综放工作面回撤巷道支护方案设计

Large section of the supporting retracement channel has become a thick loose coal mine to achieve high yield and high production of one of the problems need to be resolved.Bedrock for Zhungeer thin coal,coal seam thickness,coal quality characteristics such as broken loose,using a variety of supporting the theory of the retracement channel support scheme.The results show that the main support scheme two retracement channel in the mining practice of supporting the success of the end of the period taken to effectively control the retracement channel distortion,the period required to ensure that the retracement channel cross-section.