底板采动破坏带分段观测系统与应用

发布时间：2018-05-19 10:34

本文选题：采动破坏带 + 分段观测　；参考：《中南大学学报(自然科学版)》2017年10期

【摘要】：针对工作面开采后底板采动破坏带探测难题,为掌握开采引起的底板岩层破坏规律,确保承压水上安全开采,自主研发底板采动破坏带分段观测系统。该系统主要包括测漏-封堵一体化子系统、供给-测定子系统和推进子系统等,采用的测试探头最大外径为78 mm,每次推进最大有效测量长度为4 500 mm,设计封堵工作压力为2.5~2.6 MPa,测漏工作压力为0.1 MPa。该系统具有如下特点:1)测漏系统和封堵系统融合,可利用同一外界水源进行封堵和观测工作,实现封堵测漏一体化,减少钻孔内管道数量为1根,解决了钻杆绕线问题;2)设计压力转换端子,实现封堵高压水源向观测低压水源转换,保证封堵过程和观测过程在各自压力下工作;3)采用多探测单元观测,实现一次封堵多段测量,与双端封堵测漏装置相比,可减少2/3工作量。用华丰煤矿41501工作面底板采动破坏带现场实测对该系统的准确性和可靠性进行验证,并与理论预计和数值模拟结果相对比。研究结果表明:理论预计值为16.89~20.65 m,数值模拟结果为15 m,而现场实测深度为15.49 m,系统测量结果是准确的,且测试过程未发生钻杆绕线现象。底板采动破坏带分段观测系统的研制和应用,丰富了底板岩层采动破坏范围现场观测手段,对于承压水上安全开采,预防底板突水具有重要的实用价值。
[Abstract]:In view of the difficult problem of detecting the floor mining failure zone after working face mining, in order to master the damage law of the floor strata caused by mining and to ensure safe mining on the pressurized water, we independently developed the sublevel observation system of the floor mining failure zone. The system mainly includes the integrated subsystem of leak detection and plugging, the subsystem of supply-measurement and the subsystem of propulsion, etc. The maximum external diameter of the test probe is 78 mm, the maximum effective measuring length of each propulsion is 4 500 mm, the working pressure of plugging is 2. 5 and 2. 6 MPa, and the working pressure of leak detection is 0. 1 MPA. The system has the following characteristics: 1: 1) the leakage detection system and the plugging system can be combined to use the same external water source for sealing and observation work, thus realizing the integration of plugging and leak detection and reducing the number of pipes in the borehole to one. The problem of drill pipe winding is solved. A pressure conversion terminal is designed to realize the conversion from high pressure water source to low pressure water source, and to ensure that the plugging process and observation process work under their respective pressures. Compared with the double end plugging and leak detection device, it can reduce the workload by 2 / 3. The accuracy and reliability of the system are verified by the field measurement of floor mining failure zone in 41501 working face of Huafeng Coal Mine, and compared with the theoretical prediction and numerical simulation results. The results show that the theoretical predicted value is 16.89 渭 m, the numerical simulation result is 15 m, and the measured depth is 15.49 m. The measured results of the system are accurate, and the drill pipe winding is not occurred during the testing process. The development and application of sublevel observation system for floor mining failure zone enriches the field observation methods for mining damage range of floor rock strata and has important practical value for safe mining and prevention of floor water inrush on confined water.
【作者单位】：山东科技大学矿业与安全工程学院;山东科技大学矿山灾害预防控制国家重点实验室(培育);
【基金】：国家自然科学基金资助项目(51274135) 国家高技术研究发展计划(863计划)项目(2015AA016404-4) 国家重点研发计划项目(2017YFC0804108)~~
【分类号】：TD745

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