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Method for actually measuring and determining rapid coal caving parameters of extra-thick coal seam

A technology for extra-thick coal seams and deterministic methods, applied in earth square drilling, special mining, surface mining, etc., to achieve the effects of improving mining safety, improving operating efficiency, and reducing the amount of coal left

Active Publication Date: 2021-02-02
TIANDI SCI & TECH CO LTD
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  • Application Information

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Problems solved by technology

With the rapid development of top-coal caving mining technology in extra-thick coal seams, there are still several problems, mainly the economic problems of coal loss caused by the coal-caving technology of extra-thick coal seams and the safety problems of spontaneous combustion of coal left in goafs

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  • Method for actually measuring and determining rapid coal caving parameters of extra-thick coal seam
  • Method for actually measuring and determining rapid coal caving parameters of extra-thick coal seam
  • Method for actually measuring and determining rapid coal caving parameters of extra-thick coal seam

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Embodiment Construction

[0038] The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0039] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right" , "vertical", "horizontal", "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing this The embodiments and simplified descriptions of the invention do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as...

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Abstract

The invention relates to the technical field of coal mining, and particularly relates to a method for actually measuring and determining rapid coal caving parameters of an extra-thick coal seam. The method comprises the steps that S1, a multi-point displacement meter is arranged and observed in the trend direction; S2, trend top coal migration curves corresponding to different coal caving circulation step pitches are determined; S3, an inclined single-round sequential coal caving time curve is obtained; and S4, the rapid coal caving parameters of a large coal caving group, a medium coal cavinggroup, a small coal caving group and a micro coal caving group are determined. The top coal migration law is monitored by observing the on-site coal caving time and arranging the multi-point displacement meter, the method for actually measuring and determining the coal caving process parameters of the extra-thick coal seam is provided, a basis can be provided for reducing the coal resource loss,improving the stoping safety and determining the intelligent rapid coal caving parameters, and the operation efficiency and the coal face resource recovery rate are improved.

Description

technical field [0001] The invention relates to the field of coal mining technology, in particular to a method for actually measuring and determining parameters of rapid coal discharge in extra-thick coal seams. Background technique [0002] At present, my country's ultra-thick coal seam fully mechanized caving mining technology has developed into the stage of intelligent research and promotion and application. At present, there are many mines in ultra-thick coal seam fully mechanized caving mining, and the mining thickness is more than 16m, and some parts exceed 20m, achieving high yield and high efficiency. With the rapid development of top-coal caving mining technology in extra-thick coal seams, there are still several problems, mainly the economical problems of coal loss caused by the extra-thick coal seam caving technology and the safety problems of spontaneous combustion of leftover coal in goafs. In terms of economic issues, the recovery rate of fully mechanized cavin...

Claims

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Application Information

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IPC IPC(8): E21C41/18
CPCE21C41/18
Inventor 李正杰高峰周鹏张震陈万辉刘前进郭瑞高晓进韩伟海永夫
Owner TIANDI SCI & TECH CO LTD
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