摘要
本文在现场观测的基础上,以谢桥矿综放工作面工程地质和开采技术条件为背景,对一次采厚不同情况下的综放巷道围岩应力分布进行了系统的数值分析研究。研究结果表明:随一次开采厚度的增加,综放回采巷道位移变化和应力变化截然不同。随采厚的增加,综放巷道的位移量明显增大,变形与一次开采厚度成正比;随一次采厚的增加,综放巷道围岩的应力降低,其峰值大小与一次采厚成反比,峰值距工作面煤壁距离与一次采厚成正比,即随一次采厚增加,围岩应力影响范围增大,而峰值降低。该研究成果为采场巷道合理布置与维护及综放开采动力灾害的防治,提供了理论依据。
In this paper, the mechanical field characteristics of fully mechanized top-coal caving （FMTC） laneway surrounding rock are researched systematacially based on the results of in-situ measurement combined with numerical simulation in different mining thickness. With increment of caving seam, the results show there is complete different variation between displacement and stress in fully mechanized top-coal caving laneway. With increment of caving seam, the displacement of laneway increases obviously and the deformation is proportional to caving seam; but the stress of surrounding rock fails down with increment of caving seam, maximum stress and caving seam have inverse relation, and the diatance of maximum stress depart from face have direct proportion. In general, with increment of caving seam, the scope of surround rock stress influence is expanding and the value of maximum stress falls down. The results of this paper can supply the theoretic basis for the reasonable layout and maintaining, prevention and control of dynamic disasters of fully mechanized top-coal caving laneway etc.
出处
《矿冶》
CAS
2008年第4期1-5,共5页
Mining And Metallurgy
基金
国家自然科学基金资助项目(50674003)
安徽省高等学校省级自然科学研究项目(KJ2007B263)
安徽省高校青年教师科研计划资助项目(2008jp1034zd)
关键词
综放开采
采厚效应
深部围岩位移
fully mechanized top-coal caving
mining thickness effect
displacement of deep surrounding rock
