A shallow-buried close-range room-and-pillar type goaf uplink mining rock stratum stability analysis method

Abstract

The invention discloses a shallow-buried close-range room and pillar type goaf uplink mining rock stratum stability analysis method, which is characterized by comprising the following steps of: 1, constructing a box girder bridge model; Step 2, determining basic parameters of the box girder; and 3, analyzing the stability of the box girder bridge according to the structural characteristics of thebox girder bridge, wherein the analysis comprises discrimination of the stability of a structural web of the box girder bridge and discrimination of the stability of a room column. According to an existing mechanical theory and a mine pressure theory, the shallow-buried close-range room column type goaf uplink mining system is subjected to mechanical analysis and research according to the box girder bridge structure model, and scientificity, practicability and rationality of determination of stability parameters of the shallow-buried close-range room column type goaf uplink mining system are ensured.

Description

technical field [0001] The invention belongs to the technical field of coal mine mining, and in particular relates to a method for analyzing the stability of rock strata in upward mining in a shallow-buried short-distance room-pillar goaf. Background technique [0002] Shallow coal seams are generally buried less than 150 meters deep. The characteristics of thin bedrock, shallow burial, and overlying thick loose layers make it difficult to form traditional theoretical cantilever beams and masonry structures in the mining process of close-distance coal seam groups. Stable load-bearing structures such as body beams and transfer rock beams. The existing research on the activity law of the overlying strata has done a lot of meaningful research on the overlying strata activity law through the combination of theoretical calculation and various monitoring methods, but the upward fully mechanized mining face in the room-and-pillar goaf However, there are few related studies on the ...

AI Technical Summary

Problems solved by technology

The existing research on the activity law of the overlying strata has done a lot of meaningful research on the overlying strata activity law through the combination of theoretical calculation and various monitoring methods, but the upward fully mechanized mining face in the room-and-pillar goaf However, there are few relevant studies on the influence of mine pressure appearance law on the stability of the entire mining system.

Due to the influence of the stability of the coal pillar and overlying rock during the upward mining of the room-and-pillar goaf, for the sake of safety, the length design of many fully mechanized mining faces in Shenfu mining area is only about 80m, and the length design of fully mechanized mining faces lacks safe and reasonable science. According to the basis, the relocation is too frequent, which increases the mining cost and the labor intensity of the staff, and consumes a lot of manpower, material resources and time

In addition, there are many coal pillars left, which reduces the resource recovery rate. A reliable and effective analysis method for the stability of upward mining rock formations in shallow buried and close-distance room-and-pillar goafs has become a major problem that needs to be solved urgently.

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