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Application of ae for determining in situ stress at ug mine
Kramadibrata S.a, Wattimena R.K.a, Kamil I.a, Rai M.A.a, Widijanto E.b
a Department of Mining Engineering, Institut Teknologi Bandung, Indonesia
b PT. Freeport Indonesia, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© ISRM International Symposium – 5th Asian Rock Mechanics Symposium 2008, ARMS 2008. All rights reserved.The stability and safe operation of any underground excavations has been the prime concern of underground mine engineers. One of the most important parameters to obtain for underground mine planning is the in-situ principal stresses determination. The problems with the in-situ stress determination, particularly in Indonesia, so far have been associated with technology availability, cost efficiency and complexity in performing the in-situ test in remote regions. However, an indirect method with less cost to determine the in-situ principal stresses which is attributed to the use of Acoustic Emission (AE) method has been used by many and proven to be reliable as experienced at an underground gold mine in Indonesia. This paper therefore emphasizes on the technique development of AE test on 6 cored rock specimens retrieved from a reasonably large size core rock sample with different directions encompassing three-component principal stresses. The large size core rock sample had orientation of N58OE/-4O and was drilled from the AB Tunnel of the Underground copper mine of PT. Freeport Indonesia. Based on the stress level at which the Kaiser effects were detected the in-situ stresses at the AB tunnel was subsequently predicted as follows ó1 =41.4 MPa; ó2 = 18 MPa; δ3 = 3.1 MPa.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Core rock samples,Cost efficiency,Indirect methods,Principal stress,Technique development,Underground excavation,Underground mine,Underground mine planning[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]