Genesis analysis and study on tectonic control on water of Huainan North China-type coal field

In order to analyze deeply the genesis and tectonic control on water of the macrostructures of the fourth stage of the Huainan North China-type coalfield, the forms of folds and faults of the Huainan coalfield were used to verify and compare the North China craton geohistory, stratigraphy, and regional tectonics. Quantitative evaluation of the impact of mining area 8 on production mines was conducted. The results show that the Huainan coalfield was formed by the superposition of the Indosinian, Yanshan and Himalayan movements. The Indosinian movement formed the Huainan coalfield at near-east-west tectonic line(body) in the first stage, and the Huainan coalfield was formed at near-north-south tectonic line(body) in the second stage. After the tributary movement, the main tectonic pattern of the Huainan coalfield had basically taken shape. The third stage of the Yanshan movement and the fourth stage of the Himalayan movement had no significant effect on the large tectonic pattern of the Huainan coalfield. According to the movement time and the cutting relationship of the formed structures, the second stage structures cut the first stage structure. The near- north-south faults(cracks) cut the near-east-west faults(cracks), and the third stage magmatic rocks all crossed the first and the second stage fault zones(groups), there was no cutting relationship, and no faults(fractures) developed into the Cenozoic strata. The first stage to fourth stage structures had a significant difference in the degree of impact on the water hazards in each mine. Among them, the Gubei coalmine is the most effected. Huainan coalfield was a participant and witness of global tectonic events after coal accumulation in the Carboniferous-Permian, the staged tectonic feature of the macrostructures in Huainan coalfield provides direct evidence for study on the North China craton and the surrounding areas.