School of Geology and Environment,Xi'an University of Science and Technology

为了在开采陕北侏罗纪煤田煤炭资源的同时对具有重要生态意义的第四系萨拉乌苏组潜水含水层实施有效保护,基于煤田特殊的煤层-地下水空间组合关系,采用试验对比方法,研究了煤炭高强度开采对生态潜水流场的扰动规律,提出了旨在保护地下水资源和预防矿井水害的生态潜水流场优化调控策略。研究结果表明:采煤对生态潜水流场的扰动强度取决于导水断裂带对关键隔水层的破坏程度;导水断裂带发育高度主要受煤层开采强度控制;通过选取限高开采、分层开采、充填开采、限面积开采、条带开采等采煤工艺控制导水断裂带发育高度,使关键隔水层不受破坏,是实现保水采煤目标的有效途径;在条件适宜的井田实施上行开采有利于保护地下水资源和矿井安全。

in order to mine the coal resources of northern Shcanxi Jurassic Coafred and while to actively protect the phreatic aquifr in the Quatemnary SalawusuFormation with important ecological signfcances,based on the Coalield special seam-underground water space combined relationship.,an experimen comparson method was appied to study the igh intensity cal mining to the interference law of the ecologic phreatic water fow rfed and provided the optimized adjustment and contol stralegy of the ecologic phreatic water fow rield in order to protect the underground water resources and to prevent and conrol the mine water disaster The studly resuts showed that the cal mining inerference intensity to the ecologic phreatic water fiow fed would depend on the water fovwing crack zone to thefalre degree of te key water isolated layer.The develogment height of the water fowing crack zone was mainly controld by th mining intensity of the seam .The heghtlinit minin scing mining .bac .1l ing .rea linit mining,trpe mining and other cal mining technique were appied to control the develoment height ofthe waterfowing crack zoneand to proect the key water isclated layer without any falure and could be an effictive acesstorealize the target of the water keeping coal mining. n the coalfeld with above suitable condtions,the above mining technology conducted would be favorable to the protect the underground water resources and the mine safety

国家自然科学基金资助项目(41272388)；国际科技合作与交流专项资助项目(2012DFG71060)；