CO2致裂器深孔预裂煤体裂隙扩展范围试验研究

摘要

为了得出CO2致裂器串接进行深孔预裂的影响半径,在山西某煤矿3#煤层进行了2组试验,研究了在抽采区和未抽采区2种不同工况下深孔预裂的影响半径,并结合理论计算的结果进行了分析,结果表明,利用串接CO2致裂器进行深孔爆破,钻孔深度100 m的情况下,影响半径约5 m,为致裂增透方案的设计和现场施工提供了有力的技术支持.%In order to obtain the influence radius of deep-hole pre-eraeking by tandem type commection of carbon dioxide fracturing devices,two groups of experiments were carried out in No.3 coal seam of a coal mine in Shanxi province to study the influence radius under two different working conditions of extraction area and non-extraction area,and combined with the theoretical calculation,the results were analyzed.The results show that the influence radius is about 5 m when the drilling depth is 100 m through tandem type eommection of carbon dioxide fracturing devices.It provides a strong technical support for the fracturing and perme ability improvement design and field construction.