论文部分内容阅读
通过现场应变实测系统研究了郑州矿区超化煤矿“三软”煤层底板采动变形破坏的深度及其受采动煤壁前方影响的范围。得出了在正常采动情况下厚的软煤和软底对应力和变形的传播具有一定的缓冲作用,受超前应力集中的影响,竖直应力的变化比水平应力大。揭示了中段灰岩组对应力分布和变形破坏的重要控制作用,为豫西煤炭资源向深部开采所引起的底板水防治提供了部分参考的依据。
Through the field strain measurement system, the depth of mining deformation and failure of the “three soft” coal seam floor in Zhengzhou coal mine and the range affected by the front of the mining coal wall are studied. It is concluded that the thick soft coal and soft floor under normal mining condition have a certain buffer effect on the propagation of the stress and deformation. The vertical stress changes more than the horizontal stress under the influence of the advanced stress concentration. Which reveals the important control of stress distribution and deformation and failure in the middle limestone group and provides some references for the prevention and treatment of the floor water caused by the deep exploitation of coal resources in western Henan.