Study On Sidewall Mining Of Inclined Thick Coal Seam In Tianchi Energy South Open Pit Coal Mine

The energy industry is the foundation of China’s real economy.China’s resource endowment conditions of rich coal,less gas and poor oil have created the theme of coal,and the energy status will not change in the short term.The efficient,green and safe mining of coal has become the main theme of the development of coal industry.Meanwhile,One belt-One road”initiative will be promoted and the energy center of China will gradually shift to the West.Xinjiang will gradually become a new energy center and an important base.According to the hydrogeological characteristics of the mining process of the south slope of Xinjiang,this thesis makes a comprehensive study on the "mining process of the south slope of the giant slope" according to the working conditions of the south slope of Xinjiang.(1)According to the geological and hydrological conditions of the south slope of Xinjiang Tianchi energy south open pit mine,the field survey was carried out,the stratigraphic structure and distribution of the south slope were determined,the supplementary survey work was carried out,the indoor conventional mechanical experiments were carried out,and the physical and mechanical parameters of the rock and soil mass of the south slope were further determined.(2)The stability of south end slope,composite slope and slope under the influence of earthquake are calculated and analyzed by using the limit equilibrium method.At the same time,the three-dimensional slope model of south end slope is established by using FLAC3 D,which reveals the variation law of stress and strain and the distribution characteristics of plastic zone of the inverted slope of south end slope huge thick coal seam.(3)According to the provisions of slope stability coefficient in the code for design of open pit mines in coal industry,the end slope parameters and slope angle in the process of South Slope Mining(2020)are calculated and determined,and the south slope mining parameters from 2021 to 2025 are calculated respectively according to the stratum changes.(4)According to the principle of technical economics,combined with the mining,transportation and drainage characteristics of extremely thick inclined coal seam,three side mining schemes are put forward.According to the stability calculation results,scheme feasibility and economic comparison,the scheme(5-0-5-0)without transportation channel on the south side coal bench is determined as the final side mining scheme.In 2020,the recommended scheme can recover 1.84 million tons of end wall coal resources in the west of south end slope,create a profit of 63.7928 million yuan and achieve remarkable economic benefits.This dissertation includes 61 figures,9 tables,and 73 references.