【摘要】 阐述了煤层开采后顶板的分带特征,分析了冒裂带形成的时间规律,探讨冒裂带的确定方法主要是计算模拟法、类比法和现场实际测定法。计算模拟法主要包括经验公式法、物理模拟法、数值模拟法;类比法主要根据煤厚、分层层数、开采深度等建立相关关系进行比拟;实际测定法主要以电阻率、声波、电磁波、地震波等特征值差异以及钻孔电视、水文地质观测等实测数据为依据。文章为冒裂带高度的确定总结了可供选择的各种方法。更多还原

【Abstract】 The paper stated the zonation features of the roof after the mining of the seam and analyzed the formation time law of the roof falling and fractured zone.The paper discussed the methods to determine the roof falling and fractured zone,mainly including the calculation simulation method,the analogy and the site actual measuring method.The calculation simulation method would mainly be including the experience formula method,the physical simulation method and the numerical simulation method.The analogy would be compared mainly according to the related relationship established with the seam thickness,slice number;mining depth and others.The actual measurement would be based on the difference of the resistivity,sonic wave,electromagnetic wave,seismic wave and other feature value as well as the borehole TV,hydrological observation and site measured data as the basis.The paper summarized the different optional methods to determine the height of the roof falling and fracturing zone.更多还原