Abstract:

In order to enhanced coal resources recovery, alleviate mining and excavation, to achieve safe and high-efficient secondary mining of fully mechanized mining face,at the same time,and to provide for production practice of mining under similar conditions of mining face.The paper in detail introduced the technology of the old roadway driving security technology measures of fully mechanized mining face and safety mining technology of fully mechanized mining face crossing old roadway ,guidance of fully mechanized mining face secondary mining of the successful completion of the work.The engineering practice of secondary mining technology of old-entry goaf in fully mechanized mining face shows that: to the old-entry goaf without second mining,the recovery rate of working face have only 55.50%;If the second mining,the working face recovery rate can be as high as 96.67%.The continued improved and developed the secondary mining technology of old entry goaf could provide the scientific reliable technical access to the safety and high efficient mining in the old entry goaf.

Key words: old-entry, fully mechanized mining, roadway driving security, secondary mining technology