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Impact Breakage Behavior of Stope Floor in Mined-out Space

机译：挖掘空间中Stpe地板的冲击破损行为

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To ensure the stability of floor structure and security for mining during extracting process of residual ores, it is essential to study the impact of caving ores to the floor. For this, the theory of rock micro-mechanics in combination with use of particle flow software PFC2D were applied to probe mechanical characteristics of stope floor under the impact from ore-rock bulk and dynamical response law of floor structure. The results show that the after the floor impacted by the caved ore-rock, shear cracks mainly located in the upper floor area and tensile cracks in the lower area and the joint zone of floor and surrounding rocks in which the tensile cracks tend to extend to both sides of surrounding rock.
机译：为确保在剩余矿石中提取过程中的地板结构和挖掘安全性的稳定性，研究洞穴矿石对地板的影响至关重要。为此，岩石微型力学理论与使用粒子流动软件PFC2D的使用探讨了矿石岩石块和地板结构动力响应法下的迹象地板的机械特性。结果表明，地板后由塌陷矿石岩，主要位于上层面积和下部区域的拉伸裂缝以及地板的接合区和周围岩石的剪切裂缝，其中拉伸裂纹倾向于延伸到周围岩石的两侧。

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