| 废弃煤矿瓦斯资源估算与评价方法构建及应用 |
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| 引用本文： | 刘小磊,闫江伟,刘操,贾天让,冯阵东,魏建平,魏国营.废弃煤矿瓦斯资源估算与评价方法构建及应用[J].煤田地质与勘探,2022,50(4):45-51. |
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| 作者姓名： | 刘小磊 闫江伟 刘操 贾天让 冯阵东 魏建平 魏国营 |
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| 作者单位： | 1. 河南理工大学安全科学与工程学院;2. 河南省瓦斯地质与瓦斯治理省部共建国家重点实验室培育基地;3. 煤炭安全生产与清洁高效利用省部共建协同创新中心 |
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| 基金项目： | 河南省高等学校重点科研项目计划(21A440006)； |
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| 摘 要： | 基于我国废弃煤矿瓦斯资源勘探开发现状，为合理评估我国废弃煤矿瓦斯资源，提出“资源估算+初步评价”的思路，建立废弃煤矿瓦斯资源估算和评价方法，该方法具有所需参数少和实用性强等优点；依据废弃煤矿瓦斯涌出特点及废弃时间，划分废弃煤矿类型，将其分为稳定型和非稳定型两大类，非稳定型进一步划分为初期、中期和后期3个阶段；根据废弃煤矿类型及瓦斯赋存特征，构建废弃煤矿瓦斯资源评价模型，将废弃煤矿瓦斯资源划分为16个类型，分析认为废弃煤矿中瓦斯资源主要以保有煤炭资源中赋存的瓦斯资源为主，动用煤炭遗煤中瓦斯资源及可解吸量相对较少；基于各类型的特点，从瓦斯资源和赋存角度，将其开发价值划分为相对较好、相对中等、相对较差和相对最差四级。最后以焦作矿区为例，统计主要煤矿关闭时间，划分废弃煤矿类型，重点评价2006年以来关闭的非稳定型废弃煤矿。估算焦作矿区近15年来，开采层废弃煤矿瓦斯资源量约为26.06×108 m3，其中，保有煤炭资源中瓦斯资源量约为20.75×108 m3，动用煤炭遗煤中瓦斯资源量约为5.31×108 m3，开发价值相对较好。
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| 关 键 词： | 废弃煤矿 瓦斯资源量 瓦斯赋存 类型划分 评价模型 |
| 收稿时间： | 2021-07-26 |
Construction and application of gas resource estimation and evaluation method in abandoned coal mines |
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| Abstract: | On the basis of on the exploration and development status of gas resources in abandoned coal mines in China, the idea of “resource estimation + preliminary evaluation” was put forward to reasonably evaluate the gas resources in abandoned coal mines. The estimation and evaluation method of gas resources in abandoned coal mines was established, which has the advantages of less required parameters and strong practicability. According to the gas emission characteristics and abandoned time, the types of abandoned coal mines were divided into two categories: stable and unstable. Unstable coal mines were further divided into early, middle and late stages of unstable coal mines. Furthermore, the evaluation model of abandoned coal mine gas resources was constructed according to the types of abandoned coal mines and gas occurrence characteristics. The abandoned coal mine gas resources were divided into 16 types. The analysis shows that the gas resources in abandoned coal mines are mainly dominated by the gas resources existing in the coal resources, and the gas resources and desorption amount in the residual coal are relatively small. Besides, based on the gas resources and occurrence, the development value was divided into four grades: relatively good, relatively medium, relatively poor and relatively worst. Finally, taking Jiaozuo mining area as an example, the abandoned time of coal mines was counted, the types of abandoned coal mines were divided, and the unstable abandoned coal mines closed since 2006 were emphatically evaluated. It was estimated that the amount of gas resources in abandoned coal mines of mining coal seam is about 26.06×108 m3 in the past 15 years in Jiaozuo mining area. Among them, the amount of gas resources in reserved coal resources is about 20.75×108 m3, and the amount of gas resources in the residual coal is about 5.31×108 m3. The development value is relatively good. |
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