摘要
采用理论分析方法,研究长壁开采条件下三顺槽老顶在工作面不同回采阶段的结构破断特征。研究表明:三顺槽掘成后,老顶未发生破断,这个结构稳定。上区段工作面回采后,老顶在上区段工作面上方和其保护煤柱内断裂、旋转,形成块体平衡结构。下区段工作面回采后,老顶进一步断裂、旋转,形成新的块体平衡结构。
By theoretical analysis,structure failure characteristics of three crossheading main roof were studied under the condition of long-wall mining in different mining phases.The results have shown that,after the three crossheading was done,the main roof didn＇t break and the structure was stable.After the caving of upper working panel finished,the main roof and its protective pillars experienced fracture,rotation,and formation of a balanced block structure.After the lower caving finished,the main roof broke and rotated further and formed a new balanced block structure.
出处
《山西煤炭》
2011年第10期34-35,53,共3页
Shanxi Coal
关键词
长壁开采
三顺槽
力学模型
支承压力
long-wall mining
three crossheading
mechanical model
abutment pressure
