Characteristics of mining pressure manifestation with paste filling in irregular multi open-off cut face
In view of the characteristics of the mineral pressure manifestation of the No.31322 multi open-off cut face in Dai Coal Mine,through the combination of field measurement and numerical simulation,the characteristics of the surrounding rock movement in the roadway,the weighting characteristics of the filling face,the lateral abutment pressure distribution characteristics and the overburden movement characteristics of the filling face were studied,and the statistical analysis on the strength of the filling body,the compression amount of the filling body and the filling rate was carried out.The research results showed that there was no obvious weighting in front of the filling working face,and the influence of advance mining and lateral support was small;the roadway roof separation was very small,and the roadway integrity was good;with the advance of the filling face,the load of the overlying strata was gradually transferred from the coal body to the filling body,and the strength of the filling body after 47 m behind the filling face would tend to be stable,and the strength of the filling body was greater than the design strength,meeting the filling requirements;the average filling rate of the filling face was 98.5％,the settlement of the filling body was 80 mm,the compression rate was 2.0％,and the supporting effect of the filling body was good.
irregular working facepaste fillingmineral pressure manifestationnumerical simulationfield measurement
万方数据
维普
