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HAR, Rusli
Jurusan Teknik Pertambangan FT UNP

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Studi Penempatan Sumur Resapan Berdasarkan Nilai Laju Infiltrasi, Kualitas Fisik Air dan Tekstur Tanah pada DAS Batang Arau Kota Padang Maryand, Dicky; HAR, Rusli
Bina Tambang Vol 4, No 1 (2019): JURNAL BINA TAMBANG
Publisher : Jurusan Teknik Pertambangan FT UNP

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Abstract. The problem in this study is that there is a function change of land from forest areas, agricultural land and cultural heritage into residential land, the tendency for fast-saturated land, high rainfall intensity and frequent occurrence of inundation (flooding). Based on infiltration rate data, the average infiltration rate of the study area of 0.0914 cm/minute is included in the classification of very low recharge areas (<0.1 cm/minute). Therefore it is necessary to design infiltration wells by looking at the infiltration rate, physical quality of water and lithology of rocks. This research was conducted at 31 different points. The data obtained are primary data which are direct observations in the field, namely data on physical quality of water by using water checkers and secondary data, namely the infiltration rate and lithology of rocks.Based on statistical analysis, physical quality of water, rock lithology conditions and land use greatly affect the placement of infiltration wells. Planning placement of infiltration wells is located in residential, trading and service land areas with a number of 23 point infiltration wells that are spread downstream of the Batanng Arau Watershed, Padang City.Keywords:   Infiltration Rate, Physical Quality of Water, Lithology of Rocks, Land Use, Infiltration Wells
EVALUASI SISTEM DEWATERING PADA TAMBANG EMAS BAWAH TANAH CIURUG L.450 BAGIAN SELATAN DI UPBE PONGKOR PT. ANEKA TAMBANG (PERSERO) TBK. Pane, Dwi Hariana; HAR, Rusli; Kasim, Tamrin
Bina Tambang Vol 3, No 2 (2018): Jurnal Bina Tambang
Publisher : Jurusan Teknik Pertambangan FT UNP

