Fracture Growth and Board Kind Structure and It's Non-equal Support in Surrounding Rock of Roadway of Fully Mechanized Caving Coal Face;

Analysis and control of distortion of surrounding rock of roadway at deep ground of mine

Variation of anchoring force during the course of deformation and failure of surrounding rock;

Physical simulation test of damage character of surrounding rock under different levels of the horizontal stress

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.

Under engineering stresses in colliery,deformation of multiple structure of roadway surrounding rock is complex and unbalanced.

According to the strata character round the coal seam,the structure character of roadway surrounding rock in coal mines has been analysed systematically by three type.

In this paper, compositive research techniques including of theoretical analysis, numerical simulation and in-situ measurement are carried out to investigate the destructive mechanics of roadway surrounding rock, law of roadway deformation.

The artificial neural network provides us a new theoretical method on the stability classification of roadway surrounding rock.

In order to control the occurrence of such disasters,using acoustic emission and real-time borehole imaging tool monitoring the whole process of surrounding rock "injury-rupture-instability",will provide a basis for control of the surrounding rock instability.