顶板突水对冲击地压的影响

在分析4煤层开采顶板突水水源的基础上, 揭示了矿山压力、冲击地压同顶板突水之间的关系， 探讨了煤层开采过程中顶板突水对促进冲击地压形成的影响作用机理; 基于物理流变学和断裂力学理论, 提出了砾岩粒间隙中的水流失导致砾岩粒界面附近多层次应力局部集中, 造成砾岩产生新的断裂, 形成多层次冲击地压, 促进顶板斑裂线扩展的机制, 阐明了冲击地压和顶板突水互为影响的因果关系, 从理论研究和现场监测2个方面得出了华丰煤矿4煤层开采深度大于520 m时容易形成冲击地压的结论.

Influencing action of water-inrush from roof on rockburst

Based on the analysis of roof water inrush source, the relationship between water inrush from roof and underground pressure and rockburst was revealed. The influencing action mechanism of water inrush from roof accelerating forming rockburst was studied. According to physics flowing change theory and fracture mechanical theory, the mechanism was put forward that the loss of water in conglomerate grains gap caused multi scale underground pressure centralization, made conglomerate broken, and formed multi scale impacting underground pressure, which accelerated roof strata splitting zone development. The each other influencing cause and effect relationship between rockburst and water inrush from roof was clarified, based on the theory research and spot monitor, the conclusion was gotten that when the depth of mining No4 coal layer in Huafeng Coal Mine is over 520 m, the rockburst is easy to form.