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首页> 外文会议>The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)论文集 >Study on Rayleigh Wave Detection for Distribution of Fractured Zone about Short Distance Anti-Procedure Mining Floor Strata
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Study on Rayleigh Wave Detection for Distribution of Fractured Zone about Short Distance Anti-Procedure Mining Floor Strata

机译：短距离反规采底板地层破裂带分布的瑞利波检测研究

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摘要

The damage degree analysis of floor strata is of great importance for the feasibility demonstration of anti-procedure mining and the safe mining. This paper takes Rayleigh wave detection technology' to analyze the fissure developmental condition of floor strata for seam No.3 with short distance anti-procedure mining practice for +570 m No.6 erossheading in Muchengjian mine in Beijing and gets the partition of damage degree and its space distribution of seam No.3 floor caused by the seam No.2 mining. The results indicate that the floor has some stratified interfaces because the seam No.3 floor is in the fractured zone caused by the seam No.2 mining and the layered number of overlying strata beside the boundary is more than the middle of goaf because of the developmental fractured zone of working boundary; The strata above the seam No.2 caving zone can be divided into weak layered zone and strong layered zone and the cracks of rock caused by the seam No.2 mining is developed espeeially between the position 19m and 7.8m of the seam No.3 floor; The medium sandstone stratum of the seam No.3 floor has large thickness, good integrality, few stratification and basic complete state, this section is the key horizon of stability for.the No.3 seam. The basic anastomosis between the layered results of Rayleigh wave detection reflects the reliability of Rayleigh wave detection for confirming the developmental condition for strata fissure by anti-proeedure mining. The application of Rayleigh wave detection shows that to research the stability of floor strata in the anti-procedure mining process by this detection method, the dilamination is behaved obviously on the detecting curve, the structure damage of strata and the fracture development are easy to recognize; and with the characteristic of high working speed and it is easy to use. On analysis of the results from Rayleigh wave detection, combined with the theory analysis, numerical simulation, floor drilling in the site and so on, the successful anti-procedure mining has already been got in the Muchengjiang mine.
机译：底板地层的破坏程度分析对于反程序开采和安全开采的可行性论证具有重要意义。本文采用瑞利波探测技术，对北京牟城jian煤矿+570 m 6号黑头短距离近程开采实践的3号煤层地层裂缝发育条件进行了分析，得出了破坏程度的分区。二号煤层开采引起的三号煤层底板及其空间分布。结果表明，该底板具有一定的分层界面，这是因为3号煤层处于2号煤层开采引起的裂缝带，边界层上覆地层的层数多于采空区的中部。工作边界的发育裂缝带; 2号煤层崩落带上方的地层可分为弱层带和强层带，由2号煤层开采引起的岩石裂缝特别是在3号煤层的19m和7.8m位置之间发展。地面;第三层煤层中层砂岩地层厚度大，整体性好，分层少，基本完整，是第三层煤层稳定的关键。瑞利波探测的分层结果之间的基本吻合反映了瑞利波探测在通过反程序采矿确定地层裂缝发育条件方面的可靠性。瑞利波检测的应用表明，通过这种检测方法研究反过程开采过程中地层的稳定性，在检测曲线上明显表现出分层，地层的结构破坏和裂缝发育易于识别。 ;具有工作速度快，使用方便的特点。在对瑞利波探测结果进行分析的基础上，结合理论分析，数值模拟，现场底板钻进等，在木城江矿区已经成功地进行了反过程开采。

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