Quality evaluation method for project for treating Ordovician limestone water disaster under pushing and covering body through ground directional hole grouting

Abstract

The invention provides a quality evaluation method for a project for treating Ordovician limestone water disaster under a pushing and covering body through ground directional hole grouting. The quality of a project for treating Ordovician limestone water disaster under a huge thick pushing and covering body through ground directional hole grouting is comprehensively evaluated more systematically and comprehensively through the method. The method comprises steps: forming a first-level index layer according to the drilling plane spacing, the drilling encounter rate of the target layer and grouting verification; forming a second-level index layer through branch hole spacing, while-drilling track monitoring points, deviation of horizontal projection of a treatment area and a design track, coordinate deviation of a branch hole end hole point and a design point, rock debris logging identification and analysis, while-drilling gamma, the ratio of an actual drilling layer to a target layer, end hole pressure, the drilling fluid consumption condition of adjacent branches, a water pressing test after grouting, underground water dynamic analysis and grouting amount comparison verification, and determining the quantitative evaluation value of the quality of the Ordovician limestone water disaster project under the huge thick pushing and covering body treated through ground directional drilling and grouting.

Description

technical field [0001] The invention relates to the field of quality evaluation of mine bottom plate water damage control engineering, in particular to a method for evaluating the quality of an Austrian ash water damage project under a nappe by grouting ground directional holes. Background technique [0002] In view of the complex hydrogeology and thin water-resisting layer conditions of the underlying strata during the recovery process of the bottom coal formation, it is easy to occur the austrian limestone fractured confined aquifer formed by hidden fissures, faults and small collapse columns as water-filled channels. water inrush. In order to avoid floor water inrush during roadway excavation and coal seam recovery, and ensure safe production in coal mines, it is very important to choose reasonable coal seam floor water disaster prevention technology and measures, and the coal seam floor grouting prevention and control water technology through directional drilling on the ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the project quality evaluation method of ground directional drilling and grouting to control the Austrian ash water disaster under the huge thick nappe has insufficient quality of the project in the prior art, the present invention provides a ground directional hole grouting control project for the Austrian ash water disaster under the nappe Quality evaluation method, which combines AHP and gray comprehensive evaluation method and considers the ambiguity of evaluation indicators, effectively and systematically controls the Austrian ash water disaster project under the huge thick nappe by directional drilling and grouting on the ground The quality was fully evaluated

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