EN 791:1995+A1:2009

Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 List of hazards
5 Safety requirements and measures
   5.1 General safety requirements
        5.1.1 Intended use of the drill rig
        5.1.2 Ergonomics
        5.1.3 Hot and cold surfaces and sharp edges
        5.1.4 Ventilating ports
        5.1.5 Hoses, pipes and fittings under pressure
        5.1.6 Materials
        5.1.7 Handling of the drill rig and its parts
        5.1.8 Access to operating positions and
               servicing points
        5.1.9 Isolation of energy sources
   5.2 Driving, tramming and operating position
        5.2.1 General
        5.2.2 Operator's position
        5.2.3 Underground drill rigs
        5.2.4 Visibility
   5.3 Controls, functions, systems
        5.3.1 General
        5.3.2 Starting
        5.3.3 Stopping
        5.3.4 Failure of the power supply
        5.3.5 Failure in a control circuit
   5.4 Control devices
        5.4.1 General
        5.4.2 Emergency stop and safety devices
        5.4.3 Verification
   5.5 Stability
        5.5.1 General stability criteria
        5.5.2 Definitions for stability calculations
        5.5.3 Verification of stability
        5.5.4 Ground pressure, calculation for crawler
               mounted drill rigs
   5.6 Carrier brakes
        5.6.1 General
        5.6.2 General requirements for wheel mounted
               drill rigs
        5.6.3 Service braking system for wheel mounted
               drill rigs
        5.6.4 Secondary braking system for wheel mounted
               drill rigs
        5.6.5 Parking braking system for wheel and crawler
               mounted drill rigs
        5.6.6 The service, secondary and parking braking
               systems on crawler mounted drill rigs
        5.6.7 Braking systems for 'skid steer' wheel mounted
               drill rigs
        5.6.8 Verification
   5.7 Protection against moving parts
        5.7.1 General
        5.7.2 Transmission parts
        5.7.3 Moving parts involved in the working process
   5.8 Electrical installations
        5.8.1 Electric power installation
        5.8.2 Battery installation
   5.9 Hydraulic installations
   5.10 Pneumatic installations
   5.11 Lighting
        5.11.1 Working light
        5.11.2 Illumination when tramming
   5.12 Fire protection
        5.12.1 General
        5.12.2 Fire extinguishers
        5.12.3 Installation of fire extinguishers
   5.13 Noise and vibration
        5.13.1 General
        5.13.2 Noise
        5.13.3 Vibration
   5.14 Dust and gases
        5.14.1 Dust suppression
        5.14.2 Engines and engine exhausts
   5.15 Draw-works, winches and ropes
        5.15.1 General
        5.15.2 Safety requirements
        5.15.3 Winches for operating a drill rig
               on slopes
   5.16 Roller and leaf chains
   5.17 Masts, derricks, feed beams and working platforms
        5.17.1 General
        5.17.2 Racking and working platforms
        5.17.3 Personnel lift for operational work
        5.17.4 Movable platforms for service, maintenance
               and repair
        5.17.5 Access
        5.17.6 Escape systems
   5.18 Special requirements for remotely controlled
        and automated drill rigs
        5.18.1 Operating position
        5.18.2 Emergency stop
        5.18.3 Control system
        5.18.4 Fire protection
   5.19 Warning devices
6 Verification of safety requirements/measures
7 Instructions for use - Instruction handbooks
   7.1 Marking - Data plate
   7.2 Indicators
        7.2.1 Information indicators
        7.2.2 Warning signs for residual hazards
   7.3 Maintenance
   7.4 Instruction handbooks for drill rigs
        7.4.1 General
        7.4.2 Operator's instructions
        7.4.3 Special safety instructions in the
               operator's instructions
        7.4.4 Maintenance instructions
        7.4.5 Special safety instructions in the
               maintenance instruction
        7.4.6 Spare parts list
Annex A (normative) - Measurement of noise and vibration
Annex B (normative) - Instructions for the examination and
                      checking of blocks, wire ropes and chains
Annex C (normative) - Brake test for drill rigs excluding
                      truck and tractor mounted drill rigs
Annex D (normative) - Hazards related to operation modes
                      of drill rigs
Annex E (informative) - Symbols and signs
Annex F - Bibliography
Annex ZA (informative) - Relationship between this European
                         Standard and the Essential
                         Requirements of EU Directive
                         98/37/EC, amended by 98/79/EC
Annex ZB (informative) - Relationship between this European
                         Standard and the Essential
                         Requirements of EU Directive
                         2006/42/EC

1.1The general term "Drill Rig" covers several differing types of machines for use in the construction industry, water well drilling industry, mining and quarrying, for use above ground as well as underground and for tunnel construction. The differing tasks determine the choice of drilling method and type of machine. For this reason there are many possible ways to separate drill rigs into different groups, e.g. in accordance with:-The task; -The drilling method used;-The cutting removal method;-The type of construction work.The methods used for drilling can be basically differentiated in percussive and rotary drilling principles.Percussive drilling is a method by which the hole is produced by crushing the ground or rock at the bottom of the drill-hole by striking it with the drilling tool and removing the cuttings out of the bore-hole.Rotary drilling is a method in which the drilling tool at the bottom of the borehole is rotated and at the same time, a feed force is applied by a feed system or drill collar. The ground or rock at the bottom of the borehole is crushed or cut by pressure, shear or tensile stress produced by the different drilling tools. The cuttings are periodically or continuously removed out of the bore hole.Rotary percussive drilling is performed by a piston striking directly on the bit (down the hole hammer drills) or by percussive energy transmitted via a drill string to the bit. The piston is powered by either hydraulic fluid or compressed air.At the same time the drill bit is rotated either continuously or intermittently.The cuttings are continuously removed out of the borehole by a flushing medium, air or fluid which is carried to the drilling tool.Typical examples of drill rigs covered by this standard are:-Cable tool drill rig;-Pile drill rigs;-Pile top drill rig;-Raise borer;-Reverse circulation drill rig;-Rotary and percussive drill rig for underground drilling;-Rotary and percussive drill rig