7m大采高综采工作面导水断裂带发育规律研究  

Study on development law of water conducted zone in fully- mechanized mining face with 7m mining height

作　　者：杨俊哲[1] 

机构地区：[1]神华神东煤炭集团有限责任公司,陕西神木719315

出　　处：《煤炭科学技术》2016年第1期61-66,共6页Coal Science and Technology

基　　金："十二五"国家科技支撑计划资助项目(2012ABC10B00)

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。In order to study the development law of the water conducted zone under the condition of the fully- mechanized high cutting coal mining in the shallow depth seam of west China,based on the fully- mechanized mining face with 7 m mining height in No. 5- 2 seam in Daliuta Mine as the study object,a numerical simulation,theoretical calculation analysis,borehole flushing liquid lost value analysis,digital panoramic borehole imaging observation and other methods were applied. The results showed that the development height of the water conducted zone was related to the deposited structure type of the overburden strata,the width of the coal mining face,the main key stratum location to the seam height and other factors and the variation of the coal mining face size would affected the water conducted zone of the overburden strata. Meanwhile,under the condition of the 7 m mining height,when the length of the coal mining face was 147. 5 m,the development height of the water conducted zone was 68. 76 m and would be 9. 82 times of than the coal mining height. When the length of the coal mining face was 301 m,the development height of the water conducted zone was far over the theoretical value,the height of the fracture zone was 137. 32 m and was 19. 62 times of the mining height. After the mining of No. 5- 2 seam,the measured development height of the water conducted zone was 68. 76 ~ 137. 32 m and the fractured zone height and mining height ratio was 10. 1 ~ 20. 2.

关 键 词：浅埋煤层 7m大采高综采 导水断裂带 钻孔成像 “三带”分布 保水采煤 

分 类 号：TD823[矿业工程—煤矿开采]