摘要
以大佛寺煤矿为试验矿井，采用钻孔电视系统和钻孔简易水文观测法，探测深埋特厚煤层综放开采顶板导水裂缝带发育高度，并对导水裂缝带演化特征进行相似模拟和数值模拟试验研究。研究分析表明：大佛寺煤矿深埋特厚煤层综放开采顶板导水裂缝带发育高度为170．80～192．12m；裂缝带区域内，裂隙数量自上而下逐渐增多，近煤层区域裂隙异常发育；钻孔砂岩区域，受拉伸作用，形成了纵横交错的裂隙，裂隙尺寸、角度较大；工作面回采距离与顶板导水缝隙带发育高度曲线呈“台阶”型。
At Dafosi Coal Mine, a borehole televiewer system and a borehole flushing fluid leakage method were used to monitor the height of water flowing fractured zone of overburden in a deep buried extra thick coal seam fully-mecha- nized caving mining face. Also, a similarity simulation experiment and a numerical simulation experiment on the devel- opment characteristics of water flowing fractured zone were conducted. The research results show that ： ① The height of water flowing fractured zone of overburden in a deep buried extra thick coal seam fully-mechanized caving mining face at Dafosi Coal Mine is from 170.80 m to 192. 12 m.② In fractured zone,the number of fissures increases from top to bottom, the fissures near coal seam zone are well developed. ③ In sandstone zone, due to tension effect, the fissure of criss-cross is mainly with high dimension and high angle. ④ The curves of mining distance and the height of water flowing fractured zone is step-shaped.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2014年第10期1970-1976,共7页
Journal of China Coal Society
基金
"十二五"国家科技支撑计划资助项目(2012BAC10B03)
国家自然科学基金重点资助项目(51034003
41402220)
关键词
特厚煤层
综放开采
导水裂缝带
发育特征
extra thick coal seam
fully mechanized caving mining
water flowing fractured zone
development charac- teristics
