The technical measures and structure,applied principles of blastproof of ventilation shaft at excavating face,specific operational method and prospective effect are described.
介绍了掘进工作面防炮崩风筒的主要技术措施及技术、理、项技术的具体操作方法及达到的预期效果。
The technical measures and structure,applied principles of blastproof of ventilation shaft at excavating face,specific operational method and prospective effect are described.
介绍了掘进工作面防炮崩风筒的主要技术措施及技术、理、项技术的具体操作方法及达到的预期效果。
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