屯留矿软岩巷道变形机制及控制对策研究

Study on Deformation Mechanism and Support Measures of Soft Rock Roadway in Tunliu Coal Mine

针对屯留矿+400 m水平南翼总回风巷出现严重的顶沉、帮缩及底鼓等大变形现象,采用地质调研、现场实测、室内力学实验及数值模拟相结合的方法,对巷道的变形破坏机制和控制对策进行了研究。针对性地提出了深浅孔注浆+锚网索耦合+底角注浆锚管的支护方案,将复合变形机制转化为单一型变形机制,并在井下进行成功应用。

Aiming at the large deformation phenomenon of serious roof falling,floor heaves ,and wall caving of the main air return roadway of southern wing in Tunliu coal mine, studied deformation and failure mechanism of the roadway and support measures by combining the research methods of geological mechanics analysis,site measurement and numerical simulation. Then a pertinent support measure was proposed, which uses deep and shallow grouting ,bolt-net coupled support ,floor grouting bolts and by which the composite mechanical mechanism can convert to the unitary type. Finally the site applying was successful.