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Method for predicting distribution rule of ground surface fissures induced by underground mining of surface mine end slope

A technology for underground mining and surface fissures, which is applied in image data processing, instrumentation, electrical digital data processing, etc., and can solve problems such as short research history.

Active Publication Date: 2017-01-11
ANSTEEL GRP MINING CO LTD
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Problems solved by technology

Compared with coal mines, the research history of underground mining rock formations and surface movement in metal mines is relatively short and is still in the exploratory stage

Method used

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  • Method for predicting distribution rule of ground surface fissures induced by underground mining of surface mine end slope
  • Method for predicting distribution rule of ground surface fissures induced by underground mining of surface mine end slope
  • Method for predicting distribution rule of ground surface fissures induced by underground mining of surface mine end slope

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Embodiment Construction

[0049] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0050] Taking the underground mining at the east end of a certain open-pit iron mine as an example, the method of the present invention is implemented. In this open-pit iron mine area, three rock formations are mainly included:

[0051] (1) The northern part is carbonaceous phyllite rock formation. The rock mass in this rock group belongs to scattered block structure to fragmented structure; the structure is seriously affected, most of which are strongly weathered zones; it contains 3 groups of structural planes, with an average distance of 0.4-0.6m, mainly structural and weathered structural planes, and some There are muddy fillings, forming a scattered block structure or a fragmented structure.

[0052] (2) The middle part is banded magnetite quartzite interbedded schist rock group. This rock group is an iron ore layer (ore ...

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Abstract

The invention provides a method for predicting a distribution rule of ground surface fissures induced by underground mining of a surface mine end slope. The method comprises the following steps of collecting terrain and geology data of a surface iron mine; building an underground mining model of the surface iron mine end slope; determining the parameters of the underground mining model of the surface iron mine end slope; numerical simulation of underground mining: utilizing a three-dimensional discrete element method to calculate the numerical simulation of mining of the surface iron mine end slope, so as to obtain a rock layer and ground surface movement rule; predicting the ground surface fissures. The method has the advantages that the problem of predicting of ground surface fissures caused by the end slope mining from the surface iron mine into the underground mine is solved; a three-dimensional geology model of the rock body of the surface iron mine is established by a three-dimensional geology modeling method, and is divided into a discrete block model suitable for the 3DEC calculation; the distribution scope and type of the ground surface fissures in the underground mining process can be predicted, and the support is provided for the safety production of mines.

Description

technical field [0001] The invention belongs to the technical field of mining engineering, and in particular relates to a method for predicting the distribution law of cracks on the surface induced by underground mining at the side of an open-pit mine. Background technique [0002] The end-side ore body of an open-pit mine is an ore body located above the bottom of the pit and extends from the side slope to a certain distance outside the open-pit boundary. Generally, underground mining is carried out during the transition period from open-pit to underground mining. The mining of end-side ore bodies by segmental caving method without pillars will cause surface cracking and damage. The hazards caused by surface cracking and damage include: (1) Surface cracking will cause the destruction of ground facilities, such as: destroying the interception and drainage facilities of open-pit pits; (2) Surface cracking may cause personnel safety accidents. Therefore, it is very important ...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06T17/05G06Q50/02
CPCG06F30/23G06Q50/02G06T17/05
Inventor 邵安林裴学斌周仁杰刘显峰尹华光徐能雄刘京平
Owner ANSTEEL GRP MINING CO LTD
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