头门
头门-
济西矿马头门锚杆锚索锚注联合支护加固施工技术
Construction Technique of Anchor , chain , Anchor Injection Joint Support Consolidation on Horse-head Shape Arch at JiXi Coal Mine
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另外，头门港区地理位置优越，随着码头的建设和集疏运网络体系的完善，在头门港区建立煤炭交易市场将进一步突显优势。
Moreover , with the perfect geographical location , construction of the port and perfecting of the transportation , the advantage of the building increasingly shows up .
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原马头门断面不能满足矿井安全需要，需对原马头门进行断面刷大，采用刷帮挑顶技术。
The original ingate was enlarged by side cutting and roof cutting under the condition of filling behind wall by grouting , and then be supported and reinforced by the secondary support technology .