基于采动-爆裂模型的导水裂隙带高度计算方法

发布时间：2018-03-30 18:46

本文选题：采矿系统　切入点：采动-爆裂模型　出处：《煤炭学报》2017年06期

【摘要】：煤炭开采导水裂隙带高度预测大多采用数值模拟和统计分析方法。基于煤炭现代开采工艺特点,采用系统理论与模拟方法,建立由采动体(开采系统与煤体)与受动体(采动覆岩)组成的采矿系统、"采动-爆裂"物理模型和采动能与应变能的变化关系;类比采动覆岩与岩石爆破的分区效应,确定了岩石爆破安全距离与导水裂隙带高度的关系;基于采矿系统内能量和动量守恒关系,建立了导水裂隙带高度与开采工艺参数和采动覆岩特性的近似关系和高度预测方法;因子灵敏度分析表明,采动因子和等效密度因子影响幅度最大;对采用煤炭现代开采工艺的兴隆庄矿区验证表明预测高度相对误差约为8.8%。
[Abstract]:Numerical simulation and statistical analysis are used to predict the height of water-conducting fracture zone in coal mining.Based on the characteristics of modern coal mining technology, the system theory and simulation method are adopted.A mining system consisting of mining body (mining system and coal body) and receiving body (mining overburden) is established, the physical model of "mining-burst" and the relation between mining kinetic energy and strain energy are established, and the zoning effects of mining overburden and rock blasting are compared.The relationship between the safety distance of rock blasting and the height of water-conducting fissure zone is determined, and the approximate relationship between the height of water-conducting fissure zone and mining process parameters and mining overburden characteristics and the method of height prediction are established based on the conservation of energy and momentum in the mining system.Factor sensitivity analysis shows that the mining movement factor and equivalent density factor have the greatest influence, and the verification of Xinglongzhuang mining area using modern coal mining technology shows that the relative error of prediction height is about 8.8%.
【作者单位】：煤炭开采水资源保护与利用国家重点实验室;神华集团有限责任公司科技发展部;
【基金】：国家重点研发计划资助项目(2016YFC0501104)
【分类号】：TD745

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