采矿与安全工程学报2016，Vol.33Issue(3)：415-422,8.DOI:10.13545/j.cnki.jmse.2016.03.007
受上覆采空区影响的巷道群稳定性控制研究
Stability control of the roadway group under the influence of overlying goaf
摘要
Abstract
During the downward mining process of close-distance coal seam,affected by the upper coal goaf and pillar, complex changes have occurred in the stress environment and the failure mecha-nism of the roadway surrounding rock in the lower coal. The stress distribution law, the deformation failure mechanism and stability control of the roadway group in the lower coal were researched through the comprehensive methods of theoretical analysis, numerical simulation and engineering application. The research has shown that:1) The pressure relief effect of overlying goaf led to low stress concentra-tion degree of roadway under goaf and more stable surrounding rock;2) Affected by the pressure transfer of coal pillar, the vertical stress was on a sharp rise with the stress concentration factor reaching 3.84, and large compression-shear failure appeared in two sides and shoulders of the roadway, which eventually led to the whole failure; 3) Roadway in the high stress zone under the coal pillar should adopt the arched section to increase the supporting strength and the anchor prestress; and the cables (bolts)layout in the roadway shoulders to make the supporting system couple with the plastic zone of surrounding rock and both get strengthened. With the optimized support, the roadway roof subsidence is reduced by 42.8%, the actual measured working load of the bolts and cables is reasonably distributed, which realiz-es the safe and effective control of the roadway of close distance coal seam under coal pillar.关键词
近距煤层/应力分布规律/围岩破坏机理/巷道稳定性控制Key words
close-distance coal seam/stress distribution law/surrounding rock failure mechanism/roadway stability control分类
矿业与冶金引用本文复制引用
苏学贵,宋选民,原鸿鹄,杜献杰..受上覆采空区影响的巷道群稳定性控制研究[J].采矿与安全工程学报,2016,33(3):415-422,8.基金项目
国家自然科学基金项目(51274145)；深部岩土力学与地下工程国家重点实验室开放基金项目(SKLGDUEK1311)；山西省自然科学基金项目(2015011066) （51274145）
