影响隧道超前预报探测距离的因素探讨

The analysis on factors to TSP detection range of the length in production practice

这里通过生产试验数据,分析了震源能量的大小、地质情况差异、以及声波噪音是如何影响地震波信号质量从而影响探测距离的。通过生产实践总结,提出了较有效地提高探测距离的办法。首先可通过生产试验确定炸药用量,使激发能量既不对支护造成伤害,又能达到较远的探测距离;地质情况通过影响采集数据长度影响探测距离,该因素是客观因素无法控制的;声波噪音是最难控制也是对探测距离影响较大的因素,可以根据声波能量和叠加到有效信号的时间,计算出不受声波干扰的预报距离,为评价预报结果提供参考依据。减小声波的影响可通过增加偏移距和压制声波能量的方法,压制声波能量可通过控制炮孔深度和倾角,炮孔的封堵,接收器的合理安装来实现。在实践中控制好声波噪音的影响,是提高探测距离的较为有效的途径。

In this paper, analysis of the impact from the length of the geological factors that forecast according to the production test data. These factors include the size of the source of energy, collected of the signal length under different geological condi tions , and acoustic noise on the signal. The larger energy of the source can make the seismic wave spread farther, but too much energy can support damage, so the source using the appropriate dose is very important, this factor can be resolved through the production test; geological conditions influence by affecting the length of the detection range of data collection. The factors are beyond the control of objective factors, but also affect the detection range; acoustic noise is the most important factor, but the most difficult to control. When the collected data after a certain time, added to the effective acoustic wave forming interfer ences, added to the effective signal based on sound waves of time can calculate fully credible forecast, another according to sound waves from the noise energy can calculate not believable forecast of paragraphs and completely unable to use to evaluate the forecast paragraphs forecast to provide the reference. Suppress acoustic energy through the control cannon hole depth and inclination, blast hole the sealing method, receiver installation method to implement. In the practice of control acoustic noise energy is a basic way to improve detection distance.