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将工程实践中接触到的留巷顶板分为厚层直接顶、薄层直接顶和无直接顶3种类型,利用叠加连续层板模型,考虑巷帮煤体承载作用和导致顶板垮落诱因,得出了3种顶板条件下的巷旁支护阻力计算公式。研究表明,巷帮煤体、充填区域顶板承载性能的提高有助于降低巷旁充填体支护阻力。随直接顶厚度的减小,充填体支护阻力反而增大。基本顶层位不同,顶板垮落诱因不同。厚层直接顶时,顶板垮落为自重引起;薄层直接顶时,顶板垮落为基本顶上位岩层作用所致。
The roof of the retaining gateway which is contacted in engineering practice is divided into three types: thick direct top, thin direct top and no direct top. Based on the superimposed continuous laminar model, taking into account the bearing function of roadway coal and the cause of roof caving, The calculation formulas of roadside support resistance under three roof conditions are obtained. The research shows that the improvement of bearing capacity of the coal roof and the roof in the filling area helps to reduce the resistance of the roadside filling body. With the decrease of the thickness of the direct top, the support resistance of the filling body increases instead. The basic top level is different, roof caving different incentives. When the top of the thick layer is directly roofed, the falling of the roof is caused by its own weight; when the roof is directly roofed, the roof caving is caused by the action of the basic roof layer.