【摘要】 提出了采用直流电阻率法监测煤层底板破碎带的演化规律,分析总结了底板破碎带的一般演化规律,建立了相应的地电模型,并采用共轭梯度算法,对煤层底板破碎带的地电响应特征进行了三维有限元数值模拟。模拟结果表明,采用电阻率法监测煤层底板破碎带的演化规律效果明显,尤其对横向电性结构的变化反映灵敏,能清晰地显示出破碎带在回采过程的演化情况,有利于煤矿底板突水实时监测和预报。更多还原

【Abstract】 In this paper,it put forward to the resistivity method to monitor the evolution law of coal seam floor fracture zone,analyzed and summarized the general evolution law of fracture zone,built the corresponding geoelectric model.By using the conjugate gradient method,it carried out 3D finite element numerical simulation for geoelectric response characteristics of coal seam floor fracture zone.The simulation results showed that the effect of using resistivity method to monitor the fracture zone was obvious,especially sensitive response to changes in the transverse electrical structure.The evolution situation of fracture zone could be shown clearly in the mining process and the method was helpful to the real-time monitoring and forecasting floor water invasion.更多还原