Determining method of backfill strength based on damage constitutive model

作者：Qiu Jingping; Yang Lei^*; Xin Jun; Sun Xiaogang

来源：Journal of Mines, Metals and Fuels, 2018, 66(3): 199-202.

• Damage constitutive model
• Damage mechanics
• Deformation energy
• Determining method
• Fill minings
• Mining methods
• Peak stress
• Rock mass

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.

• 出版日期2018
• 单位东北大学