7m大采高综采工作面导水断裂带发育规律研究

发布时间：2018-01-04 01:27

本文关键词：7m大采高综采工作面导水断裂带发育规律研究　出处：《煤炭科学技术》2016年01期 　论文类型：期刊论文

【摘要】：为研究西部浅埋煤层大采高综采条件下导水断裂带的发育规律,以大柳塔煤矿5-2煤层7m大采高综采工作面为研究对象,采用数值模拟、理论计算分析、钻孔冲洗液漏失量分析和数字全景钻孔成像观测等方法。结果表明:导水断裂带发育高度与覆岩赋存结构类型、工作面长度以及主关键层位置距煤层高度等因素有关,工作面尺寸的变化对覆岩导水断裂带影响较大,同样7 m大采高条件下,工作面长度为147.5 m时,导水断裂带发育高度为68.76 m,为采高的9.82倍;工作面长度为301m时,导水断裂带发育高度远超出理论值,断裂带高度为137.32 m,为采高的19.62倍。5-2煤层采后实测导水断裂带发育高度为68.76~137.32 m,裂采比为10.1~20.2。
[Abstract]:To study the shallow seam of fully mechanized mining under the condition of development of water guide fault zone, 7m 5-2 coal seam in Daliuta coal mine fully mechanized mining working face as the research object, using numerical simulation, theoretical calculation and analysis of drilling fluid leakage analysis and digital panoramic borehole imaging observation and other methods. The results showed that: the water flowing fractured zone height and rock occurrence structure types, about the length of the working face and the location of primary key stratum from the coal seam height and other factors, changes in working face and size of the overlying water flowing fractured zone is larger, the same 7 m high mining conditions, the length of working face is 147.5 m, water conducting fracture with the development of the height of 68.76 m, 9.82 times of mining height; the length of the working face is 301m, water flowing fractured zone height is far beyond the theoretical value, the fracture zone height was 137.32 m, 19.62 times.5-2 mining height of coal mining after the measured water flowing fractured zone height is 68 .76~137.32 m, the split recovery ratio is 10.1~20.2.

【作者单位】：神华神东煤炭集团有限责任公司;
【基金】：“十二五”国家科技支撑计划资助项目(2012ABC10B00)
【分类号】：TD823;TD745
【正文快照】： 0引言煤层采出后,上覆岩层由下至上依次会形成垮落带、断裂带和弯曲下沉带,其中断裂带的发育高度与矿井水害评价以及水资源流失程度密切相关。国内学者从20世纪60年代开始,就开展了此方面的研究,取得了一系列研究成果,并形成了相关的行业规范性文件,对水体下安全生产及保水开

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