深层煤矿床的煤岩样物性测试结果与分析

The test results and its analysis of deep coal seam and rock sample

对深层煤矿床的钻探岩芯、井下样本进行了实地采集,并在实验室利用超声波技术对深层煤矿床进行了常规条件、加压、水饱和、高温等不同条件下的纵横波速度测试,结果表明:压力对煤岩样的超声波速度、波形和频谱有较大影响,加压使纵横波速度均有不同程度的提高,且纵波速度增幅值比横波快;水饱和也使纵横波速度值有所增大,但增加幅度没有压力显著;温度的变化对速度的影响不甚明显。

The seismic speed parameter is one of vital parameters for deep coal seam seismic exploration. There was little information about coal seam＇s velocity test from laboratory in the past time. The coal and rock samples from borehole and coal mining workface of deep coal bed were collected and the lab ultrasonic test was applied for compressional and shear wave velocity in various conditions, such as conventional condition, pressure, water saturation, high-- temperature etc. The test results showed that the impact of pressure on ultrasonic velocity, waveform and spectrum of coal and rock samples was most obvious, which made compressional and shear wave velocity increase greatly and the compression wave velocity value increased faster than that of shear wave. The water saturation also made compressional and shear wave velocity values increase in different degrees; the impact of temperature change to velocity was not sensitive.