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首页> 外文会议>2009 International Forum on Porous Flow and Applications（第十届全国渗流力学学术会议） >Numerical Simulation on the Process of Rock Body Injecting GAS
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Numerical Simulation on the Process of Rock Body Injecting GAS

机译：岩体注气过程的数值模拟

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In order to decrease the emission of CO2 to the atmosphere, the people begin to study the underground storage of CO2. In the process of injecting gas, the rock cracking on the action of the gas press is concerned by the people. Aiming at the problems of the fracture and the cracks extending on the action of the gas press, it uses the finite element simulation software of the tension fracture, simulates the process of the rock body injecting gas.Firstly, based on the elastic mechanics and fracture mechanics theory, it simulates the process of the rock body injecting gas under the ground 100 meter. Because the rock tensile strength is smaller than the compressive strength, the rock body damage on the gas injection is the tensile damage on the action of the tension stress. It cracks on the top and bottom of the injection stomata and the gas press of the injection stomata decreases. Because of the crack the stress is changed around the injection stomata, it forms the stress concentration on the tip of the cracks. Through the analysis, we can see that it forms the stress concentration on the tip of the cracks in the rock fracture process. These lead the rock cracks extending and the extending direction of the cracks is consistent with the crack type I of the classical linear elastic fracture mechanics; the gas fracturing process of the numerical simulation is feasible and it can conclude the more ideal effect. It can provide the theory basis for the engineering practice.
机译：为了减少向大气中排放二氧化碳，人们开始研究地下二氧化碳的储存。在注气过程中，人们在压气机作用下产生的岩石破裂是人们关注的问题。针对瓦斯压力作用下的裂缝和裂纹扩展问题，利用拉力裂缝的有限元模拟软件，对岩体注气过程进行了模拟。首先，基于弹性力学和裂缝力学理论，它模拟了岩石在地下100米处注入气体的过程。因为岩石的抗拉强度小于抗压强度，所以岩体对注气的破坏就是在拉应力作用下的拉伸破坏。它在注入气孔的顶部和底部开裂，并且注入气孔的气压降低。由于裂纹的缘故，注入气孔周围的应力发生了变化，从而在裂纹尖端形成了应力集中。通过分析，我们可以看出，岩石破裂过程中应力集中在裂纹尖端。这些导致岩石裂缝的扩展，并且裂缝的延伸方向与经典线性弹性断裂力学中的Ⅰ型裂缝一致。数值模拟的瓦斯压裂过程是可行的，可以得出较为理想的效果。可以为工程实践提供理论依据。

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