摘要
针对平煤某矿己15-24070(下)综放工作面瓦斯含量高、易超限影响安全生产的难题,采用COMSOL数值模拟软件建立三维抽采模型,结合固体力学、达西定律,研究了钻孔间距、钻孔直径对卸压范围和瓦斯压力衰减规律的影响,确定出合理抽采参数。在此基础上,提出己15-24070(下)综放工作面采用平行钻孔布置方式。现场实践表明:恰当布置钻孔间距、钻孔直径能够显著提高瓦斯抽采率,从卸压瓦斯抽采量角度考虑己15-24070(下)综放工作面钻孔间距3~5 m,直径0.1~0.133 m时,工作面顺层钻孔瓦斯抽采效率达到29%,抽采效果明显。
Aiming at the problem that the gas content in the F15-24070（ below） fully mechanized caving face of a mine in Pingmei was high and easy to exceed the limit,which influenced the work safety,a three-dimensional model of gas extraction was established by using the COMSOL numerical simulation software. Combined with the solid mechanics and Darcy＇s law,the influence of borehole spacing and borehole diameter on the pressure relief range and the gas pressure attenuation laws was studied,and the reasonable extraction parameters were determined. On this basis,it was proposed that the layout of parallel borehole should be adopted in the F15-24070（ below） fully mechanized caving face. The site application showed that the appropriate setting of borehole spacing and borehole diameter could significantly improve the gas extraction efficiency. Considering the pressure relief gas extraction quantity,the gas extraction efficiency in the bedding drilling of the working face reached 29% when the borehole spacing was 3-5 m and the borehole diameter was 0. 1-0. 133 m in the F15-24070（ below） fully mechanized caving face,and the gas extraction effect was obvious.
作者
齐庆杰
祁云
张建国
周新华
QI Qingjie;QI Yun;ZHANG Jianguo;ZHOU Xinhua(College of Safety Science and Engineering,Liaoning Technical University,Fuxin Liaoning 123000,China;Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education,Liaoning Technical University,Huludao Liaoning 125000,China;China Pingmei Shenma Energy ＆ Chemical Industry Group Co.,Ltd.,Pingdingshan Henan 467000,China;College of Architecture and Engineering,Liaoning Technical University,Fuxin Liaoning 123000,China)
出处
《中国安全生产科学技术》
CAS
CSCD
北大核心
2018年第6期76-83,共8页
Journal of Safety Science and Technology
基金
国家自然科学基金项目(51274113
51174109)
国家"十二五"科技支撑计划项目(2011ZX05041-003)
辽宁省教育厅科学研究一般项目(L2012124)
关键词
综放工作面
瓦斯抽采
钻孔间距
钻孔直径
抽采率
fully mechanized caving face
gas extraction
borehole spacing
borehole diameter
gas extraction efficiency
