المنتجات الساخنة
Blasting excavation and stability control technology for
网页2023年2月14日 Presplitting blasting was applied for the slope rock excavation. It is a contour blasting technology, which plays dense holes (I1) with small explosives along contour line to blast a fissure first. It is to prevent reserved rock damage caused by main
Contact
Research and Application of Integrated Presplitting
网页2021年10月9日 Figure 4(b) shows the principle of directional energy-accumulation presplitting blasting rock. The purpose is to cut off the roof of the roadway and the roof of
Contact
Pre-Split Techniques: A Review Agg
网页1 天前 Julian Cleeton, director of Stemtek, examines the conventional and alternative methods for achieving a stable face. Pre-splitting can be defined as ‘a technique using
Contact
(PDF) Comparison of Presplit and Smooth Blasting
网页2019年4月23日 Sometimes presplitting blasting, Zou et al. [10] analyzed the influencing factors of smooth blasting effect of rock tunnel using numerical simulation method from
Contact
(PDF) ROCK BLASTING FOR MINING
网页2017年4月15日 To simplify the work, rock blasting is the easiest way. In mining operations, blasting has become a routine work. there is a need to restrict the blasting z
Contact
Presplitting excavation technique Britannica
网页Other articles where presplitting is discussed: tunnels and underground excavations: Sound-wall blasting: met by the technique of presplitting, developed in the United States in the
Contact
Precision Presplitting: The Basics Rock Products Magazine
网页2016年5月26日 PRECISION PRESPLITTING IS BEING USED IN THE BLASTING INDUSTRY TO INCREASE SAFETY AND PREVENT OVERBREAK IN WEAKER
Contact
Out With the Old, in With the New: The Modern Method
网页2020年1月14日 A Proper Presplit Creates a Safer Working Environment While Reducing Costs. By Anthony J. Konya and Calvin J. Konya Geology is often blamed for poor blast
Contact
Design of controlled blasting (pre-splitting) in Golegohar
网页Pre-splitting is a controlled blasting technique with applications in open pit mines. The main objectives of pre-splitting in open pit mining are: preventing/controlling back-break;
Contact
Blasting excavation and stability control technology for
网页2023年2月14日 Presplitting blasting was applied for the slope rock excavation. It is a contour blasting technology, which plays dense holes (I1) with small explosives along contour line to blast a fissure first. It is to prevent reserved rock
Contact
Precision Rock Excavation: Beyond Controlled Blasting and
网页2021年9月9日 Comparison between the results achieved with presplitting blasting (left—red dashed line) and normal blasting (right—yellow dashed line) for a surface excavation . If the parallelism of the holes, the correct spacing, and a good decoupling between the diameter of the holes and that of the charge are respected, the result is a
Contact
(PDF) Comparison of Presplit and Smooth Blasting
网页2019年4月23日 Sometimes presplitting blasting, Zou et al. [10] analyzed the influencing factors of smooth blasting effect of rock tunnel using numerical simulation method from the perspective of weight.
Contact
Influence of discontinuities on presplitting effectiveness
网页2009年4月1日 The results of this study have shown for this rock type that there is a significant decrease in the presplit quality with increased joint frequencies and that presplit quality decreases with an increase of relative orientation from 5° to 30°. These findings are consistent with theory presented in the literature.
Contact
Application Ofpresplitting And Smooth Blasting For
网页1987年6月29日 ABSTRACT. ABSTRACTInvestigations by the authors during surface and underground excavations indicated that the success of presplitting and smooth blasting was largely depended on the nature and orientation of joints and bedding planes in the rock mass. The stone describes the results obtained when the above two techniques were
Contact
PRESPLITTING ROCK SLOPES FOR HIGHWAYS
网页PRESPLITTING IS ACCOMPLISHED BY DRILLING HOLES ON ONE AND ONE-HALF TO FIVE FOOT CENTERS ON THE SLOPE PLANE AND SHOOTING THE HOLES WITH DYNAMITE USING PRIMACORD. THE DRILL HOLES ARE MADE BY PERCUSSION TYPE DRILLS. THE AIR SPACE AROUND THE EXPLOSIVE IS FILLED WITH FINE
Contact
最新爆破安全规程..doc 原创力文档
网页2017年1月6日 3.7 岩土爆破 rock blasting 利用炸药爆炸能量对岩土介质做功，以达到预期 3.16 预裂爆破 presplitting blasting 沿开挖边界布置密集炮孔，采取不耦合装药或装填低威力炸药，在主爆区之前起爆，从而在爆区与保留区之间形成预裂缝，以减弱主爆孔爆破
Contact
CHAPTER 3 ROCK EXCAVATION METHODS Asad Aijaz
网页Illustration. Excessive backbreak caused by blasting perpendicular to jointing (modified from Konya and Walter 2003). 15 f CHAPTER 3 ROCK EXCAVATION METHODS When blasting perpendicular to the final slope face, discontinuities occurring at sharp angles from the excavation plane tend to have the biggest effect.
