煤岩体水力压裂过程视电阻率响应实验  

Response Experiments of Coal and Rock Apparent Resistivity in Hydraulic Fracturing Process

作　　者：宋大钊[1,2] 邱黎明[1] 贾海珊 高萌[1] 赵振涛[1] 刘锰[1] 李西林[3] 

机构地区：[1]中国矿业大学安全工程学院,江苏徐州221116 [2]永城煤电集团有限责任公司技术与信息中心,河南永城450016 [3]中国矿业大学资源与地球科学学院,江苏徐州221116

出　　处：《煤矿安全》2015年第7期9-12,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51304205);中国博士后科学基金资助项目(2013M541982;2014T70678);中国矿业大学大学生创新训练计划资助项目

摘　　要：为了探索水力压裂半径的有效考察手段,进行了小尺度煤岩体水力压裂过程视电阻率响应实验。分析了水力压裂过程视电阻率响应原理,建立了水力压裂视电阻率响应实验系统,在此基础上,研究了水力压裂过程煤岩体视电阻率的响应特征规律。研究表明,由于压力水的参与以及煤岩体自身结构的破坏能够引起内部电流场分布状态的改变,引起了煤岩体视电阻率的变化;水力压裂实验中,煤岩体视电阻率具有较好的响应,水力压裂影响区域煤岩体视电阻率会出现显著变小的现象;视电阻率在空间上的分布不是均匀的,试样不同位置的视电阻率在时间上的演化也不是同步的,视电阻率的响应与煤岩体内部裂隙及压力水的分布及演化密切相关。In order to explore effective means of hydraulic fracturing radius,small- scale coal and rock apparent resistivity response experiments in hydraulic fracturing process are carried out. Firstly,the apparent resistivity response of hydraulic fracturing process is analyzed,then apparent resistivity response of hydraulic fracturing experimental system is established,on this basis,characteristics of coal and rock apparent resistivity response of hydraulic fracturing are studied. It shows that apparent resistivity in coal and rock is changed due to the pressure of the water involved in the destruction of rock and coal itself can cause changes in the internal structure of the current state of the field distribution; good apparent resistivity response could be found in coal and rock hydraulic fracturing experiments,apparent resistivity of areas that affected by coal and rock hydraulic fracturing appears significantly smaller phenomenon; apparent resistivity distribution in space is not uniform,the apparent resistivity response of the sample at different positions on the time evolution is not synchronized,and apparent resistivity response is closely related with the distribution and evolution of coal and rock internal fissures and pressure of the water.

关 键 词：煤岩 水力压裂 视电阻率 时空分布 煤与瓦斯突出 

分 类 号：TD713[矿业工程—矿井通风与安全]