搅拌速率对树脂锚固剂孔结构及锚固强度的影响研究
发布时间：2019-03-06 09:35
【摘要】：树脂锚固剂作为锚杆支护技术的主要组成部分,在锚杆与围岩相互作用过程中发挥了极为重要的作用。已有研究多集中于锚杆锚固剂宏观受力及淋水、温度等因素对其受力影响等方面,未从树脂锚固剂内部细、微观结构入手,研究其对力学性能的影响。本文采用理论分析、实验室试验、模拟试验等手段,围绕搅拌速率对树脂锚固剂孔结构及锚固强度的影响展开研究,研究成果如下:(1)基于聚酯类、水泥基材料的反应过程,分析了孔结构形成的过程及影响因素,通过微分法、有限元分析等方法从细观、微观上研究了孔隙率、孔径对材料强度的影响机理,结合材料孔结构形成的过程提出了提高搅拌速率是改善锚固剂锚内部孔结构及锚固强度的有效途径。(2)结合树脂锚固剂的反应过程,分析了锚固剂的固化机理,开展了不同搅拌速率下锚固剂的单轴抗压试验,揭示了不同搅拌速率条件下树脂锚固抗压强度的变化规律,得出了该试验条件下的最优搅拌速率。(3)通过扫描电镜试验(SEM)分析了不同搅拌速率对树脂锚固剂内部孔结构的影响,揭示了不同搅拌速率条件下树脂锚固剂孔结构的变化规律,分析出了锚固剂的单轴抗压强度随孔结构变化的规律。(4)建立锚杆拉拔试验模型,分析了拉拔试验过程中锚固力随搅拌速率的变化过程,得出了锚固力随搅拌速率的变化规律,即树脂锚固剂的锚固力是随搅拌速率的提高而增大的,指出了搅拌速率的变化对树脂锚固剂锚固力影响效果显著。通过分析孔结构的形成及锚固剂的锚固机理,进行抗压试验及扫描电镜试验,揭示了搅拌速率对锚固剂孔结构及锚固强度的影响规律及孔结构与锚固强度间的关系,并进行了锚杆拉拔试验,结果表明通过提高搅拌速率,能有效增强锚固力,提高锚杆的支护效果,增大巷道支护的安全系数,提高矿井经济效益。
[Abstract]:Resin anchoring agent, as the main component of bolt supporting technology, plays an important role in the interaction between bolt and surrounding rock. Most of the studies have been focused on the macro-stress of anchor agent, the influence of water leaching, temperature and other factors on its mechanical properties. The influence of resin anchor agent on its mechanical properties has not been studied from the point of view of fine and microstructure inside the resin anchor agent. In this paper, the effects of stirring rate on the pore structure and Anchorage strength of resin anchors are studied by means of theoretical analysis, laboratory tests and simulation tests. The results are as follows: (1) based on polyester, In the reaction process of cement-based materials, the formation process of pore structure and its influencing factors were analyzed. The influence mechanism of porosity and pore size on the strength of cement-based materials was studied by means of differentiation, finite element analysis and so on. Combined with the formation process of material pore structure, the effective way to improve the internal pore structure and anchor strength of anchoring agent is put forward to improve the stirring rate. (2) the curing mechanism of anchor agent is analyzed by combining the reaction process of resin anchoring agent. Uniaxial compressive tests of anchors at different agitation rates were carried out to reveal the variation of compressive strength of resin anchors under different agitation rates. The optimum stirring rate was obtained under this test condition. (3) the influence of different stirring rate on the pore structure of resin anchoring agent was analyzed by scanning electron microscopy (SEM). The change rule of resin anchor agent pore structure under different stirring rate was revealed, and the change of uniaxial compressive strength of resin anchor agent with pore structure was analyzed. (4) the pull-out test model of anchor was established. The change process of anchoring force with stirring rate during drawing test is analyzed, and the change rule of anchoring force with stirring rate is obtained, that is, the anchoring force of resin anchoring agent increases with the increase of stirring rate. It is pointed out that the effect of the change of stirring rate on the anchoring force of resin anchoring agent is remarkable. By analyzing the formation of pore structure and anchoring mechanism of anchoring agent, compressive test and SEM test were carried out, the influence of stirring rate on the pore structure and Anchorage strength of anchoring agent and the relationship between pore structure and Anchorage strength were revealed. The test results show that by increasing the stirring rate, the anchor force can be enhanced effectively, the supporting effect of the bolt can be improved, the safety factor of roadway support can be increased and the economic benefit of the mine can be improved.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD353
[Abstract]:Resin anchoring agent, as the main component of bolt supporting technology, plays an important role in the interaction between bolt and surrounding rock. Most of the studies have been focused on the macro-stress of anchor agent, the influence of water leaching, temperature and other factors on its mechanical properties. The influence of resin anchor agent on its mechanical properties has not been studied from the point of view of fine and microstructure inside the resin anchor agent. In this paper, the effects of stirring rate on the pore structure and Anchorage strength of resin anchors are studied by means of theoretical analysis, laboratory tests and simulation tests. The results are as follows: (1) based on polyester, In the reaction process of cement-based materials, the formation process of pore structure and its influencing factors were analyzed. The influence mechanism of porosity and pore size on the strength of cement-based materials was studied by means of differentiation, finite element analysis and so on. Combined with the formation process of material pore structure, the effective way to improve the internal pore structure and anchor strength of anchoring agent is put forward to improve the stirring rate. (2) the curing mechanism of anchor agent is analyzed by combining the reaction process of resin anchoring agent. Uniaxial compressive tests of anchors at different agitation rates were carried out to reveal the variation of compressive strength of resin anchors under different agitation rates. The optimum stirring rate was obtained under this test condition. (3) the influence of different stirring rate on the pore structure of resin anchoring agent was analyzed by scanning electron microscopy (SEM). The change rule of resin anchor agent pore structure under different stirring rate was revealed, and the change of uniaxial compressive strength of resin anchor agent with pore structure was analyzed. (4) the pull-out test model of anchor was established. The change process of anchoring force with stirring rate during drawing test is analyzed, and the change rule of anchoring force with stirring rate is obtained, that is, the anchoring force of resin anchoring agent increases with the increase of stirring rate. It is pointed out that the effect of the change of stirring rate on the anchoring force of resin anchoring agent is remarkable. By analyzing the formation of pore structure and anchoring mechanism of anchoring agent, compressive test and SEM test were carried out, the influence of stirring rate on the pore structure and Anchorage strength of anchoring agent and the relationship between pore structure and Anchorage strength were revealed. The test results show that by increasing the stirring rate, the anchor force can be enhanced effectively, the supporting effect of the bolt can be improved, the safety factor of roadway support can be increased and the economic benefit of the mine can be improved.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD353
【参考文献】
相关期刊论文 前8条
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