Chongqing Vocational Insttute of Engineering NASMG Key Lab of Land Environment and Disaster Monitoring,China University of Mining and Technology

为了分析基岩裸露山区煤层倾角变化对地表移动规律的影响,根据重庆松藻矿区石壕煤矿某工作面的地质、地貌和采矿条件为原型,利用Auto CAD与Sufer软件建立山区地表模型,并采用FLAC3D建立裸露基岩山区不同倾斜煤层开采数值模型。根据模拟结果分析得到:1在采空区边缘区域,地表下沉量与水平移动受山区地表滑移的影响较大,地表斜坡坡度越大,其影响越大;在山顶和山谷区域,地表下沉变化较为平滑;2倾斜煤层开采与水平煤层开采走向方向地表下沉、水平移动特征与规律一致;3随着开采煤层倾角的增大,地表最大下沉量将变小,指向上山方向的地表水平移动值增大;采空区上覆岩层下沉量、地表下沉量沿工作面中心的对称性越不明显,各覆岩层最大下沉量越往下山方向偏移。

in orer to analyze the seam inclination variation affected to the ground surface movement law in a base rock exposed mountain area,according to the geologygeomorphogy and mining condion of a coal mining face in Shitna Mine of Chonging Songzao Mlning Area as a model,the Auto CAD and suter Software were appied to esablish the terain model of the mountain area and a FLAC3 Dwas applied toestabish a numerical mod el of the difrent inelined seam mining in the base rock exposed mounain area. The analysis on the sinulation results showed that frty at the edge area of the goa ,the ground surface suosidence value and horzental movement were highl afcted by the ground suriace sliding in the mounain area and the higher gradient of the surace sope,the igher influences oud b.rt thmountain peak nd the valley areas,the ground surace subsidence vaiation would be smooth.Secondly. he ground surace subsidence and the horzonal movement atures above the inclined seam mining and horizontalseam mining in thesike direcion woud be the same to the law.Final ysith the inc ination of the mining seam increased,he max subsidence value ofthe ground surace would be decreased and the ground surace horizontal movement value at the ise drecion woud be increased.Aong th symneryof the coal mining face cener,the subsid ence value ofthe overburden strata above the goaf and the ground suriace subsidence value would be not more obvious and the max subsidence value of each overburden strata would be offset to the dip direction.

“十二五”国家科技支撑计划资助项目(2012BAB13B03)；重庆市煤炭发展专项资金资助项目(2015ZX017)；