潞安矿区煤水共采技术研究

 为了水资源的可持续利用和煤矿安全开采，基于绿色开采理念和采动岩体渗流理论，提出区别于疏干开采和排供结合的煤与水共采的观点。以潞安矿区为基地，分析地下水系统特点，发现并利用了奥陶系顶部隔水层，成功实施矿井水资源化利用和煤与水共采。研究结果表明：煤与水共采既适度开发地下水、维持泉组流量处于动态平衡状态，又经济安全地开采了浅部大量受水威胁的煤炭资源。奥陶系顶部隔水层是不需大幅度降低底板奥灰水位就能实现煤水共采的前提和保障，不仅解放了3#煤，而且解放了占矿区总储量1/3的下组煤；煤与煤系地层水共采和矿井水的净化利用为保持矿区乃至整个盆地地下水资源的采补基本平衡做出了重要贡献。煤与水共采是以保水、保安及环境保护为前提的2种资源的合理开采。

RESEARCH ON SIMULTANEOUS EXPLOITATION OF COAL AND GROUNDWATER IN LU(AN COALFIELD

Based on the concept of green mining and dynamics of fluid in rock mass affected by mining，the viewpoint of simultaneous exploitation for coal and water to continuously utilize water resources as well as safely mining is put forward，which is different from the traditional mining methods，such as draining water before mining and combination of drainage and application for other purpose. At the same time，taking the Lu¢an coalfield as case study to analyze the characteristics of groundwater system，mining groundwater is successfully utilized and simultaneous exploitation of coal and groundwater by using the water-resisting capability of Ordovician top is implemented. The results indicate：(1) the simultaneous exploitation of coal and groundwater can not only properly exploit groundwater to maintain the dynamical balance state of spring group flow，but also make it possible to mining a great deal of coal resources in shallow part economically and safely，which is threaten by Ordovician water；(2) the discovery and utilization of aquifuges in Ordovician top are the precondition and guarantee to carry out simultaneous exploitation of coal and groundwater without reducing the water level of Ordovician groundwater under floor，which will release not only the coal seam No.3 but also the lower coal seams which account for one third of total reserve in the mine area；and (3) simultaneous exploitation and utility of coal and groundwater have played a major part in keeping the basic exploitation-recharge balance of groundwater in the mining area and even in the whole basin. Overall，the objective of the simultaneous exploitation of coal and groundwater is to exploit this two kinds of resources properly without destroying water and environment and decreasing safety.