Assessment of noise and ground vibration induced during blasting operations in an open pit mine — A case study on Ewekoro limestone quarry, Nigeria ... (usually b= .6). R is the R distance from the charge in m and 50 is defined as Q a scale distance. ... 2005(23): 24962. Griffiths M J, Oatfs J A H, Loard P. The propagation of …

The roles of the blast charger and approved handler in charge of the blast should be appointed by the mine operator. 6.3.1 INDIvIDUAL bLAST rISK ASSeSSmeNT A formal risk assessment should be completed for each blast, identifying the hazards and controls at each stage, including the extent of the blast exclusion zone during the firing sequence.

This study evaluates the impacts resulting from quarry-blasting operation on nearby buildings and structures as it generates ground vibration, air blast, and fly rocks. In this paper, first blasting operation and its possible environmental effects are defined. Then the methods of blast-vibration prediction and commonly accepted criteria to …

Application of artificial intelligence techniques for predicting the flyrock distance caused by blasting operation. Arabian Journal of Geosciences, 7(1), pp. 193-202. Ghasemi, E., Sari, M. & Ataei, M., 2012. Development of an empirical model for …

About this four-part series. In 1963, Pit & Quarry published a series of articles on the mechanics of blasting authored by Richard Ash, a longtime professor of mining engineering at the School of Mines & …

• The minimum distance for personnel is 500 feet. • Safe distances will be determined based on conditions for each blast by the Blasting Foreman or designee. Blasting Blocker or Guard Persons assigned to block the entry of vehicles and persons to the blasting area during detonation and subsequent inspection until the reentry to the …

The peak particle velocity datasets recorded during quarry blasts in the neighborhood villages and towns in Ibadan and Abeokuta were processed and analyzed in order to recommend a safe blast ...

During quarry operations, the process of blasting entails the systematic drilling of many rows of blast holes, each following to certain requirements for stemming, spacing, burden, sub-drill, face ...

It is the distance by which the face of tunnel is progressed and may be described as distance per blast or distance per unit time (shift, day, week, or month). ... Modern blasting relies on detonators for the safe and precise control of explosive energy release to achieve desired blast outcomes. Detonator, Electric ... Refer to open cut mine. T ...

Using cones or berms, demarcate the blast site (the area where holes are loaded or in the process of being loaded). Within the blast site, have only the personnel and equipment necessary to load the blast. Complete drilling prior to commencement of loading, or have the drill at a distance where it cannot possibly intersect a loaded hole.

Blasting should also be viewed in the local sense. No other quarry operation has more capacity to cause community dissent than blasting. The blasts must be shot in a safe manner, with the area …

500-metre setback and offsite minimum separation distance of 1,000 metres from ... (Nwachulwu, 2000).11 Quarry is a type of open-pit mining from which rock or minerals are extracted, quarries are generally used for the ... Blasting Quarry Operations: Adverse and Cumulative Effects, Lawsuits and Complaints, and Suggested Remedies ...

This document contains an Approved Code of Practice and other supporting guidance on the duties in the Quarries Regulations 1999. The Regulations aim to protect those working at a quarry and others who may be affected by quarrying activities, eg those living, passing or working nearby, or visitors to the site.

At present, the safe distance for stone quarries in Kerala is 50 metres from residential buildings. While quarry owners claim that this distance is more than sufficient to ensure safe mining ...

Determination of Safe Distance While Blasting at Open Pit Mine Zabrdica, Valjevo Download book PDF. Slobodan ... Quarry Slope Stability Assessment Methods with Blast Induced Effect Monitoring in Akoko Edo, Nigeria Article 14 March 2023. Microzonation map of the Abbottabad basin and immediate surroundings ...

: Ground vibration is a significant factor to be considered for safe blasting operation. Ground vibration can damage the structures situated near blasting sites. It can be controlled by adopting proper blast designing techniques. The scope of this study is to control ground vibration by identifying safe blasting parameters for quarry safety …

A drill and blast procedure are required when blasting is to be carried out within 500 m to ensure drilling and blasting is executed as designed. A sketch plan is also required to indicate the distance from …

on Blasting Quarry at PT Vale Indonesia, Sorowako, Luwu . ... The new safe distance of 500 meters, ... Keeping the lid on flyrock in open-pit blasting. Jan 1981; 23; Lunborg; Show more.

or nine out of ten blasts, and an overall limit of 10mm/s, regardless of frequency. It also restricts blasting to times between 9:00am and 3:00pm despite most authorities allowi. ell outside these hours (typically between 6:00am and 6:00pm). Local Council LawsAs det.

About this guide. This document provides useful information on some of the common health and safety issues in quarries. It will help you to manage these issues, and ensure the health and safety of everyone on the worksite. It is based on the Good Practice Guideline Health and Safety at Opencast Mines, Alluvial Mines and Quarries.

Data collection at PT. Vale Indonesia uses Leica GS and GoPro with an analysis method using Tracker 5.1.5 to observe blasting activities. The estimated maximum flyrock trajectory distance is determined using empirical and dimensional analysis methods. It is done to obtain accurate and precise results on the conditions of the blasting sites.

Table 1 - Evacuation Distance in Feet The applicable leak or rupture condition is that of a sustained trench fire fueled by non-toxic natural gas escaping from two full bore pipe ends. Blast overpressure is not addressed. The distances shown in Table 1 are intended to provide protection from burn injury and correspond to a thermal heat flux

Blasting can also be disruptive to the continuous operation of a site since personnel are required to be removed from the immediate blasting area in order for safe detonation to proceed. Hence, it is only when the immediate geological conditions render alternative extraction techniques either impossible or uneconomical that blasting is ...

Quarry engineers could safely apply the guidance and improve the positioning of the controllable boundary. The algorithm can work out the fly rock distance for either a collar, or from the free face. Depending on the unique blast design, this information can calculate maximum fly rock distances using data entry of blast properties, including

Environ Geol (2008) 54:737–743 DOI 10.1007/s00254-007-0859-7 ORIGNAL ARTICLE The analysis of ground vibrations induced by bench blasting at Akyol quarry and practical blasting charts Umit Ozer Æ Ali Kahriman Æ Mehmet Aksoy Æ Deniz Adiguzel Æ Abdulkadir Karadogan Received: 20 February 2007 / Accepted: 24 May 2007 / …

Such occurrences demonstrate incorrect determination of the bounds of the blast area. Flyrock from a limestone quarry traveled about 930 ft and fatally injured a resident who was mowing grass on his property [MSHA 1990b]. ... determining the safe distance rests on the qualified person, who in most cases is the blaster. ...

or quarry site the potential hazards are increased by the need to handle sensitive ... "Blast Guarding in an Open Cut Mining Environment ... 1.4 This code does not cover the management of hot and/or reactive ground, other than to the extent that general safe blasting practices must be observed for blasts. Specific

An area of potential instability on the quarry face identified during a routine inspection. The blast site (up until the 'all clear' is sounded) A rock pile where unfired explosive has been identified.

Open Pit or Surface Blasting. ... and using remote detonation systems to keep workers at a safe distance. Blasting in Mining and Quarrying FAQs What is quarry blasting? Quarry blasting is the controlled use of explosives to break rock into smaller, manageable pieces for extraction and processing in quarries. This technique is essential …

The safe PPV levels recommended by Bureau of Indian Standards (IS 6922, 1973) are 50 mm/s for structures located on soil sites and 70 mm/s for hard rock sites.Further, the dam is located on hard rock formations and the quality of concrete/masonry used in an engineered structure like a dam is, in reality, superior to …