Method for predicating mine pit slope deformation destroy induced by conversion from surface mining to underground mining

An open-pit-to-underground and prediction method technology is applied in the field of slope deformation and damage prediction induced by open-pit to underground mining, which can solve the problem of difficulty in simulating stability-instability-landslide-restabilization, and difficulty in adapting to discontinuous and large slope rock mass. Deformation, large displacement movement and damage, etc., to avoid casualties and property losses

Inactive Publication Date: 2015-04-08
ANSTEEL GRP MINING CO LTD
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Problems solved by technology

Previous studies mainly focused on the stability of the mine pit slope at a certain mining time. The numerical simulation analysis method for slope stability is difficult to adapt to the discontinuity, large deformation, large displacement movement and failure of the slope rock mass, and it is difficult to simulate the stability of the slope during mining. During the process, the cycle process of "stabilization-instability-landslide-restabilization" continues to occur in the pit slope

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  • Method for predicating mine pit slope deformation destroy induced by conversion from surface mining to underground mining
  • Method for predicating mine pit slope deformation destroy induced by conversion from surface mining to underground mining
  • Method for predicating mine pit slope deformation destroy induced by conversion from surface mining to underground mining

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Embodiment Construction

[0041] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings and examples.

[0042] Take the Qianyanshan Iron Mine as an example Figure 1-14 shown.

[0043] (1) Geology and Mining Background

[0044] Such as Figure 4 As shown, the Qianyanshan Iron Mine is located 5km northeast of the Qianshan Scenic Area in Anshan City, Liaoning Province. The Qianyanshan Iron Mine was first built in 1960 and was mined by open-pit methods. The open-pit mining was completed in September 2012, and the formed open-pit has a long east-west direction 1410m, 570m~710m wide in the north-south direction, the elevation of the closed circle is 93m, and the bottom elevation of the final open pit is -183m; The ore vein is located in the middle of the open pit, composed of three ore bodies, Fe1, Fe2 and Fe3. It strikes near east-west, tends to northeast or southwest, with a dip angle of 70°-88°, and is partially upright.

[0045...

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Abstract

The invention relates to a method for predicating mine pit slope deformation destroy induced by conversion from surface mining to underground mining. The method is characterized in that numerical simulation analysis software FLAC<3D> is adopted, a slope numerical analysis mode is built, the simulation processes of layer mining, numerical calculation and land sliding are cyclically used, the continuously generated processes of stabilization, stability losing, land sliding and re-stabilization of the mine pit slope in the mining process are simulated, and further, the slope deformation destroy rule in the underground mining process is obtained. The method has the advantages that the influence degree of the mining on neighboring buildings and facilities is judged according to the mine pit slope destroy predication result, basis is provided for determining the removal range and the removal time, and in addition, reference is provided for reasonably laying out ground facilities to be built in the aspects of production, office, life and the like.

Description

technical field [0001] The invention belongs to the technical field of mining, and in particular relates to a method for predicting the deformation and damage of pit side slope induced by open-pit to underground mining. Background technique [0002] my country is a country that uses open-pit mining for iron ore, and more than 90% of the self-produced iron ore comes from open-pit mining. After decades of mining, most open-pit mines have entered the middle and late stages. Since most of the large-scale iron ore deposits in my country are inclined or steeply inclined ore bodies, the burial depth is relatively large, and if the open-pit mining depth exceeds 300m-400m, if the open-pit mining is continued, it will be unreasonable economically, occupying more land, and causing more damage. Great ecological damage. Therefore, most open-pit iron ore mines will switch to underground mining after the end of open-pit mining. For example, mines such as Qianyanshan Iron Mine, Daye Iron ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q50/02
CPCG06Q10/04G06Q50/02
Inventor 邵安林裴学斌周仁杰马旭峰刘显峰姜科徐能雄刘京平
Owner ANSTEEL GRP MINING CO LTD
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