铜川矿区多煤层压覆资源量估算及其开发限制

Estimation and Its Development Restrictions of Multiple Coal Seam Overburden Resource Quantity in Tongchuan Mining Area

  • 摘要: 为应对城市边缘地区煤炭资源压覆问题,以铜川市顺金工业园区一片区为例,构建“资源量估算–开发限制识别–技术可采性评估”一体化分析框架,系统研究多煤层压覆特征及其开发协调路径。基于钻探资料与压覆图件,采用移动角法与等厚切片法对5-2号、10号与11号煤层进行资源量估算,压覆总量为122.57万t,其中控制资源量占比35.1%。通过开发受限系数模型量化城市用地压覆耦合强度,引入不可采成因分类模型识别埋深超限、构造破坏与法定保护三类主控因素,并建立可采性提升系数模型,评估不同煤层的技术回采潜力。结果表明:11号煤层具备最高挖潜可能,Ro值达0.109 7,FLAC3D验证其结构稳定性满足局部回采要求。研究成果可为城市边缘区资源压覆识别、压采协调与用地优化提供方法支撑与决策依据。

     

    Abstract: To address the issue of coal resource overburden in urban fringe areas, takes a section of the Shunjin Industrial Park in Tongchuan City as an example, constructs an integrated analysis framework of "resource estimation-development restriction identification-technical recoverability assessment", and systematically studies the characteristics of multi-seam overburden and its coordinated development path. Based on drilling data and overburden maps, the resource estimation of coal seams No. 5-2, No. 10, and No. 11 is conducted using the moving angle method and equal thickness slicing method. The total overburden amount is 1 225 700 tons, of which the controlled resource amount accounts for 35.1%. The development restriction coefficient model is used to quantify the coupling intensity of urban land overburden, and the non-recoverable cause classification model is introduced to identify three main controlling factors: buried depth exceeding limits, structural damage, and statutory protection. A recoverability enhancement coefficient model is established to assess the technical recovery potential of different coal seams. The results show that coal seam No. 11 has the highest potential for tapping, with a Ro value of 0.109 7, and FLAC3D verifies that its structural stability meets the requirements for local recovery. The research findings can provide methodological support and decision-making basis for resource overburden identification, coordinated mining, and land use optimization in urban fringe areas.

     

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