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Selection of the diameter of the local mine ventilation duct(4)
2. Application 2.1 Actual case The air volume Q of the excavation face of a mine is 3m3/s, the wind resistance of the mine ventilation duct is 0. 0045(N·s2)/m4, the ventilation power price e is 0. 8CNY/kwh; the price of the 800mm diameter mine ventilation duct is 650 CNY/pcs, the price of mine ve...Read more -
Selection of the diameter of the local mine ventilation duct(3)
(5) Where, E – the energy consumed by the mine ventilation duct during ventilation, W; h – the resistance of the mine ventilation duct, N/m2; Q – the air volume passing through the mine ventilation fan, m3/s. 1.2.3 Mine ventilation duct ventilation elect...Read more -
Selection of the diameter of the local mine ventilation duct(2)
1. Determination of the diameter of economic mine ventilation duct 1.1 Mine ventilation duct purchase cost As the diameter of the mine ventilation duct increases, the required materials also increase, so the purchase cost of the mining vent duct also increases. According to the statistical analys...Read more -
Selection of the diameter of the local mine ventilation duct(1)
0 Introduction In the process of infrastructure construction and mining of underground mines, it is necessary to excavate many wells and roadways to form a development system and to carry out mining, cutting, and recovery. When excavating shafts, in order to dilute and discharge the ore dust gene...Read more -
Industry pioneers in mine and tunnel ventilation
Chengdu Foresight Composite Co. Ltd. is a vertically integrated producer of flexible polymer fabric and goods for mine and tunnel ventilation. Foresight is a leader in the sector thanks to its dedication to quality and collaboration with clients to create the best solutions. These high-quality ve...Read more -
Ventilation Technology for High Altitude Long Distance Tunnel Construction（To be continued）
5. Construction ventilation effect On November 27, 2009, the ventilation effect test was carried out for each tunnel opening, and the ventilation effect of each working face was good. Taking the No. 10 inclined shaft as an example, the construction area used 4 working faces to construct at the sa...Read more -
Ventilation Technology for High Altitude Long Distance Tunnel Construction（To be continued）
4. Ventilation design and system layout 4.1 Main design parameters 4.1.1 Drilling depth. The average is 4.5m, and the effective blasting depth is 4.0m. 4.1.2 Amount of explosives. Take 1.8kg/m3 for full-section excavation, and the amount of explosive for one blasting is 767kg. The excavation of t...Read more -
Ventilation Technology for High Altitude Long Distance Tunnel Construction（To be continued）
3. Alternative construction ventilation schemes for different construction stages 3.1 Principles of Construction Ventilation Design 3.1.1 According to the ventilation and hygiene standards for tunnel construction in high-altitude areas, and considering the correction coefficient of the air weight...Read more -
Ventilation Technology for High Altitude Long Distance Tunnel Construction（To be continued）
2. Recommendations on ventilation and hygiene standards for high-altitude tunnel construction in China In the plateau area, the air is thin, and the exhaust emission of tunnel construction machinery increases, and there is very little test data in this regard. In this paper, combined with the Gua...Read more -
Ventilation Technology for High Altitude Long Distance Tunnel Construction
1. Guanjiao Tunnel Project Overview Guanjiao Tunnel is located in Tianjun County, Qinghai Province. It is a control project of the xining - Golmud extension line of Qinghai-Tibet Railway. The tunnel is 32.6km long (the inlet elevation is 3380m, and the export elevation is 3324m), and it is two pa...Read more -
Ventilation method of tunnel ventilation duct
Tunnel construction ventilation methods are divided into natural ventilation and mechanical ventilation according to the source of power. Mechanical ventilation uses the wind pressure generated by the ventilation fan for ventilation. The basic methods of tunnel construction mechanical ventilation...Read more -
Spring outreach training for marketing team in Foresight
"What I know influences my growth, and what I own limits my development." At the beginning of the new year, Chengdu Yuanjian Composite Materials Co., Ltd. organized a spring outreach training for the Marketing Department in Pixian County in early 2019. ...Read more
