lifter cut

Combining the specific engineering practice,this paper discussed the theoretic and practical bases of reasonable lying of the cuttings hole toward characteristics of the big cross-section sap tunneling demolition,and calculated the reference quantity of explosive in single hole under condition of the mild-rigidity rocks.

文章结合具体工程实践 ,针对大断面坑道掘进爆破的特点 ,依据具体的工程要求 ,对深孔掏槽的布设参数作了探讨 ,提出了掏槽孔合理布设的理论和实践依据 ,并计算出了在中等硬度岩石中的参考单孔药量 ,对坑道掘进施工中的类似情况有一定的参考作用。

By using the LS-DYNA 3D nonlinear dynamic finite element software,the elasticity calculation model was established to analyze the generation and transmission of stress under explosive charge in 4 typical cutting patterns,those used in shaft excavation by one-step blasting were optimized and compared by numerical simulation to select the optimizing cutting patterns.

对坚硬岩石条件下深孔一次爆破成井的九孔、双孔菱形、单螺旋和双螺旋4种掏槽方式,在炸药爆炸荷载作用下的应力产生和传播机理进行了计算机数值模拟。

In this paper, the author combined the experience of tunnelling construction bystraight-in hole cutting blasting within 30 years in the country with the theory and practice in the blasting wor of Sweden, U.

该文系作者30年来在国内外隧道掘进施工中应用直眼掏槽爆破积累的经验，并在不断提高和改进过程中，大量汲取了瑞典、美国和加拿大等国家的理论与经验写成，对中等硬度及坚硬岩层隧道爆破掘进具有一定的理论和实用意义。

The movement law of the smashed rock mass in the cut blasting was studied using two phase flow method drawn on the experience of industry.

借鉴工业生产中的两相流动方法研究掏槽爆破中的颗粒运动规律。

Physical models of fragment discharge process are established and the fragment discharge law is discussed by the rational simplification of parallel-cut blasting process in this paper.

通过对直眼掏槽爆破过程的合理简化,建立了排碴过程的物理模型,研究了排碴规律,并通过实例对其合理性进行了验证。

sublevel undercut caving method

分段下部掏槽崩落开采

Study on Effect of Symmetry of Wedge-shaped Cutting Hole Angle on Cut Blasting

楔形掏槽炮孔角度对称性对掏槽效果影响研究

The Norwegian cut can provide more dependable advance per round than the plough cut.

挪威掏槽与楔形掏槽相比，可以提供更可靠的每次爆破的进度。

During recent years the seam cut has once again come into use.

近几年来，又再度使用了裂缝掏槽。

Study of Method of Conducting Smooth Blasting in Weak and Soft Surrounding Rocks

软弱围岩中光面爆破掏槽孔方案研究

If the charge used is too large, the rock can become sintered so that the cut used is a failure.

如装药量太大，岩石就会挤死，使掏槽失败。

Numerical Simulation Research of Charging Optimization in Spiral Cutting Blasting in Medium Deep Bore

中深孔掏槽爆破装药优化的数值模拟研究

Application of cut blasting in trench digging technique in the middle of the stope

掏槽爆破在采场中部掘沟工艺中的应用

A Study and Application of Methods of Longhole Cutting and Joint-cutting Cartridge in Shaft Excavation Blasting;

竖井中深孔掏槽和切缝药包法的研究与应用

The kibble hole arrangement optimization of tunnel digging blasting of Daanshan mine

大安山矿巷道掘进爆破掏槽孔布孔优化

Discussion About Blasting Footage and Cutting Patterns of Circular Tunnel in Supper Hard Rock

圆型隧洞超硬岩爆破进尺与掏槽方式探讨

Popularization and Application of Deep-hole Blasting Technique in Bottom Compound-term Wedge Cutting

底部复式楔形掏槽中深孔爆破技术的推广应用

Design of Combination of Smooth Blasting and Double-wedge Cut for Roadway Excavation

双楔形掏槽方法和光面爆破技术的综合设计

Application of Combined Slotting in Driving Hard Rock Roadway

混合掏槽技术在坚硬岩石巷道掘进中的应用

The loosening holes outside the plough cut are also drilled at an angle which improves the breakage possibility.

在楔形掏槽眼外侧的扩槽眼也要有角度以改善爆破效果。

Research on Size Effect of Empty Hole in Horizontal Roadway Cut Blasting & Accumulating Characteristic of Surrounding Rock Damage Caused by Frequently Blasting Vibration;

平巷掏槽爆破空孔尺寸效应及围岩频繁震动损伤累积特性研究

starting sheet cells

始极槽,种板槽,始板槽

groove-cutting chisel

槽刨, 油槽铲(轴承)