急斜厚煤层分层与分段放顶煤岩层移动对比  

Comparison of strata movement between section and slicing of top coal mining in steep and thick seams

作　　者：程文东[1] 谢俊文 王更雨 解盘石[1] 

机构地区：[1]西安科技大学能源学院西部矿井开采及灾害防治教育部重点实验室,陕西西安710054 [2]甘肃省煤炭工业局,甘肃兰州730000 [3]甘肃窑街煤电集团有限公司,甘肃窑街730084

出　　处：《煤炭学报》2009年第4期478-481,共4页Journal of China Coal Society

基　　金：教育部新世纪优秀人才支持计划资助项目(CET-04-0972)

摘　　要：运用相似材料模拟和数值计算的方法,对水平分段和倾斜分层放顶煤开采引起的围岩移动特征进行了比较.倾斜分层开采引起的地表下沉盆地倾向主断面水平宽度大,而垂直移动和水平移动量小,水平分段开采则相反;倾斜分层开采时,上覆岩层先弯曲离层,再断裂垮落,易形成铰接结构;水平分段开采时,上覆煤岩易发生巨型块滑动式垮落;倾斜分层开采时,采空区垮落带高度小,水平分段开采时垮落带高度大.倾斜分层开采可以减轻围岩垮落和地表移动的强度.During characterization, a materials similarity test and numerical simulation method were used. The rock movement between the horizontal section of the top coal caving and inclined slicing of the top coal caving was analyzed. According to the analysis, the horizontal scale of the main section in the subsidence basin, which was induced by inclined slicing, is larger, and small displacement in the vertical and horizontal direction occurred, and vice versa to the horizontal section mining. When using the inclined slicing method, the overlying strata first bent, then the roof layer separated and collapsed, and strata structure formed easily. However, a huge block of the overlying strata frequently collapsed when using the horizontal sectioning method. The height of caving zone in mined area, which is induced by the inclined slicing top coal caving, is less than using the horizontal section top coal caving, and the surrounding rock collapse and surface subsidence are reduced.

关 键 词：急倾斜煤层 倾斜分层 水平分段 放顶煤 岩层移动 

分 类 号：TD823[矿业工程—煤矿开采]