考虑卸压和抽采效果的水力冲孔布孔参数优化研究  

Research on boreholes space optimization of hydraulic flushing considering press relief and gas drainage effect

作　　者：郝富昌[1] 孙丽娟[2] 刘明举[1] 

机构地区：[1]河南理工大学煤炭安全生产河南省协同创新中心,河南焦作454000 [2]河南理工大学安全技术培训学院,河南焦作454000

出　　处：《采矿与安全工程学报》2014年第5期756-763,共8页Journal of Mining & Safety Engineering

基　　金：国家"十二五"科技支撑计划项目(2012BAK09B02-1);河南理工大学博士基金项目(B2013-001);河南省教育厅项目(13B440030)

摘　　要：为了提高水力冲孔技术的消突效果,建立了考虑煤的塑性软化、扩容特性和流变特性的钻孔周围煤体黏弹塑性模型,得到了不同冲煤量钻孔的卸压范围,建立了考虑渗透率动态变化和吸附特征的渗流-应力耦合模型,采用COMSOL软件对建立的耦合模型进行求解,研究了不同冲煤量钻孔的抽放半径,优化了水力冲孔布孔参数。结果表明:在确定水力冲孔布孔参数时,应综合分析水力冲孔的卸压范围和抽放半径,冲煤量为0.5,1.0和1.5 t/m时,卸压范围分别为3.71,4.61和5.8 m,抽放半径分别为3.5,4.3和5.0 m,义安矿平均冲煤量为1.0 t/m,由此确定水力冲孔布孔间距为8.0 m,区域措施效果检验和工作面预测数据表明,确定的布孔参数合理可靠。In order to improve outburst elimination of hydraulic flushing, the visco-elastic-plastic model of coal around boreholes considering plastic softening, dilatancy and rheological characteristic has been established, obtaining the parameter of relief ranges of different punching coal amount. At the same time the seepage-stress coupling model considering dynamic change of permeability and adsorp-tion characteristics has been established, and the coupling model has been solved by COMSOL software. Drainage radius of different punching coal amount have been studied, and the boreholes space of hy-draulic flushing coal has been optimized. The results show that relief range and drainage radius should be comprehensively analyzed in order to determine boreholes space of hydraulic flushing. When the punching coal amount is 0.5, 1.0 and 1.5 t/m, the relief range is 3.71, 4.61 and 5.8 m, and the drainage radius is 3.5, 4.3 and 5.0 m accordingly. Boreholes space of hydraulic flushing is determined to be 8.0 m because of the average punching coal amount of 1.0 t/m. The data of regional measures effect test and working face prediction show that the boreholes space is reasonable and reliable.

关 键 词：水力冲孔 多场耦合 布孔参数 应力场 渗流场 抽放半径 卸压范围 

分 类 号：TD713[矿业工程—矿井通风与安全]