掘进巷道爆破后排烟时间计算

发布时间：2018-02-27 02:12

本文关键词： 掘进巷道炮烟排烟时间影响因素排烟时间系数　出处：《哈尔滨工业大学学报》2017年08期 　论文类型：期刊论文

【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.
[Abstract]:In order to study the smoke exhausting time after blasting, the formula of smoke migration law was deduced, and the grey correlation degree was calculated for the influencing factors of smoke exhaust time. The sensitivity order of the main factors is as follows: the distance from the roadway outlet to the heading head is 0.827) the distance from the wind pipe to the heading face is 0.738) the air supply capacity is 0.628) the initial volume fraction of CO in the gun smoke is 0.5477.The excavation in Huizhuang gold mine is carried out. The smoke monitoring test was carried out in the roadway, Under the condition of pressure-in ventilation, when the distance from the wind cylinder orifice to the head of the drivage is 10 ~ 15 ~ 20 ~ 2530m, the distance between the head and the head of the drivage is 10 ~ 15 ~ 20 ~ 2530 m respectively. The distance from roadway exit to heading head is 40 ~ 60 / 80 / 100 ~ 120m, respectively. The results show that the smoke exhaust time increases with the increase of the distance between roadway exit and heading face, and the relationship between them is linear. The smoke exhaust time increases with the increase of the distance from the nozzle to the head of the heading face, and the smoke exhaust coefficient c is linear with Lo, and the formula of smoke exhaust time under different working conditions is deduced. The relative error of the test and the similar roadway under 5 working conditions is 6.1and 3.8and 5.4and 8.8and 9.3respectively, which has good accuracy and reliability.
【作者单位】：北京科技大学土木与资源工程学院;山东黄金归来庄矿业有限公司;
【基金】：国家“十二五”科技支撑计划项目(2012BAK09B07)
【分类号】：TD235;TD724

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