Access Road at the Top of the Pressure Change Law of Pillarless Sublevel Caving of PFC2D Simulations

ZHOU Hang; HOU Kepeng; LIANG Wei

doi:10.13779/j.cnki.issn1001-0076.2017.02.005

2017 Vol. 37, No. 2

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ZHOU Hang, HOU Kepeng, LIANG Wei. Access Road at the Top of the Pressure Change Law of Pillarless Sublevel Caving of PFC2D Simulations[J]. Conservation and Utilization of Mineral Resources, 2017, 37(2): 25-29. doi: 10.13779/j.cnki.issn1001-0076.2017.02.005

Citation:

ZHOU Hang, HOU Kepeng, LIANG Wei. Access Road at the Top of the Pressure Change Law of Pillarless Sublevel Caving of PFC2D Simulations[J]. Conservation and Utilization of Mineral Resources, 2017, 37(2): 25-29. doi: 10.13779/j.cnki.issn1001-0076.2017.02.005

Access Road at the Top of the Pressure Change Law of Pillarless Sublevel Caving of PFC2D Simulations

Publish Date: 25 April 2017

Abstract

Abstract

Sublevel pillarless caving as the research object,using particle flow numerical simulation software PFC2D study a large amount of ore drawing tope bottom and sidewall dynamic pressure change rule,and by two different stoping sequence of ore drawing simulated analysis the change of the pressure reducing area and higher pressure area.The results showed that: with the ore drawing to the wall pressure peak value increases gradually,at the top of the pressure to reduce the scope as the working face advancing gradually decreases,and until it disappeared.Two wings to the middle of the bottom of the stope will produce stress concentration,the stope bottom pressure will be greater than the wing to another wing of extraction.

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