Study on Stability Control of Gob-Side Entry Retaining Structure Without Filling Wall in Hard Roof

In view of the deformation and instability law hard roof without side filling retaining roadway, based on systematic construction analysis force bearing model roadway structure, this article proposes control mechanical calculation method retaining, which takes anchor beam key block above to form cantilever together, with solid coal as foundation support. The research practice show that under condition roof, connection between gob-side entry mining face can be effectively cut off so improve structural configuration properties lateral blocks above, reduce damage upper strata subsidence goaf collapse roadway. Then, through strengthening by significantly enhance side, capacity beam, they share caused load deflection influence, in addition, bolting, reinforcement waste rock bolting supporting role better structure for stability, adaptability engineering applicability, is successfully applied practice. It worthy further application.