(1. Changsha Institute of Mining Research Co.，Ltd.，Changsha，Hunan 410012，China；2. School of Architecture and Civil Engineering，Xiamen University，Xiamen，Fujian 361005，China；3. Mining Area No.2，Jinchuan Group Co.，Ltd.，
Jinchang，Gansu 737104，China)
Abstract：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.
金川有色金属公司，长沙矿山研究院. 金川二矿区一号矿体下向胶结充填大面积充填体作用机制试验研究[R]. 长沙：长沙矿山研究院，1990.(Jinchuan Non-ferrous Metals Company，Changsha Institute of Mining Research. Experiment study on action mechanism of bulky backfill by using downward strip cut and backfill stoping method of No.1 ore body in Jinchuan No.2 mine area[R]. Changsha：Changsha Institute of Mining Research，1990.(in Chinese))
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2015, Vol. 34 
