Study on roadway reasonable layout in steeply inclined contiguous coal seams

In order to study roadway reasonable layout of steeply inclined contiguous seams,taking No. 31165 working face of No.11 coal seam and No. 31265 workin g face of No.12 coal seam in Zhaojaba Coal Mine as engineering background,the paper studyed on roadway reasonable layout at working face by using theoretical analys is,numerical simulation software FLAC3 Dand site measurement. The research results showed that coal pillar width of No.11 coal seam was 10 m by theoretical calculatio n,the maximum support pressure of lower end was 20.38 MPa,the distance was 10. 1 m from lower end( the width of haulage gateway was 3 m),the maximum support pres sure of upper end was 18. 70 MPa and the distance was 11. 7 m from upper end( the width of return airway was 3 m) by theoretical calculation. The maximum support pres sure range was basically consistent with theoretical calculation width of coal pillar. Vertical stress and shear stress of horizontal arrangement haulage gateway was simlar t 0 internal misaligned arrangement roadway's,roadway maintenance was easier,return airway was in stress increased area and shear stress was larger,but the increased le vel was smaller. The maximum roof and floor deformation was 189 mm and roadway sides was 201 mm of haulage gateway,the maximum roof and floor deformation was 7 01 mm and roadway sides was 651 mm of return airway in No. 12 coal seam by site measurement. So the paper determined to use horizontal layout as the best option in N o.12 coal seam.