The kerf is the outside boundary of the tunnel wall that a boring machine gouges out as it bores through the ground or rock.
切口在隧道壁边界的外面，隧道壁是由钻机在钻透土地或岩石时挖出的。
Through the author's effort, program BMP has the function of fore analysis and back analysis to the tunnel rock wall, it changes into a relatively perfect system.
BMP程序对隧道围岩具有正分析和反分析功能，并且通过作者的努力，其成为了一个比较完善的系统。
Because the structural response differs with differing tunnel shape, wall rock properties, and initial stress state, the safety of the tunnel in different location should be estimated respectively.
由于隧道的形状、岩性及其初始应力状态的不同，结构不同部位的动态响应有较大的差别，应分别评价其危险性。
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