高潜水位平原矿区采煤塌陷地复垦方向划定及规划分区
Reclamation direction delimitation and planning division of coal mining subsidence areas with high water level plain mining area
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摘要: 高潜水位平原矿区采煤沉陷范围广、深度大,积水严重,土地利用条件相对复杂。为科学指导该区域采煤塌陷地综合治理的设计与施工,以济宁市为例,通过收集济宁市辖区内各矿地质采矿资料、现有观测成果以及土地利用现状资料,在充分掌握采煤塌陷地损毁现状的基础上,利用概率积分预计软件对济宁市截至2020年的采煤沉陷情况进行了分区块科学预测,并确定了土地损毁程度与工程治理边界的界定标准。基于济宁市采煤塌陷地损毁特征,在科学确定土地单元利用方向的基础上,提出了适合济宁市采煤塌陷地的综合治理模式。结果表明:随着煤炭资源的开采,地表沉陷深度与塌陷范围逐步扩大,不同区域土地损毁特征显著不同;确定了影响济宁市采煤塌陷土地利用的主要影响因素有地面坡度、塌陷类型、地下水埋深、复垦难易程度、沉陷稳定性5项自然因子指标和城镇区位、交通条件、水源条件、政策导向、已治理区现状5项社会经济因子指标,从农业综合治理、生态综合治理、城市功能建设3个角度获得了土地利用评价成果;将济宁市采煤塌陷地分为东部矿区生态景观治理区、中部矿区城市功能开发治理区、西北部矿区农业综合治理区、南部矿区环湖特色产业治理区4个治理区,优化了治理区的治理利用方向与区域土地利用结构,实现了节约集约用地,促进了区域可持续发展。Abstract: The mining subsidence land in the high water level plain mining area has the characteristics of wide range, large depth, serious water accumulation, and relatively complicated land use conditions.In order to scientifically guide the design and construction of comprehensive management of coal mining subsidence in this area, taking Jining City as an example in this study,the geological and mining data,existing observations and land use status data of various mines in Jining City district were collected.On the basis of fully grasping the current status of coal mining subsidence land,the probability prediction software was used to predict the coal mining subsidence of Jining City by 2020, and the extent of land damage and the delimitation criteria of management boundary were determined.According to the damage characteristics of coal mining subsidence land in Jining City, based on the land unit utilization direction, a comprehensive treatment model suitable for coal mining subsidence land in Jining City was proposed.The result show that the surface subsidence depth and subsidence range have gradually expanded,and the characteristics of land damage in different regions are significantly different with the exploitation of coal resources.The main influencing factors that determining the coal mining subsidence land use in Jining City include five natural factor indexes of ground slope, subsidence type, groundwater depth, degree of reclamation difficulty, subsidence stability, and five social and e-conomic factor indexes of urban location, traffic conditions, water source conditions, policy guidance and the current situation of the treated area.The land application results were obtained from three perspectives:comprehensive agricultural management,comprehensive ecological management, and urban function construction.The mining subsidence land in Jining City is divided into four management areas, i.e.ecological landscape management area in the eastern mining area, urban functional development and management area in the central mining area, agricultural comprehensive management area in the northwest mining area, and characteristic industrial management area around the lake in the southern mining area.At the same time, the management and utilization direction and regional land use structure of the governance area are optimized to achieve the purpose of saving intensive land and promoting regional sustainable development.