采矿与安全工程学报Issue(5)：760-764,5.DOI:10.13545/j.cnki.jmse.2015.05.010
考虑围岩离层影响的端部锚固锚杆荷载分析及其支护设计
The analysis of end anchoring-grouting prestressed anchor loading and support design with bed separation considered
摘要
Abstract
Roof bed separation often occurs due to the deformation incoordination of surrounding rock in the process of the excavation of mine roadway. Bed separation has effect on the bolts, and the estima-tion of the influence will directly affect the safety of support systems. The stress distributions of syste-matic bolt has been obtained, considering the pre-tightening force of end anchoring-grouting bolt and the additional stress caused by roof bed separation. The results have shown that under the influence of roof bed separation, anchorage axial force and shear stress will all increase.Anchor failure happens easily when bed separation value is too large, which will produce the potential safety hazard. Finally, the effects of bed separation have been taken into consideration in the bolting design, and a new bolt design concept has been provided. It has been proved that the bearing capacity design method after considering roof bed separation is safer and more reasonable.关键词
顶板离层/端部锚固/预紧力/锚杆荷载/支护设计Key words
roof bed separation/end anchoring-grouting/prestress/bolt loading/supporting design分类
矿业与冶金引用本文复制引用
谷拴成,丁潇..考虑围岩离层影响的端部锚固锚杆荷载分析及其支护设计[J].采矿与安全工程学报,2015,(5):760-764,5.基金项目
国家自然科学基金项目(51508462)；陕西省教育厅科研项目(2013JK0961) （51508462）
