Research of support technology on mining softrock roadway;

Support design and construction technology of roadway conjunction with large span in softrock;

Design and implementation of Web GIS for coal mining softrock;

The feasibility analysis of wa-dong coalmine under the conditions of soft rock and villages;

Failure analysis and countermeasure of bolt shotcrete support for soft rock roadway;

Practice of second support theory applied to deep mine soft rock section chamber support;

With the application of numerical simulation software FLAC2D,this paper has simulated the deformation and failure regularity of surrounding rocks with bolt support for soft rocks roadway,and also analyzed the surrounding stress,displacement and plastic zone accordingly.

By studying method of numerical Mechanics,the volumetric dilatation of soft rocks around the tunnels is analyzed.

Based on the research of classification and features of some typical soft rocks in a certain major project in Guangdong province,the authors design a series of tests for the interaction between soft rocks and water.

The confirmation of disposal-parameters of bolting and serosity-parameter of injection-grouting of bolting-grouting reinforcement in soft-rock;

The groundwater is developed in part of a tunnel under construction,which lies in high initial geostress area,and is easy to suffer soft-rock large deformation.

In light of smooth blasting technologies currently available in China and tunnel construction practices,the author has carried out experimental study of smooth blasting in a deep narrow-bore soft-rock pilot tunnel that is located in Baozhen on the railway line between Yichang and Wanzhou with the purpose of providing technical support for similar blasing projects.

Nonlinear creep model and stability analysis of weak rock;

Numerical simulation on the S-shape stress-strain curve for weak rock;

Analysis of methods to determine the natural foundation s bearing capacity in weak rock under Nanjing area;