铜山口铜矿露天采场边坡平面破坏研究
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摘要
为了得到铜山口铜矿露天采场南边坡与西边坡的稳定性,采用RocPlane2.0分析软件对边坡台阶进行了平面破坏稳定性研究。研究结果表明:1)受力在I～Ⅵ条件下,边坡的安全系数依次降低;在张裂缝、爆破振动力与地震力影响因素的控制对比下,地震力对边坡稳定性的影响较大。2)南边坡与西边坡台阶高度为12m,坡面角≤75°时,6种受力情况边坡的安全系数均大于许用安全系数,边坡台阶不会发生平面破坏;台阶高度为24m,坡面角≤75°时,6种受力情况边坡的安全系数均大于许用安全系数,边坡台阶不会发生平面破坏。3)建议在台阶并段开采(24m)时,其台阶的坡面角为75°。研究结果可为矿山安全生产设计提供参考。
In order to obtain the stability of the south and west slope of Tongshankou copper mine open pit,the plane failure stability of the slope step was studied by using RocPlane 2.0 analysis software.The results indicated that:1)under the condition of I-VI,the safety factor of slope decreased in turn;under the control of tension fissure,blasting vibration force and seismic force,the influence of seismic force on slope stability was greater.2)When the height of the step of the southern slope and the western slope was 12 mand the slope angle was less than75 degrees,the safety factors of the slope under six loading conditions were greater than the allowable safety factor,and the slope step would not be damaged in plane.When the height of the step was 24 mand the slope angle was less than 75 degrees,the safety factors of the slope under six kinds of stress conditions were greater than the allowable safety factor,and the slope step would not occur plane damage.3)The slope angle of the step was suggested to be 75 degrees when the bench section was mined(24 m).The results can provide reference in mine safety production design.
In order to obtain the stability of the south and west slope of Tongshankou copper mine open pit,the plane failure stability of the slope step was studied by using RocPlane 2.0 analysis software.The results indicated that:1)under the condition of I-VI,the safety factor of slope decreased in turn;under the control of tension fissure,blasting vibration force and seismic force,the influence of seismic force on slope stability was greater.2)When the height of the step of the southern slope and the western slope was 12 mand the slope angle was less than75 degrees,the safety factors of the slope under six loading conditions were greater than the allowable safety factor,and the slope step would not be damaged in plane.When the height of the step was 24 mand the slope angle was less than 75 degrees,the safety factors of the slope under six kinds of stress conditions were greater than the allowable safety factor,and the slope step would not occur plane damage.3)The slope angle of the step was suggested to be 75 degrees when the bench section was mined(24 m).The results can provide reference in mine safety production design.
引文
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[2]CAI F,NAKAMURA A,UGAI K.Revisiting the threedimensional slope stability problem in clay[J].Canadian Geotechnical Journal,2011,49(4):494-498.
[3]BISHOP A W.The use of the slip circle in the stability analysis of slopes[J].Geotechnique,1955,5(1):7-17.
[4]郑禄璟,郑禄林,常晓娜,等.露天边坡稳定性影响因素分析及防治措施[J].金属矿山,2014(2):131-136.
[5]王林峰.复杂岩体边坡损伤断裂破坏机制[D].重庆:重庆交通大学,2012.
[6]周应华,周德培,邵江.双坡面临空岩质边坡滑动破坏模式下的稳定性分析[J].山地学报,2006(4):446-449.
[7]张飞,李默然,周连春,等.白云鄂博铁矿东矿边坡稳定性研究[J].工矿自动化,2011,37(1):50-52.
[8]洪儒宝,简文彬.露天矿边坡失稳破坏模式及其稳定性研究[J].有色金属(矿山部分),2016,68(5):72-77.
[9]李芬,成涛.基于双折减系数法的岩质边坡平面滑动分析[J].公路工程,2018(5):294-299.
[10]杜伯辉,曹永成,张性一,等.水电水利工程边坡工程地质勘察技术规程(DL/T 5337-2006)[S].北京:中国电力出版社,2006.