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Gold Science and Technology ›› 2018, Vol. 26 ›› Issue (5): 629-634.doi: 10.11872/j.issn.1005-2518.2018.05.629

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Measurement and Analysis of Resistance in Ventilation System of Jiaojiazhai Coal Mine

Xudong ZHU1(),Zhongliang LU1,2,3()   

  1. 1 School of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,Henan, China
    2 Key Laboratory of Gas Geology and Gas Control,Jiaozuo 454000,Henan, China
    3 The Collaborative Innovation Center of Coal Safety Production of Henan Province,Jiaozuo 454000,Henan, China
  • Received:2017-11-06 Revised:2018-03-29 Online:2018-10-20 Published:2018-10-31

Abstract:

In order to understand the distribution of ventilation resistance in mine ventilation system,provide better ventilation and resistance reduction,and to provide reliable basic information for ventilation design,network calculation and optimization,it is necessary to measure the resistance of mine ventilation system.The resistance of ventilation system was measured by base point method,and the parameters were determined for different measuring points.The measurement results were further calculated and analyzed from four aspects: evaluation of measurement accuracy,the distribution of ventilation resistance,the accumulation holes of mine and wind resistance.The results show that the layout of ventilation system and resistance distribution of Jiaojiazhai coal mine is reasonable,and the degree of ease of ventilation is easy.The wind resistance of the common air inlet wind roads in the three mining areas is large,and the facilities for regulating the air volume down hole in mines are too much,and the amount of air leakage from the damper is too high.It is recommended to replace the No.1 and No.2 fans and to strengthen the maintenance and management of the mine’s total return airway.

Key words: ventilation system, ventilation resistance, base point method, resistance distribution, mine, air re-turn laneway, equivalent orifice, Jiaojiazhai coal mine

CLC Number: 

  • TD724

Table 1

Measurement equipment selection"

名称 型号 数量
气压计 CPD2/20型 3 台
通风干湿球温度计 DHM-2 型 2 台
风表 高速、中速、微速 6块(各2块)
秒表 - 2块
皮尺 - 1个
测距仪 - 1个

Fig.1

Network map of mine ventilation system in Jiaojiazhai coal mine "

Table 2

Measurement accuracy of main measurement line(%)"

主测线路 测量精度
213采区(主测线路1) 3.97
221采区(主测线路2) 4.68
521采区(主测线路3) 4.86

Table 3

Resistance distribution of ventilation system in 213 mining area "

区段 点号划分 阻力/Pa 占总阻力百分比/%
合计 2 964.89 100.00
进风段 1-2-3-4-6 1 281.41 43.22
用风段 7-8-9-10 636.25 21.46
回风段 11-12-13 1 047.23 35.32

Table 4

Resistance distribution of ventilation system in 221 mining area "

区段 点号划分 阻力/Pa 占总阻力百分比/%
合计 3 091.21 100.00
进风段 14-15-…-25-26 1 043.84 33.77
用风段 27-28-29-30-31 205.02 6.63
回风段 32-33-…-37-38 1 842.35 59.60

Table 5

Resistance distribution of ventilation system in 521 mining area "

区段 点号划分 阻力/Pa 占总阻力百分比/%
合计 5 366.90 100.00
进风段 1-2-4-5-39-40-41-42 2 395.78 44.64
用风段 43-44-45-46-47 646.44 12.04
回风段 48-49-…-54-55 2 324.64 43.31

Table 6

Isometric hole of the mining area ventilation system(m 2 ) "

采区名称 等积孔
213采区 2.05
221采区 2.20
521采区 1.72
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