Audits, engineering and consulting

Ventilation studies – Mines and underground quarries

The Aeration Title of the RGIE applies to all underground works in mines and quarries and makes it compulsory to draw up a Ventilation Technical File, which gathers the technical studies justifying the measures taken to ensure the aeration of the operation.

Accessible work must be ventilated to :

– Ensure the health of the atmosphere;

– Avoid any accumulation of dangerous gases;

– Ensure acceptable working conditions.

Your ventilation technical file must include the following

  • Study of the main aeration (short, medium and long term)
  • Study of the secondary ventilation
  • Incidents :
    • Stopping of the motorcycle ventilation/ motor fan (calculation of residual air flows underground)
    • Destruction of an air brake
    • Deactivation of the secondary ventilation
    • Calculations in case of extreme weather with or without motorcycle ventilation /motor fan
    • Study on consequences of fires in the ventilation system
    • Study of the safety of the personnel and of the evacuation routes

AVEC Ingénieurie supports you in the creation and the maintenance of this Ventilation Technical File.

Our AERO software

Modelling in mesh networks made possible by the Aéro© suite.

Audits, engineering and consulting

AERO suite are software of calculation in mesh network developed by AVEC Ingénierie, and based on the HARDY-CROSS® method. It determines the distribution of air flows and load losses in the system, calculates the operating point of the fans and takes into account the effects of natural ventilation.

Accepted & modelled constraints:

  • Presence of fire(s) according to established scenarios
  • Gas and fume production and propagation per unit time

Aeraulic modelling of mesh networks, a unique competence, inherited from the Charbonnages de France

Audits, engineering and consulting

Our objectives

  • Know how your mine or underground quarry ventilation works;
  • Anticipate disasters (fires, collapses) to set up fallback paths;
  • Simulate the progress of the operation at 2, 5 10 or even 50 years;
  • Optimize your facilities by simulating scenarios (Energy and economic optimizations);
  • Compare regular measurements to the numerical model to detect drifts;
  • Design new ventilation and/or air conditioning systems;
  • Simulate the impact of natural ventilation

Ventilation studies – Civil works / Construction

The INRS, the CRAM/ CRAMIF/ CRAMTS, the CARSAT and the AFTES have published several recommendations constituting the code of practice in the fight against atmospheric pollution in underground work and under-pinning, currently used as references:

ED695: General principle of ventilation (principe(S))

ED703: Confined space ventilation

R.494: Implementation of ventilation devices in linear underground works

PS 1194: Guide to good practices in underground work

GT27R1F1: Ventilation of underground works under construction

These documents apply, among other things, the rules defined by the Labour Code and the RGIE.



AVEC Ingénierie carries out a complete ventilation study of your worksite including:

– Legal bases (VME/VLE)

– Analysis of the project and the problem

– Analysis of Work Plans

– Planning analysis according to phasing

– Technical Visit

– Determination of pollutant characteristics and sources

– Dimensions of air flows

– Determination of ventilation concept

– Writing of execution and assembly plans according to progress.

– Sizing of equipment to be implemented

– Determination of the concept of regulatory control

– Provision of calculation notes and detailed report

– Provision of site ventilation diagram

Our experts can accompany you during technical meetings internal to your company or in the presence of Occupational Safety and health organizations.