Method of clipping quadrilateral grids of coal seam by triangular grid of open-pit mine stope

A quadrilateral and triangular technology, which is applied in the field of triangular grid cutting of coal seam quadrilateral grids in open pit mines, can solve problems such as reducing efficiency and increasing storage capacity.

Inactive Publication Date: 2018-04-06
LIAONING TECHNICAL UNIVERSITY
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Problems solved by technology

However, since the quadrilateral mesh is a curved surface, the intersection line between it and the triangular surface is a space curve, which is difficult to realize in practical applications. The existing clipping method is to convert the quadrilateral mesh into a triangular mesh for processing, which increases the storage capacity volume, also reduces the efficiency

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  • Method of clipping quadrilateral grids of coal seam by triangular grid of open-pit mine stope
  • Method of clipping quadrilateral grids of coal seam by triangular grid of open-pit mine stope
  • Method of clipping quadrilateral grids of coal seam by triangular grid of open-pit mine stope

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Embodiment Construction

[0059] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0060] The embodiment of the present invention is as figure 1 The stope survey data of a certain open-pit coal mine shown as the data source of the stope surface model, with the position coordinates (x, y) of the borehole and the floor elevation z of the coal seam as the interpolation sample data of the coal seam interface, are realized by the method of the present invention The triangular mesh of the open pit stope is clipped to the quadrilateral mesh of the coal seam interface.

[0061] A method for clipping coal seam quadrilateral grids from triangular grids in open-pit mines, such as figure 2 shown, including the following steps:

[0062] Step 1: Generate a quadril...

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Abstract

The invention provides a method of clipping quadrilateral grids of a coal seam by a triangular grid of an open-pit mine stope, and relates to the technical field of coal seam geology. According to themethod, firstly, the quadrilateral grids of coal seam roof and floor interfaces and the triangular grid of the open-pit mine stope are generated; then intersecting-line polygons obtained by intersection of the triangular grid and the quadrilateral grids are generated, and sorted counterclockwise to obtain clipping polygons; and finally, the clipping polygons are used to clip the quadrilateral grids of the coal seam roof and floor interfaces to realize updating for a coal seam geology model. According to the method of clipping the quadrilateral grids of the coal seam by the triangular grid ofthe open-pit mine stope provided by the invention, the problem that intersecting lines of quadrilateral curved surfaces and triangular surfaces are space curves is effectively solved, and practical application is enabled to be realized. The method of directly utilizing the triangular grid to clip the quadrilateral grids highly efficiently realizes, on the premise of not increasing a storage amount, operations of clipping the quadrilateral grids by the triangular grid.

Description

technical field [0001] The invention relates to the technical field of coal seam geology, in particular to a method for cutting a coal seam quadrilateral mesh by a triangular mesh in an open-pit stope. Background technique [0002] Coal deposits are composed of a series of sedimentary rocks deposited continuously or intermittently in time, and are typical sedimentary deposits. The geological interface is formed by dividing regular grids within a specified range, taking exploration drilling data as samples, and interpolating. In addition to the rock contact surface in coal deposits, another important interface is the ground surface. Before the mine is mined, the ground surface refers to the original ground surface. After mining, because the original ground surface is destroyed by the mining project, at this time The ground surface is composed of undamaged original ground surface part and stope surface. There are two types of ground surface in open-pit mines: one is the natu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/20
CPCG06T17/205G06T2210/32
Inventor 陈应显康晓敏马江平
Owner LIAONING TECHNICAL UNIVERSITY
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