长距离局部通风技术的研究和应用

发布时间：2018-04-05 05:20

本文选题：长距离巷道　切入点：高效矿井　出处：《内蒙古科技大学》2014年硕士论文

【摘要】：随着现代化高产高效矿井的发展，掘进巷道的局部通风距离越来越长，长距离局部通风也越来越常见。长距离掘进巷道的安全供风不但关系到煤矿高效率的生产接替，而且关系到井下工作人员的生命健康。因此，长距离掘进巷道通风技术的优化和研究，对保证矿井的安全生产具有较大的理论与现实意义。首先，本文通过理论分析的方法研究了长距离掘进巷道局部通风技术的通风原理，研究各种通风方法的影响因素及适应条件，对现有的长距离通风方式的优缺点进行比较，并对适用条件进行探讨，详细分析了智能通风系统的工作原理，采用软件模拟的方法总结污风运移规律得出控制污风措施，从理论上推导了风机和风筒参数的计算公式和过程。然后针对干河煤矿2-1062巷具体情况进行现场应用，通过对巷道的通风方案和通风设备比选及制定具体的安全和优化措施，解决干河煤矿2-1062巷2300m掘进巷道的通风难题。最后通过分析总结出以下结论：局部通风距离的长度是影响通风困难程度的主要因素；不同的长距离通风方式适用条件主要与掘进巷道的地质条件和巷道开采条件等因素有关；掘进工作面需风量在不同时期有所变化，智能通风系统可以根据巷道各传感器的瓦斯浓度变化调整风机转速从而调节风量，可以有效的改善掘进巷道的安全性、可靠性、节能性；通过FLUENT软件模拟巷道内污风风流运动变化，得出瓦斯浓度在掘进面最不稳定，工作面和涡流区浓度最大，回风流风量增大时，掘进巷道出口处瓦斯浓度变化受大巷风压影响不明显，风量增加可以增加系统安全性，可以看出平行双巷回风巷道风量加倍，安全性更高。通过现场应用显示，选取的平行双巷掘进与智能通风系统相结合的局部通风技术可以有效的改善霍宝干河煤矿2-1062巷2300m掘进巷道的通风效果，缩短了通风距离，使有效风量率提高到82%；同时施工两条巷道，效率增大；实现一巷进风一巷回风的全负压通风，提高了安全效果。相比传统通风方式每年可以节省电力52万元，经济效果显著。长距离掘进巷道通风技术在霍宝干河煤矿巷道的分析应用，在相似高产高效矿井具有一定的推广价值。
[Abstract]:With the development of modern high yield and high efficiency mine, the local ventilation distance of tunneling roadway is longer and longer, and long distance local ventilation is more and more common.The safety of wind supply in long distance tunneling roadway is not only related to the high efficiency of coal mine production, but also to the life and health of underground workers.Therefore, the optimization and research of ventilation technology for long distance tunneling roadway has great theoretical and practical significance to ensure the safety of mine production.Firstly, this paper studies the ventilation principle of local ventilation technology of long distance tunneling roadway by theoretical analysis, studies the influence factors and adaptive conditions of various ventilation methods, and compares the advantages and disadvantages of existing long distance ventilation methods.The working principle of intelligent ventilation system is analyzed in detail, and the method of software simulation is used to summarize the law of pollution air movement and the measures to control pollution air are obtained. The calculation formula and process of the parameters of fan and tuyere are deduced theoretically.Then according to the concrete situation of roadway 2-1062 in Ganhe Coal Mine, the ventilation problem of 2300m roadway in 2-1062 roadway of Ganhe Coal Mine is solved by comparing the ventilation scheme of roadway and ventilation equipment and formulating concrete safety and optimization measures.Finally, the following conclusions are concluded: the length of local ventilation distance is the main factor affecting the difficulty of ventilation, the different conditions of long distance ventilation are mainly related to the geological conditions and mining conditions of roadway, and so on.The air demand of tunneling face varies in different periods. The intelligent ventilation system can adjust the fan speed according to the change of gas concentration of each sensor in the roadway, which can effectively improve the safety and reliability of the tunneling roadway.Using FLUENT software to simulate the change of air flow in roadway, it is concluded that the gas concentration is the most unstable in the driving surface, the concentration in the working face and eddy current area is the largest, and the return air flow volume increases.The change of gas concentration at the exit of tunneling roadway is not obviously affected by the wind pressure of the roadway, and the increase of the air volume can increase the safety of the system, and it can be seen that the wind volume of the return air tunnel in the parallel double roadway is doubled and the safety is higher.The field application shows that the local ventilation technology combined with parallel double roadway driving and intelligent ventilation system can effectively improve the ventilation effect of 2300m drivage roadway of 2-1062 roadway in Huobaogan River coal mine and shorten the ventilation distance.The effective air flow rate is increased to 82 and the efficiency of two roadways is increased at the same time. The safety effect is improved by realizing the full negative pressure ventilation of the return air in one entry and one lane.Compared with the traditional ventilation mode, it can save 520000 yuan of electric power every year, and the economic effect is remarkable.The analysis and application of long distance tunneling ventilation technology in the roadway of Huobaogan River coal mine has certain popularizing value in similar high yield and high efficiency mine.
【学位授予单位】：内蒙古科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TD724

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