煤矿安全2017，Vol.48Issue(12)：203-206,4.DOI:10.13347/j.cnki.mkaq.2017.12.054
下保护层开采对上覆巷道围岩稳定性的影响
Study on Influence of Lower Protective Seam Mining on Stability of Roadway Surrounding Rock
摘要
Abstract
In order to study the stability influence of upper protective seam mining on overlying roadway surrounding rock,taking 1331 transportation roadway located above 11# coal seam of Dingji Mine as research object,we carry out numerical simulation research for the surrounding rock stress,deformation and changes of bolt axial force.The results showed that the 1331 transportation roadway has a dynamic effect with mining 11# coal seam,according to the dynamic impact,roadway can be divided into three regions:mining influence region,intense mining influence region,and postharvest unloading region;change rule of roadway surrounding rock deformation and bolt axial force is almost the same,the largest growth region is located in the range at the front of working face 10 m to the rear of 40 m,belongs to the range of intense mining influence region.Surrounding rock stress shows a trend of decrease negative exponential function,the vertical stress and shear stress respectively decreased 20.917 MPa and 6.96 MPa,decreasing amplitude is 44.24％ and 38.03％.The scope of surrounding rock region affected by upper protective seam mining is about 50 m,the degree of surrounding rock roof influence region is bigger,accumulative settlement is 165 mm to 248 mm.关键词
下保护层开采/上覆巷道/采动影响/围岩稳定性/锚杆轴力/数值模拟Key words
lower protective seam mining/overlying roadway/mining influence/surrounding rock stability/bolt axial force/numerical simulation分类
矿业与冶金引用本文复制引用
郭世儒,茅献彪,缪盛凯,张连英..下保护层开采对上覆巷道围岩稳定性的影响[J].煤矿安全,2017,48(12):203-206,4.基金项目
国家自然科学基金仪器专项资助项目(51227003) （51227003）
国家自然科学基金重点资助项目(50834005) （50834005）
“333工程”科研资助项目(BRA2015065) （BRA2015065）
