寺家庄矿15106采煤工作面覆岩裂隙“三带”规律研究
投稿时间:2019-11-07  修订日期:2021-01-19  点此下载全文
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作者单位邮编
余北建 阳泉煤业集团有限责任公司 045000
基金项目:低透气性煤层开采低位抽放巷瓦斯治理技术(YM17057)
中文摘要:为研究寺家庄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程序,模拟得到k2石灰岩底板距离煤层顶板18 m为跨落带高度,k4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。理论推导、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。
中文关键词:覆岩  裂隙  UDEC  相似模型  三带
 
Study on the
Abstract:In order to study the dynamic development law of overlying strata fissures during the mining process of 15106 working face in Sijiazhuang, based on the geological conditions of the overlying strata of the working face, theoretical development, numerical simulation and similar model experiments were 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 program, the simulation results show that the k2 limestone floor is 18 m from the roof of the coal seam, and the height of the k4 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 derivation, 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. Provides some theoretical guidance for the selection of high drainage lanes.
keywords:Overlying rock  fracture  UDEC  similar model  three-zone
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