Mine earthquake source positioning method based on coal mine underground communication optical cable

Abstract

The invention relates to the technical field of mine earthquake source positioning, and discloses a mine earthquake source positioning method based on a coal mine underground communication optical cable, which comprises the following steps of: adopting the mine underground communication optical cable as a carrier, connecting one end of the communication optical cable with a laser on the ground, and connecting the other end of the communication optical cable with a wavelength division multiplexer, wherein one end of the wavelength division multiplexer is connected with a polarization measuring instrument; controlling a laser to emit an optical signal with a polarization state to a communication optical cable, and enabling a polarization measuring instrument at the other end of the communication optical cable to demodulate the received optical signal so as to obtain a peak value delta s1max of a first Stokes parameter s1 of all measuring points on the communication optical cable. According to the invention, the optical fiber polarization information is used for sensing, and the existing mining communication optical cable in the coal mine is innovatively used for replacing a special strain sensing optical cable which is expensive and difficult to lay, so that the problems of single arrangement position, small sensor coverage range, limited monitoring range and the like of the existing micro-seismic monitoring system in the coal mine can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of mine earthquake source positioning, in particular to a mining earthquake source positioning method based on underground communication optical cables in coal mines. Background technique [0002] As the country vigorously promotes the "Internet +" industry solutions and the construction boom of intelligent mines, more and more advanced intelligent equipment and devices are applied to coal mines to meet the ever-growing mine safety monitoring needs and solve coal mine problems. The existing monitoring system has problems such as poor disaster resistance, inconvenient installation, and small monitoring range, so as to improve the safety production and safety monitoring level of coal mines. Especially for the traditional mining earthquake monitoring system, the microseismic sensor probe and the data acquisition host are connected by wires, and generally only 8 to 12 channels of the same type of sensing data ca...

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Problems solved by technology

Existing mining earthquake monitoring equipment is expensive, complex in mechanism, and has few points in each mine, resulting in a small network coverage area and a large number of monitoring blind spots, making it difficult to monitor and locate in a timely and accurate manner and achieve effective early warning purposes. For this reason, We propose a mining earthquake source location method based on underground communication cables in coal mines

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