Subjects: Engineering and technical science >> Engineering Hydrology submitted time 2023-03-30
Abstract： In order to solve the problem of acid wastewater discharged from abandoned coal mines in the Yudong River basin, according to the cause of formation of acid wastewater(sulphide in coal measure stratum, oxidation environment, groundwater and channel) and different mining conditions of waste coal mine, classified measures and partial implementation are carried out, by summing up the treatment experience of many abandoned mines, puts forward a set of“Cause-source ecological water-shut-off wastewater treatment method” for coal mine wastewater, which is relatively suitable for the actual situation of the region, that is, tracing the distribution of the roadway in the abandoned coal mine, blocking the key section, intercepting the surface water, using curtain grouting to raise the water level in the goaf. The basic principle of this method is to change the path of direct outflow of surface water after entering goaf, to use the means of tunnel blocking and curtain grouting to isolate the oxygen in the goaf of the abandoned coal mine, and to raise the groundwater level, make the roof aquifer gradually restore to the original state, so that coal mine wastewater become into deep water retention, so that subsequent recharge water to flow out from a high position. The test results of rainy season show that the treatment effect is remarkable.
Peer Review Status:
Awaiting Review
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