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开滦钱家营矿主、副井及东风井均采用冻结法施工,主井和东风井凿井快速施工均获得了较好的成绩。在副井冻结段施工期间,又组织了以装岩机直接破土装矸为中心的快速凿井施工,于1970.12～1980.1期间创月成井120.05米的成绩,掘进工效达3.67米~3/工,砌壁工效1.55米~3/工,直接成本比预算降低15.96％。现将该井施工情况介绍如下。一、工程概况1.工程及地质概况副井净直径8.0米,深650.4米。冲积层厚230.44米,其中砂类层84.82米,占
Kailuan Qianjiaying mine owners, vice wells and Dongfeng wells are frozen construction, the main shaft and Dongfeng shaft drilling quick construction have achieved good results. During the construction of the auxiliary shaft freezing section, a rapid sinking construction centering on the rock-breaking machine is also organized. During the period of December 1980 to January 1980, the monthly productivity of 120.05 meters was achieved and the tunneling efficiency reached 3.67 m 3 / work, Masonry wall work efficiency 1.55 m ~ 3 / workers, direct costs lower than the budget of 15.96%. Now the well construction situation is as follows. First, the general situation of the project 1. Engineering and geological overview Auxiliary net diameter of 8.0 meters, 650.4 meters deep. Alluvial layer thickness of 230.44 meters, of which sand layer 84.82 meters, accounting for