正断层对采煤沉陷控制作用的试验研究
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摘要
利用RFPA2D软件,分别建立除正断层类型不同外,其它地质、采矿条件完全相同的两类模型,以模拟正断层对采煤沉陷的控制作用.第一类模型为断层落差为5m时,倾角分别为60°,70°和80°的3个模型;第二类模型为断层倾角为70°时,落差分别为1m,3m和5m的3个模型;又建立了1个无断层的模型,共7个模型.根据数值模拟的结果,提出正断层对采煤沉陷的控制作用的规律.同时,简要分析了因地下开采而引起煤层上覆岩层中应力场的变化情况.
Two types of models are separately built under the condition of the same intensity of geologic mining except types of normal fault structures with RFPA2D to simulate that normal fault has an effect on coal- mining- induced subsidence. Models of category 1 are three models, which inclined angles of faults are 60°, 70° and 80° separately when the fall of faults is five meters; Models of Category 2 are three models, too, where the fall of faults are 1m, 3m and 5m separately when the inclined angle of faults is 70°. Another model is built for the situation of no fault, there are seven models altogether. Based on the results of numerical simulation, the law on controlling function of fault over coal- mining- induced subsidence is advanced. Meanwhile, the changing of the stress of overlying strata of seam caused by underground coal mining is analyzed briefly, too.
Two types of models are separately built under the condition of the same intensity of geologic mining except types of normal fault structures with RFPA2D to simulate that normal fault has an effect on coal- mining- induced subsidence. Models of category 1 are three models, which inclined angles of faults are 60°, 70° and 80° separately when the fall of faults is five meters; Models of Category 2 are three models, too, where the fall of faults are 1m, 3m and 5m separately when the inclined angle of faults is 70°. Another model is built for the situation of no fault, there are seven models altogether. Based on the results of numerical simulation, the law on controlling function of fault over coal- mining- induced subsidence is advanced. Meanwhile, the changing of the stress of overlying strata of seam caused by underground coal mining is analyzed briefly, too.
引文
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[2]郭迅,戴君武.采煤沉陷与断层相互作用一起地表建筑物破坏特点分析[D].哈尔滨:中国地震局工程力学研究所,2006.GUO Xun,DAI Junwu.Analysis of building damage caused by interaction between faults and coal mining subsidence[D].Harbin:China Earthquake Administration,Institute of Engineering Mechanics,2006.(in Chinese)
[3]王思敬.论人类工程活动与地质环境相互作用及其环境效应[J].地质灾害与环境保护,1997,8(1):19-26.WANG Sijing.Interaction between human engineering activity and geoenvironment and its environmental effects[J].Journal of Geological Hazards and Environment Preservation,1997,8(1):19-26.(in Chinese)
[4]沈明荣.岩体力学[M].上海:同济大学出版社,2005.SHEN Mingrong.Rock mass mechanics[M].Shanghai:Tongji University Press,2005.(in Chinese)
[5]唐春安,王述红,傅宇方.岩石破裂过程数值实验[M].北京:科学出版社,2005.TANG Chunan,WANG Shuhong,FU Yufang.Numerical test of rock failure[M].Beijing:Science Press,2005.(in Chinese)
[6]徐开礼,朱志澄.构造地质学[M].北京:地质出版社,1983.XU Kaili,ZHU Zhicheng.Structural geology[M].Beijing:Geology Press,1983.(in Chinese)
[7]夏玉成.构造环境对煤矿区采动损害的控制机理研究[D].西安科技大学,2003.XIA Yucheng.Study of control mechanism of tectonic settings on environment hazards related to coal-mining[D].Xi'an:Xi'an University of Science and Technology.2003.(in Chinese)
[8]李玉琳,毕贤顺,张俊文.地表沉陷机理的流变特性分析[J].煤矿开采,2006,11(6):17-19.LI Yulin,BI Xianshun,ZHANG Junwen.Rheological characteristics analysis of surface subsidence mechanism[J].Coal Mining Technology,2006,11(6):17-19.(in Chinese)
[9]刘增勇.地质条件对回采工作面顶板稳定性的影响[J].煤炭技术,2006,25(11):46-48.LIU Zengyong.Composition and structure of geological condition influencing to stability of work face roof[J].Coal Technology,2006,25(11):46-48.(in Chinese)
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