露天开采下地下采空区顶板安全厚度的确定

目前国内有不少露天矿山在生产过程中面临着境界内地下采空区的严重威胁。以河南洛钼集团露天开采境界内采空区群为工程实例,根据结构力学和材料力学等理论,综合采用结构力学梁法、K B..鲁佩涅依特理论估算法等进行计算,并对计算结果和三维数值模拟分析结果进行比较,建立了采空区顶板最小安全厚度与采空区跨度之间的对应关系。这对指导露天矿的生产和维护作业人员及设备的安全具有十分重要的意义。

Roof security thickness determination of underground goaf under open-pit mine

At present, many open-pit mine face serious threat of underground goaf in pit limit in china.Take pit limit goaf group of Luomu group in Henan province as engineering instance according to such theories as structural mechanics and mechanics of materials, adopt syntheti-cally structure mechanics of girder and K.B.Lu Peinie estimates to compute and compared the result with three dimensional value simulation analysis result, established corresponding relations between the smallest security thickness of goaf roof and goaf span.This has extremely vital significance for production of open-pit mine and maintenance safety of operating personnel and the equipment.