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Experimental analysis of the ratio of similar materials by similarity model test on raw coal

机译:用原煤相似模型试验的类似材料比例的实验分析

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摘要

Similarity model test is an effective approach to study the mechanism of hydraulic fracture propagation in coalbed methane reservoirs as well as theoretical analysis and numerical simulation. The efficiency of the similarity model test result is closely related to the selection and ratio of similar materials. Similar material ratio test was conducted to simulate the mechanical parameters of raw coal using orthogonal method and an appropriate similarity model for hydraulic fracturing experiment was developed in this study. Results show that it is suitable to select cement, gypsum as binder and apply pulverized coal as aggregate through the analysis of experimental data. The mechanical parameters of similar materials, including uniaxial compressive strength, elastic modulus, Poisson ratio and firmness coefficient are tested using laboratory tests. The impact of diverse ratios of similar materials on the mechanical parameters is analysed. A proper ratio is selected to make the mechanical parameters of raw coal close to the ones of similar material, in order to meet the demand of the similarity model test based on raw coal. The results can provide theoretical basis and technical support for the selection of similar materials to carry out hydraulic fracturing experiments.
机译:相似之能测试是研究煤层气储层中液压断裂传播机制的有效方法以及理论分析和数值模拟。相似性模型测试结果的效率与类似材料的选择和比率密切相关。进行了类似的材料比试验以模拟原煤的机械参数使用正交方法,并在本研究中开发了适当的液压压裂实验的相似性模型。结果表明,选择水泥,石膏作为粘合剂,通过分析实验数据将粉煤施加为聚集体。使用实验室测试测试类似材料的机械参数,包括单轴抗压强度,弹性模量,泊松比和泊松系数。分析了类似材料对机械参数的不同比率的影响。选择适当的比率以使原煤的机械参数接近类似材料,以满足基于原料煤的相似性模型试验的需求。结果可以为选择类似材料进行液压压裂实验提供理论基础和技术支持。

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