Abstract: 【 Abstract 】:Aiming at the problem of broken roof and poor stability of fully mechanized mining face, a new idea of roof top control technology was put forward. The roof reinforcement was carried out in front of the coal wall in the roof of fully mechanized mining face, and Ma Lisan chemical grouting agent was strengthened. The roof control technology scheme combining Rock's foam filling and the three is applied in the field at the Xiaoji Khan 11217 fully mechanized mining face. The results show that the technical innovation scheme effectively controls the roof of the fully mechanized mining face, and the stability of the surrounding rock of the working face is enhanced, which realizes the safe and efficient recovery of the fully mechanized mining face.