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首页> 外文期刊>資源と素材: 资源·素材学会志 >Effect of Crack Orientation on Gas Permeability of Coal and Gradient of Gas Pressure -Study on Gas Permeability of Coal by Crack Network Model (3 rd Report)
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Effect of Crack Orientation on Gas Permeability of Coal and Gradient of Gas Pressure -Study on Gas Permeability of Coal by Crack Network Model (3 rd Report)

机译：裂缝取向对煤气渗透煤气压力煤气渗透性的影响（第3次RD报告）

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摘要

The purpose of the present study is the effect of crack orientation on the gas permeability and gradient of gas pressure in coal. Practically, the model of anisotropic crack network was applied to the computer simula-tions under the state of an uniaxial compressive stress. Additionally, the simulations of gas permeation and gas pressure were investigated by setting the normal distribution as the frequency distribution of crack orienta-tion. The results of these simulations were as follows.1) The anisotropy of crack orientation in coal is very effective on gas permeability, and the gas perme-ability in the orientation of maximum principal stress is higher than that of minimum principal stress.2) In the anisotropy crack network, the gas permeable cracks of the direction of minimum principal stress close at their neck. Consequently, gas flow is intercepted by the difference stress between an external stress and gas pressure in the cracks of the direction of minimum principal stress become high.3) The occurrence mechanism of a gas outburst is explained by applying the bending theory of circular plates to the anisotropic crack network saturated with high pressures gas.
机译：本研究的目的是裂缝取向对煤中气体压力透气性和梯度的影响。实际上，在单轴压缩应力的状态下将各向异性裂缝网络模型应用于计算机模拟。另外，通过将正态分布设定为裂缝型环形频率分布，研究了气体渗透和气体压力的模拟。这些模拟的结果如下。各向异性裂缝网络，气体渗透裂缝的最小主应力靠近颈部。因此，通过在最小主应力方向的裂缝中的裂缝之间的外部应力和气体压力之间的差应力拦截气流.3）通过施加圆形板的弯曲理论来解释气体突出的发生机理各向异性裂缝网络饱和高压气体。

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