旧巷改造的锚固技术方案

通过对巷道围岩现状调研,确定了适宜的支护原则:中等支护强度原则、预紧力及预紧力扩散原则和及时支护原则。依据大厚度锚固板理论和整体锚固结构理论制定了合理有效的锚固支护方案,支护效果甚佳。现场矿压监测发现旧巷具有变形小,短期即可稳定,锚杆(索)受力小,锚固结构仍有较大承载潜能特点。

Anchoring Technique Scheme During Old Roadway Renovation

By investigating the present situation of roadway surrounding rock,the paper determines the appropriate supporting principle,including medium support strength principle,pretightening force and pretightening force spread principle and timely support principle.Based on thick anchor board theory and bolted strata structure theory,the paper makes a reasonable effective anchor support scheme,the effect is really desirable.The result of mine pressure monitoring shows that old roadway has little deformation,which can keep stable in short-term,anchor cable and anchor bolt force is small,the anchor structure still has large bearing potential characteristics.