The Applied Research Of Flexible Formwork Concrete Structure In Soft Rock Roadway Gob-side Entry Retaining Laneway

Soft mold concrete structure consists of a flexible formwork and concrete structure, it isthe flexible template fixed to the perimeter, will need not vibrating of self-compactingconcrete to flexible template by concrete pump,between the goaf and the roadway pouring aclosed continuous concrete wall, and the original roadway supporting form a whole, sharedmining dynamic pressure, maintaining roadway stability.This thesis based on the flexible formwork concrete gob-side entry in the L4406coalmining face of Lingxin Coal Mine，solid modeling method is adopted for soft mold concretestructure using Midas GTS finite element numerical simulation software， analyze thestructural strength and stability，to guide the actual construction of reinforcement of weakpositions.Through roadway along goaf rock control theory and tunnel support design，roadside support design and temporary support design. Based on this put forward theconstruction technology of soft rock tunnel excavation and the quality control standards.Butalso the need for mine pressure monitoring for along the lane beside the soft formwork forconcrete supporting structure, optimize deficiency, the whole construction process will bemore suitable for soft rock tunnel excavation.This paper studies the soft mold concrete structure along the empty left lane has thefollowing innovative：①For the first time the implementation of soft mold concrete along theempty left lane support technology in complex geological conditions of soft rock, and createdunder the condition of complex soft rock along the lane for the supporting mode.②For thefirst time in the successful implementation of soft rock roadway flooding soft moldedconcrete pumping Gob technology, supporting molding better.③For the first time theimplementation of soft model pump concrete along the empty left lane technology in thickcoal seam working face of the lane, along the empty left lane for soft mold concrete technology in thick coal seam in the further development and application of subsequent laid afoundation.