摘要
我国东部地区的煤矿对于建筑物下压煤广泛采用井下充填开采。针对充填开采覆岩导水裂缝带发育高度问题,采用井下打仰上孔双端堵水观测技术,对唐口煤矿9301充填开采工作面进行了覆岩破坏探测,通过分析基准孔、采后钻孔分段注水观测数据,确定了充填开采导水裂缝带高度值及裂采比。通过采用数值模拟软件UDEC,模拟得到了充填开采工作面不同推进长度下覆岩导水裂缝带发育高度值与覆岩裂缝动态变化规律。基于英国数学家提出的麦克斯韦体(Maxwell体)及鲍依丁-汤姆逊(Poyting-Thomson)岩石蠕变模型,建立了充填体压缩变形量计算公式,提出了通过增加充填抗压强度来降低覆岩导水裂缝带发育高度的方案,为煤矿井下充填开采技术推广应用,实现建筑物下安全开采提供了技术依据。
The underground filling mining is widely used in coal mines under buildings in eastern China.Aiming at the problem of the development height of overlying rock water flowing fractured zone in filling mining,the overlying rock failure detection of 9301 filling mining face in Tangkou Coal Mine was carried out by using the double-end water plugging observation technique on the upper hole of the downhole.By analyzing the observation data of reference hole and post-mining borehole,the height of water flowing fractured zone and split mining ratio in filling mining are determined.The filling mining face is simulated by using UDEC software.The developing height of overburden water flowing fractured zone and the dynamic change rule of overburden fractured zone under different advancing length are obtained.Based on Maxwell body and PoytingThomson rock creep model,the calculation formula of compression deformation of filling belt was established.A scheme to reduce the height of water-conducting fracture zone in overburden by increasing the compressive strength of filling is put forward.This paper provides a technical basis for the popularization and application of underground filling mining technology and the realization of safe mining under buildings.
作者
栾元重
于水
胡军伟
郭传超
史耀凡
岳光波
LUAN Yuanzhong;YU Shui;HU Junwei;GUO Chuanchao;SHI Yaofan;YUE Guangbo(College of Geodesy and Geomatics,Shandong University of Science and Technology,Qingdao 266590,China;Huibaoling Iron Mine,Linyi Shandong Energy Mining Group,Linyi 276017,China;Tangkou Coal Mining Co.,Ltd.,Zibo Shandong Energy Mining Group,Jining 272055,China)
出处
《金属矿山》
CAS
北大核心
2021年第6期216-220,共5页
Metal Mine
基金
山东省自然科学基金面上项目(编号:ZR2020MD024)。
关键词
充填开采
导水裂缝带
压缩变形
探测
数值模拟
filling mining
water flowing fractured zone
compression deformation
detection
numerical simulation
