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铜陵有色金属公司狮子山铜矿,自1971年,对西狮子山矿段Ⅱ、Ⅲ、Ⅳ、Ⅴ(以下简称Ⅱ～Ⅴ)号盲矿体进行合并开采,形成了一个逐步扩大的大型盲采空区,1976年这一采空区体积为23万 m~3。空区下部尚有425万 t 矿石储量待采,采出这些矿石,该空区体积将扩大到200万 m~3。为在不进行强制崩落顶板围岩处理采空区的情况下,使用暂留矿石垫层的采矿方法。安全高效率的采出这些矿石,开凿直通地表的天窗是必须采取的安全措施。天窗开在顶板围岩中间,于1976年用强制崩落的手段开通。11年来,Ⅱ～Ⅴ号矿体又采出矿石176万 t,采空区体积已扩大到110万 m~3,天窗对-40m 以下各中段的安全开采和诱导顶板围岩局部冒落、改善垫层条件,起了重要作用,下面介绍采矿方法及空区天窗开凿与应用经验.
Since 1971, the Lion Rock copper mine of Tongling Nonferrous Metals Company has merged the blind ore bodies Ⅱ, Ⅲ, Ⅳ and Ⅴ (hereinafter referred to as Ⅱ ~ Ⅴ) in the West Lion Rock Mine to form a large-scale blind mining Empty area, 1976, the goaf area volume of 230,000 m ~ 3. There are still 4.25 million t ore reserves in the lower part of the vacant area to be taken and the ore is recovered. The volume of the vacant area will be expanded to 2 million m 3. To use the mining method of a temporary ore cushion in the case of goafs that are not subjected to forced caving roof rock treatment. Safe and efficient mining of these ores, digging through the skylight is a must take safety measures. Skylights open in the middle of the roof rock, opened in 1976 by means of forced fall. In the past 11 years, ore bodies of Ⅱ ~ Ⅴ ore bodies have taken up 1.76 million tons of ore and the area of goaf has been expanded to 1.1 million m ~ 3. The skylights safe mining and induces the local caving of surrounding rock in the roof below 40m, Cushion conditions, played an important role, the following mining methods and empty skylights dug and application experience.