Determining Method of Backfill Strength Based on Damage Constitutive Model
Authors
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College of Resources & Civil Engineering, Northeastern University, Shenyang 110 819 ,CN
Qiu Jingping -
College of Resources & Civil Engineering, Northeastern University, Shenyang 110 819 ,CNYang Lei
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College of Resources & Civil Engineering, Northeastern University, Shenyang 110 819 ,CNXin Jun
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College of Resources & Civil Engineering, Northeastern University, Shenyang 110 819 ,CNSun Xiaogang
Keywords:
No Keywords.Abstract
Backfill strength and ratio determining is one of the key for the stage of open stoping with subsequent filling mining method. Since some problems occur when adopting traditional method to determine filling strength, it is necessary to explore a more scientific approach to study reasonable match between backfill strength and rock mass. ZhongGuan iron mine’s backfill were subjected to laboratory mechanics test, and their stress-strain curves were obtained, backfill's damage constitutive models before peak stress were established by using damage mechanics. According to the principle that the peak deformation energy of backfill should be corresponded to releasing energy from excavated rock mass, the optimum backfill strength and ratio of ZhongGuan iron mine were determined, which plays a significant role in fill mining production on site.
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