Research On The Stability Of Open-pit Slope Influenced By Blasting Vibration

Open-pit is very important in mines daily produce. As the produce going on,many open-pits have or have gone into concave open pit excavation,eg. NanFen iron mine, Da Ye iron mine, DaGuShan iron mine and so on. For these mines as the depth increasing, hundreds meter last slope will come out. A lot of open-pits at home and abroad, use high and steep slope excavations. As a result, there will be many high and steep slopes. Blasting,the main method of breaking rocks, may threat the stability of these slop,with the obviously increaseing production efficiency.The slopes of open-pits are sTable.or not,will directly influence mines daily production,the safty of equipments and workers,it also do effect to the economic profit.The sTable.of the high and steep slope mainly be decided by mine engineering geology conditions, as the ore and rock physics mechanics character structure, construction and mining method and slope parameter are fixed,blasting vibration in the mines production is the main factor to the sTable.of slope.So, study the effect of blasting virbration to the sTable.of slopes and put forward effective and feasible decrease blasting vibration measures are very meaningful.For the sTable.of the slopes,many scholars have carried through lucubrate,and gain lots of effective applied study fruits. At first,this paper introduce the arose of the blasting seismic waves, the spread rule and the action mechanism. On the base of analysis the blasting sesmic waves and its vibrate damage mechanism, across the effect analysis of extro-load of blasting vibration on the slopes,illumines the sTable.effect on the high and steep open-pit slopes by blasting vibration for the more. Across the analysis the factors which effect the blasting vibration by gray correlation analysis method, it can conclude the main effect factors, and it can offer gist to take measure in order to control and decrease blasting vibration. Through blasting test, and analysis and deal with the test result,it can help us explore the transmit rule of the blasting wave in different geological conditions. At the same time,we bring forward the safty criterion aimed at different slope conditions.This make the predicte and control of the stability of high and steep slope more reasonable.