摘要
以Knothe动态预计理论为基础 ,引入岩石流变变形力学模型 ,分析回采工作面的开采速度变化、停采对地面建筑物保护的影响。分析结果表明 :在保护建筑物下应保持匀速的开采速度 ;回采工作面停采及开采速度的变化都会引起建筑物的破坏应力增加 ,对地面建筑物保护非常不利 ;在特定的地质采矿条件下 ,存在一个对建筑物不利的开采速度危险区域 ,避开这一开采速度区域开采 。
Based on the Knothe dynamic theory, mechanical model of rheological deformation of rock is applied to analyze the effect of the change and pause of advancing velocity in coal face on surface buildings protection.The results show that under the protected buildings, advancing should be kept uniformly; both pause and change of advancing velocity will be extremely harmful to buildings because of increased damage stress; under special geological and mining conditions, there exists a harmful advancing velocity scope, and avoiding it can effectively reduce the damage stress of buildings by mining.
基金
教育部回国人员基金资助 (教外司留 [1999] 747号 )
陕西省专项基金资助 (0 0JK2 5 3 )
