CO_2致裂器深孔预裂煤体裂隙扩展范围试验研究  

Experimental Study on Fracture Extension Range of Deep Hole Pre-splitting Coal Body by Carbon Dioxide Fracturing Device

作　　者：王子雷[1,2] 

机构地区：[1]煤炭科学研究总院建井分院,北京100013 [2]煤矿深井建设技术国家工程试验室,北京100013

出　　处：《煤矿安全》2017年第6期24-27,共4页Safety in Coal Mines

基　　金：天地科技"科技创新基金"面上资助项目(KJ-2016-BJZM-09)

摘　　要：为了得出CO_2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CO_2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-eracking 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 theorelical ealcula- lion, the results were analyzed. The results show that the influence radius is abont 5 m when the drilling depth is 100 m through tandem type commection of carl）on dioxide fracturing devices. It provides a strong technical support for the fracturing and permeability improvement design and field construction.

关 键 词：CO2致裂器 深孔预裂 瓦斯抽采 裂隙扩展范围 影响半径 

分 类 号：TD712[矿业工程—矿井通风与安全]