Relationship of jacking force and average friction with jacking path in pipe-jacking construction;

The theory analysis and solving of jacking force in the process of the jacking of oblique crossing framed bridges;

During the pipe pushing construction of the parallel steel water pipeline of Beidu-Yanger pipeline project in Ningbo, the pushing force in main pushing power station appeared unusual increasing and the construction had to be interrupted.

Study on improvement of knitting fabric bursting strength testing method;

Analysis of the uncertainty of bursting strength test of knitted fabric;

A comparison of breaking strength,tearing strength and bursting strength between corresponding twist fabric and twistless plain fabric has been investigated.

The possibility of the once formation process of steel tube upsetting was certified by caculation the force of upset.

Study on the blind number recognition of the calculation of roof pressure;

Effect of igneous rock on the roof pressure of mining field;

By a long-term effective observation and analysis of roof pressure at thick seam caving face such as observing by installing 11 YZJ-60-disc pressure instruments,preliminarily several very important regularity of the pressure curv at fully mechanized actual mining are got,which provides a useful guide for the actuat mining.

This article introduces the top pressure control of extra large-sized blast furnace based on AGS technology,emphasizes the process requirements to the control and operation,corresponding control strategy and control function.

To realize high precision control of top pressure,the dynamic mathematical model of top gas pressure recovery turbine(TRT) system was researched.

In order to stabilize the top pressure of the blast furnace during TRT operation, a feedback control loop which can be initialized is used in the adjustable static blade control, and a perfect control result is achieved in practical application.