Taking 14203 working face in Shaqu Mine as an example, this paper compares two outburst prevention schemes of fully mechanized workface, determines that deep pre-drainage is a rational tunneling scheme, and points out that this scheme has practical significance for implementing the quick tunneling.

Shield tunneling direction control technology;

This paper analyzes the reason of effects masonry of roasting furnace, and puts forward improving plan.

This paper analyzes the failures of air operated double position butterfly valve used in car type furnace, and puts forward improving plan.

This article analyzes the main reasons for vaporization inside HP ammonium carbamate pump,proposes improving plan in order to completely solve this bottlenecking problem.

Comparison and Analysis of Improvement Schemes for RDSS Positioning Technology;

The determination of analysis and improvement scheme of structure defects in pipe cold-drawing machine;

In view of the problem occurring in previous structure of fine forging die for semi-shaft gear and in the production,the paper gave a primary analysis on the fine forging proˉcess,then put forward a new improvement scheme for the construction of the die and the seˉmi-shaft gear.

According to the need of ventilation research and practical production, the paper made careful analyses about eight ventilation plans and six standards in Pine Mine with step analysis.

Applications and improved schemes of genetic algorithms in structural optimization with discrete variables;

The reliability improved method and control technique improved scheme of fuel system of 9E gas turbine are introduced.

And then proposes an improved scheme that is anti-business fraud and that can protect the cardholder\'s PAN information from disclosing.