论文部分内容阅读
为了分析煤层开采对第四系松散含水层的影响,选择潞安矿区漳村矿为试验现场,通过浅部至深部煤层开采顶板导水裂隙发育高度的理论分析、数值模拟和实际观测资料对比,研究采高6 m,采动导水裂隙发育规律及对松散含水层的影响。结果表明:煤层埋深小于110 m区段,导水裂隙可突破第四系底部黏土隔水层而发育至第四系松散含水层,并对该含水层造成破坏;煤层埋深介于110-190 m区段,导水裂隙仅发育至基岩风氧化带,风化裂隙水可进入采场,对第四系底部松散含水层水影响较小;煤层埋深大于190 m区段,采动导水裂隙发育限制在完整基岩内,仅将顶板砂岩裂隙水引入采场。据此分析,漳村矿对采高6 m、埋深大于190 m的中深部煤层的开采对第四系松散含水层几乎无影响。
In order to analyze the influence of coal seam mining on Quaternary unconsolidated aquifer, the Zhangcun mine in Lu’an mining area was chosen as the test site. Through the theoretical analysis of the development height of the aqueduct and fractures of roof in shallow to deep coal seam, the numerical simulation and actual observation data comparison, The study on the law of the 6 m mining height and mining aqueduct and its influence on the loose aquifer is studied. The results show that the depth of coal seams is less than 110 m and the water-conducting fractures can break through the bottom of the Quaternary aquifer clay to the Quaternary loose aquifer and cause damage to the aquifer. The buried depth of coal seams is between 110- In the 190 m section, the water-conducting fissures developed only to the bedrock aeolian oxidation zone, and the weathered fissure water entered the stope and had little effect on the loose aquifer water at the bottom of the Quaternary system. The buried depth of the coal seams was larger than 190 m, The development of water fissures is limited within the intact bedrock and only the roof sand fissure water is introduced into the stope. Based on this analysis, the exploitation of middle-deep coal seams with a height of 6 m and a depth of more than 190 m in Zhangcun Mine has little effect on Quaternary loose aquifer.