This paper theoretically analyzes the mechanism of truss bolt system, and gives the design of coal roadway support according to the characteristics of the "Three-soft" coal roadway.

从理论上分析了桁架锚杆系统的作用机理，并针对“三软”全煤巷道的特点，制定了全煤顺槽桁架支护方案。

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To analyze the deformation characters of soft rock roadway in Fengshuigou Coal Mine, provide corresponding preventive measures and have made good technology economic results.

分析了风水沟煤矿软岩巷道变形的特点，提出了相应的防治措施，在软岩支护方面取得了较好的支护效果和经济效益。

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Liangjia Coal Mine in Longkou mining area is a typical "three-soft" mining area, meeting many difficulties in roadway support.

龙口矿区梁家煤矿是典型的“三软”矿区，在巷道支护上遇到了非常大的困难。

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