基于压降法测定预抽煤层瓦斯穿层钻孔有效影响半径的应用  

Application of Pressure Drop Method to Measure Effective Influence Radius of Gas Penetration Drilling in Pre-drainage Coal Seam

作　　者：陆俊翔 罗文柯 王成龙[1] 黄妍 LU Junxiang;LUO Wenke;WANG Chenglong;HUANG Yan(School of Resources,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Hunan Key Laboratory of Coal Safety Mining Technology,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南科技大学资源环境与安全工程学院,湖南湘潭411201 [2]湖南科技大学煤炭安全开采技术湖南省重点实验室,湖南湘潭411201

出　　处：《矿业工程研究》2021年第3期48-53,共6页Mineral Engineering Research

基　　金：湖南省自然科学基金资助项目(2018JJ2123)。

摘　　要：预抽煤层瓦斯穿层钻孔有效影响半径是实施科学治理瓦斯的基础,以淮北集团邹庄煤矿煤层地质为研究背景,采用压降法对矿井四采区72和8_(2)煤层进行瓦斯穿层钻孔有效影响半径的测试,并利用Origin对穿层钻孔有效影响半径与抽采时间的变化关系进行分析,得出穿层钻孔有效影响半径与抽采时间的函数关系式.结果表明:预抽时间为1,2,3个月时,72煤层穿层钻孔有效影响半径分别为3.0,3.5和4.0 m,8_(2)煤层穿层钻孔有效影响半径分别为2.5,3.0和3.5 m.分别以4.0和3.5 m为邹庄煤矿72和8_(2)煤层穿层钻孔布置间距可有效防止煤与瓦斯突出事故,为煤层开采提供安全保障.The effective impact radius of gas penetration drilling in pre-drainage coal seam is the basis of scientific gas control.Based on the coal seam geology of Zouzhuang Coal Mine of Huaibei Group as the research background,this paper tests the effective impact radius of gas penetration drilling in coal seam 72 and 8_(2) in the fourth mining area of the mine by pressure drop method.Origin is used to analyze the relationship between the effective impact radius and the extraction time,and the functional relationship between the effective impact radius and the extraction time is obtained.Results show that when the pre-pumping time is 1,2,3 months,the effective impact radius of the borehole in the 72 coal seam is 3.0,3.5 and 4.0 m respectively,and the effective impact radius of the borehole in the 8_(2) coal seam is 2.5,3.0 and 3.5 m respectively.Taking 4.0 and 3.5 m respectively as the spacing of boreholes in 72 and 8_(2) coal seams of Zouzhuang Coal Mine can effectively prevent coal and gas outburst accidents,and provide safety guarantee for coal seam mining.

关 键 词：煤与瓦斯突出 瓦斯抽采 压降法 有效影响半径 邹庄煤矿 

分 类 号：X936[环境科学与工程—安全科学]