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Unconventional blasting technology in open-pit mines under special conditions and its application

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  • Yunnan Gold Mining Group Co.,Ltd.|Yunnan Gold Mining Group Co.,Ltd.|Heqing Beiya Mining Co.,Ltd.|Heqing Beiya Mining Co.,Ltd.|Heqing Beiya Mining Co.,Ltd.|Heqing Beiya Mining Co.,Ltd.|Yunnan Gold Mining Group Co.,Ltd.
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Abstract:

Due to special conditions in the local region of an open-pit stope,mining and stripping operation can not be carried out with conventional blasting methods.In order to ensure the continuity of the mining and stripping operation in the open stope,the mechanical and physical-chemical rock breaking methods,such as hydraulic splitter+hydraulic hammer,open-pit stopper,eagle beak shaped excavator and static swelling agent,liquid state inert gas phase change cracking technology,are selected through the reference,analysis and comparison of the unconventional blasting methods of various mines at home and abroad.The advantages and disadvantages of all kinds of rock breaking methods are introduced in detail,and the actual economy and explosive blasting methods are compared.Based on the economic screening in the early stage and the experimental results in the later stage,as well as the actual site lithology,3 rock breaking methods including hydraulic splitter+hydraulic hammer,eagle beak shaped excavator and static swelling agent can be combined in an effective way.This kind of method can guarantee the safety of mining and stripping operation under special conditions and ensure the continuity of open-pit stope operation.

Keywords:

open-pit mining;unconventional blasting;mechanical rock breaking;physical-chemical rock breaking;safe production