In order to study the characteristics of ground vibrations caused by production blasts in an open pit gold mine and to evaluate the impact of the vibrations to buildings, a seismic survey was conducted at an open pit mine. Two monitoring lines with multiple seismic stations were surveyed.

BLAST DESIGN (Figure 8-2) Staggered pattern (Figure 8-3) Sing ... The economic analysis of the use of explosives is an important part of blasting operations in mining and construction. Explosives are energy, and the efficient use of this energy is a major factor in keeping rock blasting ... Blasting vibrations and air blast concerns may have a ...

Detonations of explosive material charges are a source of intense paraseismic vibrations. These vibrations can cause damage to buildings and other infrastructure in the vicinity of the works, and can be a nuisance for their inhabitants. The article presents the problem of paraseismic vibration analysis, as induced by blasting works carried out in open-cast mines, using various methods of time ...

In open cast coal mines, subdrill is known to damage coal seams, therefore blast holes are either drilled to terminate above the coal seam or are backfilled, resulting in negative subdrill (Jimeno, Jimeno, & Carcedo, 1995). In metalliferous mining operations, most production blasting …

6. Use of suitable delay and burden for heavy blasting to reduce impulse noise. Vibration due to Blasting: Less than 25 per cent of the explosive energy was utilised in rock breaking during opencast mining while the rest was converted into shock waves traveling through air or ground, causing noise, flying of rocks or vibration of ground structures.

[3] Kahriman, A. "Analysis of ground vibrations caused by bench blasting at can open-pit lignite mine in Turkey." Environmental Geology 41.6 (2002): 653-661. [4] Ak, Hakan, et al. "Evaluation of ground vibration effect of blasting operations in a magnesite mine." Soil Dynamics and Earthquake Engineering 29.4 (2009): 669-676.

during processes of mining, loading and transporting of aggregate. The need of more precise determination of acoustic energy sources was prompted by the studies Πper-formed by the authors Πon limiting the noise level caused in open cast mining by blasting works [5] and on assessment of occupational risks at work stations in such mines [4]. 2.

the flyrock, noise and vibration generated during blasting with NONEL are found to be minimal as compared to the safety fuse and the electrical methods. It is also observed that NONEL initiation increases blasting efficiency and also optimize the cost of blasting. Keywords: NONEL, Booster, Blast Hole Drilling, Mine PNR Mines, ANFO, – Detonators

Open cast mining is a surface mining technique of extracting rock or minerals from the earth by their removal from an open pit or borrow pit. Walls of the pit are generally blast mined, creating ground vibrations and resulting in dust generation and water, air, and noise pollution.

The radial crack in rock caused by tangential tensile stress is the main cause of rock blasting damage; ... "Research on effects of blast casting vibration and vibration absorption of presplitting blasting in open cast mine," Shock and Vibration, vol. 2016, Article ID 4091732, 9 pages, 2016.

Study of impact of ground vibrations caused due to blasting in stone quarry on surrounding village structures. Sr. Geologist, Department of Mines, & Geology, Udupi District. Prof. V. R. Sastry. 16. 14618. Study of the impact of ground vibration caused due to blasting in stone quarry on nearby structures. Sri Shrisha Nayak, Kenjar, Karkala Taluk

Mining for coal with frequent blasting would disturb the ... faces an existential threat from the proposed open cast mining project proposed to ... "The vibrations caused by the blasting may ...

• Checking the Vibrations at the surface caused by underground blasting. Hence taking into consideration Minimum Vibration causing explosive into use. 5. Clearence from MoEF & SPCB • The copy of EMP of proposed project is attached and clearance lenience of previous open pit mining …

Research Article Research on Effects of Blast Casting Vibration and Vibration Absorption of Presplitting Blasting in Open Cast Mine LiMa, 1,2 KeminLi, 2 ShuangshuangXiao, 2 XiaohuaDing, 2 andSydneyChinyanta 2 State Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining and Technology,

One of the most fundamental stages in open pit mining is drilling and blasting. A good fragmentation and a minimum ground vibration are characteristics of a successful drilling and blasting operation. In this study, 78 blasting events of AlvandQoly limestone mine located in Kurdestan cement company in west of Iran were investigated. The vibrations induced blasting was recorded by …

3. Steel mine structure In late 2010, the author was asked to provide advice to a mining company which needed to extend its open cut workings very close to existing mine infrastructure, and the opportunity to directly relate ground and structure vibrations was suggested. …

2. Vibrations Blasting generated vibrations can damage underground and aboveground structures. When the Contractor is using a seismograph to monitor vibrations on State ROW, the Standard Specifications (§203-3.02.A.3.) provides the maximum particle velocity unless directed otherwise by the Engineer or the Contract Documents.

