EVALUASI DAN OPTIMASI CROSS SLOPE JALAN ANGKUT TAMBANG, SETTLING POND DAN WETLAND PADA SISTEM PENYALIRAN TAMBANG BATU GAMPING DI PT SEMEN PADANG, KOTA PADANG, PROVINSI SUMATERA BARAT

PRADITA, YAZID SYIHABUDIN (2023) EVALUASI DAN OPTIMASI CROSS SLOPE JALAN ANGKUT TAMBANG, SETTLING POND DAN WETLAND PADA SISTEM PENYALIRAN TAMBANG BATU GAMPING DI PT SEMEN PADANG, KOTA PADANG, PROVINSI SUMATERA BARAT. Other thesis, UPN "Veteran" Yogyajarta.

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Abstract

RINGKASAN
Penelitian dilakukan di lokasi penambangan batu gamping PT Semen Padang
Indarung, Kecamatan Lubuk Kilangan, Kota Padang, Provinsi Sumatera Barat.
Dalam sistem tambang terbuka yang berhubungan langsung dengan udara, kondisi
cuaca sangat berpengaruh dalam keberlangsungan kegiatan penambangan. Air
hujan akan berpotensi mengganggu kegiatan penambangan khususnya di lokasi
penambangan PT Semen Padang. Terdapat genangan air pada jalan angkut
tambang, hal tersebut dikarenakan tidak adanya cross slope sehingga air tidak dapat
mengalir ke saluran terbuka. Hasil perhitungan dimensi kolam pengendapan dan
wetland belum mampu menampung debit maksimum, apabila terjadi curah hujan
maksimal. Oleh karena itu perlu dilakukan evaluasi dan optimasi terkait cross slope
jalan angkut, dimensi kolam pengendapan dan wetland.
Penelitian dilakukan dengan melakukan studi literatur, setelah itu dilanjutkan
dengan pengambilan data di lokasi penambangan batu gamping PT Semen Padang.
Pengambilan data meliputi data primer dan data sekunder. Data primer berupa
dimensi saluran terbuka dan gorong-gorong, dimensi kolam pengendapan,
sedangkan data sekunder berupa data curah hujan dan peta topografi. Pengolahan
data meliputi curah hujan rencana, debit air limpasan, perhitngan dimensi saluran
terbukan, kebutuhan luas kolam pengendapan.
Hasil pengolahan data diperoleh curah hujan rencana 165,32 mm/hari,
intensitas hujan sebesar 31,11 mm/jam dengan waktu konstan 2,5 jam. Luas daerah
tangkapan hujan dibagi menjadi 7 bagian dengan luas total 4,081 km2 dan debit air
limpasan sebesar 24,74 m3/detik.
Terdapat 3 saluran tebuka utama dimana masing-masing saluran terbuka
sudah mampu menampung debit air yang ada disekitar. Terdapat 3 zona kolam
pengendapan yaitu zona barat, zona tengah, dan zona timur, berdasarkan hasil
perhitungan ketiga zona kolam pengendapan belum mampu menampung seluruh
debit yang mengalir. Kolam pengendapan yang dibutuhkan yaitu zona Barat sebesar
14.400 m2, zona Tengah sebesar 14.250 m2, zona Timur sebesar 15.600 m2. Untuk
waktu pengerukan kolam pengendapan rata-rata 4 tahun sekali.
SUMMARY
The research was conducted at the limestone mining site of PT Semen Padang
Indarung, Lubuk Kilangan District, Padang City, West Sumatra Province. In an open-pit
mining system that is directly related to the air, weather conditions are very influential in
the continuity of mining activities. Rainwater will potentially disrupt mining activities,
especially at the PT Semen Padang mining site. There is a puddle of water on the mine haul
road, this is because there is no cross slope so that water cannot flow in the open channel.
From the calculation of the dimensions of the settling pond and wetland, it has not been
able to accommodate the maximum discharge, in the event of maximum rainfall. Therefore,
it is necessary to evaluate and optimize the haul road cross slope, settling pond and wetland
dimensions.
The research began with a literature study, then continued with data collection at
the PT Semen Padang limestone mining site. Data collection includes primary data and
secondary data. Primary data in the form of topgraphic conditions, dimensions of open
channels and culverts, dimensions of settling ponds, while secondary data in the form of
rainfall data and topographic maps. Data processing includes rainfall plans, runoff water
discharge, open channel and culvert dimensions, settling pond area requirements.
From the results of data processing obtained rainfall plan 165,32 mm / day, rain
intensity of 31,11 mm / hour with a constant time of 1 hour. The catchment area is divided
into 7 sections with a total area of 4.081 km2 and runoff water discharge of 24,74 m3 / sec.
There are 3 main open channels where each open channel is able to accommodate
the surrounding water discharge. There are 3 zones of settling ponds, namely the west zone,
the middle zone, and the east zone, based on the results of the calculation of the three zones
of the settling pond have not been able to accommodate all flowing discharges. The
required settling ponds are the West zone of 14.400 m2, the Central zone of 14.250 m2, the
East zone of 15.600 m2. For the settling pond dredging time, the average is once every 4
years.

Item Type:	Thesis (Other)
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User:	Eko Yuli
Date Deposited:	28 Jul 2023 02:36
Last Modified:	28 Jul 2023 02:36
URI:	http://eprints.upnyk.ac.id/id/eprint/36617

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