Numerical Simulation Study of Deep Whole Pillar Intermittent Mining

To solve the problems of large amount of deep pressed coal under the building and low recovery rate of coal resources,the whole pillar intermittent mining is put forward by using principle that deep mining is not easy to achieve full extraction of surface and combining the advantages of strip mining and whole pillar mining.The results show that deep mining of the whole pillar intermittent mining technology,using the features of small surface deformation of utmost non-full extraction,makes buildings only impacted by the first phase static deformation and dynamic deformation of the whole pillar joint mining stage,which could reduce or eliminate the damage to the ground protection object.