黄河中游采煤沉陷区生态-安全双目标全周期协同治理技术体系研究

    Study on full-cycle collaborative governance technical system with dual goals of ecology and safety in mining subsidence areas of the middle Yellow River Basin

    • 摘要: 针对黄河中游矿区采动沉陷非均匀性突出、生态基底脆弱、沿线基础设施密集,且传统治理存在安全与生态目标割裂、地质适配性不足等短板,采用理论分析、层次分析评价与工程实证相结合的方法,系统研究采煤沉陷时空演化特征及适配性协同治理技术体系。研究结果表明:黄河中游采煤沉陷时空分异显著,沉陷灾害高度集聚于晋陕蒙接壤区及渭北矿区,地表变形历经剧烈变形、缓慢调整、长期稳定三阶段演化过程。本文构建“生态保护-基础设施安全”双目标协同治理框架,完善采前防控、采中管控、采后治理、长效监测的全生命周期治理体系,建立含5维度18项指标的治理技术适配性评价模型,确立了“地质适配、安全优先”的流域沉陷治理准则。工程实践表明:试验区5号煤层开采可诱发长输管道最大下沉量3 200 mm,极限工况下管道应力超限,油气泄漏风险极高;经成套协同技术治理后,管道残余沉降稳定控制为82 mm,优于100 mm安全阈值,沉陷降幅达97.7%,治理区植被覆盖率由18%提升至56%。研究成果可为此类黄河中游黄土覆盖矿区采煤沉陷的全周期、多目标适配化综合治理提供技术支撑。

       

      Abstract: Traditional mining subsidence treatment in the middle Yellow River Basin is restricted by disjointed safety and ecological objectives and insufficient geological adaptability, resulting in poor governance effectiveness under the conditions of highly heterogeneous subsidence deformation, fragile ecological environment and densely distributed linear infrastructures. Combining theoretical analysis, analytic hierarchy process (AHP) and engineering verification, this paper systematically investigates the spatio-temporal evolution characteristics of mining subsidence and develops an adaptive collaborative governance technical system. The results indicate that more than subsidence disasters in the study area are concentrated in the Shanxi-Shaanxi-Inner Mongolia border area and Weibei Mining Area, and surface deformation sequentially experiences severe deformation, slow adjustment and long-term stability stages. A dual-goal collaborative governance framework integrating ecological protection and infrastructure safety is proposed, and a full-cycle governance system covering pre-mining prevention, in-mining dynamic control, post-mining treatment and long-term monitoring is established. An adaptability evaluation model with five dimensions and eighteen indicators is constructed, and the basin-scale governance principle of prioritizing geological adaptation and engineering safety is clarified. Engineering verification shows that the exploitation of the No.5 coal seam can cause a maximum pipeline subsidence of 3200 mm, and extreme working conditions will exceed the allowable pipeline stress, posing a high risk of oil and gas leakage. The proposed integrated technology reduces the residual pipeline subsidence to 82 mm, which is well below the safety threshold of 100 mm, achieving a subsidence control rate of 97.7%. The vegetation coverage of the treated area increases from 18% to 56%. The findings can provide technical references for full-cycle, multi-objective and adaptive comprehensive management of subsidence in loess-covered coal mining areas of the middle Yellow River Basin.

       

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