Determination of the block volume and the geological strength index (GSI) using photogrammetry approach in Golgohor iron mine of Sirjan

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Mollaei Emamzadeh Amin; Bahaaddini Mojtaba; Saeedi Golamreza; MOHAMMADI HAMID REZA

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Journal: IRANIAN JOURNAL OF MINING ENGINEERING (IRJME) Year:2019 | Volume:14 | Issue:42 Page(s): 47-57

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Title

Determination of the block volume and the geological strength index (GSI) using photogrammetry approach in Golgohor iron mine of Sirjan

Author(s)

Mollaei Emamzadeh Amin | Bahaaddini Mojtaba | Saeedi Golamreza | MOHAMMADI HAMID REZA | Issue Writer Certificate

Keywords

Photogrammetric methodQ1

discontinuitiesQ1

Discrete fracture methodQ1

Geological Strength indexQ1

Golgohar iron mineQ1

Abstract

The most common method for surveying discontinuities is the scanline method, which has the shortcomings of insufficient safety, number of measurements, and accuracy of measurement. Furthermore, determination of the block volumes generated by discontinuities and measurement of the Geological Strength index (GSI) are other issues in characterization of the rock mass mechanical properties. The Golgohar iron mine has encountered the above noted issues and the need for a sophisticated and accurate method for measuring discontinuities is inevitable due to the highly fractured walls in mine No. 1 with high risk of failure. . This paper aims to develop a new approach for measurement of the mean block volume, rock quality designation (RQD), and the Geological Strength index GSI of the rock masses. Thus, the geometric properties of discontinuities in the 14th bench of the Northwest wall in mine No. 1 were measured using the Photogrammetric method. To determine the geometric properties of the discontinuities on the slope face, control points were marked on the rock face and photos were taken from the rock surface. Then, using 3DM CalibCam, 3D point clouds and 3D photos were generated. The measurements were used to create a discrete fracture network (DFN) model. To generate the DFN model, FracMan software was used, which ultimately led to the determination of the mean block size, GSI, the mean spacing of each joint set, and the RQD of the rock mass. Results showed that the mean block volume is 0. 13 m3, and the GSI was measured to be 65. In order to investigate the ability of the proposed method in measuring RQD and GSI, results of twenty eight core logs from geotechnical boreholes were used. This investigation showed that the results of proposed model are in good agreement with the measured ones.

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APA: Copy

Mollaei Emamzadeh, Amin, Bahaaddini, Mojtaba, Saeedi, Golamreza, & MOHAMMADI, HAMID REZA. (2019). Determination of the block volume and the geological strength index (GSI) using photogrammetry approach in Golgohor iron mine of Sirjan. IRANIAN JOURNAL OF MINING ENGINEERING (IRJME), 14(42 ), 47-57. SID. https://sid.ir/paper/117077/en

Vancouver: Copy

Mollaei Emamzadeh Amin, Bahaaddini Mojtaba, Saeedi Golamreza, MOHAMMADI HAMID REZA. Determination of the block volume and the geological strength index (GSI) using photogrammetry approach in Golgohor iron mine of Sirjan. IRANIAN JOURNAL OF MINING ENGINEERING (IRJME)[Internet]. 2019;14(42 ):47-57. Available from: https://sid.ir/paper/117077/en

IEEE: Copy

Amin Mollaei Emamzadeh, Mojtaba Bahaaddini, Golamreza Saeedi, and HAMID REZA MOHAMMADI, “Determination of the block volume and the geological strength index (GSI) using photogrammetry approach in Golgohor iron mine of Sirjan,” IRANIAN JOURNAL OF MINING ENGINEERING (IRJME), vol. 14, no. 42 , pp. 47–57, 2019, [Online]. Available: https://sid.ir/paper/117077/en

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