定向多分支长钻孔治理瓦斯技术体系研究及应用  

Research and application of the technical system for gas drainage by means of directional multi-branch drilling

作　　者：刘东 辛新平 马耕 LIU Dong;XIN Xinping;MA Geng(Research Institute of Henan Energy and Chemical Industry Group Co.,Ltd.,Zhengzhou 450046,China;Yongcheng Coal&Electricity Holding Group Co.,Ltd.,Yongcheng 470031,China;Guizhou Yuneng Investment Co.,Ltd.,Guiyang 550000,China)

机构地区：[1]河南能源化工集团研究总院有限公司,河南郑州450046 [2]永城煤电控股集团有限公司,河南永城470031 [3]贵州豫能投资有限公司,贵州贵阳550000

出　　处：《矿业安全与环保》2021年第5期108-112,共5页Mining Safety & Environmental Protection

摘　　要：为实现煤层瓦斯的高效率、低成本治理,对定向长钻孔"两堵一注"定点定长带压封孔测瓦斯压力技术方法进行了改进,研制了深孔定点密闭取样装置,优化了定向长钻孔强化抽采增产技术,进而形成了定向多分支长钻孔治理瓦斯技术体系。开展了现场工程试验,结果表明:在永夏矿区地质条件下定向多分支长钻孔成功施工深度达630 m以上,所研制的深孔定点密闭取样装置能够完成632 m钻孔的密封取样,密闭取样装置结构合理;实测试验区域煤层瓦斯含量、瓦斯涌出初速度、钻屑量结果一致性较好,测试结果可靠性满足要求;掘进过程中瓦斯涌出量与掘进速度呈明显的正相关关系,且瓦斯涌出量最大值位置与瓦斯含量、区域验证指标最大值区域位置一致,证明了定向多分支长钻孔治理瓦斯技术体系的可靠性。In order to realize high efficiency and low cost control of coal seam gas drainage,this paper proposes the technical system for gas drainage by means of directional multi-branch drilling.The fixed-point and fixed-size drilling sealing technology with pressure named"double sealing and one grouting"is improved to determinate coal seam gas pressure,and the airtight sampling device for fixed-point coal in the deep drilling is developed.In addition,the intensified techniques of gas drainage are optimized according to directional multi-branch drilling,then the technical system for gas drainage by means of directional multi-branch drilling is formed.The field engineering test results show that,the directional multi-branch drilling is successfully constructed with a depth of more than 630 m in Yongxia mining area,coal sample in the max depth of 632 m is fetched hermetically by the airtight sampling device,the structure of hermetically sampling device is reasonable;the results of the coal seam gas content,the initial emission rate and the drilling cutting agrees well with each other in position,the reliability of the test results meets the requirements;the gas emission rate is positively correlated with the tunneling speed,and the position of maximum gas emission rate is consistent with that of maximum gas content and regional verification indexes,which proves the reliability of the proposed technical system.

关 键 词：定向多分支钻孔 密闭取样 抽采评价技术 区域验证指标 瓦斯涌出量 

分 类 号：TD712.6[矿业工程—矿井通风与安全]