Long wall coal mining roof pressure hydraulic support resistance change characteristic pre-warning method
A hydraulic support and resistance variable technology, applied in mining equipment, mining equipment, earthwork drilling and other directions, can solve problems such as poor accuracy and poor real-time performance, and achieve the effect of preventing adverse effects, predicting in time, and ensuring life safety.
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[0027] Example one
[0028] The early warning method for the resistance change characteristics of the hydraulic support under the longwall mining roof of the coal mine uses the hydraulic support working resistance monitoring device, the pump station switch monitoring device and the hydraulic support resistance change index dynamic monitoring system for early warning; the hydraulic support working resistance monitoring The device is used to record and store the monitored working resistance of the working face hydraulic support and the corresponding time in real time, and can transmit the stored data to the hydraulic support resistance change index dynamic monitoring system; the pump station switch monitoring device is used to The monitored working face hydraulic support injecting the pump pressure to the end of time is recorded and stored, and the stored data can be transmitted to the hydraulic support resistance change index dynamic monitoring system; the hydraulic support resista...
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[0040] Example two
[0041] In this embodiment, the data recorded by each of the hydraulic support work resistance recorders are individually transmitted to the hydraulic support resistance change index dynamic monitoring system, and a resistance change index value is determined after numerical averaging.
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