顶板导水裂缝带多段封堵同步测漏系统与应用

Multistage Seal and Synchronizing System of Roof Water Flowing Fractured Zone and Its Application

针对工作面回采后覆岩导水裂缝带发育高度探测难题,为掌握地下开采引起的岩层移动规律和确定导水裂缝带高度参数,研制了顶板导水裂缝带多段封堵同步测漏系统,并详细介绍系统的主要结构、功能和操作步骤.该系统主要包括探测子系统、封堵子系统、供给子系统和推进子系统,实现了顶板钻孔多探测单元、任意角度、同步精准连续测量,且与普通注水系统相比,该系统中测试探头移动次数减少了2/3.以新宏煤矿21010工作面开采条件为工程背景,在理论预计和数值模拟的基础上,将该系统运用到实际工程中.顶板导水裂缝带高度理论预计结果为40.25m,数值模拟结果为36.87m,而现场实测结果为38.50m.结果表明系统测量结果准确,观测过程高效.顶板导水裂缝带多段封堵同步测漏系统的研制和应用,不仅成倍减少工作量,而且实现连续精准测量,丰富了导高现场观测手段,对预防矿井突水灾害具有重要的实用价值.

A multistage seal and synchronizing system of roof water flowing fractured zone is developed to master strata movement law caused by underground mining and to identify the height of fractured zone after working face mining. The structure, function and operation process of the system is introduced in this paper. It mainly consists of a detection subsystem, a seal subsystem, a supply subsystem and a propulsion subsystem. The goal of multi-detection units continously and sychronoisly measuring at any angel is achieved in this system; and the number of test probes movement is reduced by 2/3 in this system when compared with that in the traditional water injection system. Taking fractured zone＇s height observation in the 21010 working face of Xinhong coal mine as the background, on the basis of the theoretical prediction and numerical simulation, this system was applied in practical engineering. The result of the theoretical prediction and numerical simulation is respectively 40.25m and 36. 87m, and the measured height is 38.50m. The consistent between the measured height and the simulated height demonstrates that the new system is accurate and efficient. The development and application of the multistage seal and synchronizing system of roof water flowing fractured zone could not only greatly reduce the workload doubled but also achieve continuous and precise measurement. The system enriches the means of the observation of water flowing fractured zone and it also has important practical value to prevent mine water inrush disasters.