可拆卸定点取样装置在高突低透气性煤层中取样工艺优化研究  

Research on Optimization of Sampling Technology with Detachable Fixed-point Samplings Device in Coal Seam with High Outburst and Low Permeability

作　　者：李文彬 衡献伟 张玉柱 王超群 LI Wenbin;HENG Xianwei;ZHANG Yuzhu;WANG Chaoqun(Guizhou Coal Mine Design Research Institute Co.,Ltd.,Guiyang 550025,China;Guizhou Mine Safety Scientific Research Institute Co.,Ltd.,Guiyang 550025,China;College of Mining Engineering,Guizhou University,Guiyang 550025,China;China Coal Technology and Engineering Group Chongqing Research Institute,Chongqing 400039,China;Guizhou Faer Coal Industry Co.,Ltd.,Liupanshui 553017,China)

机构地区：[1]贵州省煤矿设计研究院有限公司,贵阳550025 [2]贵州省矿山安全科学研究院有限公司,贵阳550025 [3]贵州大学矿业学院,贵阳550025 [4]中煤科工集团重庆研究院有限公司,重庆400039 [5]贵州发耳煤业有限公司,贵州六盘水553017

出　　处：《煤炭技术》2022年第10期135-137,共3页Coal Technology

基　　金：贵州省省级科技计划项目资助(黔科合支撑[2022]一般005;黔科合支撑[2022]一般246)。

摘　　要：煤矿瓦斯治理过程中,瓦斯赋存情况能否准确掌握,直接影响着瓦斯防治效果。针对发耳煤矿高突低透气性煤层瓦斯赋存特点,引进优化改进后的可拆卸定点取样装置进行现场对比试验,以寻得适用13_(-2)^(#)煤层的最佳取样方式,保证取样的有效性,提高瓦斯含量测定的准确性。在同等条件下,通过改变取样钻孔倾角,发现上向孔取样效果优于下向孔,且取样钻孔倾角过大时,取样效果明显降低;在同等条件下,通过改变取样深度,发现随着取样深度的增加,取样效果逐渐降低,当取样深度大于100 m时,所取煤样不能有效保证瓦斯含量测定所需煤样。同时,为了保证可拆卸定点取样装置取样的最大效果,取样钻孔设计应考虑压风管风压、钻孔倾角和取样深度,取样过程中应保证钻杆-钻杆、钻杆-尾辫之间的密封性。In the process of coal mine gas control,whether the occurrence of gas can be accurately grasped directly affects the effect of gas control.In view of the gas occurrence characteristics of the high outburst and low permeability coal seams in Faer coal mine,an optimized and improved detachable fixed-point sampling device was introduced to conduct field comparison tests to find the best sampling method for the No.13_(-2)coal seam and ensure the effectiveness of sampling,Improve the accuracy of gas content determination.Under the same conditions,by changing the sampling hole inclination,it is found that the sampling effect of the upward hole is better than that of the downward hole,and when the sampling hole inclination is too large,the sampling effect is significantly reduced;under the same conditions,by changing the sampling depth,it is found that as the sampling depth increases,the sampling effect gradually decreases.When the sampling depth is greater than 100 m,the coal sample taken cannot effectively guarantee the coal sample required for gas content determination.At the same time,in order to ensure the maximum sampling effect of the detachable fixed-point sampling device,the design of the sampling borehole should consider the air pressure of the air pressure pipe,the inclination of the borehole and the sampling depth.The tightness between.

关 键 词：瓦斯防治 低透气性煤层 定点取样装置 瓦斯含量 

分 类 号：TD712[矿业工程—矿井通风与安全]