and geological conditions of the «Oleniy ruchey» deposit and the existing data on physicomechanical properties of the rocks forming the massif of the deposit in question, to calculate and check the stability of the slopes of the pit’s edges on the marginal contour and to find the possibility of tilting the sides and overburden ledges during mining. Objects: large deposit of apatite-nepheline ores «Oleniy ruchey». Methods: mining and geological analysis of the «Oleniy ruchey» deposit and analysis of existing data on the physicomechanical properties of rocks composing the array of the deposit in question, analytical calculations of the stability of slope elements. Results. The authors have obtained the data of calculations of slope stability without attenuation surfaces in the near-side massif of the border in the hanging side of the ore deposit (hanging side) and taking into account the angle of incidence of the Main fault at the angle of 40–45° while forming the open-pit side in the bottom wall (recumbent board), and taking into account as well the seismicity of the area and groundwater level. The parameters of the slopes of the sides of the limit circuit were determined. The obtained values of the parameters are valid in the absence of weakening surfaces in the near-surface array. In the presence of loosening surfaces with a fall in the production of slopes, it is necessary to roll back strictly along these surfaces.

【 授权许可】

Unknown