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首页> 外文会议>2013 Fourth International Conference on Digital Manufacturing and Automation >Study on Seismic Wave Propagation Characteristic of Deep-Hole Loose Blasting in Coal Mine
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Study on Seismic Wave Propagation Characteristic of Deep-Hole Loose Blasting in Coal Mine

机译：煤矿深孔松动爆破地震波传播特性研究

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摘要

According to the distribution of faults in coal face, deep-hole loose blasting scheme is formulated and vibration monitoring is conducted. Obtained seismic wave attenuation rule of deep-hole loose blasting, HHT method is adopted for vibration signal decomposition to research the characteristic of spectrum and the energy distribution of the signal. Research results show that seismic wave propagation characteristic of deep-hole loose blasting accords with hard rock spread rule in Safety Regulation for Blasting, the linear component of the ligature between survey point and explosion source is the largest in the three direction components of vibration velocity, which is resulted from the difference of energy loss between different kinds of seismic wave in propagation process, the duration of blasting vibration is about 150 ms, main energy is concentrated in the low-frequency area of less than 100 Hz, and energy can be divided into several "sub-bands" with frequency distribution. According to attenuation law, the biggest single shot charge of deep-hole loose blasting in the site can be calculated inversely, and measures for reducing blasting seismic hazard in construction are proposed, which would provide a reference for the construction.
机译：根据煤层断层的分布情况，制定了深孔疏松爆破方案，并进行了振动监测。根据深孔疏松爆破的地震波衰减规律，采用HHT方法对振动信号进行分解，研究信号的频谱特性和能量分布。研究结果表明，深孔疏松爆破的地震波传播特性符合《爆破安全条例》中的硬岩扩散规律，在振动速度的三个方向分量中，测量点与爆炸源之间的连字线性分量最大，这是由于传播过程中不同地震波之间的能量损失不同所致，爆破振动的持续时间约为150 ms，主能量集中在小于100 Hz的低频区域，并且可以对能量进行划分。分成几个具有频率分布的“子带”。根据衰减规律，可以反算出现场深孔疏松爆破的最大单次装药量，提出降低施工爆破地震危害的措施，为施工提供参考。

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