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以补连塔风积沙矿区12407工作面为研究背景,采用层次分析法,从开采因素和地质因素2个方面选取了9个指标作为开采沉陷的影响因子,建立了风积沙矿区开采沉陷影响因素分析模型。在此基础上构造了5个具有不同松散层厚度、基岩厚度、沙基比和覆岩综合普氏硬度的数值实验模型,进行了数值分析。研究表明,采深保持不变时,松散层厚度和沙基比与地表最大下沉值正相关,基岩厚度和覆岩综合普氏硬度与地表最大下沉值负相关。
Based on the study of 12407 working face in Fuling Zhasha mining area, using the analytic hierarchy process (AHP), nine indexes were selected as the influencing factors of mining subsidence from two aspects of mining and geological factors, and the influence of subsidence Factor analysis model. On this basis, five numerical experimental models with different thickness of loose layer, bedrock thickness, sand base ratio and overburden hardness were constructed and numerical analysis was carried out. The results show that the thickness of loose layer and sand-base ratio are positively correlated with the maximum subsidence of the surface when the mining depth remains unchanged. The bedrock thickness and overburden hardness are negatively correlated with the maximum subsidence.