Timbering of branching mine galleries

1. The timbering of branching mine galleries consists of the carrying framework, arced elements fixed to the framework by means of cross-shaped articulated joints, longitudinal stretcher bars fixed to arced elements and joining components. Characterized in that: The connector (4) fitted into the opening (5) in the lateral wall (6) of the framework (1, 2) is the principal element of the cross-shaped articulated joint. In the front, it has the opening (12) which accommodates the bolt (14), while in the back, it has a shaped end, which consists of the part (7) with the cross-section slightly smaller than the outline of the opening (5) and the projections (8, 9), reaching outside the outline of the opening (5). The projections (8, 9) are shaped to fit to the lateral wall (6), while ensuring the connector (4) to rotate around the axis, the projection of which on the lateral wall (6) crosses with the projection of the longitudinal axis of the opening (12).