Support of Coupled High Stress Field Mining Roadway in 9#and 10#Coal Seams of Jinda Coal Industry Co.,Ltd.
The 9#and 10#coal seams of Jinda Coal Industry Co.,Ltd.belong to close distance coal seams,and the overlying 9#coal seam is basically empty.The mining activities of the 9#coal seam have caused serious damage to the integrity of the 10#coal seam roof.Due to the concentrated stress formed by the protective coal pillars formed by the mining of the 9#coal seam within a certain range of its floor,the roof of the 10#coal seam working face is prone to collapse and difficult to support.Therefore,for the mining of close distance coal seams,the roadway support method and its parameters coupled with high stress fields were explored to improve the safety of mine production.
close distance coal seamsconcentrated stresssupport methodhigh stress fieldsafety production
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