煤层注水防治冲击地压效果分析及可注性鉴定研究
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摘要
对煤样进行浸水实验和现场注水防冲效果检验,研究表明煤层注水降低了煤样冲击倾向性,现场钻屑量和电磁辐射强度均有较大程度的降低。为了准确鉴定煤层注水可注性,选取裂隙发育程度、孔隙率、湿润边角、坚固性系数、饱和水分增值以及埋深等6个注水难易程度的影响因子,以选自不同矿区的15个煤层实测数据为训练样本,建立了煤层注水可注性鉴定的距离判别模型,该模型回判正确率为100%。东荣二矿现场应用表明,距离判别模型鉴定结果与实际情况相符,可以用于指导现场煤层注水。
Laboratory research and field test showed that the consistent coefficient and uniaxial compressive strength of coal sample decreased with increasing time after the immersion test. And the drilling cuttings weight and electromagnetic radiation strength of coal seam with water injection decreased significantly on site. For judging the infusibility of coal seam infusion,six influencing factors including cranny viability,porosity,wet rim angle,firm coefficient,saturation moisture increment and buried depth were selected as evaluation indexes,and four discriminant functions were obtained through training 15 studying samples from different mining areas and the ratio of mistake-distinguish was zero after the distance discriminant analysis(DDA) model was trained. Coal seam of Dongrong No. 2 Coal Mine was used to verify this model. The results show that the DDA model is an effective method to judge the infusibility of coal seam infusion.
Laboratory research and field test showed that the consistent coefficient and uniaxial compressive strength of coal sample decreased with increasing time after the immersion test. And the drilling cuttings weight and electromagnetic radiation strength of coal seam with water injection decreased significantly on site. For judging the infusibility of coal seam infusion,six influencing factors including cranny viability,porosity,wet rim angle,firm coefficient,saturation moisture increment and buried depth were selected as evaluation indexes,and four discriminant functions were obtained through training 15 studying samples from different mining areas and the ratio of mistake-distinguish was zero after the distance discriminant analysis(DDA) model was trained. Coal seam of Dongrong No. 2 Coal Mine was used to verify this model. The results show that the DDA model is an effective method to judge the infusibility of coal seam infusion.
引文
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[2]李宗翔,潘一山,张智慧.预防冲击地压煤层掘进注水钻孔布置与参数的确定[J].煤炭学报,2004,29(6):684-688.
[3]刘士卫,李国营,潘俊锋,等.千米埋深煤层注水防治冲击矿压技术[J].煤矿开采,2011,16(5):76-77,85.
[4]郭兴明,刘振江.煤矿深部采区冲击矿压典型案例及防治探讨[J].煤炭技术,2017,36(4):177-179.
[5]秦书玉,秦威,赵景馥.煤层注水难易程度的BP神经网络评价法[J].中国地质灾害与防治学报,2006,17(3):87-90.
[6]吴宪,于贵生.煤层注水难易程度的模糊聚类分析及应用[J].煤矿安全,2014,45(6):159-162.
[7]邱进伟,刘泽功,戴广龙,等.煤体注水难易性评价的可拓物元模型与应用[J].中国安全生产科学技术,2014,10(7):141-146.
[8]邱进伟.基于核-灰度的煤层注水难易性评价方法[J].煤炭技术,2017,36(9):145-147.
[9]朱栋.长沟峪煤矿煤层注水防治冲击地压技术研究[D].徐州:中国矿业大学,2010.
[10]宫凤强,李夕兵.岩爆发生和烈度分级预测的距离判别方法及应用[J].岩石力学与工程学报,2007,26(5):1012-1018.
[11]卢国斌,李达,吴宪,等.东荣二矿煤层注水工艺优化及应用[J].辽宁工程技术大学学报(自然科学版),2016,35(8):797-803.
[12]任智敏,李孝胜.东荣二矿冲击地压发生机理及防控措施[J].煤炭技术,2011,30(6):122-124.