Besides some measures for reducing BYof borehole blasting application in open pits are provided here.
提出了露天矿深孔爆破中降低大块率的技术措施。给出了矿山应用的实例。
This paper analyses problems concerning the conventional continuous loading structure in open mining deep borehole blasting.
本文分析了露天矿深孔爆破长期沿用的连续装药结构存在的问题。
Taking two of projects as examples, the paper discussed the technology of large diameter borehole blasting applied in the excavation of footing groove in city.
以两个工程为例，介绍了在城镇基坑开挖工程中采用了大孔径深孔爆破技术。
According to the time to form the blasting free face and the time for the broken rock flying, the paper discussed the rational delay time of each functional borehole in deep borehole blasting.
根据爆破自由面形成的时间和破碎岩石飞行的时间，探讨了深孔爆破各作用炮眼的合理延期时间；
The quality of borehole directly influences the effect of blasting.
钻孔质量的好坏，直接关系到爆破效果的优劣。
The essay expatiates the techniques of borehole in surface blasting, and instructs the construction of borehole in surface blasting.
本文阐述了露天深孔爆破的钻孔施工工艺，对露天爆破钻孔有参考和指导作用。
It showed that eccentric pressure is produced by eccentric decouple charge blasting on borehole wall.
实验结果表明，偏心不耦合装药在孔壁上形成明显的偏心应力场。
The isochromatic fringes graphs of smooth blasting and cutting seam blasting of pipe protecting borehole wall were obtained upon dynamic photo-elasticity experiments on both kinds of blasting.
进行了光面护壁爆破和切缝护壁爆破技术的动态光弹性试验，获得了光面护壁爆破和切缝护壁爆破过程的等差条纹图。
Considering the friction of borehole wall against water moving with high speed, a physical model of water stemming movement in water blasting is set up in this paper.
本文计及水在高速运动时与壁面的摩擦阻力，建立了水封爆破水塞运动的物理模型。
The present paper discussed the blasting plan, pretreatment, separately blasting with its borehole layout and net parameters, the design of detonation nets and the measures taken in the blasting.
本文论述了爆破方案的选择，预处理，分体式爆破的炮孔布置及孔网参数，起爆网路设计以及所采取的爆破安全措施。
Based upon blasting mechanics theory, pressure on the wall of borehole and blast stress field are gained in the course of detonation with air cushion charging construction.
利用爆炸力学理论，得到空气垫层装药爆破的孔壁压力及其爆炸应力场。
This paper introduced the principle and method of protecting borehole wall blasting and its application in the Dongxia and Weifang coal mine.
本文介绍了护壁爆破原理和方法以及其在东峡煤矿、潍坊煤矿的应用情况。
Because of the weak borehole sealing and inadequate use of the initial free face, the higher investment and unsatisfactory blasting effect still exist in the mine tunnel excavation blasting.
由于炮孔堵塞不牢和初始自由面利用不充分，井下平巷的掘进开挖爆破仍存在投入大、爆破结果欠理想等问题。
The paper introduced the excavation features, blasting method and parameters, construction technology and organization of the shallow borehole smooth blasting technology in clay and rock roadway.
介绍了浅孔光爆技术在黏土岩中的掘进特点、爆破方法及参数、施工工艺及组织。
The variation in acoustic velocity along the borehole and the influence of blasting on excavation damaged zone (EDZ) are studied based on the in-situ testing results.
基于松动圈的现场测试结果，研究声波波速沿孔深的变化规律以及爆破施工对于松动圈的影响。
Mechanism of smooth borehole wall protection blasting and calculation method of the charge are analyzed in this paper.
分析了光面护壁爆破的机理和装药量的计算方法。
The research into explosion pressure on the wall of a borehole occupied a very important place in the study work about the mechanism of rock fragmentation by blasting.
炮孔孔壁压力问题在爆破机理研究中占有极其重要的地位和作用。
Dynamic photo elasticity experiment is conducted, and the isochromatic fringes graphs in the process of smooth blasting of pipe protecting borehole wall is obtained.
进行了光面护壁爆破和切缝护壁爆破技术的动态光弹性试验，获得了光面护壁爆破和切缝护壁爆破过程的等差条纹图。
The shear stress on smooth blasting of pipe protecting borehole wall between free face and protecting face reaches as high as 3.
进行了光面护壁爆破和切缝护壁爆破技术的动态光弹性试验，获得了光面护壁爆破和切缝护壁爆破过程的等差条纹图。
Test shows that the blasting effect of cylinder cut of ms blasting in borehole is better than that of cylinder cut.
试验结果表明，孔内微差分段掏槽优于筒形掏糟。
Test shows that the blasting effect of cylinder cut of ms blasting in borehole is better than that of cylinder cut.
试验结果表明，孔内微差分段掏槽优于筒形掏糟。
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