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拉德博德煤矿在开采时,首先在 SW 7盘区的西部出现了相对面积很小的(约1000m~2)应力集中区(见图1)。从埋藏在直接顶之下约720m 深的罗伯特煤层开始,到
At the time of mining, the Radbod Coal Mine first produced a relatively small area of about 1000 m 2 in the western part of SW 7 (see Figure 1). Start with the Robert Seam buried about 720m deep under the direct roof