【作者】 葛民荣；

【导师】 刘鸿福；

【作者基本信息】 太原理工大学 ， 地球探测与信息技术， 2005， 硕士

【摘要】 滑坡是一种多发性的地质灾害,其危害极为严重,不仅给人类生命安全带来威胁,而且给财产、环境和资源等带来破坏。由于牛头嘴滑坡对附近人民群众的生命财产安全构成了威胁,因此查清其现状特征和给出其稳定性评价是急需的。 本文对牛头嘴滑坡进行实地调查后,认为牛头嘴滑坡是由四个滑坡体组成的滑坡群,其组合类型为后部采动滑坡推挤前部老滑坡群的特殊滑坡。本文通过对牛头嘴滑坡群的形成和演化进行了分析,认为新华夏系构造运动形成的杜儿坪正断层,其上盘由于独特的地形地质条件,发育形成了牛头嘴老滑坡群,该滑坡群在后期的地下采煤影响下,其上覆岩体的应力条件遭到了破坏,再加之后部采动滑坡的推挤作用而使老滑坡群再次变形和破坏。 本文分析了采煤沉陷对牛头嘴滑坡群造成的影响,认为地下采煤形成采空区所引起的缓倾斜边坡变形机制为:由于地下采煤形成采空区,造成了采空区顶板岩层的离层,从而引起岩体水平和垂直变形,使上覆岩体中的软弱结构面发展成滑移面,当上覆山体克服滑带的抗滑力,边坡便可发生蠕滑而变形。 最后,本文利用变形形迹法和地貌演化历史法,对牛头嘴更多还原

【Abstract】 Landslide is one of frequently geological calamities, which hazard is very serious. It not only terribly endangers human beings’ lives, possessions, but also destroys eco-environment and resources. Niutouzui landside group threatens the lives and belongings of people in Niutouzui village at all times. So it is necessary to clarify the status and to evaluate the stability of Niutouzui landslide group at present.After field survey, this thesis puts forward that Niutouzui landslide group composed of four landslide slopes is a special combined landslide type where the rear mining landslide jostling the frond old landslide group. Through analyzing the deformation and evolvement of Niutouzui landslide group, the thesis suggests that the new Huaxia series tectonic movement formed the Duerping normal fault. Ascribe to the particular landform and geology conditions, the upfaulted block of this fault developed into Niutouzui old landslide group. The balanced stress conditions of the top rock of Niutouzui old landslide group were disturbed under the influence of the later underground mining; in addition, the jostling effect of the rear mining landslide cannot be neglected. All thesefactors aroused new distortion and breach in the old landslide group.Analyzing the influence which the mining subsidence bring about on Niutouzui landslide group, the thesis illustrates the slope deformation mechanism formed by underground mining arousing the mined-out zone as follows.The underground mining aroused the mined-out zone, giving birth to the absciss layer of the top rock of the mined-out zone, and then arousing the horizontal and vertical distortion of the rock, and bringing the feebly structural surface in the top rock into the slippage surface. When the top rock overcomes the anti-slippery force, the slope will develop creeping and be deformed.At last, the thesis makes use of the methods of deformation path and geomorphic history to analyse the stability of Niutouzui landslide group and to monitor the landslide group by the means of radon measurement. The thesis suggests the whole landslide is being on the steady state at present; the front part is developing the creep deformation while the rear is in the period of relative stability state.Researches on Niutouzui landslide group in this thesis provide some basic data for the prevention and cure of Niutouzui landslide group at this time. However further engineering exploring on Niutouzui landslide group are still needed to be done in order to find out the feature of structural dynamics about the slippage zoneand to work out the qualitative evaluation of stability, and to provide further scientific decision for the prevention and cure at last.更多还原