Zoning evaluation method for roof rock stratum structure of coal seam, mining area or working face

Abstract

The invention discloses a zoning evaluation method for a roof rock stratum structure of a coal seam, a mining area or a working face. The method comprises the following steps: determining an evaluation object and an evaluation area; determining the cumulative mining thickness of the mined coal seam, determining the caving zone and fissure zone development height of the mined coal seam, determiningthe cumulative thickness of the three-zone rock stratum, zoning, correcting the calculation result, determining the weak surface decline coefficient of the three-zone rock stratum and the complete rock stratum, calculating the roof rock stratum thickness characteristic parameters, and carrying out danger grade division, grading control, monitoring and prevention and control. According to the method, different coal seam inclination angles, coal mining processes, coal mining methods, coal seam group space positions and overlying strata 'three-zone 'distribution rules under overlying strata lithology are comprehensively considered; the method can realize zoning evaluation of the roof rock stratum structure of the coal seam, the mining area or the mining working face, is suitable for mines with rock burst risks, and can also be used for coal seams, mining areas or mining working faces with roof evaluation requirements.

Description

technical field [0001] The invention relates to a zonal evaluation method for the roof strata structure of coal seams, mining areas or working faces, which is suitable for mines with rock burst hazards and used to guide the evaluation of rock burst risks of coal seams, mining areas or mining working faces, Classification of rock burst types, monitoring and early warning of rock burst risks, and prevention and control of rock bursts can also be used for coal seams, mining areas or mining faces that require roof evaluation, and are used to guide the roof rock structure of coal seams, mining areas, or mining faces Evaluation, roof management and roof disaster prevention and control work. Background technique [0002] Roof disaster is one of the five major disasters in coal mines. Roof management and roof disaster prevention in coal seams, mining areas or working faces have always been the focus and difficulty of mine safety production. The breaking of the rock structure of the...

AI Technical Summary

Problems solved by technology

During the use, it was found that the evaluation results of these two types of evaluation methods are greatly affected by human factors, and the evaluation results of some mines are unreasonable, especially in the evaluation of special geological conditions such as inclined coal seams, steeply inclined coal seams, and non-first mining coal seams. When the coal seam, mining area or working face is under the coal seam, the above evaluation method does not consider the collapse shape of the overlying strata and the characteristics of the "three zones" strata, and still evaluates according to the roof stratum structure of the complete strata, which is prone to major mistakes. Misleading work of rock burst evaluation, monitoring, prevention and management

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