综放沿空掘巷窄煤柱受力变形与应力分析

Mechanical deformation and stress analyses of the narrow pillar of road driven along next goaf for fully-mechanized top-coal caving face

根据综放沿空掘巷的力学环境建立了窄煤柱的弹塑性力学模型,运用全量理论的变分原理研究窄煤柱的位移及应力分布特征,初步得到了窄煤柱内的位移场、应力场分布规律,为窄煤柱稳定性及控制技术的研究提供了理论依据。

In terms of mechanical surroundings of the road driven along next goaf for fully-mechanized top-coal caving face, an elastic-plastic mechanical model of the narrow pillar is established. By variation principle of total theory of plasticity, the distribution characteristics of the displacement and stress in the narrow pillar are discussed, and the distribution laws of the displacement field and the stress field in the narrow pillar are obtained preliminarily. The results can provide a theoretical basis for the study on the stability and the control of the narrow pillar.