blast hole

In addition, our experiments also indicate that the best depth of blast hole is close to shaft radius.

此外，试验还表明最佳的炮孔深度接近于井筒的半径。

Effects of rare earth elements ( RE) on the carburizing process of blast hole rock bits are studied.

研究了稀土元素对牙轮钻头渗碳过程的影响。

Investigation in to the movement of stemming and its optimum length in blast hole

炮孔中炮泥运动规律及合理炮泥长度研究

Research on and Development in the Geo-physical Blast Hole Drill and Its Accessory Tools in Mountainous and Hilly Area

山地丘陵地区物探爆破孔钻机及配套机具的研究与开发

The automatic hoist device of cable of blast hole drills

牙轮钻机电缆自动卷扬装置

This paper describes the theory, features and testing results of the air reverse circulation drilling process used in geo physical blast hole drilling.

概述了空气反循环钻进工艺应用于物探爆破孔施工的原理、特点及其试验应用情况。

Popularization and Application of The New Explosion Technology in Which Bamboo is Laid at The Blast Hole Bottom as Spacer

孔底竹筒间隔装药爆破技术的推广运用

Experimental study on reasonable extra-depth of blast hole when space loading taking place at the bottom of inclined deep hole in open pit mine

露天矿倾斜深孔底部间隔装药爆破合理超深值试验研究

This paper describes the determination methods on main parameters of blast-hole drill.

介绍了牙轮钻机主参数的选择方法.

Application of Low Temperature Quenching of High Speed Tool Steel on Blast Hole Rock Bits

矿物的高频介电分离高速钢低温淬火在牙轮钻头上的应用

The blast tore a hole in the wall.

墙被炸开了个洞。

The paper introduces the rock blasting technology and 3 kinds of blast hole distribution suitable to different rock, and its remarkable application effect in practice.

文章介绍了针对不同矿岩条件进行的凿岩爆破工艺及3种典型布孔方法，并在实践中加以调整运用，取得了显著成效。

Using the shock wave theory, we tried to infer the propagation process of air shock wave which generated during the explosion within the blast hole.

利用冲击波理论，推测孔内导爆索爆炸产生空气冲击波的传播过程。

The temperature gradient in blast hole was also measured and the temperature gradient was relative to the blast hole depth and its temperature.

同时，还进行了炮孔孔内温度梯度的测量，它与炮孔深度及其温度有关。

Underwater Blast hole Drilling Technique

松花江水下爆破孔施工技术

Rotating reducer is an important part of blast hole , it holds biggest loads while drilling.

回转机构是牙轮钻机的重要工作部分, 在钻孔作业中承受最大的负荷.

Discussion on Blast Hole align in Tunnelling

掘进爆破中炮眼的设计探讨

Development of Software-stope Blast Hole Design

采场布孔软件的研制

Use of explicit dynamic analysis program make three-dimensional simulation with two shells fired in the blast hole the formation of shaped jet. 2.

本文主要研究内容有：1、利用显式动力分析程序对两发射孔弹在爆炸中聚能射流的形成过程进行三维模拟。

Water Pump Flow-rate Calculation at Air-sealed Blast Hole

压气封口式炮孔排水泵流量计算

Design of Sealing Length Between Piston and Cylinder of Hydraulic Blast Hole Drill

液压凿岩机活塞与缸体间封油长度的设计

Drilling Tool for Slotting on Blast hole Wall in Fracture-controlled Rock Blast

岩石断裂控制爆破孔壁切槽钻具

Spacing charging at blast hole bottom is studied to reduce the seismic, which can make the ratio of vibration reduction to 10-15% and reduce the ratio of boulder and root as accessorial method.

还进一步进行了孔底空气间隔器的降震实验的研究，其降震率达10～15%，作为张沟采场辅助的降震措施，并且有效地降低了大块率和根底的产生。

Analysis on Air Blast Wave in Surface Hole Blast in g

露天钻孔爆破中的空气冲击波分析

Studying the patterns of breaking rock of three-cone blast hole drill

牙轮钻机破岩形态的研究

Analysis and Comparison on Calculation Method for Blast-hole Average Grade

炮孔平均品位计算方法的分析与比较

Testing of the Air Reverse Circulation Drilling Process in Geo physical Blast hole Drilling

空气反循环钻进工艺在物探爆破孔施工中的试验应用研究

Study on vertical vibration parameters of three-cone blast hole drill

牙轮钻机纵向振动参数的研究

Digging Pile Blast Hole Wall Rock/ soil Dynamic Parameters Detection and Assessment

挖孔桩孔壁岩土动力参数探测和评价

The decisive factors causing whether the blast hole is plugged up

决定炮孔堵塞与否的因素