煤矿巷道顶板离层临界值和预警值的研究

Research on Critical Value and Warning Value of Roof Separation Layer in Coal Mine Roadway

介绍了顶板事故对煤矿的危害以及引起顶板离层的原因,研究了判断顶板离层的方法。用支护材料延伸率和多因素法进行离层计算,确定顶板离层的临界值和预警值。通过安装在顶板上的离层仪的行程读数观测顶板浅基点和深基点的离层大小,进而判断顶板破坏情况,根据顶板破坏程度采取相应的治理措施,达到加固顶板实现安全生产的目的。通过对2种判断方法的比较,支护材料延伸率法更加直观和简便,可操作性更强,煤矿通常采用支护材料延伸率计算的方法进行巷道顶板离层值的确定。顶板离层预警值和临界值的确定,能为煤矿顶板管理提供重要帮助,为顶板支护设计提供依据,解决了顶板安全管理的问题。

Introduced the harm of roof accidents to coal mines and the reasons for roof separation,and studied the methods for judging roof separation.Calculated the delamination using support material elongation and multi factor method,and determined the critical value and warning value of roof delamination.By observing the separation size of the shallow and deep base points of the top plate through the travel reading of the separation instrument installed on the top plate,the damage to the top plate can be determined.Based on the degree of damage to the top plate,corresponding treatment measures can be taken to reinforce the top plate and achieve the goal of safe production.By comparing the two judgment methods,the elongation of support materials method is more intuitive and convenient,with stronger operability.Coal mines usually use the method of calculating the elongation of support materials to determine the separation value of the roadway roof.The determination of the warning value and critical value for roof separation can provide important assistance for coal mine roof management,provide a basis for roof support design,and solve the problem of roof safety management.