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Analysis method for stability of strip mine side slope in earthquake

An analysis method and technology for open pit mines, applied in seismic signal processing and other directions, which can solve problems such as parallel unintegration and inappropriate simulation.

Active Publication Date: 2014-04-16
HUOLINHE OPENCUT COAL IND CORP LTD OF INNER MOGOLIA
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  • Application Information

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Problems solved by technology

But in fact, within a certain depth of the free surface of the slope, a discontinuous medium is formed due to mining; the original geological conditions may also be broken rock mass; there may be parallel unconformities in the contact surfaces of different rock formations. Considering these factors, the continuum theory is used to carry out this study imitation is inappropriate

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  • Analysis method for stability of strip mine side slope in earthquake
  • Analysis method for stability of strip mine side slope in earthquake
  • Analysis method for stability of strip mine side slope in earthquake

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Embodiment 1

[0041] Haizhou Open-pit Coal Mine is located 3km southeast of Fuxin Station, in Taiping District, south of Fuxin City. The whole mine covers an area of ​​26.82 km 2 , of which, stope 6km 2 , 14.8km for dump site and gangue discharge plant 2 , Industrial Plaza 3.84km 2 , residential and living facilities 2.18km 2 . The maximum extent of the open-pit coalfield is W9+50m at the west end, E29+50 at the east end, 3.9km long from east to west; S5+00m at the south end, N13+00m at the north end, and 1.8km wide from north to south. The surface elevation is +165~+200m, with an average of +175m. The terrain is high in the southeast and low in the northwest. The design mining depth of the open-pit mine is 350 m.

[0042] A slope is 271m long horizontally (x-direction) and 157m high (z-direction). The geological conditions are complex. Sandstone, sandy mudstone, sandstone, coal seam, mudstone and sandy shale are distributed obliquely from top to bottom. The dip angle is about -15°....

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Abstract

The invention discloses an analysis method for stability of a strip mine side slope in an earthquake, and belongs to the technical field of mining safety engineering. A PFC3D is adopted for modeling, and the analysis method comprises the following steps of determining the radius of particles, determining the boundary of a model, building disconformity, building a side slope model, applying an earthquake and analyzing the simulation result, wherein the simulation process includes deformation of the inside structure of the strip mine side slope and the particle displacement vector inside the strip mine side slope. The analysis method for stability of the strip mine side slope in an earthquake is used for determining the deformation and stability of rocks of each part inside the side slope under different earthquake acceleration conditions.

Description

technical field [0001] The invention relates to the technical field of mining safety engineering, in particular to an analysis method for the stability of an open-pit mine slope in earthquakes. Background technique [0002] The open-pit mine slope has its own characteristics, which makes it different from the general natural slope. The free surface of the open-pit mine slope is originally below the surface in the natural state, but because it is exposed to the external environment due to artificial mining, no residual soil layer will be formed on the free surface, and due to the mining action, it is generally dominated by gravel accumulation. Main; natural slopes are often formed due to orogeny, attached to the mountain, and there are often faults in the direction of the slope structure facing the underground extension, while the open-pit mine slope is artificially mined, the free surface does not extend below the surface, and the bedrock under the slope It is still intact...

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Application Information

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IPC IPC(8): G01V1/30
Inventor 周玉祥李莹莹崔铁军宋子岭周玉民赵晓亮周扬罗根华
Owner HUOLINHE OPENCUT COAL IND CORP LTD OF INNER MOGOLIA