摘要
在煤层坚硬顶板开展水力压裂工程,已经逐渐成为了一种绿色安全且高效的矿震防治技术手段。为了更准确地评价水力压裂的实际效果,本文以东滩煤矿63上03工作面压裂监测为工程背景,首次采用地震频率谐振技术对压裂前后高位坚硬顶板的裂隙空间展布进行探测。应用结果显示,地震频率谐振技术对于水力压裂作业后形成的裂隙区,能够在解译剖面上呈现为明显的低波阻抗带,且通过网格化布设的探测廊带,也展示出了裂隙带的空间延伸方向,与该采区的最大水平主应力方向基本一致,同时通过比较低波阻抗带的数值差异,还可继续将其细分为具备导水功能的裂隙带和不具备导水功能的微裂隙带。本次工程应用表明,地震频率谐振技术证明了通过监测覆岩层内因产生裂隙带而导致波阻抗变化的技术可行性,是一种创新且有效的地球物理探测方法,本次研究成果可为类似条件矿井开展水力压裂进行矿震灾害防控提供参考。
Carrying out hydraulic fracturing engineering on the hard roof of coal seams has gradually become a green,safe and efficient technical means of mine tremors prevention and control.In order to evaluate actual effect of hydraulic fracturing more accurately,this paper uses seismic frequency resonance technology to detect the fracture space distribution of high hard roof before and after fracturing by taking the fracturing monitoring of the 63 upper 03 working face of Dongtan Coal Mine as the engineering background.The application results show that seismic frequency resonance technology can present an obvious low impedance zone on the interpretation section for the fracture zone formed after the hydraulic fracturing task, and the spatial extension direction of the fracture zone is shown through the gridded detection corridor, which is basically consistent with the maximum horizontal principal stress direction of the mining area. At the same time, by comparing the numerical differences of low-wave impedance bands, it can be further subdivided into fracture bands with water conduction function and microfracture bands without water conduction function. This engineering application shows that the seismic frequency resonance technology proves the technical feasibility of monitoring the wave impedance change caused by the fracture zone in the overlying layer, which is an innovative and effective geophysical detection method, and the research results can provide a reference for hydraulic fracturing in mines under similar conditions for mine seismic disaster prevention and control.
作者
王方方
田原
韩宁宁
薛爱民
王超
谢华东
李小瑞
王正茂
WANG Fangfang;TIAN Yuan;HAN Ningning;XUE Aimin;WANG Chao;XIE Huadong;LI Xiaorui;WANG Zhengmao(Yankuang Energy Group Company Limited.,Zoucheng 273500,China;Beijing Petrosound Geoservices Co.,Ltd.,Beijing 100085,China)
出处
《中国矿业》
2023年第12期100-106,共7页
China Mining Magazine
基金
山东省重大科技创新工程“深井矿震灾害防控关键技术及装备”项目资助(编号:2019SDZY0204)。
关键词
地震频率谐振技术
水力压裂
煤层顶板
裂缝带
煤矿工程
seismic frequency resonance technology
hydraulic fracturing
roof of coal seam
fracture zone
coal mine engineering
作者简介
第一作者:王方方(1988-),男,山东济宁人,中级工程师,主要从事煤矿安全高效开采、冲击地压防治等方面的工作,E-mail:445413270@qq.com;通讯作者:田原(1985-),女,湖北荆州人,硕士,中级工程师,主要从事地震资料处理与解释工作,E-mail:279566439@qq.com。
