Safety Distance Of Blasting High-Tension Line In Open-Pit Mine

Heidaigou open-pit mine is the only open-pit mine in China that adopts cast blasting– dragline stripping technology. After 14 years of technology introduction, absorption, digestion, and innovation, Heidaigou open-pit mine has rich on-site practical experience in applying this technology. At present, the stope has advanced to the second mining

In view of the near slope blasting in Barun open-pit mine, which has merged sublevel mining, the operation safety conditions of middle-sized and large equipment in the second phase expansion are ...

Blasting prediction and parameter optimization can effectively improve blasting effectiveness and control production energy consumption. However, the presence of multiple factors and diverse effects in open-pit blasting increases the difficulty of effective prediction and optimization. Therefore, this study takes blasting fragmentation as the prediction indicator and …

The objective of this case study was to establish a safe blasting guideline that can secure the safety of pit slopes against blast-induced ground vibrations in Pasir coal mine, …

The blasting of open pit mine slopes can lead to slope deformation and damage, potentially resulting in safety hazards in some nonmining areas that should be kept stable. …

Aqueous media blasting is a potential research direction to improve the blasting eect of open pit mine rock, as seen in other areas of aqueous media blasting research. However, some research has ...

The drill-blasting method is a commonly used mining technique in open-pit mines, and the peak particle velocity (PPV) caused by blasting vibrations is an important indicator for evaluating the rationality of blasting mining design parameters.To develop an effective PPV prediction model, a parameter self-optimizing RUN-XGBoost prediction model is implemented …

In order to study the stability of the high and steep slope of an open-pit mine under deep bench blasting vibration, a mine in Inner Mongolia is taken as the engineering background, and the ...

The application and research of engineering blasting technology in national economy and national defense construction has a long history. Since modern open pit mine stripping works are mostly carried out under the condition of high mountains and complex changes of wavy micro-topography, it is very important to establish blasting characteristics and …

As the key technology of high-step stripping and blasting engineering, throwing blasting will be the development trend of the production optimization and benefit maximization of the open-pit mine in the future. In order to break with the research idea of optimizing the cast blasting effect by improving the effective throwing rate for a long period of time, maximizing the …

A new blasting approach of combined blastholes with different diameters is proposed to solve the problems of oversize boulders and rock toes in open-pit mine.

mine designs should be undertaken such that the safe operation of open pits can be maintained for the duration of mining. Regulation 13.8 and this guideline contain a number of important …

Jianshan open-pit was 0–3.6m, but the blasting did not cause overall damage to the adjacent high and steep slopes. In the future, this model can be used to predict rock Optimization and …

The Qidashan open-pit mine is adjacent to the Lishan District residential area in Anshan City, with many residential buildings close to the pit boundary. The current pit is northwest–southeast trending, with a length of roughly 3400 m and a width ranging between 800 and 1200 m, and has been mined to a depth of −230 m (Fig. 1 b).

The results obtained from the blasting were very satisfactory; it was found that charging with a top air deck, as compared to current blasting practices, causes a decrement in the specific charge ...

Optimization of drilling and blasting operations in an open pit mine-the SOMAIR experience. Mining Sci Technol 2009;19:736–9. [3] Afum BO, Temeng VA. Reducing drill and blast cost through blast ...

Abstract In the process of Open-pit mining in China, throwing blasting is an impor-tant method, which is very likely to cause serious damage to the slope of the discharge field under the action of vibration load of throwing blasting. With the background of throwing blasting process in Heidaigou open-pit mine in Ordos, vibration velocity

The use of presplitting with the blasting programme for an open-pit copper mine produced a significant improvement in the soundness of the final slope face. As a result of the increased quality of the cut slopes, the mine management were able to adopt 20 m high benches with a steep overall slope angle of 60".

In order to reduce the large rocks produced by blasting of hillside open-pit mine with heterogeneous and complex rock mass in arid area, based on the lithology characteristics of complex rock mass ...

A large number of burnt rocks in some open-pit mines in Xinjiang, Inner Mongolia and Ningxia have a great influence on the blasting effect. For this kind of rock, through the analysis of physical and chemical changes, combined with ANSYS/LS-DYNA and PFC 2D numerical simulation software, a burnt rock model with multiple joint cracks and irregular …

The research findings can be used in industrial testing, for retention of exposed rock surfaces (benches and pit walls, unsupported side walls of rooms and pillars, etc.) during large …

As the key technology of high-step stripping and blasting engineering, throwing blasting will be the development trend of the production optimization and benefit maximization of the open-pit mine ...

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; controlling excessive ground vibrations; and filtering the effects of …

The propagation process of blasting vibration has always been a difficult problem affecting the stability of high slopes in open-pit mines. Taking the Jianshan Phosphorus Mine as the research background, combined with engineering geological investigation, field blasting test, blasting vibration monitoring, numerical simulation technology, and theoretical analysis, the three …

In order to improve the mining efficiency and ensure the blasting safety of limestone mine, the bench blasting scheme and its parameters of hole network are designed based on theoretical analysis and field experience, taking a limestone mine in Sichuan Province as the research background. At the same time, the blasting effect is analysed and evaluated by the safety …

Shots with all carried out blasting operations have been distributed in several rows with the dip of 80 has been 3,0-3,3 m while the distance among rows has been 2,8-2,9 m. The distance of the first row of shots from the level edge has been 1,6- 2,0 m.

This paper deals with problems related to the determination of safe distance with special reference to adverse effects accompanying blast work. One of them is related to the seismic …

During blasting operations in open pit mines, most of the blast energy (approximately 40%) is wasted due to ground vibration. This phenomenon causes damages to the surrounding structures and pit ...

In levels of vibrations can damage the open pit slopes or underground pillar and lead to subsequent problems of safety and subsequent recovery of ore from the blast affected areas. In stopes, damage to the hanging wall can lead to slabbing, high dilution, and need for secondary blasting to relieve ore passes that become blocked by large ...

The industrial explosives used in the open-pit are mainly emulsion explosives and ammonium oil explosives, and the initiation network of the non-electric detonator initiation network is widely used. It can realize millisecond delay segmented blasting, improve blasting quality, and reduce blasting flyrock, blasting vibration, and other hazards.