Impact Breakage Behavior of Stope Floor in Mined-out Space

摘要：

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.

关键词： rock micro-mechanics PFC impact breakage dynamical response

作者: ZHOU Ke-ping ZHANG Chao-lan DENG Huan-yu Lei Tao

作者单位: School of Resources and Safety Engineering, Hunan Key Lab of Mineral Resources Exploitation and Hazard Control for Deep Metal Mines, Central South University, Changsha 410083, Hunan, China

会议类型: 国际会议

会议名称: The First International Symposium on Mine Safety Science and Engineering (首届矿山安全科学与工程学术会议)

会议地点: 北京

会议语种:英文

页码: 247-255

在线出版日期: 2011-10-27（万方平台首次上网日期，不代表论文的发表时间）