Observation and numerical simulation study on development height of"two zones"on the roof of coal seam in Ke'erjian Coal Mine
Zhang Wu
Feng Jianli
Wu Qing
Qian Hongtao
Ding Huanhuan
Li Xin
Abstract：To explore the mechanism of stress changes and surrouding rock failure caused by coal seam mining,starting from the caving zone and water-conducting fracture zone of overlying rock strata in the goaf,taking the 3W5-301 working face of the No.5-3 coal seam in Ke'erjian Coal Mine as the research object,a dual end sealing and leak detection device was used for drilling,and the height of the"two zones"was observed by using the method of segmented water injection through underground drillings.The data of water leakage from drilling was analyzed,and comprehensive analysis and numerical simulation of the results were carried out.The development height of the"two zones"in the 3W5-301 working face was identified.And the exploration results have guiding significance for mining of other working faces in No.5-3 coal seam.
Keywords：hydrogeologygroundwater characteristicoverview of working facedrilling arrangementsegmented water injection
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：7( 86-91,96 )