作　　者： ; ; ; ; ;

机构地区： 中国矿业大学矿业工程学院

出　　处： 《煤炭科学技术》 2014年第11期29-32,共4页

摘　　要： 针对顶底板双软型薄煤层综采过程中围岩控制难度大的问题,建立了顶底板双软型薄煤层围岩变形力学模型,并结合现场实际条件,采用FLAC3D数值模拟分析顶底板双软型薄煤层开采过程中围岩塑性区、围岩垂直应力、煤壁前方支承压力的变化规律,得出薄煤层综采时的围岩破坏机理。赵官煤矿1705E工作面实测矿压结果表明:直接顶初次垮落步距为18.2 m;基本顶初次垮落步距为37.8 m,周期来压步距平均为16.0 m;煤壁支承压力在煤壁前方13 m左右明显增大,影响范围为0~25 m;巷道两帮最大移近量为300 mm;巷道顶、底板最大变形量分别为900、500 mm,围岩变形实测数据与数值模拟结果相吻合。 According to high difficult control problems of surrounding rock during a fully-mechanized mining process of thin seam with soft roof and floor,a surrounding rock deformation mechanics model of the thin seam with soft roof and floor was established. In combination with actual conditions of the site,FLAC3D numerical simulation was applied to analyze a surrounding rock plastic zone,surrounding rock vertical stress and support pressure variation law in front of the coal wall during the mining process of the thin seam with the soft roof and floor.A surrounding rock failure mechanism during the fully-mechanized mining process of the thin seam was obtained.The site measured mine pressure results of No.1705E Coal Mining Face in Zhaoguan Mine showed that an initial falling distance of the immediate roof was 18. 2 m,the initial falling distance of the main roof was 37.8 m and the periodical roof pressure distance was 16.0 m in average.The support pressure of the coal wall was obviously increased with a distance of 13 m in front of the coal wall and the influence scope was 0~25 m.The max convergence between the two sidewalls of the gateway was 300 mm.The max deformation of the roof and floor in the gateway was 900 and 500 mm individually.The site measured data of the surrounding rock deformation could be fitted with the numerical simulation.

关 键 词： 矿压规律 围岩变形 应力分布 顶底板双软型薄煤层

领　　域： [矿业工程]