新鲜岩石
If we use MMA for bedrock consolidation grouting, the parameters of weakly weathered rock can be lifted to the level of slightly weathered or fresh rock.
用于基岩固结灌浆,能使弱风化岩体的参数提高到微风化或新鲜岩体的水平;
The kinetic energy is more than 98 percent and energy from effective thrust force is less than 2 percent when drilling in slightly weathered rock or fresh rock.
在风化程度较低或新鲜岩层中钻进时,破碎岩石98%以上的能量来自系统的动能,而轴压力推动钻头位移所给出的能量不到2%;
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