A Method for Determining the Movement Angle of Coal Mine Rock

Abstract

The invention discloses a method for determining the moving angle of a coal mine rock layer, which comprises a plurality of microseismic geophones arranged in a coal mining face in a staggered manner, each microseismic geophone is connected with a data collection and monitoring station, and the multiple data collection and monitoring stations are connected through an optical fiber Form a complete monitoring network and connect to the ground server. According to the number of microseismic events on the roof of the coal mine working face and the distribution law of the energy released by microseisms along the direction of the working face, the ground server determines the leading impact distance l of the working face and the thickness of the roof rock layer h Obtain the moving angle θ of rock stratum activity, the method of the present invention is reasonable in design, simple and convenient in calculation, effectively reduces the loss of surface structures caused by coal mining, ensures safe production in mines, promotes economic development and social stability in mining areas, and has great economic value and Social Significance.

Description

【Technical field】 [0001] The invention belongs to the technical fields of coal mine safety production and mining engineering, and in particular relates to a method for determining the movement angle of a coal mine rock formation. 【Background technique】 [0002] At present, the rock movement and surface subsidence caused by underground mining are very serious underground engineering problems. During the underground mining process, the stress balance of the original rock is destroyed, and the surrounding rock deforms, moves, and even moves in a large area. With the increase of mining depth, the ore is continuously extracted, and the deformation, movement and destruction of surrounding rocks are gradually intensified. However, in some mines in my country, due to the unreasonable movement angle of the rock formation determined during the mining process, the buildings and production facilities on the surface are located in the movement area and are damaged, which not only poses a...

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Problems solved by technology

Among them, the on-site monitoring method needs to arrange a large number of measurement points, which is costly and takes a long time to monitor; the theoretical analysis method is difficult to establish a set of theoretical models and methods that match the actual situation on the spot due to the complexity of the on-site conditions; the physical simulation method is often On the basis of the field conditions, a lot of simplifications are made to the field conditions, resulting in a large difference between the results of the physical simulation method and the field monitoring results; the numerical analysis method is often limited by the analytical method and constitutive equation used, and the The selection of rock mass parameters in the analysis method is also very difficult, so the results of the numerical simulation method are difficult to correspond to the field

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