Miner’s steel, also known as mining I-beam, is a specialized profile for mine roadway support, which complies with the YB/T24-1986 standard. Its material is mostly made of high-strength steel such as 20MnK and Q275, with main models of 9 #, 11 #, and 12 #, suitable for strong support scenarios in underground tunnels and tunnels of coal mines
The I-shaped section design is adopted, which has the structural characteristics of wide flange, thick web and small height. The pressure bearing capacity is strengthened through the trapezoidal inclined layout, which can effectively deal with the earth rock pressure of the roadway.
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