ANALISIS KESTABILAN TUNNEL MENGGUNAKAN METODE ROCK TUNELLING QUALITY INDEX (Q-SYSTEM) DI PT. ALLIED INDO COAL JAYA, KOTA SAWAHLUNTO, SUMATERA BARAT.

JUENDA, PEBBY PUTRA and Setiawan, Budhi and Harnani, Harnani (2023) ANALISIS KESTABILAN TUNNEL MENGGUNAKAN METODE ROCK TUNELLING QUALITY INDEX (Q-SYSTEM) DI PT. ALLIED INDO COAL JAYA, KOTA SAWAHLUNTO, SUMATERA BARAT. Undergraduate thesis, Sriwijaya University.

	Text RAMA_34201_03071281823071.pdf - Accepted Version Restricted to Repository staff only Available under License Creative Commons Public Domain Dedication. Download (24MB) | Request a copy
	Text RAMA_34201_03071281823071_TURNITIN.pdf - Accepted Version Restricted to Repository staff only Available under License Creative Commons Public Domain Dedication. Download (15MB) | Request a copy
Preview	Text RAMA_34201_03071281823071_0012117205_0001028404_01_front_ref.pdf - Accepted Version Available under License Creative Commons Public Domain Dedication. Download (1MB) | Preview
	Text RAMA_34201_03071281823071_0012117205_0001028404_02.pdf - Accepted Version Restricted to Repository staff only Available under License Creative Commons Public Domain Dedication. Download (373kB) | Request a copy
	Text RAMA_34201_03071281823071_0012117205_0001028404_03.pdf - Accepted Version Restricted to Repository staff only Available under License Creative Commons Public Domain Dedication. Download (1MB) | Request a copy
	Text RAMA_34201_03071281823071_0012117205_0001028404_04.pdf - Accepted Version Restricted to Repository staff only Available under License Creative Commons Public Domain Dedication. Download (2MB) | Request a copy
	Text RAMA_34201_03071281823071_0012117205_0001028404_05.pdf - Accepted Version Restricted to Repository staff only Available under License Creative Commons Public Domain Dedication. Download (6MB) | Request a copy
	Text RAMA_34201_03071281823071_0012117205_0001028404_06.pdf - Accepted Version Restricted to Repository staff only Available under License Creative Commons Public Domain Dedication. Download (14kB) | Request a copy
	Text RAMA_34201_03071281823071_0012117205_0001028404_07_ref.pdf - Bibliography Restricted to Repository staff only Available under License Creative Commons Public Domain Dedication. Download (78kB) | Request a copy
	Text RAMA_34201_03071281823071_0012117205_0001028404_08_lamp.pdf - Accepted Version Restricted to Repository staff only Available under License Creative Commons Public Domain Dedication. Download (12MB) | Request a copy

Abstract

Research conducted at PT. Allied Indo Coal Jaya, City of Sawahlunto with open pit mining and underground mining. Underground mining is synonymous with subsidence risk caused by reduced soil carrying capacity due to excavation. The potential for instability around underground mine openings requires special handling, especially the issue of safety factors and buffer planning to ensure worker safety. The research focuses on analyzing the stability of underground mine openings using the Rockling Quality Index (Q-System) method. The research method used is a qualitative analysis method in the form of interpretation and quantitative analysis on joint data in the field and rock properties data in the laboratory. This research was conducted on the in Seam B with a total of 5 tunnels and seam C with a total of 4 tunnels. The data obtained is in the form of direct data from the field, namely joint data using the scanline method and sampling which is then analyzed in the laboratory. From the data obtained from the analysis results, Seam B Coal and Seam C Coal are classified as poor rock types, while sandstone and siltstone layers are classified as fair rock types. The maximum span value obtained at the study site which was measured according to the length of the 15 meter scanline was obtained for Seam B from 6-6.5 meters while Seam C was from 6-7.2 meters so that each had to be supported. In the identification of the supports without shotcrete, it was found that for the entire tunnel, rockbolts were installed 2.5 meters long with the distance between the rockbolts for each being 1.35 meters except for 2 1.37 meters, 6 1.34 meters, 9 1 .40 meters. The stress value (meanstress) after the support system has increased is in Seam B, which is 0.5-1. While the for the opening hole is by the equation, it is obtained that the value needs to be carried out so that the support system becomes stable (> 1.25) with the results on Seam B 7 from 0.84 to 1.46 (stable ), 1 from 0.83 to 1.43 (stable), 2 from 1.04 to 1.46 (stable), 5 from 1.04 to 1.46 (stable), 6 from 1.04 to 1.59 (stable) while in Seam C 3 from 0.84 to 1.63 (stable), 4 from 0.81 to 1.73 (stable), 9 from 1.4 to 2.25 ( stable), and Main Shaft from 1.27 to 1.89 (stable). Keywords : Q-System, Stability, Buffer, Tunnel, Strength Factor

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	Q-System, Kestabilan, Penyangga, Tunnel, Strength Factor
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA703-712 Engineering geology. Rock mechanics. Soil mechanics.Underground construction
Divisions:	03-Faculty of Engineering > 34201-Geological Engineering (S1)
Depositing User:	Pebby Putra Juenda
Date Deposited:	02 Feb 2023 04:26
Last Modified:	02 Feb 2023 04:26
URI:	http://repository.unsri.ac.id/id/eprint/89058

Actions (login required)

View Item