房柱式开采残煤复采顶底板应力分布规律的数值模拟研究  

Numerical Simulation Study on Stress Distribution in the Roof and Floor for Repeated Mining of Residue Coal after Pillar and Chamber Mining

作　　者：刘大鹏[1] 唐海波[1] 赵阳升[1] 

机构地区：[1]太原理工大学采煤工艺研究所,太原030024

出　　处：《太原理工大学学报》2014年第3期389-393,共5页Journal of Taiyuan University of Technology

基　　金：国家科技支撑计划(2012BAB13B04)

摘　　要：以山西晋城市西河煤矿残煤资源长壁法复采工程为背景，建立房柱式残煤长壁复采的三维有限元模型，采用有限元模拟了残煤复采过程并计算顶底板应力分布。结果表明：房柱式残煤复采过程中顶底板应力增高区较整装煤层综采增加5～10m，工作面通过空巷时顶底板应力突然增加1．5～2．5倍，对支护设备影响较大。采出面积比越小、煤柱面积越小则顶底板应力的变化率越大。揭示了房柱式残煤复采过程中的矿压显现规律，对相似条件下的残煤复采具有指导意义。On the basis of the project of longwall repeated mining of Xihe coal mine in Jincheng, Shanxi, this article applied finite element to simulate the process of repeated mining and calculate the stress distribution of roof and floor by establishing a three dimensional finite element model of pillar and chamber longwall repeated mining. The result shows： the stress-concentrated area of roof and floor in repeated mining increased 5-10 m than fully-mechanized coal min- ing; when the working face passed the lane, the stresses of roof and floor increased suddenly by 1.5-2.5 times, which would have a great impact on the supporting equipment; the smaller the mined area ratio or area of coal pillar was, the greater the change rate of roof and floor stress became. This research also reveals the mine pressure behavior in repeated mining of residue coal after pillar and chamber mining process and has guiding significance for the residual coal repeated mining under similar conditions.

关 键 词：房柱 残煤复采 顶底板 应力分布 

分 类 号：TD823.88[矿业工程—煤矿开采]