【作者】 张旭和；

【导师】 李东印； 付凯；

【作者基本信息】 河南理工大学 ， 采矿工程， 2011， 硕士

【摘要】 不连沟井田位于华北地层区鄂尔多斯分区准格尔煤田北部,其F6201综放工作面具有近浅埋、巨厚煤层和综放开采三个特点。为了研究该条件下上覆岩层的运移和矿压显现规律,采用了理论分析、现场实测和数值模拟相结合的综合手段。理论分析方面。首先利用断裂带基本顶判别准则,找到了F6201综放面断裂带基本顶的存在位置,然后以此为基准,利用关键层判别准则自下而上找出工作面覆岩中关键层的个数与层位,并对其进行了关键层复合效应判别,最后在关键层初次和周期垮落力学结构模型的基础上对关键块进行了稳定区域划分,从理论上分析了关键块的运动形式和整个覆岩的破断情况。现场实测方面。首先通过对现场数据的收集、整理、分析,逐步摸清了F6201综放面矿压显现基本规律,然后以此为依据反映、推演出F6201综放面覆岩破断情况,最后与理论分析结果进行对比修正,进一步确定F6201综放面覆岩破断规律。数值模拟方面。在理论分析和现场实测的基础上,通过UDEC数值模拟软件再现F6201综放面覆岩宏观破断规律。模拟重点是关键层破断之间的时空关系和关键层破断对表土层沉陷的影响。通过模拟,加深了对F6201综放面覆岩运移规律的认识和理解。在整个研究过程中,上述三种研究手段相互联系,相互印证与修正。最后得出近浅埋巨厚煤层综放开采覆岩层运移规律。更多还原

【Abstract】 Buliangou colliery is located in north part of Zhun Ge Er coalfield ,Erdous plateu coal-seam of north China strata. The F6201 face in Buliangou mine has three remarkable characteristics: shallow burial depth, extremely thick coal seam, fully-mechanized caving mining.In order to study the overlying strata movement regularity and strata pressure behavior law, this paper combines theoretical analysis and field measurements with numerical simulation to study it synthetically.Theoretical analysis:firstly finds the position of main roof in breaking zone,secondly uses the criterion for determining the key stratum to determine the numbers and the position of key stratums,then discriminants the complex effect of key stratum,finally based on the mechanical structure model for key blocks, stable zones of key blocks are divided , analyses the movement of key blocks and the breaking of overburden from theoretical aspects.Field measurements:through the collection ,reorganization and analysis of field datas, strata pressure behavior law of F6201 work-face is gradually found,which can be used to inverse the breaking regularity of overburden, finally compared with results of theoretical analysis, the breaking of overburden for F6201 work-face is confirmed further.Numerical simulation: on the basis of theoretical analysis and field measurements,by the use of UDEC software , the macroscopical breaking law of overburden for F6201 work-face is reappeared. Spatial-temporal relation with key stratums’breaking and the influence to topsoil layer’subsidence are simulated emphasisly,from which can deepen understanding and knowledge to the movement regularity of overlying strata.During the whole research,the threee methods are interrelation and mutual corresponded, finally the study concludes the law of strata pressure behavior with shallow seam, thick bedrock ,extremely thick coal seam, and fully-mechanized caving mining.更多还原