山区煤矿采空区地表残余移动变形时空变化规律研究

发布时间：2018-04-15 15:13

本文选题：开采沉陷 + 残余变形预计模型　；参考：《江苏师范大学》2017年硕士论文

【摘要】：我国大部分煤矿位于山区,山区煤矿地下开采后在地表会形成大面积的采空区,给矿区环境造成了极大破坏。随着国民经济的快速发展,大量的工程建设项目处于采空区,在采空区地表上方进行工业及建筑物修建时,对于地表的稳定性评价是非常重要的问题,而影响老采空区稳定性的主要因素是开采残余移动变形,即残余变形量的大小及残余持续时间直接影响着该区域建筑物等设施的变形。针对这些问题,本文主要做了如下工作:(1)在收集、整理三个山区煤矿采空区地表沉陷资料的基础上,通过对地表观测站实测数据、地形图数据的处理,根据开采沉陷学原理以及采动覆岩动态移动分析,揭示了残余移动变形的规律,得到残余移动变形的影响因素,如上覆岩层性质、采煤与顶板管理办法、工作面开采宽深比、工作面位置及持续时间等。(2)分析了残余移动变形产生的机理,得到采空区残余变形的分区性质,利用概率积分法确定其预计参数,建立了残余移动变形的预计模型。(3)利用不同时期测绘的采空区地表地形图,从宏观区域上分析以往布设地表观测站的同一采空区地表的高程变化情况,通过对比该区域高程值的变化得到这一区域的下沉值,并与当年的观测数据相比较,得到这一区域内残余下沉值。(4)根据残余变形的蠕变特性,建立残余变形值与延续时间的负指数相关性函数,并用西曲矿不同年份测绘的地形图数据,验证残余下沉延续时间相关性的正确性。
[Abstract]:Most of the coal mines in our country are located in the mountainous area. After underground mining in the mountainous area, a large area of goaf will be formed on the surface, which has caused great damage to the environment of the mining area.With the rapid development of the national economy, a large number of engineering construction projects are in the goaf. When industrial and building construction is carried out above the surface of the goaf, it is very important to evaluate the stability of the surface.The main factor affecting the stability of the old goaf is the residual displacement deformation of mining, that is, the magnitude of residual deformation and the residual duration directly affect the deformation of buildings and other facilities in this area.In view of these problems, this paper mainly does the following work: 1) on the basis of collecting and sorting out the ground subsidence data in the goaf of three mountain coal mines, through the processing of the measured data and topographic map data of the surface observation station,According to the principle of mining subsidence and the dynamic movement analysis of mining overburden, the law of residual movement and deformation is revealed, and the influencing factors of residual movement deformation are obtained, such as the property of overlying strata, the management method of mining coal and roof, the ratio of width to depth of mining face.In this paper, the mechanism of residual displacement deformation is analyzed, the zoning properties of residual deformation in goaf are obtained, and the predicted parameters are determined by probability integral method.The prediction model of residual movement deformation is established. (3) using the surface topographic map of goaf surveying and mapping in different periods, the elevation variation of the same goaf in the same goaf that used to be set up at the surface observation station is analyzed from the macroscopic area.The subsidence value of this area is obtained by comparing the variation of elevation values in this area, and compared with the observed data of the current year, the residual subsidence value in this area is obtained. (4) according to the creep characteristics of residual deformation,The negative exponential correlation function between the residual deformation value and the continuation time is established, and the validity of the correlation between the residual subsidence duration and the residual subsidence duration is verified by using the topographic map data from different years of Xiqu Mine.
【学位授予单位】：江苏师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD325.3

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