Comprehensive detection method for dynamic movement characteristics of overlying strata in site

A detection method and overlying rock technology, applied in nuclear radiation exploration, measurement devices, geophysical measurement, etc., can solve problems such as unreasonable combination selection and poor on-site detection effect, and achieve strong operability, wide practicability and Popularity and high efficiency

Active Publication Date: 2015-02-18
CHINA UNIV OF MINING & TECH
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Problems solved by technology

The existing method or combination of several methods is unreasonable, and will be affected by the specific mining geological conditions, resulting in poor on-site detection results. Therefore, it is urgent to invent a comprehensive detection method that can effectively grasp the dynamic activity characteristics of the overlying rock in the stope. method

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  • Comprehensive detection method for dynamic movement characteristics of overlying strata in site

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Embodiment Construction

[0017] An embodiment of the present invention will be further described below in conjunction with the accompanying drawings.

[0018] The comprehensive detection method for the dynamic activity characteristics of the overburden rock in the stope of the present invention delineates the detection area 1 corresponding to the overburden rock activity in the stope on the surface according to the mining geological conditions of the working face. In the delineated detection area 1, arrange a radon measuring line 2 at an interval of 10-20 m along the advancing direction perpendicular to the working face, and then arrange a radon measuring point 3 at an interval of 5-10 m on all the radon measuring lines 2. Put the probe cup 4 of the accumulative radon meter 5 upside down and bury it in the surface soil 30 cm below the radon gas measuring point 3, take out the probe cup 4 after an interval of 4 hours and quickly put it into the accumulative radon meter 5 for pulse counting and storage ...

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Abstract

The invention discloses a comprehensive detection method for dynamic movement characteristics of overlying strata in site. The method comprises the following steps: depending on underground working face conditions, delineating a detection region on earth surface; in the detection region, arranging measuring lines in a propelling direction perpendicular to the work face, and arranging measuring points on all measuring lines; inversely burying the detection cup of a radon detector in earth surface soil on the measuring points and carrying out pulse counting; driving a long driving hole towards roof strata on upper corner of the entitative coal side of work face return airway, and detecting movement status of overlying strata through a rock drilling detector; mounting a mineral digital pressure gauge on a hydraulic bracket of the work face, recording working resistance of the hydraulic bracket and collecting stored record results by virtue of a digital collector; after completing all detection work, uploading the detection results to a notebook computer respectively through a data line, and comprehensively comparing the detection results of the three methods, thus analyzing dynamic movement characteristics of overlying strata in site. The comprehensive detection method disclosed by the invention is strong in operability, high in efficiency, and broad in practicability and popularization.

Description

technical field [0001] The invention relates to a comprehensive detection method for the dynamic activity characteristics of the overlying rock in the stope, which belongs to the technical field of underground coal mining in mining engineering, in particular to a method for dynamic activity characteristics of the overlying rock in the stope of the underground longwall working face of the shallow buried coal seam in western my country. comprehensive detection method. Background technique [0002] Before the underground coal rock mass is excavated, its original rock stress is in a balanced state. When excavating roadways or coal seam mining, the original stress balance state of the coal and rock mass is destroyed, so that the internal stress of the coal and rock mass is redistributed until a new equilibrium state is formed. During this process, the coal and rock mass near the stope will be deformed and destroyed. Especially in the underground mining of modern coal mines, in o...

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Application Information

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IPC IPC(8): G01V5/00
Inventor 张炜张东升吴立新王旭锋吴阳阳王宏志张胜龙
Owner CHINA UNIV OF MINING & TECH
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