1. State Key Laboratory of Water Resource Protection and Utilization in Coal Mining,Beijing　 100011,China; 2. Science and Technology Development Depart-ment,Shenhua Group Corporation Limited,Beijing　 100011,China

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%。

The numerical simulation and statistical analysis method are used to predict the height of the fractured zone in underground coal mining. This paper establishes a mining system composed of a mining-body and an affected-body, based on the system theory and the characteristics of modern coal mining technology,the mining-bursting physics mod- el,and the relationship between mining energy and strain energy. Analogizing the rock fissure with blasted rock effect, the height of water conducting fissure zone is identical to the safety distance of blasted rock. Using the conservation of energy and momentum,the similar fractured zone height is obtained,including the parameters of mining process and the overlying strata. The analysis of the factors sensitivity result shows that the mining and equivalent body density fac- tors are more sensitive than others. The test verification at Xinglongzhuang mining area indicate that the relative height error is about 8. 8% .

国家重点研发计划资助项目(2016YFC0501104)；

Zhang Jianmin,Zhang Kai,Cao Zhiguo,et al. Study on mining-bursting simulation and height calculation method for conducting-water frac- tured zone[J]. Journal of China Coal Society,2017,42(6):1557-1564.