| 煤岩模型试验相似材料的配比试验 |
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| 引用本文： | 张帆,马耕,陶云奇,刘晓,冯丹,李睿.煤岩模型试验相似材料的配比试验[J].煤田地质与勘探,2018,46(1):119-124. |
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| 作者姓名： | 张帆 马耕 陶云奇 刘晓 冯丹 李睿 |
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| 作者单位： | 河南理工大学能源科学与工程学院;河南能源化工集团研究院有限公司;河南省低渗突出煤层煤与瓦斯共采工程技术研究中心;重庆大学煤矿灾害动力学与控制国家重点实验室;中国矿业大学应用技术学院; |
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| 基金项目： | 河南省创新型科技人才队伍建设工程（164100510024）；2015年河南省科技攻关项目（152102310095）；2016年国家科技部创新方法工作专项（2016IM010400）；国家自然科学基金项目（71472171） |
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| 摘 要： | 相似模型试验是研究煤岩水力压裂裂缝扩展规律的重要手段之一，试验结论的有效性依靠相似材料的正确选材和配比。为开展水力压裂模拟试验，根据目标煤层原煤的力学性能，采用正交设计方法开展了相似材料配比试验，研制出适用于水力压裂试验的相似材料模型。其中，以水泥、石膏作为胶结剂，全粒径煤粉为骨料，通过大量室内试验，重点对相似材料的单轴抗压强度、弹性模量、泊松比、坚固性系数进行测定，对比分析原煤和相似材料强度特性，系统研究不同配比对相似材料参数的影响。结果表明:根据相似材料配比方案得出的相似材料力学性能能够满足煤岩相似模型试验的要求。研究结果可为水力压裂模拟试验中相似材料的选择及配比提供参考和借鉴。
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| 关 键 词： | 煤岩 水力压裂 相似材料 配比 试验研究 |
| 收稿时间： | 0017-04-08 |
Proportioning experiment of similar material for coal and rock model test |
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| Abstract: | The similarity model test is one of the important means to study the law of hydraulic fracture propagation in coal and rock mass, the efficiency of test result depends on the selection and ratio of similar materials. In order to conduct hydraulic fracturing simulation experiment, according to the mechanical properties of raw coal, a proportioning test of similar materials was carried out by means of orthogonal designed method and a suitable similar material model for hydraulic fracturing experiment was developed. Cement and gypsum were selected as binder, coal powder was applied to the aggregate through comparative analysis. The uniaxial compressive strength, elastic modulus, Poisson's ratio and consistent coefficient of similar materials were determined through a series of laboratory tests. The mechanical properties of raw coal and similar materials were analyzed and the effect of different ratios on the mechanical properties of similar materials was studied systematically. The results showed that the mechanical properties of similar materials can meet the requirements of similar model test of coal and rock. The results of the study can provide reference for the selection of similar materials in hydraulic fracturing simulation experiment. |
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