| 煤层底板水害超前区域治理理论框架与关键技术 |
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| 引用本文： | 董书宁,刘其声,王皓,郭小铭,柳昭星,郑士田,南生辉,刘建林,赵兆,石志远.煤层底板水害超前区域治理理论框架与关键技术[J].煤田地质与勘探,2023,51(1):185-195. |
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| 作者姓名： | 董书宁 刘其声 王皓 郭小铭 柳昭星 郑士田 南生辉 刘建林 赵兆 石志远 |
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| 作者单位： | 1.中煤科工西安研究院(集团)有限公司，陕西 西安 710077 |
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| 基金项目： | 国家重点研发计划课题(2017YFC0804102) |
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| 摘 要： | 随着我国华北型煤田浅部煤炭资源开采殆尽,深部煤炭资源受底板灰岩岩溶水害威胁严重,常规井下直孔注浆方式存在施工位置受限、钻遇含水层孔段短、注浆盲区大、目标位置不准确等问题。为此,提出了基于顺层定向钻孔进行注浆改造的超前区域治理技术,系统研究了顺层近水平注浆孔浆液运移规律、底板水害超前注浆模式、注浆参数控制工艺、隐伏导水通道超前判识探查与注浆效果检验与评价等。通过系统研究,构建煤层底板水害超前区域治理理论框架与技术体系,具体包括5方面内容:提出煤矿底板水害超前区域治理模式分类和选择准则,概化形成适用于我国华北型煤田地质及水文地质条件的底板含水层注浆改造模式;形成隐伏导水通道水平定向钻超前判识治理技术;建立超前区域治理关键注浆参数控制工艺体系;提出了注浆全过程的多指标定性、定量效果检验与评价技术。上述研究成果在煤层底板水害超前区域治理工程中成功应用,对底板水害超前区域治理起到重要的理论和技术支撑作用,为我国华北型煤田深部煤炭资源安全开采提供保障。
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| 关 键 词： | 煤层底板水害 超前区域注浆 治理模式 注浆参数控制 通道判识 效果检验 |
| 收稿时间： | 2022-10-28 |
Theoretical framework and key technology of advance regional control of water inrush in coal seam floor |
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| Institution: | 1.CCTEG Xi’an Research Institute (Group) Co., Ltd., Xi’an 710077, China2.Shaanxi Key Laboratory of Prevention and Control Technology for Coal Mine Water Hazard, Xi’an 710077, China |
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| Abstract: | The shallow coal resources in North China have been nearly depleted so far, whereas deep coal development is challenged by karst water inrush in floor limestone. The conventional underground vertical hole grouting methods are troubled with inappropriate site location, thin drilling-met aquifer, large grouting blind area, and inaccurate target location. For this reason, we propose an advance regional control technology: bedding directional drilling-based grouting. We systematically study the slurry flow from near-horizontal grouting holes, advance grouting modes, grouting parameter control, advance identification of potential water diversion channels, as well as validation and assessment of a grouting treatment. On this basis, we formulate a theory and technology system for advance regional control of water inrush in coal seam floor, which consists of the following five parts: the classification and selection criteria of an advance regional control method of water rush in coal seam floor, the grouting mode applicable to the geological and hydrogeological conditions of coals in North China, the advance identification and management of horizontal directional drilling for potential water diversion channels, and the determination of key grouting parameters for advance regional control, and the qualitative and quantitative evaluation of multi-index for the entire grouting process. The above research results are successfully applied in an advance regional control of water inrush in coal seam floor, and provide important theoretical and technical support in the advance regional control of seam water inrush, as well as the safe mining of deep coal resources in North China. |
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