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郑集团告成煤矿是一座没计产能为90万 t/a 的中型矿井,主采的二_1煤层平均厚度为4.6m,具有顶软、底软、煤层软的“三软”特点,井田范围内
Cheng Group Chengcheng Coal Mine is a medium-sized mine with no production capacity of 900,000 t / a. The average thickness of the main two-1 coal seam is 4.6m. It has the characteristics of soft top, soft bottom and soft coal seam. Ida range