Cross-section coal uncovering accurate outburst elimination method for rock cross-cut

Abstract

The invention discloses a cross-section coal uncovering accurate outburst elimination method for a rock cross-cut. The method comprises the following steps that 1, drill sites are constructed on two sides of a coal uncovering position of a first rock cross-cut in an upper section, a plurality of bedding long drill holes are constructed, and the range of at least 12 meters outside two second rock cross-cut and third rock cross-cut roadway contour lines of coal to be uncovered in a lower section is controlled; 2, in the bedding long drill holes construction process, a directional drilling machine or a high-power and large-torque drilling machine is adopted to be matched with a drilling inclinometer to monitor the drilling track in real time, it is guaranteed that the constructed bedding longdrilling holes completely cover in the multiple cross-cut coal uncovering concentration gas pre-extraction area, and the gas treatment range is accurately controlled; and 3, after extraction reachesthe standard through construction of the bedding long drilled holes in the first rock cross-cut in the upper section, inspection is conducted on construction effect inspection holes when distance between driving working faces of second rock cross-cut and a third rock cross-cut in the lower section and normal line of a to-be-uncovered coal seam (4) is 7 meter, and if the residual gas content and the residual gas pressure are smaller than the specified requirements, it is confirmed that no outburst danger exists, and the second rock cross-cut and the third rock cross-cut in the lower section canbe used for directly uncovering coal.

Description

Technical field [0001] The present invention relates to a gas governance method, in particular to a high-grade mutual degree of coal, a mine gas governance technology, a mine gas governance technology. Background technique [0002] Coal mine gas is accompanied by accompanying gas during coal mining. The well-working moment of wellworking is facing the gas accident threat. my country is a country with the most serious disaster. The accident is close to 50%, and the mining conditions of the Southwest mining are especially complex. It is coal and gas. Highlight accidents, more than 80% of coal and gas outstanding accidents occur during stone door disclosure, have the characteristics of high outstanding intensity, serious accident hazard. [0003] Coal and gas highlighting is the factors such as ground stress, gas and coal's physical mechanical properties of gas and coal, and the instability of gas and stress can be released to extract a large amount of coal rock and gas to the minin...

AI Technical Summary

Problems solved by technology

During Shimen coal mining, the front of the working face was blocked by protected rock pillars and the gas in the coal was not fully released. It was in a state of stress concentration and high gas accumulation. The main reasons for the high outburst strength and serious damage in the process of uncovering coal

[0004] In the coal and gas outburst accidents, the main reason is that the outburst coal seam was accidentally exposed or the gas drainage in the area where the coal was exposed in Shimen was not up to standard, which seriously threatened the safe production of the mine.

At present, the regional outburst prevention measures for coal mining in Shimen are mainly based on the pre-extraction of gas in the coal mining area before coal mining in Shimen. As a regional outburst prevention measure, the construction of layer-penetrating drilling is a large amount of work, the construction period is long, and the excavation efficiency during Shimen coal mining is low. , it is difficult to achieve rapid excavation, which affects mine safety and rapid development

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