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通过数值模拟系统研究了矿山压力作用下郑州矿区超化煤矿22061工作面“三软”煤层底板采动变形破坏的深度及其受岩层组合结构控制的变化规律.提出了在正常采动情况下软顶、厚的软煤和软底的“三软”煤层底板变形仅发生在一定浅部范围内,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.揭示了中段灰岩组(L7、8灰)对应力分布和变形破坏的重要控制作用,并与该面的实测相关结果进行了对比分析.这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力学的参考依据.
Through the numerical simulation system, the depth of mining deformation and control of 22061 working face and the “three soft” seam floor of Chaohua Mine in Chaohua Mine under the pressure of mine are studied, Under soft top and thick soft coal and soft bottom, the deformation of the floor of the “three soft” coal seam occurred only within a certain shallow part, and thick soft coal and soft bottom had a certain buffer effect on the stress and deformation propagation. The important control effect of stress distribution and deformation and failure of limestone group (L7,8 ash) in the middle section was analyzed and compared with the actual measured results of the surface, which is the key to the prevention and control of floor water caused by deep mining of coal resources in western Henan Provides a reference for some mechanics.