摘要
为了有效控制大采高综采工作面煤壁的位移,以某矿504工作面为研究背景,利用理想弹塑性应变软化模型,建立了大采高工作面煤壁位移的计算模型,得出煤壁表面各点的位移解;建立了大采高工作面数值计算模型,模拟分析了不同采高时工作面煤壁表面的位移及塑性区变化规律,得出煤壁片帮主要发生在煤壁中上部。根据大采高煤壁片帮的机理,从改进机械装置、优化采矿技术等几个方面提出了应对措施。
In order to effectively control coal wall stability of fully mechanized coal face with large mining height, a calculation model for coal wall displacement of fully mechanized coal face with large mining height was built by taking 504 working face of a mine as the study background and using the ideal elastic and plastic strain softening model, and the coal wall displacement solution at every point on the coal wall was obtained. A numerical calculation model for the working face with large mining height was also built, simulation analyses was made on the changing laws of the displacement on the coal wall surface and the plastic zone in working face with different mining height, and it concluded that the coal wall fall mainly happened in its middle and upper parts. Based on the coal wall fall mechanism of the working face with large mining height, corresponding measures were proposed from the aspects of improving mechanical devices, optimizing mining technology and so on.
出处
《矿业安全与环保》
北大核心
2014年第2期45-48,共4页
Mining Safety & Environmental Protection
关键词
大采高
综采工作面
片帮
弹塑性应变软化
large mining height
fully mechanized coal face
coal wall caving
elastic-plastic strain softening
