中央导峒施工法在英德硫铁矿开始试用于-50米中段的马头门掘进。我矿传统的马头门掘进方法是随着井筒掘进依次掘进马头门的拱形部分与其下部。这种施工方法的主要缺陷是顶板暴露过早,受多次震动,容易产生冒落。樟坑矿区+10米中段马头门就因此而中止掘进,后虽采取锚喷支护等加以处理,但已延误工期,造成了人力物力的浪费。采用中央导峒法在-50米中段马头门施工成 Central guide construction method In Yingde pyrite trial began in the mid-50-meter Ma Tau door excavation. My mining method of traditional Ma Tau door excavation is followed by the wellhead excavation of the arch of Ma Tau door and its lower part. The main drawback of this construction method is the roof exposed too early, subject to multiple vibrations, prone to fall. Zhangkeng mining area +10 meters in the middle section of Ma Tau Mun and therefore suspended excavation, although after taking anchor spray support to be dealt with, but has delayed the construction period, resulting in a waste of manpower and material resources. Central guide method in the middle of the -50 meters Ma Tau door into