Prediction of Blast-Induced Ground Vibration at a …

Thus, the predictive capacities of three artificial intelligence algorithms, backpropagation neural network (BPNN), ELM, and GPR, are investigated in this study using blasting data from a quarry (Ras …

(PDF) The effect of blast hole stemming length to rockpile

The present paper highlights some important fragmentation issues experienced in the limestone quarry blast rounds. In light of these major issues, the paper outlines influence of a few important design parameters, which bear merit to alter the blast performance in order to duly resolve the issues in field scale blast rounds.

Investigation of Some Blast Design and Evaluation …

This point is explained by visualizing some field-scale post-blast images (Figs 10-14) on a limestone bench in a quarry where Fig. 10 reveals poorly broken and displaced muck pile fired on diagonal pattern, and, Figs. 11 & 12 illustrate the well displaced and fragmented muck pile fired on straight V-type firing pattern on the same limestone bench.

Quarry blasts assessment and their environmental impacts …

From the vibration records in terms of PPV, air blast and SD at the SUMED area due to the blasting activities at the National Cement Quarry, the maximum allowable charge per delay without any environmental effect is 591 kg for a safe distance of 650 m (the minimum distance between the quarry blasts and the two pipelines). Those values …

Delaware City Council: Quarry officials describe blasting …

For decades, Mapes said, National has used a blend of fuel oil and ammonium nitrate to blast loose the limestone the quarry produces. The mixture is easier to control than traditional dynamite, he ...

Determination of blast-induced ground vibration equations for …

Kahriman (2004) analyzed vibration components for 73 blast events at a limestone quarry located in Istanbul, Turkey. An empirical relation between PPV and scaled distance was developed by Kahriman et al. (2006) based on measurement of vibration caused by bench blasting in an open-pit mine in Turkey.

A Day in the Life: What Goes On at a Quarry

The limestone production process can fundamentally be broken down into two generalized phases: quarrying, and processing. Limestone Quarrying. The quarrying process is also known as "extraction." This …

Bill capping house-rattling blast mining levels gets a …

Limestone from rock quarries is used in virtually every construction project in Florida, which consumes more than 130 million tons of the material yearly, according to Ananth …

Poor fragmentation results in a limestone quarry (row- to

This point is explained by visualizing some field-scale post-blast images (Figs 10-14) on a limestone bench in a quarry where Fig. 10 reveals poorly broken and displaced muck pile fired on ...

10 killed in blast at limestone quarry in Andhra Pradesh's …

Smoke billowing out from the blast site at a limestone quarry at Mamillapalle village of Kalasapadu mandal in Kadapa district on Saturday, May 8, 2021

Quarreling over the quarry: Neighbors say blast shook their …

The battle is heating up between a Humboldt County rock quarry and the people living nearby.The new owner of the Rutland Quarry plans to restart limestone mining. The first blast from the new ...

Blasting mechanics: Material properties and powder factor

Assuming a small range of powder factor of ±0.05 pounds/cu. yd. could readily help a blaster or engineer design a blast, no such range exists for rock types such as limestone, sandstones, granites and others.

Bill capping house-rattling blast mining levels gets a …

We believe that the limestone quarry blasting limits in the state are generally fine," he said. "However, in situations where we are about 1,000 yards from a residential community, where the ...

Production

The whole process of making any type of lime all begins at the limestone quarry after careful surveys. Most limestone is extracted through blasting. Behind the rock face, …

Fragmentation assessment and design of blast pattern at …

Introduction. Goltas limestone is used in cement production. The design of blast pattern at Goltas limestone quarry is given in two steps. Firstly, the prediction of mean fragment size from Kuznetsov's equation [1] S 50 = A q-0. 8 Qe 1 / 6 (115 / E) 19 / 30 In Eq. (1), A—rock factor, S 50 —mean fragment size (cm), E—relative weight strength …

Environmental impacts of blast-induced acceleration on …

The main objective of this study is to evaluate the influence of blast-induced acceleration on the stability of slopes at Arakli-Tasonu limestone quarry where a planar shear failure has recently ...

Quarry | Rock Extraction, Blasting & Crushing

Sand, gravel, and crushed rock quarries employ standard surface-mining techniques. Crushed stone is used for concrete aggregate, for road building, and, in the case of limestone, as flux in blast furnaces …

Miami-Dade rock miners continue to blast away …

Quarries are permitted to blast Monday through Friday from 8 a.m. to 5 p.m. "Each blast may be up to 0.5 PPV, peak particle …

Optimization of blasting design in open pit limestone mines …

The quarry is having vertical blast holes with 76 mm diameter in all the benches. The average depth of blast holes are 13.5 m in length with a 1 m sub-drilling and 3.5 m of stemming. Ammonium nitrate and Fuel Oil (ANFO) and emulsion explosive were used in blasting operations to blast the limestone. Non-electric system (detonating …

P&Q University Lesson 4: Drilling & Blasting

[PDF] Blast optimisation at limestone quarry operations – …

Apart from budget and management restrictions, quarry blasters and engineers must face a very delicate economical equilibrium between achieving maximum fragmentation at the blast while minimizing the fines portion. The definition of fines varies from industry to industry from few inches to less than an inch, but in all cases implies a loss of mineral …

Effect of Type of Explosive and Blast Hole Diameter on

In the present paper, we investigate the blast induced ground motion recorded at the limestone quarry "Suva Vrela" near Kosjerić, which is located in the western part of Serbia.

Limestone Quarrying and Processing: A Life-Cycle …

Figure 1. Process flow diagram for limestone quarrying operations. As shown in Figure 1, the first step in quarrying is to gain access to the limestone deposit. This is achieved …

Hammerstone Infrastructure Materials

The Quarry provides a year round source of quality limestone aggregates that are essential to the growth, operational sustainability and environmental performance of the Alberta oil sands industry. With over 750 million tonnes of accessible limestone, Hammerstone Infrastructure Materials Ltd has the reserves to meet the aggregate needs …

A Pattern For Improvement | Agg-Net

Firing pattern and stemming column adjustments enhance blast performance at a limestone quarry in the Philippines By Dr Piyush Rai, reader in mining engineering; Bhanwar Singh Choudhary, senior research fellow, Department of Mining Engineering, Institute of Technology, Banaras Hindu University, India; and F.L. Imperial, president, …

Analysis of blasted rocks fragmentation using digital image …

Drilling of explosion blast holes in Pir Ali limestone quarry of Abyek Cement Plant is carried out using five drilling machines (including two semi-hydraulic, two pneumatic, and one Russell drilling machines). The benches in this mine generally have a height of 8 m, and blast holes with a diameter of 76 mm and length of 9 m are bore to …

Toeing the line: Blasting practices to control quarry floors, …

The first problem that could cause a toe or elevated floor is a hard seam (Figure 1). This can be due to a harder material such as a granite intrusion into a limestone quarry, a reduction in the amount of bedding planes or jointing in a certain region, or even the grain size of certain sandstones.

Blasting mechanics revisited: Blasting design standards

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 & Metallurgy at the University of Missouri-Rolla. The content within each article was ahead of its time, putting forth cutting-edge concepts …

Statistical modelling of the blast design parameters …

Mining and construction sites experience ecological consequences, such as ground vibrations and fly rock, owing to blasting activities. Apart from the traditional techniques, it is critical to determine the design parameters of a blast which influence the ground vibrations, created by the blasting activities, and to mitigate the effects of ground …