Perancangan Penambangan Batu Andesit di PT Widaka Indonesia Kecamatan Baleendah, Kabupaten Bandung Provinsi Jawa BaratPerancangan Penambangan Batu Andesit di PT Widaka Indonesia Kecamatan Baleendah, Kabupaten Bandung Provinsi Jawa Barat

Abstract

Abstract. PT Widaka Indonesia is one of the mining companies that carry out andesite mining activities that expand the IUP. PT Widaka Indonesia exploration results obtained three types of lithology, namely overburden, tuff and andesite rock. The location of the andesite exploration/exploitation activities of PT Widaka Indonesia is administratively located in Jelekong Village, Baleendah District, Bandung Regency, West Java Province. Geographically, it is located between 7o01' 53.9" South Latitude – 107o39' 58.9" East Longitude. From the lithology, it is modeled to determine the distribution of geological conditions. The location of exploration/exploitation is in a moderately hilly slope area with an altitude of 700-751 meters above sea level. Based on the results of the mapping and measurement of the IUP area requested by PT Widaka Indonesia, it is an area of 12.91 hectares, including the mining front, explosives warehouse, office and several other supporting facilities. Baleendah area and its surroundings, according to the classification of Schmidt and Fegurson. is included in the Type C climate, which is humid and cool, the air temperature ranges from 23oC with humidity ranging from 78% - 85%. The results of the calculation of andesite resources and reserves based on SNI 4726:2011 with a total potential of andesite material, both massive and soft (sandstone, tuffan), in the PTWI IUP is approximately 4,791,594 tons. At the location of the planned andesite mining activities, In the vicinity of PT Widaka Indonesia, there are also dry land plantation areas and wet land agricultural areas. There is also a Factory Area and Residential Settlement on the path / access to the location for approximately 1 km. The final design of the mine is at an elevation of 680 masl. Mining limits are carried out within 6 years of mining. Mining phasing is carried out following the andesite production target of ± 126,000 BCM/quarter. The demolition of the material is carried out from an elevation of 710 masl to an elevation of 680 masl. The mining direction is carried out from North - South with mining progress towards the East.

Keywords: Resource and Reserve, Pit Design, Production Target, Mine Phasing 

Abstrak. PT Widaka Indonesia  merupakan salah satu perusahaan tambang yang melakukan kegiatan penambangan andesit. Hasil eksplorasi PT Widaka Indonesia diperoleh tiga jenis litologi, yaitu tanah penutup, tufa dan batu andesit. Lokasi kegiatan ekplorasi dan eksploitasi batu andesit secara administratif terletak di Kelurahan Jelekong, Kecamatan Baleendah, Kabupaten Bandung, Provinsi Jawa Barat. Secara geografis terletak antara 7o01’ 53,9†LS – 107o39’ 58,9†BT. Dari litologi tersebut dimodelkan untuk mengetahui penyebaran dari kondisi geologi. Berdasarkan hasil pemetaan dan pengukuran luas area IUP yang  dimohon oleh PT Widaka Indonesia adalah area seluas 12,91 ha, termasuk nanti di dalamnya area penambangan, gudang handak, kantor dan beberapa fasilitas pendukung lainnya. Hasil perhitungan sumber daya dan cadangan batu andesit berdasarkan SNI 4726:2011 dengan total potensi material andesit, baik yang masif maupun yang lunak (batupasir, tuffan) sekitar 4.791.594 ton.  Di lokasi rencana kegiatan penambangan batu andesit PT Widaka Indonesia di sekitarnya juga terdapat kawasan Perkebunan Lahan Kering dan Kawasan Pertanian Lahan Basah.  Terdapat  juga  Area  Pabrik  dan  Pemukiman  Penduduk  pada  jalur/akses  masuk ke lokasi sejauh kurang lebih 1 km. Desain akhir tambang pada berada pada elevasi 680 mdpl. Batas penambangan dilakukan dalam selama 6 tahun penambangan. Pentahapan tambang dilakukan mengikuti target produksi batu andesit sebesar 126.000 BCM/triwulan. Pembongkaran material dilakukan dari elevasi 710 mdpl hingga elevasi 680 mdpl. Arah penambangan dilakukan dari Utara - Selatan dengan kemajuan tambang ke arah Timur.

Kata Kunci: Pentahapan Tambang, Desain Pit, Target Produksi