地下采矿对岩质坡体稳定性影响的参数敏感性分析
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摘要
为了获得地下采矿对岩质坡体稳定性的影响规律,采用数值模拟方法,结合正交试验,分别就开采过程中煤层厚度、开采深度、采空区的面积、工作面与坡体的相对位置以及煤层倾角等因素变化对坡体稳定性的影响过程及其敏感性进行了分析。结果表明,采矿活动对坡体稳定性的影响随采空区面积和煤层厚度的增加而增加,随煤层倾角以及采空区与坡体距离增大而减小,开采深度对坡体稳定性的影响表现在先增加后降低,当深度在200~250 m时开采对坡体稳定性的影响最大。在满足生产需求的条件下,控制采空区面积是减少开采对坡体稳定性影响的最有效手段。
To obtain the influence of underground mining activity on rock slop stability,by using numerical simulation and orthogonal experiment,the influencing process of main factor changes(e.g.coal seam thickness,mining depth,goaf size,relative position between coal face and slop,coal seam dip angle) on rock slop stability and the parameter sensitivities during mining process were analyzed in this paper.The results show that the influence degree of mining activity on rock slop stability increases with the increase of goaf size and coal seam thickness,and decreases with the increment of coal seam dip angle and relative position between coal face and slop.Meanwhile,the influence of mining depth on slop stability firstly increases,then decreases,while mining in the depth between 200~250m.most influence the slop stability.When meeting the production demands,the goaf size control is the best method to reduce the influence of mining activity on rock slop stability.
To obtain the influence of underground mining activity on rock slop stability,by using numerical simulation and orthogonal experiment,the influencing process of main factor changes(e.g.coal seam thickness,mining depth,goaf size,relative position between coal face and slop,coal seam dip angle) on rock slop stability and the parameter sensitivities during mining process were analyzed in this paper.The results show that the influence degree of mining activity on rock slop stability increases with the increase of goaf size and coal seam thickness,and decreases with the increment of coal seam dip angle and relative position between coal face and slop.Meanwhile,the influence of mining depth on slop stability firstly increases,then decreases,while mining in the depth between 200~250m.most influence the slop stability.When meeting the production demands,the goaf size control is the best method to reduce the influence of mining activity on rock slop stability.
引文
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[3]戴华阳,翟厥成,胡友健.山区地表移动的相似模拟试验研究[J].岩石力学与工程学报,2000,19(4):DAI Hua-yang,ZHAI Jue-cheng,HU You-jian.Researchon similar simulation test of surface movement inmountain area[J].Chinese Journal of Rock Mechanicsand Engineering,2000,19(4):501-504.
[4]单晓云,姜耀东,王乐杰,等.地下采煤对巍山山体裂缝影响的有限元分析[J].煤炭学报,2008,33(1):23-27.SHAN Xiao-yun,JIANG Yao-dong,WANG Le-jie,et al.Finite element analysis of effect of underground coalmining on landslide of the Wei mountain[J].Journal ofChina Coal Society,2008,33(1):23-27.
[5]夏元友,熊海丰.边坡稳定性影响因素敏感性人工神经网络分析[J].岩石力学与工程学报,2004,23(16):2704-2707.XIA Yuan-you,XIONG Hai-feng.Sensibility analysis ofslope stability based on artificial neural network[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(16):2704-2707.
[6]唐晓松,郑颖人,叶海林.涉水岸坡稳定性影响参数的敏感性分析[J].后勤工程学院学报,2008,24(2):22-26.TANG Xiao-song,ZHENG Ying-ren,YE Hai-lin.Thesensibility analysis of influencing factors of the paddleslope stability[J].Journal of Logistical EngineeringUniversity,2008,24(2):22-26.
[7]苟海军,袁继国,何伟,等.三峡库区危岩稳定性影响因素敏感性分析[J].电网与清洁能源,2008,24(2):47-50.GOU Hai-jun,YUAN Ji-guo,HE Wei,et al.Thesensitivity analysis of factors affecting three gorgesreservoir perilous rock belt[J].Power System&CleanEnergy,2008,24(2):47-50.
[8]朱婷.基于三维刚体极限平衡法的岩质边坡参数敏感性分析和工程应用[D].宜昌:三峡大学土木与建筑工程学院,2010.
[9]付宏渊,吕东滨,刘建华.震区岩质边坡地震稳定性影响因素敏感性分析[J].交通科学与工程,2010,26(3):14-19.FU Hong-yuan,LV Dong-bing,LIU Jian-hua.Sensitivityanalysis on factors of seismic stability of rock slope in theearthquake zone[J].Journal of Transport Science andEngineering,2010,26(3):14-19.
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