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When the situation of the mine and tunnel profiles at the place of use is examined; After the previous applications in wood, iron profile, stone and soil mixture compositions, the fortification sets specially designed and manufactured according to the underground openings, together with the locked connection equipment (traversal junctions, clamps) of the TH and K profiles developed with the new technology, can slide through (over) each other under certain forces. In Curved Mine and Tunnel fortification sets, TH profiles are most commonly used, although various geometric profile sections have been tried in which the set can slide through each other without deteriorating the quality and sensitivity of the set. In addition to the suitability of these profiles to slide through each other, another advantage is that their strength moments with respect to the x and y axes are very close to each other and they are more resistant to bending stresses. Under these physical and mechanical conditions, sliding supports become more advantageous than rigid support systems, and even thanks to this increase in load carrying capacity, the security level of underground galleries increases. Moreover;

• As a result of any accident or collapse in underground mine galleries or tunnel construction works, sufficient living space is created for the personnel working with the support systems that slide into each other, and the danger to human life is minimized.
• Support losses are reduced and costs are reduced with reusable supports.
• In the deformation zone, it ensures that the quality and integrity of the fortification and the base path are preserved intact. In the underground galleries, the floor path can continue to be used.
• As the fortifications slide through each other, the footpath section narrows, but the strength of the fortification increases.
• The fortifications on the base path have the ability to self-adjust to carry equal loads at every point. Thus, unbalanced and overloading at the connection points in the fortification is minimized.
• It helps in adjusting and regulating the internal friction forces in the fractured and crushed area around the mine and tunnel, especially in bent fortifications designed and bent according to the underground opening. The more sensitive plastic zone shows a natural belt formation that carries a significant amount of the land load.
• As a result of any accident or collapse in underground mine galleries or tunnel construction works, sufficient living space is created for the personnel working with the support systems that slide into each other, and the danger to human life is minimized.
• Compared to wood, rigid steel and other fortifications used in previous periods, the load carrying capacity is quite high and provides long-term strength.