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针对采空区下工作面顶板压力难以确定的问题,将采空区下工作面顶板结构分为“原生顶板结构”、“类原生顶板结构”和“次生顶板结构”3种类型。采用理论分析与现场实测压力相结合的方法,分析了次生顶板结构时,工作面顶板压力的附加载荷。结果表明,原生顶板和类原生顶板结构时,工作面顶板压力可按原生顶板结构计算;次生顶板结构时,上方采空区矸石会对工作面产生附加载荷,其大小相当于上方已采工作面直接顶的重量。
In view of the problem that the roof pressure in the working face under the goaf is difficult to be determined, the roof structure of the working face under the goaf is divided into “primary roof structure”, “primary roof structure” and “secondary roof structure” 3 types. Adopting the method of theoretical analysis combined with the measured pressure in the field, the additional load of the roof pressure on the working face when the secondary roof structure is analyzed is analyzed. The results show that the pressure of the roof of the working face can be calculated according to the structure of the original roof when the roof is of the same type as that of the original roof and the roof of the original class. When the roof structure of the secondary roof, the waste of the upper goaf will generate additional load on the working face, Top direct top weight.