This paper described roof coal distortion rules,and massed loose substance simulation test with caving agglomeration of different coal roof and different immediate roof influenced on coal caving ratio based on strata movement.

The spot observation research on the surrounding-rock deformation laws of roadway in fully-mechanized sub-level caving mining face;

Study on the deformation law of calcirudite rock mass with a single fracture;

Experimental research on deformation law of soil under blast-en largement loads;

Computer simulation on the movement and deformation rules of three-roll planetary rolling process of Copper tube;

The deformation rules of 45# steel ring piece with outer step is studied through the analysis of plastic theory,numerical calculation of ABAQUS plastic FEM and simulating rolling experiment of 1:4 lead sample.

Based on the deformation data,the deformation rule of wall ro.

Formation of the Superiority of Rice Tillering Positions and Its Utilization for High Yield;

This paper is aimed to investigate the formation rule of the high blank values so as to make clear the influential factors of such values in the course of determining the TN level in the water.