Profile: U-shaped steel bracket is a passive support, has good mechanical properties, high tensile strength, compressive strength, but also has good toughness properties, initial support higher power, a large supporting strength, can be used repeatedly It is widely used in mining roadway, especially in the deep complexity of the roadway and soft coal roadway, U-shaped steel bracket is an effective and reasonable support form. Purpose: U-shaped steel bracket main purposes: for mine tunnel, mine tunnel secondary support, and Brace mountains tunnel. Force state: U-shaped steel bracket is the best stress state after wall after filling evenly compacted under pressure, as the surrounding rock pressure values ??for U-shaped steel bracket reaches a certain value, the stent will produce compression, so Wai rock acts on the pressure drop on the U-shaped steel bracket, thus avoiding carrying capacity of surrounding rock pressure is greater than U-shaped steel bracket leaving the stent damage. Advantage: U-shaped steel bracket with a scalable and reliable than other rigid support carrying capacity, load and adapt to soft rock deformation section utilization, facilitate support bracket back, a small amount of maintenance, support recovery reuse rate, reduce prop use, environmental benefits are clear.