| 引用本文: | 曹杨,纪洪广,周启明.掘进巷道爆破后排烟时间计算[J].哈尔滨工业大学学报,2017,49(8):135.DOI:10.11918/j.issn.0367-6234.201605096 |
| CAO Yang,JI Hongguang,ZHOU Qiming.Calculation of fume-drainage time of tunnel after blasting[J].Journal of Harbin Institute of Technology,2017,49(8):135.DOI:10.11918/j.issn.0367-6234.201605096 |
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| 摘要: |
| 为研究掘进面爆破后排烟时间，推导掘进面炮烟运移规律公式，对排烟时间影响因素进行灰色关联度计算，得出主要影响因素的敏感性大小排序为：巷道出口到掘进面迎头的距离(0.827)＞风筒口到掘进面迎头的距离(0.738)＞风筒供风量(0.628)＞炮烟中CO初始体积分数(0.547).在归来庄金矿掘进巷道中进行炮烟监测试验，研究了压入式通风条件下，风筒口到掘进面迎头的距离LO分别为10、15、20、25、30 m时，巷道出口到掘进面迎头的距离LP分别为40、60、80、100、120 m的排烟时间.研究结果表明：排烟时间随巷道出口到掘进面迎头的距离增加而变长，两者拟合成线性关系；排烟时间随风筒口到掘进面迎头的距离增加而变长，成非线性增加；排烟系数c与LO拟合成线性关系，并推导出不同工况下排烟时间的计算式；在试验及相似巷道的5个工况下进行验证，相对误差为6.1%，3.8%，5.4%、8.8%，9.3%，具有较好的准确性和可靠性
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| 关键词: 掘进巷道 炮烟 排烟时间 影响因素 排烟时间系数 |
| DOI：10.11918/j.issn.0367-6234.201605096 |
| 分类号:X9 |
| 文献标识码:A |
| 基金项目:国家“十二五”科技支撑计划项目(2012BAK09B07) |
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| Calculation of fume-drainage time of tunnel after blasting |
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CAO Yang1,JI Hongguang1,ZHOU Qiming2
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(1.School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2.Guilaizhuang Mining Co., Ltd., Shandong Gold Group, Linyi 273307, Shandong, China)
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| Abstract: |
| To research fume-drainage time of tunnel after blasting, the formula of removal law of blasting fume in tunnel is deduced. Through calculating the grey correlation degree of influential factors of fume-drainage time, the ranking results of sensitive degree of main influential factors are: distance of entrance to tunnel face (0.827) > distance of duct to tunnel face(0.738) > air flow in duct(0.628) > initial volumetric concentration of CO in blasting fume(0.547). Blasting fume monitoring tests were conducted in tunnel to study the fume-drainage time when the distance of duct to tunnel face LO are respectively 10, 15, 20, 25, 30 m and the distance of entrance to tunnel face LP are respectively 40, 60, 80, 100, 120 m under the condition of forced ventilation. Research findings reveal that: fume-drainage time increases with the longer distance of entrance to tunnel face. The fitting result of the both is linear relation; fume-drainage time shows nonlinear rise with the addition of the distance of duct to tunnel face. The fitting result of fume-drainage coefficient c and LO is linear relation, and calculation formulas of fume-drainage time in different working condition are concluded. Verification of equation is carried out in 5 tested similar tunnels. And relative errors are respectively 6.1%, 3.8%, 5.4%, 8.8%, 9.3%, which have remarkable accuracy and reliability
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| Key words: tunnel blasting fume fume-drainage time influential factor fume-drainage time coefficient |
