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当今世界许多国家开采厚煤层以放顶煤开采工艺逐渐代替分层开采方法。我国在窑街、乌鲁木齐、北京等矿务局也试用放顶煤开采工艺开采厚煤层。事实证明这一新的开采工艺具有产量高,开采强度大,工作安全可靠,经济效益高等优点,但在回采率方面至今仍是有争议的。本文就适合于放顶煤开采之煤层及采矿地质条件与提高回采率作简要的分析。
In many countries of the world today, thick coal seams are being mined in order to gradually replace layered mining methods with top coal caving mining processes. China’s Yao Street, Urumqi, Beijing and other mining bureau also trial caving coal mining process mining thick seam. Facts have proved that this new mining process has the advantages of high output, large mining intensity, safe and reliable work, and high economic efficiency. However, the recovery rate is still controversial. This article is suitable for caving mining coal seam and mining geological conditions and improve the recovery rate for a brief analysis.