云南省矿井抽水蓄能电站潜力评估与建设关键技术

Potential Evaluation and Construction Key Technologies of Pumped-storage Power Stations in Mines of Yunnan Province

针对云南省矿井地下空间利用率低、蓄电储能需求日益增长的问题,综合考虑岩石力学、矿山规划、环境、经济等多方面影响因素,对云南省利用废弃矿井建设抽水蓄能电站的开发潜力进行了定量评估;同时,以常规抽水蓄能电站为基础,结合云南省地质条件、矿产资源分布、矿山地下空间分布特点等,对矿井抽水蓄能电站建设时站址的选择、地下空间的稳定、地下空间防渗等关键技术的可行性进行了综合评价。研究结果表明:云南省自然资源极其丰富,开发条件优越,现阶段能够较好地满足云南省电力需求;云南省众多矿山的累积采空区已超过1.5×10^(9)m^(3),其中可利用采空区高达1.2×10^(8)m^(3),为建造井下抽水蓄能电站提供了良好的基础条件;云南省矿井抽水蓄能电站年总发电量可达3.29×10^(10)kW·h,根据改造建设抽水蓄能电站的实例计算可知,改造建设的电站每日抽水5 h,其年发电量将达到1.76×10^(8)kW·h。研究结果表明,利用废弃矿井改造建设抽水蓄能电站具有一定的可行性,能够产生较好的动静态效益。同时,将“智慧矿山”与废弃矿井建设抽水蓄能电站相结合,实现智能一体化抽水蓄能,在未来具有良好的发展前景。

In view of the problems of low utilization rate of underground mine space and increasing demand for electricity storage and energy storage in Yunnan Province,the feasibility and key technologies of the construction of pumped-storage power stations in underground mines are analyzed,in consideration of rock mechanics,mining planning,environment,economy and other various factors.The quantitative evaluation is made on the development potential of the abandoned mine pumped-storage power station in Yunnan Province.Based on the conventional pumped-storage power plant,combining with the geological conditions,the natural resources and underground excavation space situation,the feasibility of the key technologies such as site selection,stability of underground space and anti-seepage of underground space during the construction of mine pumped-storage power station is comprehensively evaluated.The preliminary results show that:Yunnan Province is rich in natural resources and has superior development conditions,which can better meet the electricity demand of Yunnan Province at the present stage.The accumulated excavation space of numerous mines in Yunnan Province exceeds 1.5×10^(9)m^(3),and the usable volume is about 1.2×10^(8)m^(3),which provides excellent basic conditions for the construction of underground pumped-storage power stations.The pumped-storage power stations in mines of Yunnan Province can generate 3.29×10^(10)kW·h of electricity per year.According to the calculation based on a real mine,the power generation will reach 1.76×10^(8)kW·h per year when the water is pumped for 5 hours a day,and it will bring huge economic benefits.According to the research results,it is feasible to reconstruct pumped-storage power station using abandoned mine,and it can produce better dynamic and static benefits.Combin-ing“smart mine”with pumped-storage power station constructed by using abandoned mine to realize intelligent integrated pumped-storage has a good development prospect in the future.