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Journal of Desert Research ›› 2022, Vol. 42 ›› Issue (5): 146-157.DOI: 10.7522/j.issn.1000-694X.2022.00027

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Conversion of precipitationsurface watergroundwater and mine water affected by coal mining in the Hailiutu River BasinInner MongoliaChina

Qian Li(), Long Ma(), Tingxi Liu, Shuo Wang   

  1. College of Water Conservancy and Civil Engineering,Inner Mongolia Agricultural University,Hohhot 010018,China
  • Received:2021-10-15 Revised:2022-03-02 Online:2022-09-20 Published:2022-09-22
  • Contact: Long Ma

Abstract:

Coal mining changes the hydrogeological conditions of the basin. It is of great significance to study the transformation relationship between precipitation, surface water, groundwater and mine water under the influence of coal mining. Taking the Hailiutu basin as the study area. The transformation relationship of precipitation surface water groundwater mine water under the influence of coal mining is analyzed by mathematical statistics, Piper trigram and hydrogen and oxygen isotope diagram. The results show that the content of SO42-Na+Mg2+ in surface water increases greatly under the influence of coal mining; The transformation relationship between precipitation, surface water and groundwater in natural watershed is mainly the recharge of groundwater by surface water infiltration, with an average contribution rate of 56.7%; The conversion relationship between different water in Hailiutu and Nalin basin is mainly the recharge of surface water to groundwater in the mining area and its downstream. The average contribution rate increased to 69.3% and 59.4% compared with the upstream natural watershed. The main source of mine water is groundwater of the overlying Sarausu Formation with a recharge ratio of 72.4%. Coal mining speeds up the confluence of groundwater from overlying aquifer to goaf.

Key words: mine water, groundwater, surface water, conversion relationship

CLC Number: