复杂围岩环境大采高工作面“R-S-P”系统稳定性研究

文章以羊场湾煤矿大倾角大采高工作面为研究对象,结合大采高工作面赋存环境与地质特征,利用FLAC3D数值模拟软件对6.2m采高开采扰动后工作面上下端头应力场分布与演化规律、上—下运巷顶板覆岩及煤柱应力特征规律及煤柱宏观变形特征等进行模拟分析,结果表明:随着开采扰动区域内顶板覆岩的冒落,"顶板覆岩—支护—煤柱"即"R-S-P"系统的主要力学参数发生变化,应力重新分布且各具特征,工作面与煤柱超前应力峰值及应力降低区范围各不相同。

Research on R-S-P System Stabilization of Complicated Surrounding Rock and Large Mining Height Face

The geological condition of the large dip angle and mining height face in Yang Chang Wan coal mine is complicated. The stability of Roof-Support-Pillar system trouble the mining safety, economic concentration and high-efficient. This paper synthesizes the geological condition and features, using FLAC3D simulation software simulate the stress distribution and evolvement laws of up and down ends, roof and pillar stress characteristic of up and down roadway, macro deformation features. The results show: with the roof collapse in mining disturbance area, the major mechanics parameters in “Roof-Support-Pillar” system has changed, and stress has redistributed, the ahead stress peak value of pillar and the range of stress reducing area is different.