A layered mining technology for layered mining of extra-thick coal seams
A layered mining and extra-thick coal seam technology, applied in special mining, surface mining, earthwork drilling and mining, etc., can solve the problems of complex laying process, high mining cost, and low recovery efficiency, so as to improve mining efficiency and reduce mining cost. The effect of cost and process simplification
Active Publication Date: 2019-08-20
CHINA SHENHUA ENERGY CO LTD +1
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[0029] The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings. Wherein the same components are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "inner" and "outer ” refer to directions towards or away from the geometric center of a particular part, respectively.
[0030] The layered mining technology for layered mining of extra-thick coal seams provided by the invention is mainly used for layered mining of extra-thick coal seams with a thickness of more than 8 meters, and can mine multi-layered layered coal seams.
[0031] The following is an example of two layered coal seam mining:
[0032] Such as figure 1 As shown, a layered mining process for layered mining of extra-thick coal seams provided by an embodiment of the present ...
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The invention discloses a layer mining technique for layer mining of a super thick coal seam. The layer mining technique comprises the following steps that (S001), the super thick coal seam is sequentially divided into layered coal seam bodies from top to bottom in advance; and (S002), all the layered coal seam bodies are sequentially mined according to the sequence from top to bottom, wherein when the upper-layer layered coal seam body in any two adjacent layered coal seam bodies is subjected to stoping, the bottom reserved coal seam portion with a reserved preset thickness is not subjected to stoping, and the bottom reserved coal seam portion serves as a coal seam top plate of the lower-layer layered coal seam body. According to the layer mining technique for layer mining of the super thick coal seam, man-made false roof construction is cancelled, the bottom reserved coal seam portion with the reserved preset thickness and of the upper-layer layered coal seam body directly serves as the coal seam top plate of a working surface in the lower-layer layered coal seam body, mesh placement does not need to be conducted as the prior art, the technique is simplified, mining cost is reduced, and mining efficiency is greatly improved.
Description
technical field [0001] The invention relates to the technical field of coal mining, in particular to a layered mining process for layered mining of extra-thick coal seams. Background technique [0002] Layer mining is a commonly used mining method for extra-thick coal seams. Underground mining coal seam thickness classification is generally divided into: thin coal seam, medium thick coal seam, thick coal seam and extra thick coal seam, among which, the thickness of thin coal seam is generally less than or equal to 1.3 meters; the thickness of medium thick coal seam is generally between 1.3 meters and 3.5 meters The thickness of a thick coal seam is generally greater than 3.5 meters; the thickness of an extra-thick coal seam refers to a coal seam whose thickness exceeds 8 meters. [0003] In the prior art, for the mining of extra-thick coal seams, artificial false roofs need to be constructed, that is, a layer of mesh is specially laid on the bottom plate as artificial false...
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IPC IPC(8): E21C41/18
Inventor 陈苏社杨俊哲刘民强高奎英李瑞群
Owner CHINA SHENHUA ENERGY CO LTD