The effect of mining faces direction on the observed seismic activity
The copper ore deposit exploited byKGHM Polish Copper Ltd.is located in Fore-Sudetic Monocline within the Legnica-Glogów Copper Belt Area (LGOM) of south-western Poland.Copper ore extraction in Poland is concentrated in three un derground mines: Lubin, Rudna and Polkowice-Sieroszowice, where difficult geological and mining conditions often occur.A major natural hazard associated with LGOM mining is the dynamic phenomena occurrence, physically observed as seismic tremors.Some of them generate effects in the form of relaxations or bumps.Long-term observations of the rock mass behaviour indicate that the degree of seismic hazard, and therefore also seismic activity in theLGOM area, is affected by the great depth of the copper deposit, high-strength rocks as well as the ability of rock mass to store elastic energy.In this aspect, the effect of the characteristics of initial stress tensor and the orientation of considered mining panel in regards to its components must be emphasised.Moreover, mind-out areas in the vicinity of the mining panel is also of great interest.An area of the underground mine infrastructure, where the probability of occurrence of dynamic phenomena such as bumps, roof falls or rock outbursts is relatively low, may be considered as safe in terms of thegeomeehanical hazards.Since,however, seismic activity is associated directly with these phenomena, it also should be kept at as low as possible level The primary objective of this study is to answer the question, which of the factors considered as influencing the dynamic phenomena occurrence in copper mines have a statistically significant effect on seismic activity and to what extent.Using the general linear model procedure, an attempt has been made to quantify the impact of different parameters, including the depth of deposit, the presence ofgoaf in the vicinity of operating mining panels and the direction of mining face advance, on seismic activity based on historical data from 2000 to 2010 concerned with the dynamic phenomena recorded in different mining panels inRudna mine.Since it has been assumed that the appropriate manipulation of parameters of mining systems can ensure the safest variant of mining method under specific geological and mining conditions, the effect of the direction of mining face advance on seismic activity is of the greatest interest in this analysis.
Witold Pytel Joanna Switon Adrian Wojcik
KGHM Cuprum Ltd.Research and Development Centre KGHM Polish Copper Ltd., O/ZG Rudna Department
国际会议
The 34th International Conference on Ground Control in Mining (ICGCM) 2015(34届国际采矿岩层控制会议)
焦作
英文
185-191
2015-10-17（万方平台首次上网日期，不代表论文的发表时间）