煤层采后围岩破坏规律的声波CT探测

Sound-wave CT detection for failure patterns of surrounding rock after mining

论述了淮南孔集矿 - 2 50m水平西二、西四采区A组煤试采过程中 ,在地面与煤矿井下巷道之间 ,采用声波CT方法 ,根据不同岩石物理力学性质对声波波速传播的差异性原理 ,对煤层采后顶板破坏最大导水裂隙带高度和底板破坏深度等围岩变形破坏情况进行探测和解释 ,所得参数经钻探验证证实 .为煤矿的防治水和安全生产提供了科学的依据 .

Based on the difference in sound wave spreading velocity through rocks of different physico mechanics,Sound wave detection as well as the interpretation of the results, is made, during the trial extraction of Group A seam in West No 2 and West No 4 sections on -250 m level of Kongji Coal Mine in Huainan, of the behavior of the rock surrounding the seams after mining, such as the maximum water conducting fissure height of the roof and the failure depth of the floor. Verification is given by the subsequent explorations of the parameters obtained. This technique offers scientific basis for water prevention and harnessing and safe production in coal mines.