Based on in-situ observation about stress in inclined coal pillar for fully-mechanized top-coal caving face of thinner coal seam and the elastoplastic limit equilibrium theoryt,aking the thickness and angle of coal seam into account,the results and relations are analyzed systematically and completely;and the formula and the distribution laws of stress peak value are obtained.

Practices and experiences on fully mechanized caving tech. in relatively thinner thick coal seam;

The practices and experiences on mining by the light supported fully mechanized caving method and the technical problems encountered in mining in the relatively thinner thick coal seam(i.

The paper study thin and thick seam with steep dip mining technique of 7417 fully mechanized top-coal caving face,in Zhangshuanglou coal mine,introduce to coal mining method and equipment anti-skid successful experience,provide reliable use for reference mining of resemble face.

This paper introduces the general situation of working face,sums up the support work management,the roof control and precautious measures adopted for single hydraulic prop in thinner thick coal seam with large dip angle,and in the light of the problems existing in the application of single hydraulic prop,put forward some improvement suggestyions.

Practice on high efficient mining technology in thin seam;