韩城矿区煤与瓦斯突出主控因素及突出区预测

Control factors of coal and gas outburst and regional prediction in Hancheng mining area,Shaanxi

通过大量地质调查与瓦斯地质特征的研究表明,影响韩城矿区煤与瓦斯突出的主控地质因素为煤层瓦斯含量、煤体结构类型及地质构造应力。文章确定了瓦斯突出预测的定量指标及临界值;提出了等性块段叠加法的概念。通过划分瓦斯等性块段、煤体结构等性块段与构造应力等性块段,建立块段突出危险类型评定原则与方案。运用等性块段叠加法,圈定并预测了3号煤层突出危险区,为矿井合理开展突出防治工作提供了科学依据。

Based on a series of geologic investigation and research on gas-geologic features,main geologic controlling factors influencing coal and gas outburst in Hancheng mining area are considered as gas content of coal-bed, structund fractured types of coalbody and sress of geological structures. The quantitative index and its critical value of predicting outbursts are established. The idea of the stacked method which based on same-geological conditions block are put forward.Through dividing the coal-bed into blocks with same-geological condition including gas content, coal-body structural type and geological structure stress, setting up the principle and scheme evaluated on the types of outburst danger, applying the stacked method which based on same-geological conditions blocks, the range of the outburst danger types of No.3 coalbed are predicted. It provides scientific basis for rational preventing and controlling gas-outbursts.