Method for demolishing surface mine underground reinforced concrete constructional work by blasting

• Main Authors: WANG ZHIZHONG, MU WENFEI, XU LIANSHENG, ZHANG BAOCAI
• Format: Patent
• Language: Chinese; English
• Published: 22.08.2012
• Subjects: AMMUNITION; BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

The invention relates to a method for demolishing a reinforced concrete constructional work by blasting, in particular to a method for demolishing a surface mine underground reinforced concrete constructional work by blasting. The method is characterized in that: the interior structure of the constructional work is demolished by blasting layer by layer from the bottom to the top and finally a single-blast method is adopted. The blasting sequence is as follows: blasting the free seams of shear walls in the bottommost layer; blasting the bottoms of ore storage bins and third layer bottom plates; blasting the platforms of the ore storage bins and second layer bottom plates; blasting first layer bottom plates; blasting first layer top plates and beams; blasting dump dead walls above earth surface; and blasting shear walls around broken well underground chambers. The method ensures the high efficiency and safety of blasting steps, greatly shortens blasting period, easy realizes the signal-blast demolishment of the