on the basis of the tire mechanical models founded, makes an intensive theoretic study on vehicles tires vertical load variation in cornering with braking and step forward set up a simulating model.

Calculating equation of internal forces in circular curved beam acted by symmetric vertical loads;

Calculation methods of vertical load for directly buried heating pipelines;

In order to study the character and the action mechanism of the high pressure jet grouting pile composite foundation induced by vertical load, the mechanics character of the high pressure jet grouting pile is explained using experiments.

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.

According to the main technical parameters and its status of the existing freight train styled in C62A running on corporation-owned railway,it s feasible to increase 5t on the basis of marked load 60t after analyzing vertical dynamic load an.