减摩垫圈对提高锚杆预应力的实测研究  

Field Measurement Study on Low Friction Pad for Increasing Rock Bolt Prestress

作　　者：贾瑞荣 张剑[2] 薛旭辉 李建波[2] 

机构地区：[1]山西汾河焦煤股份有限公司回坡底煤矿,山西临汾031600 [2]天地科技股份有限公司开采设计事业部,北京100013 [3]霍州煤电集团技术研究院,山西临汾031400

出　　处：《煤炭技术》2016年第11期273-275,共3页Coal Technology

摘　　要：在井下煤巷选取顶帮锚杆,分别在有无减摩垫圈等条件下,对锚杆螺母施加预紧扭矩,采用刚体应变式测力计,实测不同扭矩时杆体受力。试验结果表明,减摩垫圈能提高顶锚杆预应力44%,提高帮锚杆预应力41%。Based on the selected roof and sidewall under conditions of with and without low friction rock bolts of underground coal roadway, respectively pads ,measured the bar pulling force on-site under different preloading torque imposed on rock bolt nut,by using the rigid force gauge of strain indicated. Results show that ,low friction pads can increase prestress of roof rock bolt by 44% ,and increase prestress of sidewall rock bolt by 41%.

关 键 词：锚杆 减摩垫圈 预应力 

分 类 号：TD353.6[矿业工程—矿井建设]