适用于轻型回转钻机钻进软岩、中硬岩、硬岩等各类地层，钻头采用多点破碎，效率较高。
For soft rock, the hard rock, hard rock and other strata, multi-point drill bit broken efficient.
首次在硬岩矿山采空区评价中引入综合模糊评价理论，建立了采空区灾害危险度多因子评价模型。
Fuzzy integrated assessing theory was used in hard rock mine goaf for the first time and multifactor assessing model for goaf hazard degree was also constituted.
而合理的硬岩巷道中深孔掘进爆破参数则一直是需要研究解决的技术难题。
But appropriate the blasting parameters of medium deep blasting in hard rock tunnel is always a technical problem need to be solved.
本文介绍一种测量硬岩中爆炸应力波的压电传感器。
A quartz piezoelectric transducer used for measuring stress induced by explosion in hard rock is described.
在软硬相间的层状岩体中地应力分布很不均匀，应力大小与岩层硬度具有正相关性，硬岩中的水平应力大于软岩的水平应力。
The stress distribution is far from uniform in this stratified rock, the horizontal stress magnitude in hard rock layers is significantly higher the that in soft layers.
在结构上采用了三翼四齿的钻头体、弧槽形排粉沟槽，适用于硬、中硬、软岩的三种齿形。
The drill bit body has three wings four cylindrical tungsten carbide inserts and curved slots for removal of cuttings.
目的：研究颅中窝硬脑膜外经颞骨岩部入路进行岩斜区直接手术的手术方法，并提供相应的解剖依据。
Objective: To study the operative technique for extended middle fossa extradural transpetrosal approach to petroclival region and to provide correspondingly anatomical basis.
试验表明：强力复合掏槽在特硬岩立井掘进爆破中应用效果良好；2。
The results show that mighty compound cutting can give a good effect of sinking and blasting in hard rock shaft, and sinking velocity adopted for 2.
实践证明tBM在硬岩地质条件下施工过程中，刀具的费用要达到机组施工成本的三分之一左右。
Practice has shown that disc cutters cost is about one-third of the total cost of TBM working, when the TBM is breaking hard rock.
在硬岩中中隧道可采用凿岩台车钻眼，进行全断面开挖。
Tunnel in hard rock may be excavated in whole section by using chiseling rock trolley to drill small holes.
硬岩隧道施工中炮眼利用率的大小关系着隧道的工程进度和工程成本。
The degree of Shothole utilization ratio in construction of hard-rock tunnel has relation to project advance rate and cost of the tunnel.
试验结果反映出在变形过程中不论是渗透性 -应变关系特点 ，还是渗透性量值 ，软岩和硬岩均表现出明显差异。
The test results show that the permeability of hard rocks is obviously different from that of soft rocks not only in permeability-strain behavior but also in value of coefficient of permeability.
试验结果反映出在变形过程中不论是渗透性 -应变关系特点 ，还是渗透性量值 ，软岩和硬岩均表现出明显差异。
The test results show that the permeability of hard rocks is obviously different from that of soft rocks not only in permeability-strain behavior but also in value of coefficient of permeability.
应用推荐