三山岛金矿采场充填脱水工艺改进措施

Improvement Measures of Stope Filling Dewatering Process in Sanshandao Gold Mine

采场充填脱水效果对充填体初凝时间及其短期和长期强度产生较大影响,三山岛金矿采用溢流管溢流脱水和充填挡墙的土工布渗透脱水,脱水效率不能满足现场工作要求。为此,在充填脱水理论研究的基础上,分析了影响充填脱水速度的主要因素,提出了多项充填脱水改进措施。增设竖直或倾斜的脱水管,更有效地排出充填采场中的重力水,同时避免充填料浆中细粒级颗粒堵塞脱水管。改进充填挡墙设计和滤水布的选取,避免细粒级颗粒短时间内聚集在滤水布附近,影响渗透脱水效果。设计充填管道滤水器,在充填料浆进入采空区前,过滤充填料浆中的部分自由水,提高了充填采场中料浆的浓度,减小了采场充填脱水工作量。改变矿山简单脱水方式,进一步提高采场充填脱水效率,避免影响下一步开采工作的顺利开展。

The dewatering of stope filling has a greater impact on the initial setting time of the filling body and its shortterm and long-term strength. The overflow dewatering was used in Sanshandao Gold Mine by overflow tube,and penetration dewatering was used by filling retaining geotextile,but the dewatering efficiency can not meet the requirements of field work. The main influence factors of the filling dewatering rate was analyzed on the basis of theoretical research on the filling dewatering,and many improvement measures of filling dewatering are put forward. Additional vertical or inclined dewatering tubes can be used to discharge the filling gravity water more efficiently,meanwhile avoid dewatering tube clogged by the fine-sized particles in filling slurry. The improved design of filling retaining wall and selection of treatment cloth can avoid the fine-sized particles gathered near the water treatment cloth in short time which can affect penetration dewatering. The water filter of filling tube was designed to filter part of free water in filling slurry before filling the slurry into the stope area,improve concentration of filling slurry,and reduce workload of stope filling dewatering. Changing simple dewatering way to further improve the efficiency of the stope filling dewatering,can avoid from affecting the development of the next mining work.