深井巷道锚注支护机理研究

发布时间：2018-05-06 11:30

本文选题：锚注支护 + 深部开采　；参考：《河北工程大学》2015年硕士论文

【摘要】：我国煤炭资源开采深度每年以10米的速度向深部延伸，巷道受到高应力的影响越来越大，巷道围岩会呈现出变形量大、破坏范围广、矿压显现剧烈等软岩的特性，给煤矿的安全生产带来很大困难，所以深部巷道的支护机理和支护技术成为安全生产的必须解决的问题。本论文在对深部巷道原支护失效分析的基础上，结合现有深部巷道支护理论和技术成果，对高应力破碎围岩加固支护问题进行研究。通过理论分析、数值模拟相结合的方法对深部巷道支护机理和技术进行了系统的研究. 随着华北地区煤矿采深逐年增加，深部巷道控制问题日显突出，巷道稳定性控制已成为深部开采亟待解决的技术难题。由于深部围岩普遍具有工程软岩特征和高地应力下严重的巷道变形和底臌，现场多采用注浆方式对深部巷硐进行二次、乃至多次加固，效果良好。但是，因对注浆加固机理和注浆参数的研究尚不够完善，根据围岩情况取何种注浆方式才能取得最佳效果也未有充分认识，在注浆加固工程实践中存在盲目性，易造成浪费。本论文采用理论分析、计算机数值模拟等综合研究方法，对高地压巷道围岩破坏机理、巷道围岩变形规律及巷道的支护技术进行了系统和深入地研究。并且对围岩进行稳定性分类；建立了力学模型，分析围岩变形破坏的机理。依据锚注支护和围岩的相互作用原理，对底板和底角实施注浆锚索的新方案。运用FLAC3D数值计算软件，模拟不同支护方案下围岩应力和位移的变化规律，优化出支护方案和支护参数。该研究成果为深井巷道支护技术提供了可靠的科学依据，，并为其他类似条件下的巷道支护提供了有益的借鉴。
[Abstract]:The mining depth of coal resources in China extends to the deep depth at a speed of 10 meters every year, and the roadway is more and more affected by high stress. The surrounding rock of the roadway will show the characteristics of large deformation, wide damage range, intense rock pressure and so on. It brings great difficulties to the safety production of coal mine, so the supporting mechanism and supporting technology of deep roadway become the problem that must be solved in safety production. Based on the failure analysis of the original support of deep roadway, combined with the existing theory and technical achievements of deep roadway support, this paper studies the strengthening and supporting problem of high stress broken surrounding rock. Through theoretical analysis and numerical simulation, the mechanism and technology of deep roadway support are systematically studied. With the mining depth increasing year by year in North China, the control problem of deep roadway becomes more and more serious, and the stability control of roadway has become a technical problem to be solved urgently in deep mining. Because the deep surrounding rock generally has the engineering soft rock characteristic and the serious roadway deformation and the floor heave under the high ground stress, the grouting method is mostly used to reinforce the deep roadway cave twice, and the effect is good. However, because the research on grouting reinforcement mechanism and grouting parameters is not perfect enough, the best grouting method according to surrounding rock condition is not fully understood, and there is blindness in grouting reinforcement engineering practice, which is easy to cause waste. In this paper, the comprehensive research methods such as theoretical analysis and computer numerical simulation are used to study systematically and deeply the failure mechanism of surrounding rock, the deformation law of roadway surrounding rock and the supporting technology of roadway in high ground pressure roadway. The stability of surrounding rock is classified and the mechanical model is established to analyze the mechanism of surrounding rock deformation and failure. According to the principle of the interaction between anchor and grouting support and surrounding rock, the new scheme of grouting anchor cable is applied to the bottom plate and bottom angle. By using FLAC3D software, the stress and displacement of surrounding rock under different support schemes are simulated, and the support scheme and support parameters are optimized. The research results provide a reliable scientific basis for the deep roadway support technology, and provide a useful reference for other similar conditions of roadway support.
【学位授予单位】：河北工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD353

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