Field test study on temporary support technology during dynamic loading of gob-side entry by roof cutting retaining in thick coal seam

In order to solve the problem of gob-side entry by roof cutting the new type of coal mining, the top plate is collapsed to form a loose body.The traditional roof support method cannot adapt to the problem of this type of roadway support.This paper takes the Shaanxi Coal Group Ningtiaota coal mine.The industrial test of gob-side entry by roof cutting mining is the engineering background.Two kinds of loose-top roof support schemes are designed respectively, and the amount of the bulk-supporting floor in the two schemes is compared and analyzed.The results show that pier support is more effective than single hydraulic prop in controlling roof and floor movement, and it provides more stable and reliable supporting conditions.The research results provide a new idea for temporary support during dynamic load of gob-side entry by roof cutting in thick seam, which is of great significance to the popularization of gob-side entry by roof cutting technology.