地震和煤矿采动耦合作用下露天矿边坡及采空区稳定性研究
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
为了探讨地震和煤矿采动耦合作用下的露天矿边坡及采空区的稳定性,以辽宁排山楼金矿露天转井工开采为研究对象,基于FLAC3D有限元分析平台,采用强度折减法研究了未进行煤炭开采时和煤矿采动单独作用下露天矿边坡的安全系数,重点探讨了煤矿采动和地震耦合作用下露天矿边坡及采空区应力场、位移场及塑性区的分布规律。结果表明:未经采动时,露天矿边坡的安全系数为1.21,边坡处于稳定状态;煤矿采动后露天矿边坡安全系数降为1.12,仍处于稳定状态,单独的煤矿采动作用不会导致露天矿边坡失稳;在地震和煤矿采动耦合作用下,露天矿边坡坡体内出现了较大的拉应力,采空区顶板出现冒落现象,底板出现底鼓现象;在地震和采动耦合作用下,边坡将出现失稳破坏,破坏形式主要为采动区顶板的大面积冒落和边坡的崩塌。
To analyze the stability of slope and goaf of open-pit mine caused by the coupling effect of earthquake and mining,we take the opencast-to-underground mining of Paishanlou gold mine in Liaoning Province as the research object. Based on FLAC3 D platform,we study the security coefficients of the slope of open-pit mine in unexploited case and under the action of mining by strength reduction method. On the basis of it,we focus on the distribution law of the stress field,displacement field and plastic zone of the slope and the goaf of open-pit mine under the coupling effect of earthquake and mining. The research result show that the security coefficient of the slope of open-pit mine is 1. 21 before mining and decreases to 1. 12 after mining,and the slope is in the state of stable before and after mining,so the single mining effect cannot lead to the instability of slope. Under the coupling effect of earthquake and mining,the strong tensile stress appears within the slope body of open-pit mine,the caving happens to the roof and the pucking occurs to the roof in the goaf,and the slope will be instable and destroyed,and the forms of destroy are mainly the carving of roof in large-sized area and the collapse of slope in the goaf.
引文
柴红保,曹平,柴国武,等.2010.采空区对边坡稳定性的影响[J].中南大学学报:自然科学版,41(8):1528-1534.
    程宇,蔡永恩,胡才博,等.2012.断层破裂过程对边坡的广义荷载场的动态影响[J].地震研究,35(1):79-85.
    冯志仁,刘红帅,于龙.2014.地震作用下含软弱夹层顺层岩质边坡表面放大效应研究[J].防灾减灾工程学报,34(1):96-100.
    黄帅,宋波,牛立超,等.2014.地震作用下动孔隙水压力对边坡永久位移影响的简便计算方法[J].建筑结构学报,35(3):215-221.
    江学良,杨慧,文畅平,等.2013.含地下采空区岩质边坡的施工过程数值分析[J].中国安全科学学报,23(1):107-114.
    李祥龙,唐辉明,王立朝.2014a.顺层岩体边坡地震动力破坏离心机试验研究[J].岩石力学与工程学报,33(4):729-736.
    李祥龙,唐辉明.2014b.逆层岩体边坡地震动力破坏离心机试验研究[J].岩土工程学报,36(4):687-694.
    刘书贤,郭涛,魏晓刚,等.2014a.地震作用下煤矿开采损伤建筑的能量耗散演化致灾分析[J].地震研究,37(3):442-449.
    刘书贤,刘书会,魏晓刚,等.2011.采动区地震—开采沉陷变形对建筑耦合作用[J].辽宁工程技术大学学报(自然科学版),30(s):92-94.
    刘书贤,王春丽,魏晓刚,等.2014b.煤矿采空区的地震动力响应及其对地表的影响[J].地震研究,37(4):642-647.
    刘书贤,魏晓刚,张弛,等.2013.煤矿采动与地震耦合作用下建筑物灾变分析[J].中国矿业大学学报,42(4):526-534.
    刘书贤,魏晓刚,张弛,等.2014c.基于隔震技术的桥梁结构抗采动变形抗地震保护[J].地震研究,37(1):86-93.
    孙进忠,陈祥,王余庆.2004.岩土边坡地震崩滑的三级评判预测[J].地震研究,27(3):256-264.
    孙世国,王群.2014.井工转露天开采边坡岩体滑移机制的试验研究[J].中国安全生产科学技术,10(4):13-17.
    王云鹏,张瑞新,李二旭,等.2010.井工开采影响下的露天矿边坡沉陷规律研究[J].中国安全生产科学技术,6(6):98-102.
    魏晓刚.2011.考虑土—结构相互作用的采动区建筑物抗震抗变形双重保护装置减震分析[D].阜新:辽宁工程技术大学.
    尹光志,李小双,李耀基.2012.底摩擦模型模拟露天转地下开挖采空区影响下边坡变形破裂响应特征及其稳定性[J].北京科技大学学报,34(3):231-238.
    张春礼.2009.采动与地震共同作用下建筑物的破坏过程研究[D].青岛:青岛理工大学.
    Hatzor Y.H.,Arizb A.A.,Zaslavskyc Y.,et al..2004.Dynamic StabilityAnalysis of Jointed Rock Slopes using DDA Method[J].International Journal of Rock Mechanics&Mining Science,41:813-821.
    Kazmi Z.A.,Konagai K.,Ikeda T..2014.Field Measurements and Numerical Simulation of Debris Flows from Dolomite Slopes Destabilized during the 2005 Kashmir Earthquake Pakistan[J].Journal oEarthquake Engineering,18(3):364-388.
    Kokusho T.,Tlshizawa.2007.Energy Approach to Earthquake-introducedSlope Failure and its Implication[J].Journal of Geotechnical andGeoenvironmental Engineering,133(7):828-840.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心