Mechanical characteristics and stability control technology of deep roadway under high stress

Specific to Jiulong Coal Mine-890 meters air inlet pedestrian roadway has serious deformation and destruction due to its complicated engineering geological conditions,large chamber cross section and significant effects of high stress.The paper carried out quantitative analysis of the mechanical characteristics of surrounding rocks of roadway through FLAC3 Dnumerical simulation to obtain deep highstress roadway stress and strain evolution characteristics,combining with composition analysis,mechanical test results of surrounding rocks of roadway.Based FLAC3 Dcontrast optimization deep and high stress roadway combination support programs,explore supporting structure,supporting the reliability parameters,the author proposed the wire rope combined supporting scheme taking the anchor bolt and anchor cable as the core.Making the mine pressure observation after the roadway excavation,further verify the rationality of the supporting scheme and the result of numerical simulation,and monitoring the variation characteristics of surrounding rock.Engineering practice shows that adopting the bolt-anchor-shotcrete-mesh combined supporting scheme in the deep roadway under high stress,to effectively improve the integrity and the stability of the roadway.The surrounding rock stress becomes more stability,and the deformation gets more effective control,providing the technical support for the safety and efficient production in the coal mine.