天井吊罐作业是一项仅有几年历史的新的掘进工艺,它具有效率高,速度快,节约人力和原材料消耗等优点,另一方面也存在通风条件差,炮烟得不到及时的排除,粉尘浓度较高等问题,仍未能得到很好的解决。由于天井上掘高度的变化,而通风管不能向井筒内延伸,工作面愈高通风愈困难,炮烟在井筒内停留达1-2小时,特别是多次循环显得更为突出。 Patio jar operation is a new only a few years history of the tunneling process, which has the advantages of high efficiency, high speed, saving manpower and raw materials consumption, on the other hand there are poor ventilation conditions, the gun can not be timely Exclusion, the higher the dust concentration and other issues, still can not get a good solution. Due to changes in the height of the patio, ventilation pipes can not extend into the wellbore. The higher the working surface, the more difficult it is to ventilate. The guns stay in the wellbore for 1-2 hours, especially after multiple cycles.