摘要
为了探究不同因素对钻孔瓦斯抽采效果的影响,进行了试验矿区地应力现场测试,建立了煤体基质裂隙系统瓦斯运移理论模型;基于现场数据构建数值模型,研究不同抽采条件下的有效抽采半径变化规律;采用响应曲面法,分析不同因素的交互作用及对有效抽采半径的影响,得到各因素与有效抽采半径的响应曲面模型。结果表明:煤层初始渗透率对抽采半径的影响程度最大,抽采时间、抽采负压和钻孔孔径的影响程度依次变小;响应曲面模型显著性较好,决定系数为0.995 7;煤层初始渗透率与抽采时间的响应曲面扭曲程度最大,说明两者对抽采半径的交互影响显著;抽采时间与抽采负压的响应曲面扭曲程度最小,说明两者的交互影响作用最不显著。
In order to investigate influence of different factors on borehole gas drainage performance, in-situ stress field test in targeted mining area was carried out. The theoretical model of gas migration in coal matrix fracture system was established, and numerical model was constructed based on field data to simulate change of effective extraction radius under different extraction conditions. Response surface method was used to analyze effect of interaction of different factors on effective extraction radius.Response surface model between each factor and effective extraction radius was obtained. Results show that initial permeability of coal seam has the greatest influence on extraction radius, while the effect of drainage time, drainage negative pressure and borehole diameter decreases in turn. The response surface model has good significance, while the determination coefficient is 0.995 7.Response surface of coal seam initial permeability and extraction time has the largest distortion degree, which indicates that interaction effect of those two parameters on extraction radius is obvious. In contrast, response surface distortion of extraction time and extraction negative pressure is the smallest, indicating that the interaction effect of them is the least significant.
作者
龚选平
薛生
韩柏青
年福田
郑春山
成小雨
GONG Xuanping;XUE Sheng;HAN Baiqin;NIAN Futian;ZHENG Chunshan;CHENG Xiaoyu(China Coal Energy Research Institute Co.,Ltd.,Xi'an 710054,China;Institute of Energy,Hefei Comprehensive National Science Center(Anhui Energy Laboratory),Hefei 230031,China;School of Safety Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China;China Coal Xinji Energy Co.,Ltd.,Huainan 232000,China;China Coal Xinji Liuzhuang Mining Co.,Ltd.,Fuyang 236200,China)
出处
《煤矿安全》
CAS
北大核心
2022年第11期176-183,共8页
Safety in Coal Mines
基金
合肥综合性国家科学中心能源研究院(安徽省能源实验室)创新资助项目(21KZS218)
中煤能源研究院科技开发资助项目(ZMYHT*AJ-W-WSZNCC-02-21-090)
安徽高校协同创新资助项目(GXXT-2021-018)。
关键词
顺层钻孔
瓦斯抽采
有效抽采半径
煤层初始渗透率
响应曲面模型
bedding borehole
gas extraction
effective extraction radius
initial permeability of coal seam
response surface model
作者简介
龚选平(1979-),陕西宝鸡人,正高级工程师,硕士,主要从事矿井瓦斯防治方面的研究;通讯作者:薛生(1964-),山西祁县人,教授,博士,主要从事瓦斯治理与动力灾害防控方面的研究。
