复合顶板条件下沿空留巷力学参数研究

Researchonthe Mechanical Parameters of Gob-side Entry Retainingunder the Condition of Composite Roof

以军城煤矿31203复合顶板薄煤层综采工作面为工程背景,在采用无煤柱护巷技术的基础上,建立了沿空留巷围岩力学模型,对巷旁支护阻力、切顶力学参数、顶板下沉量等进行了计算,并采用FLAC3D数值模拟软件研究了复杂顶板条件下薄煤层大断面沿空留巷力学参数,为该矿复合顶板条件下薄煤层大断面沿空留巷力学参数的确定提供了理论依据。

Taking the 31203 full-mechanized working face under composite roof with thin coal seam in the military city coal mine as the engineering background,the mechanical model of surrounding rockabout gob-side entryretaining is established and parameters of the support resistance,cutting off resistance and roof convergence are calculated based on adopting the technology of roadway refused protection coal pillar. Besides that,the mechanical parameters of gob-side entry retaining under the condition of composite roof are researched based on the numerical simulation software FLAC^3D so as to provide theoretical basis for determining the mechanical parameters of gob-side entry retaining under the condition of composite roof with thin seam and large section.