Contact
TBM专用英语 搜档网
网页岩爆rock burst 浅孔爆破short hole blasting 深孔爆破long hole blasting 光面爆破smooth blasting 预裂爆破presplitting 锚喷支护shotcrete and rock bolt support 钢架steel frame or beam support 超前支护advanced support 管棚pipe-roof protection
Contact
斜面台阶爆破试验,Inclined bench blasting experiment英语
网页2015年10月18日 18.A Practice of Presplitting Blast for Long Hole Benching in Multi-Governing Factor Condition多控制因素条件下深孔台阶预裂爆破的实践 相关短句/例句 rock-bench blasting test岩台爆破试验
Contact
Experimental study on rock-breaking load in slot-hydraulic
网页2019年10月6日 Slot blasting is widely used in mining and tunnel construction, municipal demolition, water conservation, hydropower, and other related projects due to its low cost and high efficiency. In the slot-blasting technique, it is necessary to break the rock efficiently and minimize the damage to the area surrounding the rock. Therefore, improving the
Contact
Study on the mechanism of crack formation and the
网页2020年10月26日 [14] Xue H, Gao Y and Zhang X 2019 Directional Blasting Fracturing Technology for the Stability Control of Key Strata in Deep Thick Coal Mining Energies 12 4665. Google Scholar [15] Bai Y and Zhu W 2013 Numerical simulation on two-hole blasting under different in-situ stress conditions Rock and Soil Mechanics. 2013 in Chinese.
Contact
围岩损伤控制爆破数值模拟研究
网页2014年10月1日 摘要. 摘要: 为研究不同结构装药周边孔爆破对围岩损伤的影响规律,采用数值模拟方法开展了研究工作. 模拟结果表明,从获得良好爆破效果和降低围岩损伤的角度来看,在4种装药结构中,水+切缝管的效果最好,空气介质耦合时最差,中间依次为水介质耦合、空气+切
Contact
杨晓杰 百度学术
网页合作机构 中国矿业大学(北京)力学与建筑工程学院 27 深部岩土力学与地下工程国家重点实验室 21 中国矿业大学 17 中国矿业大学(北京)地球科学与测绘工程学院 12 中国矿业大学岩土工程研究所 10 中国科学院地质研究所 9 中国矿业大学力学与建筑工程学院 6 中国
Contact
最新爆破安全规程..doc 原创力文档
网页2017年1月6日 3.7 岩土爆破 rock blasting 利用炸药爆炸能量对岩土介质做功，以达到预期 3.16 预裂爆破 presplitting blasting 沿开挖边界布置密集炮孔，采取不耦合装药或装填低威力炸药，在主爆区之前起爆，从而在爆区与保留区之间形成预裂缝，以减弱主爆孔爆破
Contact
CHAPTER 3 ROCK EXCAVATION METHODS Asad Aijaz
网页Illustration. Excessive backbreak caused by blasting perpendicular to jointing (modified from Konya and Walter 2003). 15 f CHAPTER 3 ROCK EXCAVATION METHODS When blasting perpendicular to the final slope face, discontinuities occurring at sharp angles from the excavation plane tend to have the biggest effect.
Contact
Missouri University of Science and Technology
网页2020年11月4日 Missouri University of Science and Technology
Contact
TBM专用英语 搜档网
网页岩爆rock burst 浅孔爆破short hole blasting 深孔爆破long hole blasting 光面爆破smooth blasting 预裂爆破presplitting 锚喷支护shotcrete and rock bolt support 钢架steel frame or beam support 超前支护advanced support 管棚pipe-roof protection
Contact
ROCK BLASTING and CONTROL OF VIBRATION:
网页2011年11月1日 shear plane in rock at a certain slope by limiting the effects of blasting with presplitting, cushion or trim blasting. The purpose of controlled blasting is to construct stable rock cut slopes without damaging the rock face. Production blasting is used to fracture rock in manageable sizes for excavation. Trench blasting is used to create
Contact
斜面台阶爆破试验,Inclined bench blasting experiment英语
网页2015年10月18日 18.A Practice of Presplitting Blast for Long Hole Benching in Multi-Governing Factor Condition多控制因素条件下深孔台阶预裂爆破的实践 相关短句/例句 rock-bench blasting test岩台爆破试验
Contact