宁夏红二煤矿风井冻结壁融化规律及成因

Melting Law and Causes of Wind Shaft Freezing Wall in Ningxia Honger Coal Mine

为研究宁夏红二煤矿风井井筒冻结壁融化规律,在井筒停冻后利用测温系统对冻土温度数据进行采集、汇总、分析,得出实际变化规律,并运用传热学原理对其成因进行分析,得出如下结论:因热源不同,冻结壁融化横向上在外、中、内侧表现出不同规律;在正常条件下,冻结壁的融化速度在纵向上随深度增加和地温的升高而加快;同一冻结壁不同岩性的冻土融化轨迹是相似的;相同地层条件下,冻结壁的融化速度基岩快于松散层,粗颗粒快于细颗粒。

For the study of Ningxia Honger coal mine shaft frozen wall melting law of permafrost temperature data collection,summary,analysis by using the temperature measurement system in shaft stop after freezing, the actual changes in the law, and by using the principle of heat transfer analysis of its causes, draw the following conclusions： due to different sources of heat, frozen wall melting laterally outside,in the inside,showing different rules： under normal conditions,increase the melting of the frozen wall in the vertical velocity increases with depth and temperature and speed; the same freezing wall of different rock melting permafrost trajectory is similar; the same formation conditions, the melting of the frozen wall is faster than the speed of bedrock loose layer,coarse particles quickly in fine particles.