NEMV技术在陈家山煤矿采空区探查中的应用

Application of NEMV technology in goaf exploration of Chenjiashan Coal Mine

陈家山煤矿主采侏罗系延安组4^(-2)煤层,矿井自然条件复杂,煤、油、气共存,水、火、瓦斯、煤尘、顶板灾害俱全。该矿东南边界浅部4^(-2)煤层露头线附近分布较多小煤窑,使煤矿安全生产存在安全隐患;同时由于该区域地表山高坡陡,植被茂密,无法采用传统勘探技术进行探测。在此背景下,使用基于应力-自然电磁脉冲的NEMV勘探技术对该区域进行勘探,该技术可采用无人机进行数据采集,不受地面条件影响,能够准确查明煤层赋存、地质构造形态,并对采空区、积水区等水文条件不清的区域进行精细探查。通过煤层应力系数平面图中异常区分布进行划分,在研究区内共发现该矿采空区2处,小煤窑盗采区2处,有效解决了煤矿开采中的实际问题。

Chenjiashan Coal Mine mainly mines 4^(-2) coal seams of the Yan’an Formation of the Jurassic system.The natural conditions of the mine are complex;coal,oil and gas coexist,and water,fire,gas,coal dust and roof disasters are all existed.There are many small coal kilns distributed near the shallow 4^(-2) coal seam outcrop line in the southeast boundary of the mine,and whether there is any cross-border behavior in historical mining,which has potential safety hazards to the safety production of the mine.At the same time,due to the steep slopes of the surface hills and dense vegetation in the area,which cannot be detected by traditional exploration techniques,the NEMV exploration technology based on stress-natural electromagnetic pulse was used to explore the area.UAV is adopted for data collection,which is not affected by ground conditions,and can accurately identify coal seam occurrence and geological structure patterns,and conduct fine exploration of areas with unclear hydrological conditions such as goaf areas and waterlogged areas.According to the distribution of abnormal areas in the plane diagram of coal seam stress coefficient,a total of 2 goafs and 2 small coal pits theft areas were found in the study area,which effectively solved the practical problems in coal mining.