水力压冲影响范围监测技术研究

水力压冲技术是针对低渗煤层瓦斯治理的有效手段之一。以水力压冲的基本原理为基础，通过分析新田煤矿现场情况，制订了水力压冲施工方案，建立了水力冲压影响范围监测流程，并通过监测视电阻率变化分析出该压冲钻孔的影响区域，推算出有效影响半径约20 m；压冲过程中的抽采钻孔出水点经验证与出水情况相吻合。结果表明，利用视电阻率监测水力压冲影响范围具有较高的精度。

Research on Monitoring Technology of Influence Range of Hydraulic Fracture and Flushing

The hydraulic fracturing and flushing is one of the effective means in the low permeability coal seam gas control. According to basic principle of hydraulic fracturing and flushing，through the analysis on site conditions of Xintian Coal Mine，the construction scheme of the hydraulic fracturing and flushing was formulated，monitoring process of influencing scope for hydraulic fracturing and flushing was established. By monitoring the variation of apparent resistivity，influencing areas of the drilling were analysed and calculated，the effective influence radius is about 20 m. The hydraulic fracturing and flushing in the process of borehole water point was verified，and it coincided with the actual situations. Results show that，it has high accuracy that monitoring the affected area of hydraulic fracturing and flushing with the apparent resistivity.