A subsection prediction method for a fully mechanized mining hydraulic support load

Abstract

The invention discloses a segmented prediction method for a fully mechanized mining hydraulic support load. The method comprises the steps of collecting working parameters of a fully mechanized miningworking face hydraulic support within a period of time; drawing a relation curve of the hydraulic support load and the time according to the working parameters, and analyzing each coal mining cycle and the initial supporting force and the cycle end resistance corresponding to each coal mining cycle according to the relation curve; after the relation curve of the hydraulic support load and time corresponding to each coal mining cycle is subjected to fitting analysis, a spline curve of the coal mining cycle support load changing along with time is constructed; and establishing a data fitting window by taking the spline curve as data, fitting and comparing the bracket load data monitored in real time with the data in the data fitting window, calculating the load increase speed of the hydraulic bracket in real time, and further predicting the load of the hydraulic bracket. The method is not only an accurate and reliable hydraulic support load prediction method, but also can realize short-term prediction of the mine pressure.

Description

technical field [0001] The invention belongs to the technical field of coal mine mining, and in particular relates to a segmental prediction method for fully mechanized mining hydraulic support loads. Background technique [0002] The load of the hydraulic support is the direct reflection of the movement of the overlying rock in the fully mechanized mining face. After the coal seam is mined, the roof of the fully mechanized mining face breaks periodically, and the broken rock blocks are hinged to each other to form a temporarily stable structure, which bears part of the load of the overlying strata. When the structure loses stability, the load of the hydraulic supports increases rapidly due to the reduction of the bearing capacity, causing the cracks in the overlying strata to further expand upwards, and become channels for water and gas to flow out of the roof. Therefore, the abnormal change of hydraulic support load is an important precursor information of coal mine roof,...

AI Technical Summary

Problems solved by technology

However, due to the complex and changeable geological conditions of the coal mine, the speed of advancement of the fully mechanized mining face is different, and the support conditions are uneven, there is still no effective method for predicting the load of the hydraulic support. As a result, the existing data analysis is mainly used for pressure The research on mine pressure laws such as step distance, incoming pressure strength, and support coefficient, as well as the adaptability evaluation of hydraulic supports, mainly play the role of "wisdom after the fact".

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