Application of Non-explosive Demolition Method of Excavation Project in Hard Rock Mine

The extended digging of-344 loading chamber of return air airshaft was in hard rock formation in western prospecting well in Huibaoling iron ore the conventional blasting cannot be implemented here.Then the nonexplosive demolition method was adopted to assure the construction quality and process.The excavation area was divided into two regions and crushed in succession.In the static explosive scheme,the specific drilling number and the amount of charge were considered.After field testing,the reasonable excavation scheme of non-explosive demolition method was determined and good result was obtained.