Three-incompetent bed cutting hole large section construction and supporting method

Three-incompetent bed cutting hole large section construction and supporting method

The invention relates to a three-incompetent bed cutting hole large section construction and supporting method. The method sequentially comprises a step of cutting hole construction and supporting and a step of cutting hole large section secondary brush expansion construction and supporting. The cut...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: NI BINGYI, JIANG ZUOHUA, DONG HUAXU, DING GUOLI, REN YAOXI
Format: Patent
Sprache:eng
Schlagworte:
EARTH DRILLING
FIXED CONSTRUCTIONS
GALLERIES
LARGE UNDERGROUND CHAMBERS
MINING
SHAFTS
TUNNELS
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Beschreibung
Zusammenfassung:The invention relates to a three-incompetent bed cutting hole large section construction and supporting method. The method sequentially comprises a step of cutting hole construction and supporting and a step of cutting hole large section secondary brush expansion construction and supporting. The cutting hole construction step comprises a step of large section primary construction and a step of cutting hole normal section construction. The three-incompetent bed cutting hole large section construction and supporting method has the advantages of shortening a working face installing construction period, reducing the project amount of cutting hole blasting brush expansion during the working face installing period, lowering workers' labor intensity and reducing investment of a supporting material.