Precise search observation method for form and evolutionary process of crack of coal-mine roof

Abstract

The invention discloses a precise search observation method for the form and the evolutionary process of cracks of a coal-mine roof. The precise search observation method comprises the following steps of: (1) using a geological drill to carry out roof drilling; (2) using a rock-stratum observation recorder to search a surface crack area; (3) using a double-end water plugging device to search deep cracks in the surface crack area; (4) analyzing data and determining the positions of the deep cracks; (5) installing a multi-point displacement meter on the positions of the deep cracks to observe crack evolution data; and (6) comprehensively analyzing data obtained by the double-end water plugging device, the rock-stratum observation recorder and the multi-point displacement meter, and then determining the distribution, the form and the evolutionary process of the cracks of the roof. The precise search observation method disclosed by the invention has the advantages that in the whole observation process, the observation cost is furthest saved, the positions of the cracks, the form of the cracks on the surface, the degree of the deep cracks and the complete data of the evolutionary process of the cracks are obtained, and the result is accurate.

Description

technical field [0001] The invention relates to the observation technology of the coal mine roof fissure shape and its evolution process, in particular to a searching observation method which comprehensively uses a geological drilling rig, a rock formation observation recorder, a double-end water blocking device and a multi-point displacement meter. Background technique [0002] Under normal circumstances, after the coal mining face is mined or the roadway is excavated, separation layers and cracks will be formed in the roof of the working face or the roof of the roadway. Understanding the crack shape and evolution process of the roof rock layer is the key to determine the reasonable support of the working face and roadway. Important basis for parameters. For working faces of buildings, railways (roads), and underwater coal mining, understanding the shape and evolution process of cracks in the roof strata is the basis for determining the reasonable mining parameters of the w...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the disadvantages of large observation consumption and rough observation results of the existing goaf roof fissure observation method, the present invention provides an observation method with low consumption and accurate results, which is a comprehensive use of geological drilling rigs and rock formation observation recorders. , double-ended water stopper and multi-point displacement meter search observation method

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