摘要
为确定厚冲积层下深部厚煤层综放开采导水裂隙带发育高度,以新巨龙煤矿1302N工作面为工程背景,采用井下仰孔双端封堵分段注水测漏观测方法,对深部厚冲积层下厚煤层综放工作面导水裂隙带高度进行了现场实测。观测结果表明:采前孔受采动影响小裂隙发育较弱,钻孔漏损量变化不明显;采后孔受采动影响裂隙发育显著,钻孔漏损量变化呈现稳定—突然增大—稳定—突然减小—稳定的过程;钻孔漏损量结果表明,导水裂隙带发育呈现"马鞍形"状态,最大发育高度94.65m,裂采比为10∶1。
In order to determine the developing height of water flowing fractured zone in deep full-mechanized top coal caving mining face under thick alluvium, taking the 1302N working face of Xinjulong Coal Mine as engineering background, double-end plugging drilling sectioning water injection leak-checking method was used to measure the height of the water flowing fractured zone. The observation results showed that the drilling hole before mining was less effected by the mining, so the fracture develop- ment was weak and the change of the drilling water leakage was not obvious; the fracture development of drilling hole after mining was obvious, and the change process of water leakage was stable, suddenly increscent, stable, suddenly decrescent and stable. The drilling water leakage showed that the development of the water flowing fractured zone presented as saddle shape, and the maximum development height of the water flowing fractured zone was 94.65 m and the ratio of the height of the fractured zone to the mining height was about 10 ： 1.
出处
《中国煤炭》
北大核心
2017年第11期60-63,68,共5页
China Coal
基金
山东省科学基金资助项目(ZR2014EEM001)
中国博士后科学基金第九批特别资助(2016T90662)
关键词
深部厚冲积层下
综放开采
双端封堵测漏
导水裂隙带
裂采比
under deep thick alluvium, fully mechanized top coal caving mining, double end plugging leakage, water flowing fractured zone, ratio of the height of the fractured zone to the mining height
