摘要
针对金川二矿区大体积充填体稳定性问题,简要论述近年来地表岩移和井下地压显现特征,并开展大体积充填体的变形机制研究。制定针对大体积充填体变形的监测方案:采用自制的变形监测装置对1 150~1 200 m水平50 m高充填体的相对变形进行监测,采用水准仪对大体积充填体和围岩体的下沉变形进行量测。监测结果表明,大体积充填体综合下沉变形速率为16.00~51.44 mm/月,最大累计下沉量达515 mm,大体积充填体自身相对变形速率为1.953~28.585 mm/月,最大累计相对变形为285.85 mm。进一步分析大体积充填体综合变形、自身相对变形和围岩体变形的发展趋势。研究成果对于深刻认识二矿区大体积充填体的稳定性、围岩体的变形等提供了重要的依据。
The characteristics of surface subsidence and ground pressure in recent years in No.2 mine area, Jinchuan were briefly described and the mechanism of deformation was carefully analyzed. A monitoring scheme was implemented based on the results of deformation analysis. A device was made to monitor the relative deformation of bulky backfill of 50 m in height at the altitude level of 1 150 to and 1 200 m. Bubble level was used to monitor the vertical displacement of the bulky backfill and the surrounding rock. The monitoring results shows that the rate of total deformations of measurement points is 16.00–51.44 mm/month and that the maximum accumulated deformations is 515 mm. The rate of relative deformations at measurement points is 1.953–28.585 mm/month , and the maximum accumulated relative deformations is 285.85 mm. The development trends of the total deformation,the relative deformation and the deformation of surrounding rock are also studied.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2015年第A01期104-113,共10页
Chinese Journal of Rock Mechanics and Engineering
