In this paper the reasons for the ground pressure appearance of 690 level in Tongkuangyu mine are analysed. It is hoped that gives reference for ground disaster protection.
本文对铜矿峪矿690中段地压显现的原因进行分析，希望给地压灾害预防提供参考。
In this paper the reasons for the ground pressure appearance of 690 level in Tongkuangyu mine are analysed. It is hoped that gives reference for ground disaster protection.
本文对铜矿峪矿690中段地压显现的原因进行分析，希望给地压灾害预防提供参考。
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