大采高多断层工作面综放诱发地表沉陷观测及数值分析

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摘要从现场监测出发，分析近年来的监测数据，获得王庄矿大采高工作面在高强度综放开采条件下的地表沉陷规律，通过打孔观察冒落带、裂隙带的分布规律，得到最大下沉高度。然后基于不连续变形数值分析方法建立地表沉陷模型，模拟和分析多条断层对工作面综放开采的影响规律，并获得最大下沉高度。模拟最大沉陷值约为4.5 m，要小于实测值4.9 m，可能的原因是数值模型中只考虑该区4条较大的断层，而实际该区还有很多小的断层和小构造，并且实际地质情况远远比数值模型要复杂。最后比较相似条件下有无断层的地表沉陷规律，获得有无断层影响下的覆岩破断规律及移动规律，并比较两者的异同。

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关键词 ：采矿工程, 大采高, 综放开采, 断层, 地表沉陷, 不连续变形分析

Abstract：In-situ observation has been carried out to investigate the surface subsidence law of high-intensity full-mechanized mining in Wangzhuang coal mine in recent years. Through the hole observation，the distribution laws of caving zone and fractured zone have been obtained based on these in-situ observation data；and the maximum subsidence value has also been monitored. Discontinuous deformation analysis(DDA) has been used to simulate the movement and failure of rock strata；and the surface subsidence model is established. Especially，effects of multiple faults on rock strata movement and surface subsidence have been considered in the numerical model. The maximum subsidence value is about 4.5 m based on DDA，which is less than in-situ measurement value of 4.9 m. The main reason is that the effects of four larger faults around the working face have been only considered in the numerical models. However，there are many small faults and other small geologic structures in the actual area. The actual geological conditions are far more complex than that considered in the proposed numerical model. Finally，the surface subsidence laws of working face with and without faults effects which have the similar geological conditions are compared. The laws of fracture and movement of the overlying rock strata with and without faults have been investigated，respectively；and the discrepancy between them has been discussed in detail.

Key words： mining engineering large mining height full-mechanized mining activity fault surface subsidence discontinuous deformation analysis(DDA)

收稿日期: 2011-02-14

引用本文:

杨建立1，2，左建平1，3，孙凯1，2，孟冰冰3，林轩3. 大采高多断层工作面综放诱发地表沉陷观测及数值分析[J]. 岩石力学与工程学报, 2011, 30(6): 1216-1224.
YANG Jianli1，2，ZUO Jianping1，3，SUN Kai1，2，MENG Bingbing3，LIN Xuan3. IN-SITU OBSERVATION AND NUMERICAL ANALYSIS OF SURFACE SUBSIDENCE OF HIGH WORKING FACE WITH MULTI-FAULT INDUCED BY FULL-MECHANIZED MINING ACTIVITY. , 2011, 30(6): 1216-1224.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/I6/1216

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