开采矿床最困难的工作是保证采场顶板水平暴露面的稳定。采场顶板允许跨度的绝对值是一种重要的采矿技术特性,在很大程度上决定采矿效率的技术经济指标。采场跨度越大,采准切割工程单位费用和矿柱损失就越小。开采缓倾斜有色金属矿床的采场支护参数及其跨度尺寸列于表1。 The most difficult task of mining the deposit is to ensure the stability of horizontal exposed surface of the stope roof. The absolute value of the allowable span of the stope roof is an important mining technology characteristic, which is largely a technical and economic indicator of mining efficiency. The larger the stope, the smaller the unit cost of quasi-cutting engineering and the loss of pillars. The parameters of mining stope support and the span dimensions for mining gently inclined non-ferrous metal deposits are shown in Table 1.