Numerical Simulation-based Study of Damage Extension in the Plastic Zone of Surrounding Rock under Different Conditions of Anchor Cable Length and Inter-row Spacing
This article takes the coal pillar between the 1503 transportation roadway and the 1505 return airway in the fully mechanized mining face of the 5#coal seam in Shaozhai Coal Industry as the engineering background.With the help of numer-ical simulation software,the control effect of the surrounding rock of the roadway under different lengths,spacing,and row spacing of anchor rod support is simulated and studied.The damage expansion and deformation control effect of the plastic zone of the surrounding rock in the 1505 return airway are analyzed.Research has found that there are significant differences in the control effect of surrounding rock under the combined support conditions of anchor net cable spraying with different an-chor rod lengths.The support effect is relatively significant for anchor rods with a length of 2500 meters.As the anchor rod length increases,the support strength improves,and the control effect on the damage expansion and deformation of the plastic zone of the surrounding rock in 1505 return airway becomes better;When the spacing between anchor rods decreases,the sup-port strength increases,and when the spacing between anchor rod rows decreases,the support strength increases.And anchor cables have the same characteristics,the longer the length and the smaller the spacing between them,the more significant the support strength,and the better the damage expansion and deformation control effect on the plastic zone of the surround-ing rock.
万方数据
维普
