Particularity of mine column mining in ventilation

When returning to the mining column, the ventilation conditions are poor due to the presence of the surrounding mining space or the mining lane. If the external roadway is designed when returning to the mining room and the caving method is used to return to the mining column, the ventilation conditions in the quarry are more deteriorated.

It can be seen from the above situation that although the ore block is divided into two steps of mining and mining. However, the mining and mining pillars affect each other and are related to each other. They should be regarded as two aspects of the unity.

Therefore, when designing, we must consider their ground pressure management, structural size, mining roadway, ventilation system, mining process and the production capacity and technical and economic indicators of the ore block. In production, they should be uniformly arranged according to their output, the order and time of recovery, as well as the construction strength and progress, that is, overall arrangements.

CaSi Cored Wire

Silica-calcium wire is a core-coated wire made of silica-calcium alloy. Silicon calcium wire is usually added to the molten steel as an additive, in which the silicon element not only has a strong deoxidation capacity, but also has a good deoxidation discharge function. The removal of calcium metal can satisfy the deoxidation and desulfurization of molten steel, change the form of impurities, promote the floating of impurities, purify liquid steel, and improve the pouring ability of molten steel.

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