Study On Roadway Supporting Under Goaf Technology Of Sanhekou Coal Mine

The paper is supported by the 2315 mining roadway in No.3 of Sanhekou Coal Mine in Weishan,Jining,Shandong Province,by the ways of analysis of the theory,numerical simulation and engineering practice methods.Focus on the coal seam group at a close situation,Non-parallel mining roadways and upper goafs in the strike direction of the lower strata,Study on supporting problems in relation to internal and external staggered position in mining roadway and goaf,By analyzing the distribution of the stress upper the mining roadway in the 23 15 working face under the lower 3rd stratum,to optimiz the supporting scheme.By analyzing and studying the evolution mechanical characteristics of the overlying strata space formation process on the upper 23 15 working face,The formation process and the scope of the stress field generated in the lower rock proposed.The distribution of internal and external stress in the pressure unloading zone and stress concentration zone formed the lower rock stratum after the stabilization of the goaf is clarified.The numerical simulation software FLAC3D is used to reserach different regions along the groove of the stress analysis in different ways of supporting strength and the bolts can effectively achieve the precision of'roadway supporting,to ensure the safety of gateway to use.The article introduces that stress under gob roadway,meet the section of the gateway support requirements.From ratio of bolts,anchor cable construction technology and quality requirement in the three aspects,such as the different extents of transportation tunnel supporting analysis and research,combined with observation and numerical simulation software of coal mine at the same time as a result,ensure suitable slot outside wrong cases lies in the different sections,to support the adjustment on the strength and means,to verify the precision of roadway supporting ideas the results obtained under complex geological conditions.