According to mine pressure research on thin the coal seam ,the face action mechanism between the support and surrounding rock ,the relation between the surroanding rock moving and loaded support,and support result are analyzed with transmission rock theory.

To solve the key problem of the steepgrade angle and top coal mining, the essential rule has been synthetically evaluated including the mechanical character of rock and coal, the supporting force of the key position at the working face,coal and rock movement regular and stress evolvement character due to mining.

The tunnel rock stability was deduced through measuring shelf support force.

Meanwhile,making use of observation data of scene in working face of close distance coal seams,the characteristic of support load during fi.

Meanwhile,the characteristic of support load during first and periodic weight of the main roof was studied.

This paper analyzed underground pressure behavior rules and periodic weighting pace of 2S224 Mining Face of Taitou Col-liery on the basis of observation data of roof broken degree,coal wall spalling,roadway deformation and support load.

The distribution patterns of mechanical characteristics for surrounding rock in the gateways of fully mechanized top-coal caving(FMTC) face were put forward by analyzing deep displacement,surface displacement,stress distribution and supports loading.

This paper will summarize the progress of research in selection of load frame of osseous tissue engineering and their applications.