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Laboratory investigation to determine hole spacing into rock fracturing using non explosive demolition agent
Hutapea E.H.a, Simangunsong G.M.a, Widodo N.P.a
a Bandung Institute of Technology, Bandung, 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]© 2017 by Korean Society for Rock Mechanics.Non explosive demolition agent (NEDA) is material that can produces static expansive stress during its chemical reaction. It can be an alternative method to changing of blasting role as rock cutter in hard rock mine. The important parameter to determine hole spacing are static expansive pressure by NEDA, rock properties, and borehole diameter. A laboratory experimental were conduct to assess the pressure gain until the maximum expansive pressure by using electrical strain gauge and dial gauge with using some sample with three differences diameter (Ø) with same height (10cm). Then, NEDA were use in larger sample as the physical model test (25cm × 45 cm × 45 cm), to assess the length of rock fracturing and monitor the crack growth with time considering. In case of laboratory experimental to determine hole spacing, some empirical equation and physical model result were employed to do some preliminary experimental. The differences of hole diameters and spacing and static expansive pressures were analyzed. Hence, the result of preliminary test were developed by statistical analysis using polynomial regression method. Then, by employed RS3 code as numerical modeling based on 3D finite element method the developed equation will be compared and validated. The developed statistical models were shown a good fitting with Finite Element analysis. Hence, the developed models can be used with confidence to determine hole spacing into rock fracturing.[/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]3-D finite element method,Electrical strain gauges,Laboratory investigations,Non explosives,Physical model test,Polynomial regression,Rock fracturing,RS3 code[/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]3D finite element method,Non explosive demolition agents (NEDA),Rock fracturing,RS3 code[/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]