煤层瓦斯资源量预测研究

Research of prediction of gas resource quantity in coal seam

  • 摘要: 利用VBA语言对AutoCAD进行二次开发,通过拓展数据功能实现对矿井瓦斯地质图中瓦斯抽采钻孔的钻孔初始瓦斯流量、钻孔瓦斯流量衰减系数和钻孔抽采起止日期等钻孔属性信息的赋值和查询,并根据钻孔初始瓦斯流量和百米钻孔瓦斯流量分别实现了块段内钻孔瓦斯抽采量的预测;在矿井瓦斯地质图的基础上,应用距离幂次反比法和瓦斯地质统计法实现了块段内瓦斯资源量、瓦斯剩余量的自动计算。实际应用结果表明,瓦斯资源量和钻孔瓦斯抽采量的预测误差为3.7%,预测结果为煤层瓦斯资源量和瓦斯抽采效果的评价提供了参考。

     

    Abstract: To use VBA language for AutoCAD secondary development and function of expand data, the paper realized assignment and query of borehole attribute information such as initial gas flow quantity of borehole, gas flow attenuation coefficient of borehole and start and end dates of borehole drainage of gas drainage borehole in mine gas geological map, and respectively realized prediction of borehole gas drainage quantity in block according to the initial gas flow quantity of borehole and gas flow quantity of hundred meters borehole. It applied inverse distance weighted method and gas geological statistics method to realize automatic calculation of gas resource quantity in block and its surplus based on the mine gas geological map. The actual application result shows that prediction error of the gas resource quantity and borehole gas drainage quantity is 3.7%, and prediction result provides reference for evaluation of the gas resource quantity and gas drainage effect.

     

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