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Mine Pressure Behavior Measured Research of "Two Hard"Surrounding Rock Thin Coal Seam Working Face
Pages: 4-6,33
Year: Issue:  9
Journal: Coal

Keyword:  "two hard"surrounding rockthin coal seamfield measurementmine pressure appear;
Abstract: Aimed at IX4311 "two hard"(hard roof and hard floor) thin coal seam surrounding rock geological conditions of fully mecha-nized working face,the pillar with advanced monitoring,coal stress monitoring technology,research and analysis of the working face of stope distribution characteristics of abutment pressure,and combined with field monitoring data,the face pressure to IX4311 thin coal seam face mining stress firstly analysed and studied.The results show that the IX4311 thin coal seam working face roof first pressure step distance of 26.8 m,periodic weighting interval averaged 17.8 m,dynamic load coefficient is generally smaller;abutment pressure peak position is located in the coal wall in front of the 1 ~8 m,to compressive strength is low the No.2 Shaft in Sihe Coal Mine,the similar condition working face safe and efficient mining provides reference and guidance.
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