中南大学学报（自然科学版）2017，Vol.48Issue(10)：2808-2816,9.DOI:10.11817/j.issn.1672-7207.2017.08.034
底板采动破坏带分段观测系统与应用
Section observation system on floor mining damage zone and its application
摘要
Abstract
On the issue of the floor failure depth detection after working face mining, a section observation system on floor mining damage zone was developed to master the law of the floor rock failure caused by mining and to ensure safety of mining above the confined water. The structure, function and operation steps of the section observation system were introduced. This system mainly includes the leak-seal integration section, the supply and measurement section and the propulsion section. The maximum outer diameter of the test probe used is 78 mm, and its maximum effective measurement length for each propulsion is 4500 mm. The sealing pressure and leak pressure designed in working condition are respectively 2.5~2.6 MPa and 0.1 MPa. This system has the following characteristics: 1) The fusion of the system in leak section and plugging section can use the same external water source to make the sealing and observation work being completed, to achieve the integration of the function in sealing and leak detection, to reduce the number of pipes in the borehole to one and to solve the problem of winding the drill pipe; 2) The pressure converting terminal designed can realize the conversion of the blocking high pressure water source to the observation low pressure water source, which ensures that the plugging process and the observation process operate under respective pressures; 3) Compared with the double side seal-leak device of drilling, multiple observation units are adopted to realize multi section measurement with single plugging and can reduce the workload by 2/3. The accuracy and reliability of the system were verified by field measurement of the detection of the floor failure depth in the 41501 working face of Huafeng coal mine. By comparing the theoretical prediction and numerical simulation results, the results show that the theoretical predicted depth is 16.89-20.65 m, and the numerical simulated result is 15 m, and the measured depth in the section observation system is 15.49 m. The measurement results of the system are accurate. In the test process, there is no drill pipe winding phenomenon. The development and application of the section observation system on floor mining damage zone could enrich the field observation methods of the floor failure depth detection. For safe mining on confined water, it is of important practical value to prevent water inrush from floor.关键词
采动破坏带/分段观测/一体化系统/测试探头/经验公式/现场实测Key words
mining damage zone/section observation/integrated system/test probe/empirical formula/field measurement分类
矿业与冶金引用本文复制引用
刘伟韬,宋文成,穆殿瑞,赵吉园..底板采动破坏带分段观测系统与应用[J].中南大学学报（自然科学版）,2017,48(10):2808-2816,9.基金项目
国家自然科学基金资助项目(51274135) （51274135）
国家高技术研究发展计划(863计划)项目(2015AA016404-4) （863计划）
国家重点研发计划项目(2017YFC0804108)(Project(51274135) supported by the National Natural Science Foundation of China （2017YFC0804108）
Project(2015AA016404-4) supported by the National High Technology Research and Development Program (863 Program) of China （2015AA016404-4）
Project(2017YFC0804108) supported by the State Key Research and Development Program of China) （2017YFC0804108）
