下向进路分层无分段充填开采通风系统改进

Improvement on Ventilation System of Slicing and Backfill Mining without Sublevel in Downward Drift

针对某金矿现场采用的下向进路分层无分段充填采矿法通风系统所存在的问题,对原有通风系统进行了技术改造,研发了一种新型的"充填回风井封堵板加可伸缩刚性风筒"辅助通风装置,并在1111#采场进行了工业性试验。结果表明:通风系统改造后,每个作业循环除尘时间缩短了0.9 h,节约新鲜风32 99.4 m3;解决了下向进路分层无分段充填采矿过程中存在的工作面新、污风混杂,通风效果差等问题,提高了采场工作效率。该研究成果可为类似条件下的金属矿山通风系统改造提供借鉴。

According to the existing problems of ventilation system of slicing and back-fill mining without sub-level in downward drift in a certain gold mine,the original ventilation system is modified. A new type of＂back-fill return air shaft plugging plate with expansible rigid fan tube＂auxiliary ventilation device is researched and developed,and then is applied into1111#stope for the industrial tests. The results show that： after the ventilation system improved,the time of dust removal at each operation cycle is shortened to 0. 9 h,and 32 99. 4 m3 of fresh air can be saved. The problems in the process of back-fill mining without sub-level in downward drift layer are solved,such as the confounding of fresh and dirty air in the working face,and the poor ventilation effect,and the working efficiency of the stope is improved. The research results could provide theoretical guidance for improving the ventilation system of the metal mines under the similar condition.