Automatic monitoring device and method for self-repairing condition of overlying strata mining-induced fissure

Abstract

The invention relates to an automatic monitoring device and method for the self-repairing condition of overlying strata mining-induced fractures, and relates to the technical field of mining and geological disaster monitoring. On one hand, the monitoring method provided by the invention comprises the following steps: determining a detection area, selecting radon gas measuring points, and respectively burying gas collectors at the corresponding radon gas measuring points; all the gas taking devices are in sealed connection with corresponding gas inlets in the electric gas pump, and a gas outlet of the electric gas pump is in sealed connection with the emanometer; measuring time is set on the radon measuring instrument, so that the electric air pump and the radon measuring instrument start to operate at the same time, and a corresponding air inlet is opened; the radon gas concentration at each radon gas measuring point is measured in sequence; and repeating the above steps to obtain the dynamic change process of the radon gas concentration at all the radon gas measuring points. The invention further provides a monitoring device. According to the monitoring device and method, automatic monitoring and data acquisition can be carried out on the dynamic development and the self-repairing process of the overlying strata mining-induced fracture, the monitoring area is large, and the labor cost is low.

Description

technical field [0001] The invention relates to the technical field of mining and geological disaster monitoring, in particular to an automatic monitoring device and method for self-repairing status of overburden mining cracks. Background technique [0002] Coal mines such as Ordos and Yulin in western my country generally have the characteristics of shallow buried depth, large mining height, thin bedrock, and large-scale high-intensity mining. bands and fissure bands. At the same time, the surface cracks induced by the development of fissure fields seriously threaten the fragile ecological environment of the surface and may cause damage to people's personal and property safety. Mining fractures in overlying rock are generally difficult to repair by manual means, but the self-repairing process will be completed slowly over time. [0003] At present, there is a lack of in-depth research on the dynamic process of overburden strata migration and fracture development at home an...

AI Technical Summary

Problems solved by technology

At the same time, the surface cracks induced by the development of fissure fields seriously threaten the fragile ecological environment of the surface and may cause damage to people's personal and property safety

Overburden mining fractures are generally difficult to repair by manual means, but will slowly complete the self-repair process over time

[0003] At present, there is a lack of in-depth research on the dynamic process of overburden strata migration and fracture development at home and abroad, but there are many static monitoring methods for mining fractures in overlying strata, mainly in engineering detection, including the use of drilling, ground penetrating radar, Ultrasonic imaging, high-density resistivity method, etc., these methods have certain defects, and it is difficult to truly reflect the change law of mining fractures in overburden rock under high-intensity mining conditions, mainly because:

[0004] 1. Direct measurement methods such as drilling will destroy the original overlying rock, and continuous observation cannot be carried out;

[0005] 2. Although ground-penetrating radar, ultrasonic imaging, high-density resistivity method and other methods can conduct continuous observation through non-contact measurement, the operation is complicated and data processing is difficult;

[0006] 3. The above methods all have the problems of high labor and equipment costs, and are only suitable for local observation

[0007] In addition, there is also a method of using radon gas to detect dynamic changes in overlying rock fractures, but this method requires manual operation, the process is relatively complicated, the labor cost is high, and human error will be added to the results

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