Research on resource utilization and underground circulation treatment of mine drainage

Mine drainage is a source which has relatively stable quality and been used conveniently. Recycling of mine drainage will greatly release the contradiction between the high rate of coal production and the relative shortage of water resource. At present, the cost and effectiveness of mine drainage disposal seriously restrict the reclamation utilization of mine drainage. Taking the Jining No.2 coal mine as an example, this paper deals with the mechanism and feasibility of processing mine drainage in goaf, and designs a circulatory system of processing mine drainage by goaf. Through the circulatory system the removal efficiency of turbidity exceeded 98%. Index in nitrate nitrogen, arsenic, total hardness, and ammonia nitrogen was reduced largely. The results indicate that, with underground circulation treatment system based on goaf, mine drainage can achieve the industrial water standard, processing cost can be reduced effectively and contamination of mine drainage on water environment can be solved fundamentally. It can prevent spontaneous combustion in goaf and has adjustment function in flood season.