浅埋近松散含水层下综放开采覆岩破坏特征  

Overlying Strata Broken Characteristic of Fully Mechanized Top Coal Mining under Nearly Loose Aquifer in Shallow

作　　者：申晨辉 康永华 刘秀娥[1,2] 宋业杰[1,2] 赵秋阳[1,2] 郭英杰[3] SHEN Chen-hui;KANG Yong-hua;LIU Xiu-e;SONG Ye-jie;ZHAO Qiu-yang;GUO Ying-jie(Mining Institute,China Coal Research Institute,Beijing 100013,China;Coal Mining & Designing Department,Tiandi Science & Technology Co.,Ltd.,Beijing 100013,China;Inner Mongolia Pingzhuang Coal Mine Group Co.,Ltd.,Chifeng 024047,China)

机构地区：[1]煤炭科学研究总院开采研究分院,北京100013 [2]天地科技股份有限公司开采设计事业部,北京100013 [3]内蒙古平庄煤业(集团)有限责任公司,内蒙古赤峰024047

出　　处：《煤矿开采》2019年第1期77-80,共4页Coal Mining Technology

基　　金：国家科技重大专项大型油气田开发项目(2016ZX05045007-003);国家自然科学基金资助项目(51874177;51704161)

摘　　要：为实现浅埋近松散含水层下厚煤层综放安全开采,综合采用数值模拟、钻孔冲洗液漏失量观测和钻孔电视观测方法,对伊犁四矿覆岩破坏特征进行研究。研究结果表明:21-1煤层覆岩破坏最大高度可按照垮采比3.3进行预计,垮落带顶点距离古近系含水层22.72～25.35m,由于煤层埋深浅且基岩柱薄,导水裂缝带高度将穿过基岩柱,发育至第四系松散层底部,研究结论可为伊犁四矿后续水体下安全开采提供数据支撑。In order to realize safety mining of fully mechanized top coal caving of thick coal seam under nearly loose aquifer in shallow,based on number simulation,drilling liquid leakage and borehole televiewer observation,the overlying strata broken characteristic of Yili four coal mine was studied.The results showed that the maximal broken height of overlying strata of 21-1 coal seam could be estimated by caving-height ratio 3.3,the distance of the peak point of caving zone to the Palaeogene aquifer was 22.72~25.35m,because coal seam in shallow and thin base rock,the water flowing fractured zone height passed the bedrock column,and reached to the loose layer bottom of the Quaternary,the conclusions could provide data supporting for safety mining under water body of Yili four coal mine.

关 键 词：浅埋深 综放开采 覆岩破坏 数值模拟 钻孔实测 

分 类 号：TD823.4[矿业工程—煤矿开采]