Covering hydraulic support group in fully-mechanized mining face with retraction triangular area

The fully-mechanized mining face retreat triangular area cover hydraulic support group is suitable for supporting the roof of the triangular area when the inclination angle is not greater than 15°. The support area of ​​the support group is coupled with the roof collapse form in the triangular area, which can make full use of the relationship between the surrounding rock of the roof for support. Complete the effective support of the exposed roof due to the removal of the support; the four-link stabilization mechanism has a large structural rigidity and good stability; the control method is electro-hydraulic control, which can be controlled remotely; The protective device can cover the gangue in the old pond and the side area; the arc structure at the front end of the top beam ensures smooth moving of the frame and avoids tearing of the top net. The cover support group in the retracted triangular area replaces the traditional well-shaped wooden pile and log point column joint support method, which has a high promotion value for ensuring the safety of the retraction operation, improving the efficiency of the retraction, reducing production costs, and ensuring safe production. .