煤矿安全2018，Vol.49Issue(3)：17-20,4.DOI:10.13347/j.cnki.mkaq.2018.03.005
薛湖煤矿穿层水力冲孔周围煤体变形规律研究
Study on Coal Deformation Law of Hydraulic Flushing Passing Through Layer in Xuehu Coal Mine
宝坤 1张明杰 1魏国营2
作者信息
- 1. 河南理工大学安全科学与工程学院,河南焦作454003
- 2. 河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地,河南焦作454003
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摘要
Abstract
In order to study coal deformation law of hydraulic flushing passing through layer to guide Xuehu Coal Mine to control gas outburst,based on the field test,we use FLAC3D software and related theories to study numerical simulation of stress field distribution and displacement field distribution of coal around punching hole,and analyze the influence of the amount of coal on the stress and displacement of the surrounding coal and conduct the field test.We get a series of results,for example,when the amount of coal is up to 1.54 t/m,hydraulic punching makes coal pressure relief around the hole,and the range of the reduction of maximum principal is 2.26 m to 3 m.The tensile stress occurs on the top plate of the hole,coal around the hole forms radial displacement which is point to hole,the range of coal displacement is positively related with the amount of coal,and the range of which is 2.3 m to 3.18 m,and the displacement of the central part of the hydraulic punching is bigger than the bottom.Combined with gas extraction effect,we make comprehensive analysis and comparison to determine that the coal amount of about 1.15 t/m is the reasonable amount of coal in Xuehu Coal Mine.关键词
穿层水力冲孔/煤体变形/数值模拟/位移量/卸压Key words
hydraulic flushing passing through layer/coal deformation/numerical simulation/displacement/pressure relief分类
矿业与冶金引用本文复制引用
宝坤,张明杰,魏国营..薛湖煤矿穿层水力冲孔周围煤体变形规律研究[J].煤矿安全,2018,49(3):17-20,4.
