摘要
根据巷道围岩应力变化特点结合锚固体变形破坏的相似材料模拟试验， 分析了巷道两帮锚固体的变形破坏特征， 指出锚杆支护巷道两帮表面主要发生张性破坏， 锚固体内部发生剪切破坏， 据此建立起回采巷道锚杆支护两帮稳定的分析模型， 提出了两帮稳定的判别准则， 即锚固体中锚杆的拉应变必须小于锚杆的允许拉应变， 在巷道两帮围岩较松软时，
Bolting is a conceal engineering.The stability of surrounding rock around roadway is very important.Based on the variety characteristics of surrounding rock stress around roadway and similitude material simulation tests,the deformation and failure feature of bolted rock body are analyzed.It points out the tension fracture occurrence in the surface of two sides of roadway using bolt and shear fracture occurrence inside the bolted rock body.The model analyzing the stability of two sides of roadway supported with bolted is hereby built up,and a criterion judging the stability of its two sides is proposed.Namely,tensile strain of bolt in the bolted rock body must be less than its permissible value.The circumference displacement is also satisfactory in soft rock.
出处
《焦作工学院学报》
1999年第5期317-321,共5页
Journal of Jiaozuo Institute of Technology(Natural Science)
