Cast Blasting Beijing May 25, 2012 Shenhua, the largest coal - PowerPoint PPT Presentation

Zhunger Heidaigou Mine Cast Blasting Beijing May 25, 2012

• Shenhua, the largest coal producer in China • Zhunger is the largest open pit mine in China • Located in Erdos, Inner Mongolia • 15 mil tpa open pit mine • Introduced the first Dragline • Target to achieve 20 mil tpa • Orica helped with the cast coal production with blasting technology introduction of the dragline • Build the bulk explosives plant • Introduced mobile explosives manufacturing technology

Introduction • 2005 2007

Project Introduction What our Customers want transition from standard stand up blasting to cast blasting Improve the dragline efficiency through cast blasting increase the coal output to 20 mil tpa reduce the mining cost through better blasting performance (fragmentation, powder factor) Improve the mining safety through better application of the explosives, eliminating the misfires, fly rocks, vibration, fumes

Project Challenges

Jointing

Project Introduction What Orica has done Helped with the introduction of the cast blasting technology, transitioning from standard 15 m bench to 45 m high bench Introduced the bulk explosives technology, built a modern bulk explosives plant, better explosives products Introduced the mobile explosives manufacturing trucks provided high quality detonators to improve the blasting performance, eliminating the misfires, reduce the vibration blasting software to help optimisation of the blasting design

Cast Blasting • The controlled placement of overburden by drilling and blasting to achieve the minimum overall overburden removal cost • Blasting can move + 30% of overburden into final position in 10 secs and requires little capital. • The remaining 70% takes weeks to move using considerable capital and labor • Blasting also affects this 70% by determining muckpile shape, diggability and bucket fill factors • Orica has technology such as blast modelling to produce the right results based on site requirements

Stand-up vs Cast Blasts B last profile Traditional Blast R eh an dle line • Multiple passes for large benches S p o il S ta nda rd blast • Single type of explosive used In final lo ca tion • Very little throw No reha ndle Coal • Lots of post-blast muckpile shaping required • 15 m high bench Throw blast Cast Blast • Multiple explosive products used S poil • > 30% throw No rehandle • Greatly reduced rehandle Coal • Less post-blast muckpile shaping required • 45 m high bench

• Before the blast

• Cast Blast

The First Blast – Pre-blast

The First Blast – Pre-blast

The First Blast – Pre-blast

Pre and Post Blast

Post Blast

Results Orica Mining Services 澳瑞凯采矿服务

A journey… • Heidaigou mine reaches 30 mil tpa capacity • Annual savings in ~ $100 mil • • Cast blasting technology written into Chinese mining test books • Much reduced vibration • Single blast 2 mil BCM every 3 weeks • Electronic blasting in 2010 2007 Now

Orica Mining Services Our role is 澳瑞凯采矿服务 to use energy to consistently convert rock mass into broken rock at the right time and to the right requirements for the next stages Power in Partnership • Safer mining operations • Higher productivity • Lower mining cost • Sustainable development

How Technology helps our Customers Assist our Customers to meet their targets via increased productivity Improved coal recovery is the big win Decreasing the Reducing coal loss / number of drill and increasing coal recovery blast cycles required to recover the same amount of coal Improved throw blasting Improved outcomes, reducing fragmentation to dragline electricity improve downstream consumption per tonne of operations coal produced Improved ‘diggability’, yielding a significant increase in coal exposure rate, also reducing environmental emissions from the mining process

Thank you 谢 谢！ Victor Xie, GM, OMS China James Wen, Marketing Manager Mob: 159 6559 389