Study on Rayleigh Wave Detection for Distribution of Fractured Zone about Short Distance Anti-Procedure Mining Floor Strata
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.
anti-procedure mining rayleigh wave detection fissure distribution damage partition
ZHAO Tongbin XIAO Yaxun TAN Yunliang MA Chengfu LIU Pengcheng
College of Resources and Environmental Engineering,Shandong University of Science and Technology,Qin Muchengjian Mine,Beijing Haohua Energy Resource co.,LTD,Beijing 102304,China
国际会议
The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)
北京
英文
1633-1637
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）