Synchronous Leak Detection Method for Multi-stage Blocking in Floor Mining Destruction Zone

Abstract

The invention discloses a synchronous leak detection method for multi-stage blockage of a floor mining damage zone. The leak detection method includes the steps of drilling a downward borehole into the roof rock layer in a coal-rock roadway and cleaning the borehole; installing a detection system Steps, the test probe of the detection system is formed by connecting several detection units in sequence, and the adjacent detection units are detachably connected by a slot joint; the above-mentioned The step of sending the detection system to the initial position of the borehole; the step of closing the borehole with the plugging system; the step of sending the water source of a specific pressure to the water inlet pipe by using the water injection operation platform; the collected data is processed and analyzed to form the measurement The steps of the corresponding flow vector diagram of the segment, etc. The method of the invention can realize multi-segment and synchronous measurement of the mining damage zone of the bottom plate, and can appropriately increase the number of measurement segments for one measurement according to the length of the borehole, thereby reducing the workload exponentially and improving the measurement accuracy.

Description

technical field [0001] The invention belongs to the technical field of depth measurement of mining damage zones in mines, and in particular relates to a synchronous leak detection method for multi-stage plugging of floor mining damage zones. Background technique [0002] The measurement of the depth of the mining fracture zone in the mine floor is an important parameter to indicate the occurrence state of coal and rock. It is a key basic parameter in the study of mine water prevention and control. Therefore, in order to study the formation of water-conducting channels in mining surrounding rocks, it is necessary to grasp the law of rock movement and determine the height of the mining damage zone. Numerical simulation, empirical formula prediction, field measurement and other means. [0003] However, due to the complex site conditions, to a certain extent, the numerical simulation cannot reflect the site conditions well, and the blindness of the empirical formula is relative...

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Problems solved by technology

[0003] However, due to the complex site conditions, to a certain extent, the numerical simulation cannot reflect the site conditions well, and the blindness of the empirical formula is relatively large. As the mining depth increases, the applicability of the empirical formula becomes worse and worse.

When measuring in the field measurement, only one section can be measured each time, the measurement length of each section is about 1.5m, and the length of the drilling hole is about 30-50m, which causes the measuring equipment to move too many times in the drilling hole, due to the inclination angle of the drilling hole. Due to the error of the water head pressure and the defects of the equipment itself, the measurement section of the original measurement method cannot be too long each time, the number of measurement sections is small (usually 1 measurement section), the workload is large, the number of times the measurement equipment moves, and the measurement is not accurate, etc. question

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