Study on Composite Layered Roof Support Technology in Deep Mining Roadway in a Mine
Taking the 40303 working face of a coal mine as the research background,through the me-chanical analysis of the composite rock beam generated by the anchorage of the composite layered roof,the calculation formula of the maximum tensile stress at the lower side position is derived,and the length of the bolt is further determined,and the field application is carried out.According to the field monitoring data,the composite rock beam formed by anchoring can effectively bear large overlying vertical load and horizon-tal structural stress,and the supporting scheme adopted can also effectively control the deformation of the composite roof,which obtains good supporting effect.
deep mining roadwaycomposite layered roofcomposite beamsupport technology
万方数据
维普
