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介绍了郑州矿区三软煤层应用π型钢梁炮采放顶煤技术的回采工艺、矿压显现规律及工作技术管理要求、取得的技术效果。
This paper introduces the mining technology, the rule of mine pressure and the technical management requirements of the application of the π type steel beam blasting caving mining technology in the three soft seams of Zhengzhou mining area and the technical effects achieved.