Study on Repair and control technology for failed ingate in deep soft rock of mine shaft

To control deformation of a deep soft rock tunnel,an engineering experiment of unloading blast in high stressed soft rock was carried out at Xieqiao coal mine,Huainan Mining Group Corp,which improves fully the stress state of surrounding rock mass and controls effectively the amount of rock deformation and its stable time.

In deep soft rock roadway,supporting technologies and methods which have been adopted in shallow engineering are not applicable due to complex engineering geological conditions.

IRMR method for evaluation of surrounding rock quality in deep rock mass engineering;

Intelligent design method for soft rock engineering supporting based on tow layer support vector machines;

Application of numerical method of large deformation to soft rock engineering;

Research on reliability of underground soft rock engineering;

In order to obtain the rule of creep failure of high ground stress rock, the process of creep failure of surrounding rocks is simulated under the action of high ground stress at different depths in deep engineering, then time-creep, horizontal ground stress (depth)-creep curves and time-horizontal ground stress (depth)-creep curved surface are obtained.

Based on the studies of the particular geomechanical environments of deep engineering rock mass and its nonlinear mechanical characters,the conception system is put forward,which poi.