A method for detecting the grouting quality of the weak floor of coal mine rock roadway
A quality inspection method and technology of the bottom plate, applied in the field of mines, can solve the problems of lack of standard inspection methods, etc., and achieve the effect of simple operation method and low cost
Active Publication Date: 2022-06-07
ANHUI UNIV OF SCI & TECH
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[0004] The purpose of the present invention is to overcome the problem of the lack of standards and corresponding detection methods in the control of floor grouting quality in the above-mentioned prior art, and provide a method for detecting the quality of grouting on weak floor of coal mine rock roadway
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[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0027] like Figures 1 to 2 As shown in the figure, a specific embodiment of the present invention provides a method for detecting the grouting quality of a soft floor of a coal mine rock roadway, comprising the following steps:
[0028] (a) Layout of inspection holes: 7 days after the completion of floor grouting, in the roadway section where floor grouting was performed in the early stage, randomly select 1 on the central axis 7 of ...
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The invention provides a method for detecting the grouting quality of the weak floor of coal mine rock roadway, which relates to the mine field; In the middle axis of the roadway floor and at the junction of the roadway side and bottom, one detection hole position is randomly selected; (b) drilling rig is fixed: a column-type pneumatic floor anchor cable drilling rig is arranged at the position of the detection hole, wherein, in the roadway floor The drilling rig at the axis is fixed vertically, and the drilling rig at the junction of the side and the bottom is fixed at an angle of 60° from the horizontal; (c) Quality inspection: When the drilling rig drills to the design depth of the inspection hole, according to the drilling depth and the corresponding real-time The slag discharge condition judges the grouting quality of the bottom plate. The method for detecting the grouting quality of the roadway bottom plate of the present invention has high detection speed, high precision, simple operation method and low cost.
Description
technical field [0001] The invention relates to the field of mines, in particular to a method for detecting the grouting quality of a soft floor of a coal mine rock roadway. Background technique [0002] For a long time, the problem of bottom sagging in soft rock tunnels of coal mines has always been an important problem restricting the safety and economic production of coal mines. Bottom sagging will not only lead to unevenness of the floor of the tunnel, but also accompanied by the substantial inward movement of the two sides of the tunnel and the crushing of the roof. The fundamental reason for the occurrence of bottom slump is the existence of the floor loose circle and floor water. Usually, a large amount of water accumulates in the floor loose circle of the roadway. The reduction of the body strength will inevitably lead to the further expansion of the loose circle of the floor, such a vicious circle will eventually lead to a substantial decrease or loss of the overall...
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IPC IPC(8): G01N33/38
CPCG01N33/383
Inventor 经纬郭瑞王旭
Owner ANHUI UNIV OF SCI & TECH