论文部分内容阅读
为了合理确定断层防水煤柱宽度,利用FLAC数值模拟技术,根据小槽煤(太原组12下煤和16煤)重复开采的条件,对断层煤柱宽度进行数值模拟。结果表明,上、下两层煤开采时,围岩应力、塑性区分布及其变化特征不同,所需的断层防水煤柱宽度变化较大,12下煤开采时断层防水煤柱宽度为20 m;16煤重复采动条件所需的煤柱宽度为50 m左右。重复采动条件的断层煤柱留设宽度模拟结果能形象地刻画断层受采动影响程度,指导性更强,比《煤矿防治水规定》中的计算方法更具有一定的优越性,更能有效指导矿井16煤的断层防治水工作。
In order to reasonably determine the width of the waterproof pillars, FLAC numerical simulation is used to simulate the width of the pillars according to the conditions of repeated mining of small coal (Taiyuan Formation 12 coal and 16 coal). The results show that the stress and plastic zone distribution and the variation characteristics of the surrounding rock are different when the upper and lower two layers of coal are mined, and the required width of the waterproof pillars varies greatly. The width of the waterproof pillars in the 12th coal mining is 20 m ; Coal pillar width required for coal reclamation conditions is about 50 m. The simulation results of the reserve width of the reclaimed coal pillar with repeated mining conditions can vividly characterize the extent of mining affected by the mining, guiding more and more effective than the calculation method in “Coal Mine Prevention and Control Water Regulation”, which is more effective Guiding coal mine fault prevention and control work of 16 coal.