Usually used against the final or interim walls in a hard rock open cut mine. U. No item to display. V VOD (Velocity Of Detonation) The rate of detonation measured in units of speed (commonly metres per second). Vibration. The measured level of oscillation caused by a particular blasting event at a point of interest. W Waste

Open cast mine blasting endangering lives of residents. Oct 9, 2016. Oct 9, 2016. ... heavy blasting vibrations and bad traffic caused by their trucks during their blasting time which is scheduled at 5pm during week days. The blasting programme is too much to bear, I don't think they actually meet the South African standards, they had agreed ...

When priming blasting agents with holes up to 2 1/2 inches in diameter, a full cartridge of high velocity explosives like 60 percent ammonia gelatin, gels, slurries, or cast primers with a blasting cap, is a sufficient charge. For larger holes, the priming requires much more care, especially if the hole is wet or decked charges are used.

The limits for mines and quarries that commenced operation on or after 1 July 2001 are as follows: Ground vibration at sensitive sites must not exceed 5 mm/s (ppv) for 95 per cent and 10mm/s (ppv) for 100 per cent of all blasts. Airblast at sensitive sites must not exceed 115dB (Lin Peak) for 95 per cent and 120dB (Lin Peak) for 100 per cent of ...

Singh P. K. [26] and Roy [27] studied blast vibration effects in an underground mine caused by open-pit mining, ground vibration recorded at roof, pillar and floor were analyzed separately and the ...

Blasting in opencast mines is characterized by the use of large masses of explosives for a single blast. Blasting is done in a series of several to tens or even hundreds of charges placed in long holes and fired with a millisecond delay. Works are often carried out in the vicinity of buildings; therefore, reducing vibration impact is essential for opencast mines.

1. Introduction to Blast Vibration and Airblast When a blast is detonated, only a portion of the total energy is consumed in fracturing and shifting the rock. The remaining energy is dissipated in two forms: (a) as vibration, in the form of seismic waves traveling very rapidly within the ground and along the ground surface and,

Ak et al. (2009) presented and analyzed the results of ground vibration measurement induced by 43 bench blasting events at an open-pit mine consisting of older metamorphic rocks in Turkey. Badal (2010) analyzed data of blasting operations at open cast coal mines in Rairarh, Chhattisgarh, India.

Air-blast overpressure is one the harmful effects of blasting operations in open pit mine. It can cause vibration in buildings, houses, broken the glass door system and structural damage ...

Blasting Vibration Kentucky Division of Mining Reclamation and Enforcement ... venting of the expanding gas and movement of the air caused by the displaced material ... quickly. On the other hand, your house will respond noticeably longer from blasting on a surface coal mine, because greater volumes of material must be moved requiring larger

less wastage of explosive energy in blasting, less throw of materials, and reduction of blast vibration resulting in greater degrees of safety and stability to the nearby structures. Development of a Blast Optimization Model Selection of proper explosive in any blasting round is an important aspect of optimum blast design.

David Varcoe, Principal Mining Engineer of AMC Consultants notes a recent project in which AMC was involved that required, amongst other activities, a review of options to measure blast fragmentation in an operating open pit mining environment. "Blast fragmentation measurement is usually depicted," he explains, "as a particle size ...

Vibration Energy Blast vibrations travel away from a blast in all directions. At 5,000 to 25,000 feet per second, ground vibrations for all practical purposes arrive immediately at the home at the detonation of the first hole. Airblast travels much slower at 1,100 feet per second.

Answer (1 of 7): Having been worked in an open cast(OC) metal mine for 3 years, I can give some insight on the negative effects of OC mining in India at least. The first two images show how open cast and underground mining is done. Open cast mine Underground mine * It consumes a vast area un...

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 slope. Therefore, prediction of ground vibration with an appropriate degree of accuracy is important to identify safety area of blasting. In this paper, in the first step, a predictive equation based ...

• Through‑seam Blasting • Cast Blasting • Soft / Hard & Low Density • Vibration / Airblast Controls • Digital Blasting & Case Studies • Misfire & Incident Investigation • Calculating New Patterns • Deck Charging Gasbags Incidents, Issues, SHE • Mine Process Modelling – I‑mining • Reactive & Hot Ground • Rehab Blasting

The impact energy produced by blast casting is able to break and cast rocks, yet the strong vibration effects caused at the same time would threaten the safety of mines. Based on the theory of Janbu's Limit Equilibrium Method (LEM), pseudo-static method has been incorporated to analyze the influence of dynamic loads of blasting on slope stability.

Blasting is a primary means of extracting minerals and ores at surface mining operations. The domestic consumption of explosives and blasting agents during the year 2002 was about 5.53 billion pounds. Flyrock is always a major concern for the blaster. Flyrock from surface blasting operations has caused