综合物探方法在房采采空区勘查中的应用研究

Application and study of integrated geophysical prospecting in gob exploration of room-and-pillar system

针对单一物探方法在煤矿采空区探测中的局限性和多解性问题,结合陕北侏罗纪煤田地质及地球物理特性,综合运用瞬变电磁和可控源音频大地电磁法对普泉煤矿勘探区内浅埋房柱式采空区进行探测。综合探测成果对勘探区内3-1煤层采空区和采空积水区的位置、深度、范围等信息进行了推断解释,与地质资料和验证钻孔钻探成果基本吻合。研究结果表明:瞬变电磁和可控源音频大地电磁法相结合的方法在浅埋房柱式采空区探测方面具有较高的可靠性和准确性,能够为煤矿的安全生产和采空区的综合治理提供科学依据。

In order to solve the limitation and multiple solutions problems of single geophysical prospecting method in coal mine gob exploration, combined with the study on coal geology and geophysical characteristics of northern Shaanxi Jurassic coal field, shallow gobs of room-and-pillar system were explored by using transient electromagnetic method （TEM） and controlled source audio magnetotelluric method （CSAMT）. The location, depth, range and other information of gob and water logged area in 3-1 coal seam were inferred and interpreted, and the results basically matched with the geological data and hole drilling achieve- ment. The study results showed that the integrated methods of TEM and CSAMT bad great reliability and high accuracy in terms of shallow gob exploration of room-and-pillar system, which could provide a scientific basis for the safety production of coal mine and comprehensive treatment of gob.