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All Journal Journals Mining Engineering : Bina Tambang
Mhd Hafiz Diska
Universitas Negeri Padang
Earth & Planetary Sciences

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Analisis Kestabilan Lubang Bukaan Dengan Pengujian Flat Jack Pada Dinding Tunnel 1 Tambang Bawah Tanah PT Allied Indo Coal Jaya, Sawahlunto Mhd Hafiz Diska; Murad Murad
Journals Mining Engineering : Bina Tambang Vol 5, No 2 (2020): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (908.648 KB) | DOI: 10.24036/bt.v5i2.107856

Abstract

Abstract. Geomechanical testing is very important in the mining industry, both open pit, and underground mining. Geomechanics testing aims to determine rock strength. Rock strength is a major determinant of slope stability in open mines or opening holes in underground mines. There are several geomechanical testing methods, based on their nature, geomechanical testing consists of non-destructive tests and destructive tests. Based on location, geomechanical testing consists of in situ tests and ex-situ tests. One example of in situ and non-destructive testing is flat jack testing. The flat jack method is a method based on the measurement of the pressure needed to restore the stress released. Flat Jack generates known stresses in rock mass. Flat jack testing is carried out on the underground mine wall to get the stress value. Based on the calculation of the safety factor of the underground mine of PT Allied Indo Coal Jaya, at location 1 the values of fk = 1.41 (tensile stress) and fk = 1.89 (compressive stress) are obtained. At location 2 the value of fk = 1.23 (tensile stress) and fk = 1.63 (compressive stress). At location 3 the value of fk = 1.23 (tensile stress) and fk = 1.63 (compressive stress).Keywords: Flat Jack, Geotechnical, Rock Stress, Safety Factor, Underground Mining.
Co-Authors Murad Murad