ZHAI X X, LIU Q Y, ZHAO X F,et al.Coal bump risk assessment and mine earthquake occurrence characteristics analysis of fully mechanized caving face under hugely-thick conglomerate stratum[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(4):1-10.

doi:10.16186/j.cnki.1673-9787.2021110076

Received:2021/11/18

Revised:2022/01/30

Published:2023/07/25

Coal bump risk assessment and mine earthquake occurrence characteristics analysis of fully mechanized caving face under hugely-thick conglomerate stratum

ZHAI Xinxian1, LIU Qinyu1, ZHAO Xiaofan1, QIAN Hongliang2

1.School of Energy Science and Engineering，Henan Polytechnic University，Jiaozuo  454000，Henan，China;2.Gengcun Coal Mine，Henan Dayou Energy Co.，Ltd.，Sanmenxia  472431，Henan，China

Abstract:In order to effectively monitor and prevent coal bump accidents，taking the coal face 13230 under hugely-thick conglomerate stratum in Gengcun coal mine，Yima mining area，China，as an engineering background，the coal bump risk of the coal face was evaluated by using the comprehensive index method.At the same time，the characteristics of underground mine earthquakes were studied in line with the microseismic event monitoring results during the coal face mining.The results showed that：（1）Coal bump risk index of the coal face 13230 was 0.65，therefore，coal bump type belonged to medium burst grade.（2）During coal face mining period，mine earthquakes mainly occured in the coal/rock mass in front of the coal face.When the coal face was in the square-areas，the frequency，maximum energy，and total energy of mine earthquakes were significantly higher than those in the non-square-areas.The seismic sources of the mine earthquakes in the square-areas were mainly located in coal seam and its roof and floor strata in the middle of the coal face front，and located in coal seam and its roof strata in the upper side of the headgate.（3）Large energy mine earthquake events usually occured in roof periodic weighting periods in the coal face.The research conclusions provide reference for monitoring and prevention of coal bumps in fully mechanized caving mining in Gengcun Coal Mine.

Key words:hugely-thick conglomerate stratum;fully mechanized caving face;coal bump;mine earthquake;comprehensive index method;support working resistance

巨厚砾岩层下综放工作面冲击地压危险性评价和矿震发生特征分析_翟新献.pdf