关键词: 采空区, 活化, 稳定性, 水库渗漏

Abstract:

Combined with the engineering geological conditions of a reservoir and a coal goaf occurrence conditions in Xianyang City, through field test, the distribution characteristics of fracture zone of the goaf edge was explored, and by analyzing the impact of mining on rock mass integrity and leakage, the stability of the goaf and its influence on reservoir permeability was evaluated. The results showed that the load of reservoir water would not cause "activation" of the goaf; the influence of the goaf on the leakage of reservoir is small. At the current stage, the increased ultimate leakage of the reservoir caused by the goaf is 1004.41 m3/d, accounting for 0.87% of the designed annual average runoff of the reservoir. The goaf will become stable gradually, and the leakage volume will reduce with time. In view of this, it is suggested that the monitoring of mined out area should be strengthened.

Key words: mined out area, activation, stability, reservoir leakage