摘要
在浅部资源渐趋枯竭的背景下,针对大量“三下”压覆煤炭,离层注浆减沉技术越来越受到广泛应用。不过目前条带式充填开采基础上的离层注浆工艺研究还比较欠缺,结合邢台某矿条带式充填开采+离层注浆减沉实践,通过充填后采高等效换算,条带开采工作面注浆关键层优化、邻空工作面注浆孔位确定和注浆压力持续控制等关键技术,实现了条带式充填开采回收以往煤柱的地表沉降控制,地表沉降幅度在30mm以内,补充了不同条件的离层注浆工艺研究,对以往条带式开采矿井剩余煤柱的绿色回收有重要意义。
Under the background of the gradual exhaustion of shallow resources and the problem of a large number of"three under"coal overlying,the overburden abscission grouting technology for reducing ground subsidence has been more and more widely applied.However,the research on the overburden abscission grouting technology based on strip filling mining is still lacking.Combined with the practice of strip filling mining and overburden abscission grouting technology for reducing ground subsidence in a Xingtai mine,the control of surface settlement is realized when mining the previous coal pillars through the equivalent conversion of mining height after filling,the optimization of grouting key layer in strip mining face,the determination of grouting hole position in adjacent empty working face,the continuous control of grouting pressure and other key technologies.By using this technology,the surface settlement range is controlled within 30mm,which supplements the research on the overburden abscission grouting process under different conditions.It is also of great significance for the green recovery of the remaining coal pillar in the previous strip mining.
作者
秦立涛
张建中
赵福森
杨军辉
徐博会
刘宇鑫
QIN Litao;ZHANG Jianzhong;ZHAO Fusen;YANG Junhui;XU Bohui;LIU Yuxin(Hebei University of Technology,Handan,Hebei 056003;The Second Hydrogeological Team of China Coal Geology Administration,Xingtai,Hebei,054000;Xingtai Xingdong Mine,Jizhong Energy Co.Ltd.,Xingtai,Hebei 054001)
出处
《中国煤炭地质》
2023年第7期41-46,54,共7页
Coal Geology of China
关键词
离层注浆
条带式开采
充填开采
减沉
overburden abscission grouting
strip mining
filling mining
reducing ground subsidence
作者简介
第一作者:秦立涛(1982-),男,河北巨鹿人,高级工程师,从事水文地质和环境地质研究工作。E-mail:409477022@qq.com。
