NoNeXPresentation

NXCO MINING TECHNOLOGIES: 

NXCO MINING TECHNOLOGIES A non-explosive rock breaking method for sensitive excavations 10 July 2004 NoneX™ TM ROCKBREAKING CARTRIDGE

OVERVIEW: 

OVERVIEW NoneX™ TM is a sensitive rockbreaking method developed for the mining and civil excavation industries by NXCO Mining Technologies. The NoneX™ TM method is a non-detonating rockbreaking cartridge which uses gas pressure to break the rock. The NoneX™ TM cartridge contains proprietary technology which enhances the transfer of energy into the rock to increase its rockbreaking effectiveness.

NoneX™ TM TECHNOLOGY: 

NoneX™ TM TECHNOLOGY The NoneX™ TM technology is based on a non-detonating compound enclosed in a cartridge, which reacts very quickly when ignited to produce high volumes of harmless gas, mainly consisting of nitrogen and carbon dioxide. When the cartridge is sealed in a drill hole, the gas pressurizes the sides of the drill hole to produce a shearing of the rock often called splitting.

SIX EASY STEPS IS ALL IT TAKES: 

SIX EASY STEPS IS ALL IT TAKES Short holes of the relevant diameter are drilled at a depth of 0.5m to 2 metres. The cartridge is placed at the bottom of the hole. Stemming is used to firmly tamp the NoneX™ TM cartridge in the hole. Once all the holes are charged, the area is cleared for a distance of at least 30m and guards are posted to prevent inadvertent access. The cartridge wires are attached to a firing cable, which is connected to the NoneX™ TM Initiator. The NoneX™ TM cartridges are fired from a safe position.

NoneX™ TM CARTRIDGE: 

NoneX™ TM CARTRIDGE

UN Classification 1.4S: 

UN Classification 1.4S The NoneX™ TM cartridge is classified as a 1.4 S product under the United Nations hazardous substances classification, in the same category as small arms ammunition. This classification is given to products that do not explode when ignited in their original packaged state. The UN 1.4S classification is defined as follows:   “Articles and substances that present no significant hazard. This division comprises articles and substances, which present only a small hazard in the event of ignition or initiation during transport. The effects are largely confined to the package and no projection of fragments of appreciable size or range is to be expected.”

CLASSIFICATION OF ENERGETIC MATERIALS: 

Energetic Materials Detonating Explosives Propellants Pyrotechnics Primary Explosives Secondary Explosives Tertiary Explosives Solid Propellants Liquid propellants Thermite Delay Compositions Igniter Compositions CLASSIFICATION OF ENERGETIC MATERIALS CLASSIFICATION OF ENERGETIC MATERIALS

NoneX™ TM vs EXPLOSIVES: 

NoneX™ TM vs EXPLOSIVES Safer storage and handling – non-explosive Low vibration levels - No detonation No shock-wave concussion effects No damage to support or infrastructure Reduced overpressure Reduced noise Low fumes and dust Localised clearance – no need for evacuation Minimal flyrock

BURNING, DEFLAGRATION & DETONATION: 

BURNING, DEFLAGRATION & DETONATION BURNING, DEFLAGRATION & DETONATION

Slide10: 

PRESSURE CURVES FOR PROPELLANTS vs EXPLOSIVES

ENVIRONMENTAL BENEFITS OF NoneX™ TM: 

ENVIRONMENTAL BENEFITS OF NoneX™ TM Low vibration damage to infrastructure Minimal vibration damage to hangingwalls & sidewalls Minimal flyrock and concussion effects Negligible noxious gasses Low levels of dust produced Local clearance instead of full mine evacuation

VIBRATION: 

VIBRATION The vibration levels produced by NoneX™ TM are particularly low when compared to explosives. This enables the method to be used in close proximity to built-up, populated areas. The method becomes particularly attractive for vibration sensitive sites where conventional blasting is prohibited or impractical. Recommendations for critical vibration levels close to structures by both the USBM and BS are similar. The USBM criteria is as follows: Frequencies above 40 Hz §         PPV < 50 mm/s – safe zone §         PPV > 50 mm/s - damage zone Frequencies below 40 Hz §         PPV < 13 mm/s – safe zone (old wooden house) §         PPV > 19.5 mm/s – safe zone (modern house) The vibrations generated by NoneX™ TM are well within imposed restrictions. Vibration levels of less than 10mm/s at 5 metres from drill hole can be achieved using a 60 gram NoneX™ TM cartridge.

DAMAGE TO TUNNELS RELATED TO SHOCK WAVE INTENSITY: 

DAMAGE TO TUNNELS RELATED TO SHOCK WAVE INTENSITY

COMPARISON OF GROUND VIBRATION LEVELS: 

COMPARISON OF GROUND VIBRATION LEVELS Peak Particle Velocity (mm/sec) 0 10 Distance from hole (metres) 10 0 80 Explosives (300g charge) NoneX™ TM (60g charge) 20 50 30 40 60 70 80 90 100 20 30 50 40 60 70 USBM 50 mm/sec PPV limit for safe rockbreaking near sensitive structures for vibration frequencies of >40 Hz USBM 13 mm/sec PPV limit for safe rockbreaking near sensitive structures for vibration frequencies of <40 Hz

NoneX™ PEAK PARTICLE VELOCITIES: 

NoneX™ PEAK PARTICLE VELOCITIES

NoneX™ GROUND VIBRATION LEVELS: 

NoneX™ GROUND VIBRATION LEVELS

PPV FOR A 60g NoneX™ CARTRIDGE: 

PPV FOR A 60g NoneX™ CARTRIDGE

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