A Method for Measuring Pressure Relief Range of Protective Layer Mining with Multiple Borehole Information

Abstract

The invention discloses a multi-borehole information protecting layer mining pressure relief range actual measurement method which includes the steps: 1) drawing a protecting layer mining stereoscopic schematic diagram and drawing theoretical reference boundary lines in the protecting layer mining stereoscopic schematic diagram; 2) designing a special gas extraction lane and a drill site; 3) designing actual measurement boreholes; 4) constructing the actual measurement boreholes; 5) recording borehole information; 6) calibrating an actual measurement pressure relief range. Authenticity and objectivity of the influence range of protecting layer mining for protected layer pressure relief are fundamentally guaranteed, protecting layer mining actual pressure relief range can be acquired, pressure relief blind zones are avoided, and powerful technical support is provided for safe and efficient mining of a protected layer.

Description

technical field [0001] The invention belongs to the field of mine gas prevention and control, and in particular relates to a method for measuring the pressure relief range of protective layer mining with multi-drilling information. technical background [0002] The mining of protective layers is the preferred regional outburst prevention measure for the control of gas disasters in outburst mines. Although the "Regulations on the Prevention and Control of Coal and Gas Outbursts" provide a theoretical reference boundary line for the determination of the pressure relief range of the protected layer, it is required that the mining process of the protective layer In the first working face, the actual boundary line of the pressure relief range must be measured. In the past, due to the small amount of measured drilling information, it was difficult to obtain the real boundary line of the pressure relief range, especially in the strike length. On a long working face, there are often...

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Problems solved by technology

[0002] The mining of protective layers is the preferred regional outburst prevention measure for the control of gas disasters in outburst mines. Although the "Regulations on the Prevention and Control of Coal and Gas Outbursts" provide a theoretical reference boundary line for the determination of the pressure relief range of the protected layer, it is required that the mining process of the protective layer In the first working face, the actual boundary line of the pressure relief range must be measured. In the past, due to the small amount of measured drilling information, it was difficult to obtain the real boundary line of the pressure relief range, especially in the strike length. On a long working face, some pressure relief blind areas often appear and people mistakenly think that the pressure relief is completed. Although there is an investigation on the pressure relief effect, it is impossible to take into account each smaller area.

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