【作者】 王荣超；

【导师】 王同旭；

【作者基本信息】 山东科技大学 ， 工程力学， 2008， 硕士

【摘要】 本文以义马杨村矿某综放工作面为工程背景,建立模型,采用UDEC数值模拟软件,首先对综放工作面推进过程中支承压力分布规律进行了离散元模拟分析,得出支承压力分布规律随推采长度变化规律,验证了小煤柱沿空掘巷结论的正确性,并对内外应力场的形成条件进行了探讨。在此基础上,采用UDEC软件分析了节理特征参数对综放沿空巷道围岩稳定性的影响,并重点从巷道顶板节理面之间的水平挤压力、巷道顶板下沉量和围岩破坏等方面,对不同锚固形式、锚杆长度、有无托盘与钢带、不同块体尺寸、不同埋深等情况下,综放沿空巷道进行了模拟分析,得到以下结论:节理岩体锚杆支护作用,可明显增加岩块之间节理面的水平挤压力,从而加大节理面的摩擦力,维护围岩稳定;托盘和钢带在预应力锚杆支护中可显著改善锚固支护效果。以上结果对义马杨村煤矿的采煤掘巷及巷道锚固支护提供了理论依据,较好的指导了现场。更多还原

【Abstract】 The model is generated in the paper taking the fully mechanized caving face in Yang-village mine, Yima group as engineering background, Based on the UDEC numerical simulation software: Firstly, the distribution law of abutment pressure during the advancing process of the fully mechanized caving face is simulated in discrete element, and the change law of distribution law of abutment pressure with the push mining length is obtained; the validity for the conclusion of small pillar gob-side entry is validated , and the conditions forming internal-external stress fields are discussed. Further, using UDEC software the influence of joint characteristics parameters on surrounding rock stability of fully-mechanized caving roadway is analyzed, and from the aspects of the horizontal compressive stress between joint surfaces of roof, the roof sinking magnitude and surrounding rock failure and so on, the fully-mechanized caving roadway is simulated with different anchorage form and bolt length, with pallet and steel belt or not, different block size and different buried depths. and the conclusions are obtained as follows: the horizontal compressive stress between joints surfaces of rock block is significantly increased with the bolt support effect of joints rock, so the friction of joint surface is increased and the surrounding rock stability is maintained and the anchorage support effect is significantly improved in pre-stressed bolting support using pallet and steel belt.. The results provides a theoretical basis and guide to the scene to the roadway and tunnel dug anchoring of Yima Yangcun Coal Mine.更多还原