Mounting fans in series in closed adit and using two fans as air extractor and one fan for pressing air,the difficult problem of ventilation in long single entry was well-solved,the blasting smoke in working face were removed effectively and the density of dust lowered.

This paper puts forward the reasonable optional method of timbering parameter for big section room construction,as well as the items should be noticed and the problems should be solved first in construction course.

Through analysis to weak coalbed and harmfulness to roadway,main haulage roadway and room supporting design and adaptability condition are discussed in weak coalbed.

According to service rife of room and feature of surrounding rock,pressure situation of room was analyzed,supporting parameter was counted on the basis of combined arch theroy.

Back-analysis of mechanics parameters of surrounding rock of cave;

Unified solution of elastic-plastic analysis for surrounding rock mass stress under cave deformation;

Application of combined support with bolting and wire mesh in large section tunnel;

Key Techniques of Geologic Logging Information System for Complex Tunnel;

A new method for the geologic logging of digital photos of tunnels and its principle are introduced.

Study on coupling support technique of second bolt-mesh and cable for large section soft-rock chamber in deep mine

The animal experiment in airtight cabin of hypoxia micro-circumstance and the design of its regulative system;