摘要
为研究寺家庄煤矿15106工作面回采过程中上覆岩层裂隙的动态发育规律,基于工作面覆岩地质条件,采用理论分析、数值模拟和相似模型实验的方法研究覆岩裂隙的发育,并划分“三带”。依据矿业控制理论,得到垮落带高度为14.37~17.25 m,裂隙带高度为54.8~72.6 m。基于UDEC软件,模拟得到k 2石灰岩底板距离煤层顶板18 m为跨落带高度,k 4石灰岩底板距离煤层顶板66 m为裂隙带高度。根据相似模型实验得到垮落带高度为18 m,裂隙带高度为64 m。理论分析、数值模拟和模型实验得到覆岩“三带”高度基本一致,以坚硬的石灰岩高度为准,确定垮落带高度18 m,裂隙带高度66 m,为高抽巷层位选取提供了一定的理论指导。
In order to study the dynamic development law of overlying strata fissures during the mining process of 15106 working face in Sijiazhuang coal mine,based on the geological conditions of the overlying strata of the working face,theoretical development,numerical simulation and similar model experiments are used to study the development of overburden fractures zones.According to the mining control theory,the height of caving zone is 14.37-17.25 m,and the height of fractured zone is 54.8-72.6 m.Based on the UDEC software,the simulation results show that the k 2 limestone floor is 18 m from the roof of the coal seam,and the height of the k 4 limestone floor is 66 m from the roof of the coal seam.According to the similar model experiment,the height of caving zone is 18 m,and the height of fractured zone is 64 m.Theoretical development,numerical simulation and model experiments show that the height of“three zones”of the overburden is basically the same.Based on the height of the hard limestone,the height of caving zone is 18 m,and the height of fractured zone is 66 m.The results provide some theoretical guidance for the selection of high drainage lanes.
作者
余北建
YU Beijian(Yangquan Coal Industry(Group)Limited Liability Company,Yangquan 045000,China)
出处
《中国矿业》
2021年第3期193-197,共5页
China Mining Magazine
基金
低透气性煤层开采低位抽放巷瓦斯治理技术项目资助(编号:YM17057)。
关键词
覆岩
裂隙
UDEC软件
相似模型
三带
overlying rock
fracture
UDEC software
similar model
three-zone
