Study On Failure Mechanism And Supporting Measures Of Soft Rock Roadway In Xinjiang Shajihai Coal Mine

Reasearches on geological conditions and soft rock physical and mechanicalproperties in Shajihai coal mine have been performed, determining the type andstructural component of soft rock to be complex jointed-expansive; summarizes thecharacteristics of soft rock deformation and failure, combined with numerical analysisto identify the key parts of the roadway. The main factors affecting the stability ofroadway surrounding soft rocks are studied, and also the fracture mechanics analysis ofthe deformation mechanism. Traditional support cannot fit to the swelling soft rock instability control; coupled control concept in large deformation of soft rock engineeringshould be proposed for the roadway stability control. The Constant Resistance andLarge Deformation (CRLD) technology has been introduced and applied to Shajihaisoft rock roadway by the use of CRLD bolts which have been tested by static tensileand dynamic impact laboratory test systems. Interaction mechanism of surroundingsoft rock and the CRLD bolts (anchor) is studied with corresponding stability controltechnology and supporting measures, applications of this support technology inShaJiHai coal mine soft rock roadways for t10000m in total with great support effectsin practice and this technology is proved to be reliable and effective.