Study on roadway layout and support technique in deep isolated coal pillar
NIU Zongtao
GUO Jun
Abstract：In oder to solve the problem of the reasonable layout of the roadway in the deep seams and the control of the surrounding rock,based on the actual geological conditions of a mine,width of coal pillar,distribution of coal pillar and water of old goaf are the three main factors influencing the layout of the roadway.The advantages and disadvantages of five roadway layout schemes are compared and analyzed by numerical simulation,and the optimum roadway location and surrounding rock control scheme are given,and industrial test is carried out.The results show that the internal stress of the isolated coal pillar is arch distributed,the central vertical stress of coal pillar is maximum,the concentration factor reaches 2.4.The vertical stress in the range of 7～10 m and 19～22 m in the coal pillar changes gently.The optimal location of the roadway layout is from the working face goaf area 8m;according to the stress distribution characteristics of the surrounding rock in the pillar of the isolated coal pillar,the asymmetric support scheme of the roadway working slop is adopted in the field,and the surrounding rock monitoring shows that the roadway meets the safety production requirements.
Keywords：isolated coal pillarroadway layoutasymmetric supportsurrouding rock control
Publication Date：2017-01-01