煤巷炮掘过程围岩应力场演化规律的数值研究  

Numerical Study on Stress Field Evolution Law of Surounding Rock in Blast Drivage Process of Coal Roadway

作　　者：夏永军[1] 杨慧明[1,2] 唐兵[1] 

机构地区：[1]煤炭科学研究总院重庆研究院,重庆400037 [2]山东科技大学,山东青岛266510

出　　处：《矿业安全与环保》2010年第3期1-3,共3页Mining Safety & Environmental Protection

基　　金：国家重点基础研究发展计划(973计划)项目(2005CB221503)

摘　　要：煤巷掘进工作面爆破落煤的围岩应力演化是一个复杂的过程。将爆炸引起的冲击波简化为一脉冲分布载荷,以煤矿现场实际条件为基础建立数值研究模型,采用离散元数值模拟软件3DEC的动力学模块对围岩在放炮冲击作用下的动力响应进行了数值模拟,分析了掘进工作面前方煤体的垂直应力与水平应力演化规律。研究表明,在爆破瞬间,工作面前方煤体应力迅速增加,在向前方传播的过程中应力衰减较为迅速,应力的剧烈扰动容易导致煤体失稳而发生动力灾害。The stress evolution of surrounding rock is a complicated process in the blast drivage of a coal roadway. In this paper, the shock wave induced by blasting was simplified as a pulse distribution load, a model for numerical study was established according to the actual conditions of the coal mine, the numerical simulation of the dynamic effect of shock action onto the surrounding rock was carried out by using the dynamic module of numerical sinulation software 3DEC of the discrete element, and the evolution law of both the vertical and horizontal stress in front of the drivage face was analyzed. The study showed that at the moment of blasting, the stress in coal body in front of the drivage face rapidly increased and then rapidly attenuated in the forward propagation process, the severe disturbance of stress may easily lead to the instability of coal body and thus cause the occurrence of the dynamic disasters.

关 键 词：爆破 冲击波 垂直应力 煤巷 围岩应力 

分 类 号：TD311[矿业工程—矿井建设]