论文部分内容阅读
为分析煤巷煤帮的稳定性,将巷道顶板视为梁,煤帮弹性区视为弹性基础,煤帮塑性区垂直应力视为作用在梁上的载荷,建立了考虑顶板和煤帮相互作用的煤帮稳定性分析力学模型,应用梁理论和弹塑性极限平衡理论推导了顶板弯曲方程和煤体中的应力表达式,采用数值方法确定煤帮塑性区宽度,根据顶板下沉量估算煤帮的水平位移,从而提出了一种预测煤巷煤帮稳定性的方法,并给出了算例,验证了分析结果的合理性.
In order to analyze the stability of coal gangue, the top of the roadway is regarded as beam and the elastic zone of coal gangue as the elastic foundation. The vertical stress of plastic zone of coal gangue is regarded as the load acting on the girder. The interaction between roof and coal gangway is established Of the coal to help stability analysis mechanics model, application of beam theory and elastic-plastic limit equilibrium theory derived roof bending equation and stress in the coal body, the numerical method to determine the width of coal to help plastic zone, according to the amount of roof subsidence estimated coal gang A method of predicting coal gangue stability is proposed, and an example is given to verify the rationality of the analysis results.