Home > Encyclopedia

Equipment selection for production of aggregate

Production of aggregate of acceptable quality, at the required rate of production and at economic cost, depends on the selection and utilization of the most suitable equipment to match the conditions. Achieving these objectives is a crucial task of the quarry engineer and also requires careful planning and scheduling of operations. Each phase of the extraction plan will be presented in a series of mine plans and schedules showing the progressive extraction of the payrock minerals and, in most cases, the designed backfill and restoration as well. In the same way the type and numbers of mobile equipment will need to be programmed and scheduled. Planning for equipment replacement is largely a question of the investment policies dependent on the capital depreciation set by the operating  company.

However, during the life of a quarry or pit the rate of output, the ratios of waste to payrock and the dimensions of production faces are all likely to vary and consequently the type, numbers and capacity of all excavation equipment will need to be adjusted to suit the particular requirements.

The optimum number of each machine and their deployment can be determined by consideration of the required rate of production, the geological conditions and performance data for a single unit obtained from comparative experience or the manufacturer.

Drilling equipment

Selection of the drilling equipment and method takes into account a number of factors which may vary within a single quarry and will almost certainly vary during the life of a quarry. The rock type and rock mass classification will influence the performance of any drill rig in terms of rates of penetration and wear on rods and bits. Typically a DTH rotary percussion rig will achieve 20m/h in a soft limestone but only 10-12m/h in a hard igneous rock or a sandstone. Hydraulic rig penetration rates  can vary between 15 and 25 m/h.

The selected drilling pattern of burden x spacing x face height will enable the yield per hole in cubic metres to be calculated. Based on the drill performance, after making allowances for availability and utilization, the yields per blast and the number of drills to achieve the production targets throughout the development can be determined.

Loading equipment

The principal factors which need to be considered in selecting the loading equipment and scheduling its deployment throughout the quarry or pit life are: (i) the daily and hourly production rates; (ii) the configuration of quarry faces and the number to be worked; (iii) the expected fragmentation and the maximum lump size; (iv) the capacity and type of haulage trucks; (v) the digging rates, cycle times and efficiencies of each type of  excavating machine.

As production rates vary throughout the life of a quarry as may the rock conditions, so the number and type of machine need to be scheduled to ensure cost effectiveness of the operation.

Hauling equipment

The numbers and capacity of dump trucks will generally be determined by the required production rate, but there are various factors which often influence selection. The type of excavation and ground conditions including manoeuvring space, gradients and running surfaces will decide whether  rigid or articulated dumpers are appropriate.

From the mine plan the haulage distances and cycle times can be calculated at any stage and thus indicate the numbers needed. Careful analysis of haulage costs can assist in deciding if alternative methods of moving materials from the excavations to the plant should be adopted. The alternatives might include load-hauldump using a single machine, a front end wheeled loader in the case of rock quarries, or motorized scrapers in the case of sand and gravel pits.

>>Previous: Haul roads and conveyor routes design for quarry

>>Next: Underground quarrying for production of aggregates

Get Support & Quotation

Please fill in the form below(* are required). We will get in touch with you ASAP!

Concrete Plant Concrete Mixer Crusher Other


  • Concrete Solution for AAC Block PlantConcrete Solution for AAC Block Plant

    Aerated concrete block is an important kind of construction material and it is mainly composed of cement, gravel, fly ash, lime and foaming agent. It possesses the advantages of light weight, fire prevention, thermal insulation,noise insulation...

  • Hard rock Crushing Plant, Roadstone Processing PlantHard rock Crushing Plant

    The following figure depicts the flowsheet for a plant producing various forms of dry (uncoated) roadstone including high PSV (+60) surface chippings. The produ...

  • Nuclear Power Concrete Production LineNuclear Power Concrete Production Line

    Nuclear power project is less than hydropower project in concrete pouring volume, but compared with other projects, it still needs a large volume of concrete and its structure is more complex than hydropower project....

  • Building Aggregates Manufacturing SolutionBuilding Aggregates Manufacturing Solution

    Camelway Machinery specilizes in providing professional building aggregates solution and can offer various crusher and sand maker to meet your practical demand for differen kinds of aggregate....

  • Aggregate Production,Basalt Crushing and Sand Making LineBasalt Crushing and Sand Making Production Line

    The production line of basalt materials processing can mainly be divided into 3 stages: primary crushing, secondary crushing, sand making & shaping, respectively. Because the real size of the raw basalt material and the desirable size of end product o...

Contact Us

Tel: 008637165861518

Fax: 008637165861528


Mobile: 008618838109566

WhatsApp: 008618838109566

Skype: Camelway1983