1) shallow presplitting blasting
浅孔预裂爆破
1.
In this paper,combined with three kinds of scheme analysis of 5121(0) passing through a large geologic abnormal place,shallow presplitting blasting and coal cutting technique were put forward.
本文结合实际对5121(0)薄煤保护层工作面过一大面积地质异常区采取三种方案进行分析,提出了较为可行的浅孔预裂爆破松动岩石配合煤机割煤安全技术。
2) deep-hole presplitting explosion
深孔预裂爆破
1.
Numerical simulation of improving permeability by deep-hole presplitting explosion in loose-soft and low permeability coal seam;
高瓦斯低透气性煤层深孔预裂爆破增透数值模拟
2.
In this dissertation, several researching methods, such as theory analysis and numerical simulation and on-field experiment as well as practical engineering application, are used to systematically study the promoting permeability effect of deep-hole presplitting explosion as well as action mechanism of promoting gas drainage and preventing coal-gas outburst.
深孔预裂爆破为高瓦斯低透气性煤层增透,进而解决高瓦斯低透气性煤层瓦斯抽采难题提供了一条新的有效的途径。
3) deep-hole pre-splitting blasting
深孔预裂爆破
1.
The vibration testing analysis of blasting in Tai-Chang freeway show that it is chamber & deep-hole pre-splitting blasting that can strikingly drop the seismic effect of chamber blasting,so it effectively solves some problems of slope stability,slope quality and safety of building & structure that blasting vibration brings about.
硐室加深孔预裂爆破能够显著地降低硐室爆破所带来的地震效应,有效地解决爆破振动所造成的边坡稳定性、边坡质量和爆区附近建(构)筑物的安全问题,适用范围比较大。
2.
The vibration testing analysis of blasting in Tai Chang Exprassway shows that chamber & deep-hole pre-splitting blasting can strikingly drop the seismic effect of chamber blasting,so it effectively solves some problems of slop stability,slop quality and safety of building structures caused by blasting vibration.
太长高速公路的爆破振动测试分析表明硐室加深孔预裂爆破能够显著地降低硐室爆破所带来的地震效应,有效地解决爆破振动所造成的边坡稳定性、边坡质量和爆区附近建(构)筑物的安全问题。
4) pre splitting blasting with water in Hole
水孔预裂爆破
5) Large-diameter hole presplitting blasting
大孔径预裂爆破
6) pre-splitting blasting with wide pitch of holes
宽孔距预裂爆破
1.
At present, the pre-splitting blasting with wide pitch of holes already obtained the experiment in the domestic and foreign large-scale mines, and has also yielded certain experimental results, moreover the pre-splitting blasting with big aperture, the width pitch of holes was a future development direction to practical application in the mine.
因此有必要对宽孔距预裂爆破在水电系统中的试验进行深入的研究。
补充资料：预裂爆破
沿设计开挖轮廓面钻孔,先于其他炮孔起爆,以形成一道贯穿性的裂缝面，使非爆破区免遭破坏的控制爆破技术。预裂爆破技术具有超挖量少，围岩完整和爆破振动轻等优点，广泛用于露天和地下工程开挖。预裂爆破于20世纪50年代初期由瑞典首创，它是由周边爆破（即沿开挖边线采用密集钻孔和少量装药的爆破法）和光面爆破发展的结果。中国葛洲坝水利枢纽和东江水电站曾大规模应用，均获得显著的技术和经济效益。
应用预裂爆破技术，关键在于正确选定预裂孔间距(ɑ)、孔径(d)和线装药密度(Q)(即单位长度钻孔的装药量，g/m),及采用药卷直径(de)小于孔径(d)的不偶合装药方式。常用的孔距ɑ＝(6～10)d,岩石软弱或孔径较大时取小值，岩石坚硬或孔径较小时取大值。线装药密度与孔距、孔径、岩性和炸药品种密切相关。不偶合系数（即d/de）一般为2～4。上述诸参数主要应通过现场爆破试验确定。炮孔药卷可采用线状连续或柱状间隔的形式，但间隔以控制在10～30cm为宜，均采用导爆索连续同时起爆。预裂爆破的质量标准是：爆破形成的表面缝宽一般不小于1cm；预裂面的不平整度不大于15cm;孔壁表面没有明显的爆破裂隙。
应用预裂爆破技术，关键在于正确选定预裂孔间距(ɑ)、孔径(d)和线装药密度(Q)(即单位长度钻孔的装药量，g/m),及采用药卷直径(de)小于孔径(d)的不偶合装药方式。常用的孔距ɑ＝(6～10)d,岩石软弱或孔径较大时取小值，岩石坚硬或孔径较小时取大值。线装药密度与孔距、孔径、岩性和炸药品种密切相关。不偶合系数（即d/de）一般为2～4。上述诸参数主要应通过现场爆破试验确定。炮孔药卷可采用线状连续或柱状间隔的形式，但间隔以控制在10～30cm为宜，均采用导爆索连续同时起爆。预裂爆破的质量标准是：爆破形成的表面缝宽一般不小于1cm；预裂面的不平整度不大于15cm;孔壁表面没有明显的爆破裂隙。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条