Technical transformation of capacity expansion in East mining area of Longshou Mine in Jinchuan, Gansu Province and well construction project of East lean ore mining project

Project Name: mixed well project in East mining area of Longshou Mine and auxiliary shaft, drift and pass project in East lean mine

Project location: Jinchang City, Gansu Province

Project Profile:

1. The mixed well project includes shaft and matoumen, finished product ore bin, ore pass loading system, crushing chamber and its large piece Road, connecting road, ore storage bin, belt road and its connecting road, powder ore recovery Road, etc.

The net diameter of the mixed shaft is 6.6m, the diameter of the normal section is 7.5m, and the total depth is 1100.7m. The supporting form is reinforced concrete, or shotcrete anchor net and reinforced concrete. The shaft neck and wall seat are 100 mm single-layer shotcrete anchor net and double-layer reinforced concrete, and the concrete body is thickened. The total excavation volume of the project is 50861m3, the support volume is 9065m3, the shotcrete volume is 2638m3, the reinforcement volume is 58728kg, the net hanging volume is 405937kg, and the anchor rod is 12609.

2. The net diameter of the auxiliary shaft of Jinchuan East lean mine mining project is 6.5m, and the shaft depth is 838.4m. Reinforced concrete is used for the upper shaft wall with a thickness of 50m, reinforced concrete is used for the lower shaft wall with a thickness of 1.800mm, reinforced concrete is used for the upper shaft wall with a thickness of 50m, and reinforced concrete is used for the lower shaft wall with a thickness of 1.800mm.

There are 13 horsehead doors connected to the shaft.

The total excavation volume of the auxiliary shaft is 49831m3, the support volume is 10459m3, and the reinforcement volume is 733.926t (including matoumen connecting road, ore loading and fine ore recovery chamber).

3. Excavation and masonry works of 1350ml and 1250ml drift, loading chamber, 1350-1250ml (diameter 4m) and 1250-1000ml (diameter 5m) main pass, etc. Total excavation volume

69000m3 and 11500m3..

Project status: completed