基于瓦斯抽采定向钻孔的地质建模研究与应用  

Research and application of geological modeling based on gas extrac-tion directional drilling

作　　者：王新苗 Wang Xinmiao(Xi'an Research Institute(Group)Co.,Ltd.,Shaanxi Xi'an 710077,China;Xi'an Coal Science Transparent Geological Technology Co.,Ltd.,Xianyang,Shaanxi 712044,China)

机构地区：[1]中煤科工西安研究院(集团)有公司,陕西西安710077 [2]西安煤科透明地质科技有限公司,陕西咸阳712044

出　　处：《煤炭与化工》2024年第6期107-111,共5页Coal and Chemical Industry

摘　　要：针对瓦斯抽采定向钻孔揭露地质信息利用程度低的问题,以山西天地王坡煤矿三采区3号钻场为研究对象,开展了基于瓦斯抽采定向钻孔的地质建模研究及模型应用分析工作。结合矿井基础信息、钻孔密闭取芯气含量测试信息、定向钻孔轨迹和揭露岩性信息,构建了钻探区域高精度地质模型和瓦斯气含量模型。根据地质模型和瓦斯气含量模型,对钻孔施工质量、煤层空间起伏、巷道预想剖面和钻场残余瓦斯气含量展开了分析,结果表明:①6号钻孔轨迹基本在煤层中间,钻孔偏离煤层中轴线误差为0.31 m,施工质量较为良好;②钻探区域整体来看为一宽缓的单斜构造,局部存在1个小的向斜构造;③3号钻场经过近500 d的抽采,残余瓦斯含量为2507306.05 m^(3),平均瓦斯浓度预计为4.91 m^(3)/t。Aiming at the problem of low utilization of geological information revealed by gas drainage directional drilling,taking No.3 drilling field in No.3 mining area of Shanxi Tiandi Wangpo Coal Mine as the research object,the geological modeling research and model application analysis based on gas drainage directional drilling were carried out.The high-precision geological model and gas content model of the drilling area are constructed by combining the basic information of the mine,the test information of the sealed coring gas content of the borehole,the directional drilling trajectory and the exposed lithology information.According to the geological model and gas content model,the drilling construction quality,coal seam spatial fluctuation,roadway expected profile and residual gas content in drilling field are analyzed.The results show that:1)The trajectory of No.6 borehole is basically in the middle of the coal seam,and the deviation of the borehole from the central axis of the coal seam is 0.31 m,and the construction quality is good.2)The drilling area as a whole is a wide and gentle monoclinic structure,and there is a small syncline structure in the local area;3)After nearly 500 days of extraction,the residual gas content of No.3 drilling field is 2507306.05 m^(3),and the average gas concentration is expected to be 4.91 m^(3)/t.

关 键 词：地质建模 瓦斯抽采定向钻孔 模型分析 TIM-3D 残余瓦斯含量计算 

分 类 号：TD712[矿业工程—矿井通风与安全]