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一、参考译文由于夹层剥离作业,上述所有方法都会使A层煤遭受损失并影响其煤质。该矿调查了液压挖掘机剥除夹层和采煤的使用情况,并通过一台70吨级抓斗式挖掘机获得了使用液压挖掘机的初步经验。换向式反铲装置在这一特定工作场合中充分显示了其结构的长处。同时,我们也看到70吨级机的采掘力以及其工作范围都不能满足这种采掘要求。接着该矿使用了一台120吨级液压挖掘
A: As a result of mezzanine stripping, all of the above methods can cause loss of layer A coal and affect its quality. The mine investigated the use of hydraulic excavators for stripping and mining and obtained initial experience with hydraulic excavators through a 70-ton grapple excavator. Reversible backhoe device in this particular workplace fully demonstrated the strengths of its structure. At the same time, we also see that the mining capacity of the 70-tonne class machine and its working area do not meet this mining requirement. The mine then used a 120-ton hydraulic excavation