基于矿井地下水库的煤矿采空区地下空间利用模式与关键技术

Research status and prospect of underground space utilization mode and key technology in goaf based on underground reservoir

利用煤矿采空区建设矿井地下水库对实现矿井采空区地下空间及矿井水资源化、能源化利用,促进矿区环境生态保护意义重大。综合国内外典型案例,论述了基于矿井地下水库的矿井地下空间及水资源的3种利用模式:矿井地下储滤水库、抽水蓄能电站及矿井地热开发利用。与国外传统地下水库以井巷为主要存储空间相比,目前国内构建的地下水库主要以矿井采空区垮落带为存储空间,这使得矿井地下水库的容量大幅度提升,且垮落带内的煤矸石对矿井水还具有过滤作用。在此基础上,凝练了中国煤矿地下水库2个关键科学问题:矿井地下水库库容能力和矿井地下水库稳定性控制。探讨了库容能力和坝体稳定性控制的影响因素和现阶段主要研究手段,提出了在产矿井和资源枯竭型矿井建设地下水库的后续研究方向。

It is significant to construct underground reservoir to utilize underground space and water resource and energy in goaf,and to promote environmental ecological protection of mining area.Based on typical worldwide cases,this paper discusses three utilization modes of underground space and water resources based on underground reservoir:underground storage and filtration reservoir,pumped storage power station,and development and utilization of mine geothermal energy.Compared with the previous UWR with the tunnel as the main space,the storage capacity is larger and the gangue in the caving zone can be purify the mine water.This makes the capacity of underground reservoir of mine increase greatly.On this basis,the paper summarizes two key scientific problems of underground coal reservoir in China:capacity of underground reservoir and stability control of underground reservoir in mine.Furthermore,the influencing factors of reservoir capacity and stability control of the dam body and the main research methods at the present stage are given,and the follow-up research direction of construction of underground reservoir in the production and resource exhausted mines is proposed.