Optimization study on treatment technology of accumulated water at bottom of inclined basin in Zhanihe Open-pit Coal Mine
Liang Chengjiang
Li Ying
Liu Yuxi
Wan Fei
Wang Jiming
Wang Jiao
Han Dongjian
Hu Jiannan
Abstract：After the construction of water interception curtain at the Zhanihe Open-pit Coal Mine,the coal system water has become the main source of water inrush in the pit,and the current combined drainage project inside and outside the pit cannot satisfy the actual pro-duction needs.Based on the analysis of hydrogeology and water inflow conditions at the bottom of mine,combined with the actual drain-age engineering inside and outside the mine pit and curtain,focusing on the coal seam outcrop in the northeast area outside the curtain receiving recharge from the Quaternary aquifer.And along the advantageous runoff channel of the inclined basin,it flowed into the bot-tom of pit,ultimately leading to the problem of large water inflow in the coal measures.Three schemes were proposed,including optimi-zing the interception curtain,coal seam axis drainage,and"interception-drainage"combined treatment.And the governance effects of different schemes were predicted through numerical simulation methods.The results showed that the"interception-drainage"combined treatment scheme had completely drained the aquifer when pumping volume of a single well was Q=40 m3/h,and the water inflow of the mine was reduced to 353.48 m3/h.The overall water reduction rate reached about 80%,and the drainage effect was the most ideal.The research results provide theoretical and technical basis for the optimization of the bottom water treatment scheme of the mine in the future.
Keywords：open-pit coal minewater intercepting curtaininclined basinpit bottom water accumulation controlscheme optimization
Publication Date：2025-08-25
Online Publishing Date：2025-09-12(First online date of this platform, not the publication date of the document)
Pages：9( 97-105 )