Time service system and method suitable for underground mining earthquake/digging earthquake

Abstract

The invention discloses a time service system and method suitable for an underground mining earthquake / digging earthquake. A ground system and an underground system are connected through the Ethernet to form the time service system; the ground system comprises a time service main clock and an upper computer which are arranged in parallel, and the time service main clock is also connected with a GPS antenna; the underground system comprises a plurality of optical transceivers, a plurality of time service secondary clocks and a plurality of groups of acquisition substations; the time service of the acquisition substations integrates Ethernet time service and 485 bus time service; the fused time service system main body adopts a protocol to ensure the sub-microsecond-level clock synchronization of all time service sub-clocks in the distributed network, so that the clock synchronization precision of all acquisition substations in the system is ensured. The acquisition substations acquire time information from the time service secondary clocks by using the 485 bus in a line synchronization manner, so that the hardware cost and the power consumption of the acquisition substations are greatly reduced; in addition, the acquisition substations acquire time information from the time service secondary clocks in a line synchronization mode, so that the hardware cost and the power consumption of the acquisition substations are greatly reduced.

Description

technical field [0001] The invention belongs to the field of geophysical exploration, and relates to a seismograph timing method, in particular to a timing system and method suitable for downhole mining / sequencing earthquakes. Background technique [0002] If the geological anomalies in front of the mining are not accurately detected in the coal mine mining stage, sometimes it will have an adverse effect on the safe and efficient production of the coal mine. The geological factors that affect the safe and efficient mining of the coal mine mainly include small faults, small folds, collapse columns, thinning of the coal seam and Fork and merger, magmatic rock intrusion, old empty area, etc. Therefore, it is the basis and premise to realize the safe and efficient mining of coal mines by ascertaining the geological structure ahead of underground mining in coal mines. Using the vibration signal generated by shearer and roadheader to cut the coal wall as the source of seismic whi...

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Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a timing system and method suitable for underground mining / sequence-drilling earthquakes, which solves the need for synchronous acquisition station equipment in the prior art and requires each one to be connected with one Time service slave clock, high cost and high power consumption technical problems

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