房柱式采空区高精度勘查技术

为解决常规勘查技术对煤矿房柱式采空区边界、开采具体参数、顶板及围岩稳定性等要素精度及能力不足的问题,对神府矿区房柱式采空区形成和赋存特征进行详细调研,然后利用地面电法精细成像技术圈定房柱式采空区分布范围,为首个钻孔提供靶区,指导钻探快速揭露采空区;再通过高精度孔中三维激光扫描技术,以连续追踪方式实现煤矿房柱式采空区精准勘查。本方法的优点是集成了地面及孔中探查技术的各自优势,通过地面物探精细成像技术指导钻探快速揭露房柱式采空区,采用高精度孔中扫描技术实现了房柱式采空区边界、开采具体参数、顶板及围岩稳定性、积水情况要素的高精度勘查;同时钻孔布设依据充分,没有无效工作量,节约了钻探工程量和钻探成本。

Precise exploration technology of room pillar goaf in Shenfu Mining Area

In order to solve the problem of insufficient precision and ability of conventional exploration technology on the boundary of room pillar goaf, specific mining parameters, roof and surrounding rock stability and other factors, in this paper, the formation and occurrence characteristics of room and pillar goaf in Shenfu Mining Area are investigated in detail, and then the distribution range of room and pillar goaf is delineated by using ground geophysical fine imaging technology, and the target area is provided by the first borehole to guide drilling to quickly expose the goaf. Through high-precision hole peeping and 3 D laser scanning technology, the accurate exploration of room pillar goaf in coal mine can be realized by continuous tracking. The advantage of this method is that it integrates the respective advantages of ground and borehole exploration technology through the surface geophysical fine imaging technology to guide drilling to quickly expose the room and pillar goaf, and the high-precision borehole scanning technology is used to realize the high-precision exploration of the room and pillar goaf boundary, specific mining parameters, roof and surrounding rock stability, and water accumulation conditions. At the same time, the drilling layout basis is sufficient, there is no invalid workload, saving the drilling quantity and drilling cost.