综放开采顶煤冒放性的损伤力学分析  

STUDY ON FALLING ABILITY OF TOP COAL DURING TOP COAL CAVING BY DAMAGE MECHANICS

作　　者：陈忠辉[1] 谢和平[1] 林忠明[1] 

机构地区：[1]中国矿业大学(北京校区)岩石力学和分形研究所,北京100083

出　　处：《岩石力学与工程学报》2002年第8期1136-1140,共5页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金(19902019的59734090);煤炭科学基金(97采10204)资助项目。

摘　　要：运用损伤力学的基本原理,阐述了综放开采顶煤在支承压力作用下损伤演化与冒放性之间的关系。利用细观统计损伤力学建立了损伤参量的计算模型,把顶煤损伤参量作为冒放性指标加以研究,并讨论了开采深度、煤层强度、原始裂隙和水平应力对顶煤冒放性的影响,其理论结果和现场实际相吻合。The relation between the falling ability and damage of top coal is studied by damage mechanics. The model of damage parameter of top coal is found using meso-statistical damage mechanics. The damage parameter of top coal is regarded as the index of falling ability. Some factors,such as the mining depth,the strength of coal seam, initial crack and horizontal stress,which affect the falling ability of top coal,are discussed. The theoretical results are well agreeable with the experimental results.

关 键 词：综放开采 冒放性 损伤力学 顶煤 

分 类 号：TD324.1[矿业工程—矿井建设]