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MAXAM Foundation

MAXAM Foundation - MAXAM Chair - Blasting solutions - Stone quarries

Aggregate has an innumerable number of uses in modern society. This inert granular material, consisting of rock fragments (sands between 63 μm and 2 mm, or gravels of over 2 mm), can be found in a wide range of uses in both construction (building and infrastructure) and processes in the chemical and pharmaceutical industries, among others.

Aggregate is the most important raw material used by man after water. Over recent years demand for aggregate has increased due to growth in the building industry.

Stone quarries

Aggregate is generally mined in open-pit stone or gravel quarries. Mines and their form of operation are conceived and designed depending on whether they are to extract rock mass or unconsolidated material, and whether dry or wet techniques will be used. The most common type of stone mining is an open-pit quarry. The mining process starts with controlled, safe use of energy products in controlled blasts. The aim of this initial stage is to break up the rock into a specific size and distribution to make it easier to transport and crush, always ensuring total safety and eliminating any environmental effects. The material is then loaded and taken to treatment plants. Here it passes through several stages to reduce its size using equipment such as jaw, impact, rotary and cone crushers.

Once crushed, the outgoing material is distributed by size using sieves and classifying equipment in order to ensure it meets the particle size specifications of the product to be marketed. With regards to size, aggregates are classified by the particle size fraction d/D, where (d) is the lower size and (D) the upper size, e.g. 6/12 mm.

 Results of a blast in a Stone quarry in Australia.

MAXAM and stone quarries

As in many mining processes, aggregate is generally extracted in stone quarries using drilling and blasting techniques, commonly using a multiple bench system. Blasting is a key part of aggregate operations, since 100% of the blasted material is potentially marketable. As a result, excellent control over the fragmentation generated in the blast is required, especially when producing fine materials and oversizes. In this regard, MAXAM's drilling and blasting solutions help ensure optimal results which minimize energy consumption and any possible environmental effects.
A mix of services and products to size, measure, predict and control all the parameters in a blast, in order to reduce both fine materials and oversizes as much as possible. To this end, special blasting techniques are required to size the distribution of the energy provided by the explosive products in the rock mass, in order to ensure a fragmentation particle size curve which is optimized for subsequent operations.

Given these challenges, the value propositions developed byMAXAM include:

• Safe operation.
• Complete line of packaged and bulk products.
• Control vibrations and wave area.
• Control projections.
• Control fragmentation.
• Reduce oversizes,minimize secondary blasting.
• Reduce fine material.
• 100% thru crusher service
• Reduced Total Cost of Ownership (TCO).

The combination of all these factors is key to the success of stone quarry operations.

Be sure to contact MAXAM for further information on value proposals and blasting solutions for stone quarries.

Results of a blast in a Stone quarry in Australia.

Blasting solutions. October 2017


Last update 2020.09.21
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