煤炭与化工2023，Vol.46Issue(11)：18-24,7.DOI:10.19286/j.cnki.cci.2023.11.005
锚杆与锚索协同锚固的能量分析研究
Energy analysis of synergetic anchorage with bolt and anchoring cable
张新过 1党鹏远 2朱初初2
作者信息
- 1. 河南能源化工集团永煤公司城郊煤矿,河南商丘 476600
- 2. 中国矿业大学力学与土木工程学院,江苏徐州 221008
- 折叠
摘要
Abstract
The deformation,failure and instability of surrounding rock in underground engineering are always accompanied by the transformation and transfer of energy.The application of support body has a certain control effect on the deformation and instability of surrounding rock,and it must also affect the transformation and transfer of energy in anchorage body and surrounding rock.Based on Mohr-Coulomb criterion,the distribution and influence factors of elastic strain energy and plastic strain energy in surrounding rock after excavation of circular roadway was analyzed.It was pointed out that among the mechanical parameters of surrounding rock in fractured zone,cohesion had greater influence on energy distribution than internal friction angle.Grouting and improving the prestress of bolt could increase the cohesion of rock mass.The increase of cohesion could reduce the range of broken zone,but it would aggravate the agglomeration of plastic energy.It was necessary to provide uniform supporting force for anchor body with combined anchor cable to weaken the agglomeration effect of plastic energy of surrounding rock.In order to ensure that the anchor rod and the anchor cable worked together,the prestress must be matched with each other,and the prestress of the anchor rod and the anchor cable should be matched with the elastic modulus of the anchor rod.While reducing the scope of the crushing zone,the degree of agglomeration of plastic failure energy was weakened,the elastic energy of surrounding rock was reduced,and the surrounding rock was in a stable state of less crushing,uniform crushing and low energy.关键词
能量分析/应变能密度/协同锚固/预应力/围岩弹性能/巷道稳定性Key words
energy analysis/strain energy density/synergetic anchorage/prestressing/elastic energy of surrounding rock/roadway stability分类
矿业与冶金引用本文复制引用
张新过,党鹏远,朱初初..锚杆与锚索协同锚固的能量分析研究[J].煤炭与化工,2023,46(11):18-24,7.
