Extendable embedded type device for fixing and recovering microseismic sensor and method of using same

Abstract

The invention discloses an extendable embedded type device for fixing and recovering a microseismic sensor and method of using the same. The device comprises three parts of a protective cover, a connecting sleeve, an extendable supporting and fixing structure. The protective cover is composed of a fit cone, a fixing shaft and a cover wall with a mesh. Two ends of the connecting sleeve are respectively provided with internal and external threads. The extendable supporting and fixing structure is composed of a supporting shaft, a connecting ring, a "skeleton", a limit bolt, a limit groove, a supporting pipe, an elastic rod, an elastic cap with a baffle and an elastic shaft. The fit cone at one end of the protective cover is in close contact with coal. A microseismic sensor is located in the protective cover and fixed on the fixing shaft of the protective cover. The other end of the protective cover is connected with one end of the connecting sleeve through the internal thread. The other end of the connecting sleeve is connected with the supporting shaft of the fixing structure through the internal thread. The elastic cap with the baffle is screwed on, the elastic rod is supported tightly, and the supporting pipe is pushed to enable the "skeleton" to open so that the entire device is embedded, supported and fixed into the coal of a drilling hole. In the recovery, the elastic cap is screwed off, the supporting pipe is pulled to enable the "skeleton" structure to close, and the elastic rod, the connecting sleeve, the protective cover and the senor are removed in sequence.

Description

technical field [0001] The invention relates to the technology of installation, fixation and recovery of microseismic sensors, in particular to a device and method for using microseismic sensors for convenient support, fixed installation and recovery of underground drilling. Background technique [0002] my country is the largest coal-producing country in the world. Since 2011, my country's energy production and consumption structure has gradually changed, but the total amount of coal consumption has gradually increased. The development of the national economy still needs the strong support of coal resources. Relevant data show that the production and utilization of coal energy contribute about 15% and 18% to my country's GDP and increment respectively. By 2013, raw coal accounted for 75.6% of my country's total primary energy production and 66% of total primary energy consumption. It is expected that this proportion will remain above 50% by 2050, and the dominant position ...

AI Technical Summary

Problems solved by technology

The embedded installation mainly fixes the sensor through the coupling effect of the anchoring agent. This method can effectively monitor the microfracture activities inside the coal and rock mass, but the installation process is complicated and requires the cooperation of multiple people, which takes a long time. Holes, etc., will cause damage to the sensor, difficult or even impossible recovery; plug-in installation can achieve fast and convenient installation and recovery process, but the monitoring process is greatly affected by external interference signals

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