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Dalam sistem penambangan bawah tanah pada lokasi Ciurug L.450 PT. ANTAM (Persero) Tbk UBPE Pongkor masalah yang sering terjadi adalah banyak air yang masuk atau tergenang. Oleh karena itu dibutuhkan sistem penyaliran tambang untuk menunjang jalannya aktivitas penambangan, sehingga berbagai infrastruktur yang dibuat bertujuan untuk mengendalikan air yang mengalir di area penambangan khususnya di dalam lubang bukaan. Sistem penanganan air di daerah ini lebih diperhatikan karena berhubungan langsung dengan aktivitas penambangan yang selalu bersifat mobile (bergerak), sehingga debit air yang keluar harus sesuai dengan debit air yang masuk ke dalam tambang.Pada daerah Ciurug L.450 bagian selatan mempunyai 7 mine sump, karena sistem pemompaan dilakukan dengan cara mengalirkan air dari satu mine sump ke mine sump berikutnya hingga mencapai ke mine sump utama. Jenis pompa yang digunakan Tsurumi LH637, Tsurumi LH875 dan Warman 4/3 EHH. Jumlah pompa yang digunakan saat ini berjumlah 28 unit, dikarenakan besarnya debit air tanah yang masuk. Banyaknya pemakain jumlah pompa diakibatkan belum adanya pengukuran debit air secara detail pada tambang Ciurug L.450 bagian selatan. Pengukuran debit air tanah pada tambang Ciurug L.450 bagian selatan dilakukan secara manual terbagi atas dua daerah yaitu Ramp Down A (RD A) menggunakan wadah drum dan Ramp Down B (RD B) menggunakan paritan.Berdasarkan pembahasan dan analisis data dapat disimpulkan debit air tanah pada daerah RD A XC 452 sebesar 0,317 (m3/m) dan XC 445 sebesar 0,112 (m3/m) sedangkan pada RD B debit air 9,29 (m3/m) dan jumlah unit pompa yang dibutuhkan untuk mengeringkan air berjumlah 23 unit terdiri dari 8 unit Tsurumi LH637, 3 unit Tsurumi LH875 dan 12 unit Warman 4/3 EEH serta rancangan instalasi pemompaan yang ideal dan efektif.Kata Kunci: Sistem Penyaliran, Pompa, Debit Air
Analysis Of JHA, JSA and Management K3 At KIP 16 Bangka Ocean Mining Units PT Timah (Persero) Tbk Province Bangka Belitung Islands Joni, Riri Rahmahwati; HAR, Rusli; Prabowo, Heri
Bina Tambang Vol 3, No 1 (2018): Jurnal Bina Tambang
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This research discuss about safety and health occupational control inBangka Ocean KIP Timah 16 Units using some risk management methodes. Themethodes are Job Hazard Analysis (JHA), Job Safety Analysis (JSA), and HazardIdentification Risk Assesment Determining Control (HIRADC). Purpose of theresearch is to explain safety and health occupational in KIP Timah 16 Unit it isfor get the improvement of productivity work, production, welfare andcomfortability workers and achievment of zero accident.The type pf the research is descriptive. There are two data had collected.They are primary and secondery data. Primary data get from interview with theemployees and secondary data get from K3 documents in thecenter company ofPT. Timah UPLB and KIP 16.Based on result of research can get some conclutions. First, explain safetyand health occupational system. Second, the implementation formula of FR, SRand IR to count total accident that lost from day work, percentage of accident fora month. Third, to use methode JHA, JSA and HIRADC for identification andcontrol occupational accident. And last, to arrange new SOP from analysis resultJHA, JSA, HIRADC and earlier SOP.
Evaluation of Actual Condition and Planning of Drainage System in Gold Mining at Pit Durian, Site Bakan PT. J Resources Bolaang Mongodow, Lolayan Sub-district, Kotamobagu, North Sulawesi Kurnia, Dian; HAR, Rusli; Prabowo, Heri
Bina Tambang Vol 3, No 1 (2018): Jurnal Bina Tambang
Publisher : Jurusan Teknik Pertambangan FT UNP

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Based on analysis of rainfall data in 2007-2016, rainfall is obtained from the plan of 149,70 mm/day with different rain intensity in each catchment area. 5-year rain recharge period and hydrogeological risk of 67.23%. At the research location, Pit Durian PT. JRBM, in 2017 has 4 catchment areas with different area, total discharge equal to 11.913,206 m3/hour, there are 2 sumps that is South 1 Sump and North Sump with maximum capacity of 12.702 m3 and 29.596 m3 and there is one Volvo KSB LCC-H 200-610 on each sump, there are three open channels and one main setling pond with different compartment capacity. After an evaluation of the mine drainage system in 2017, South 1 Sump requires an additional 2 units of Volvo KSB LCC-H 200-610 and North Sump pumps requiring additional pumps of 1 unit of Volvo KSB LCC-H 200-610 pump.In the planning of Pit Durian mine drainage system in 2018, Pit Durian has 7 catchment areas with different area with total discharge of 14,393,101 m3/hour, there is addition of sump to 5 sump namely South 1 Sump, South 2 Sump, South 3 Sump, North 1 Sump and North 2 Sump with capacity of each sump is planned for 33,485 m3, 40,745 m3, 35,399 m3, 11,565 m3 and 20,193 m3 and requires 1 unit of Volvo KSB LCC-H 200-610 pump on each sump. The of mine drainage system in 2018 is planned to have an open channel as well as a setling pond similar to 2017.
Analisis Stabilitas Lereng Ruas Jalan Sicincin–Malalak Km 31 Kecamatan Malalak, Kabupaten Agam, Provinsi Sumatera Barat Suedi, Evansharsal; Kopa, Raimon; HAR, Rusli
Bina Tambang Vol 3, No 3 (2018): JURNAL BINA TAMBANG
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Landslide natural disasters are one of the natural disasters that cause fatalities and property. Based on the frequency of events, intensity, and geological conditions, the area of Kabupaten Agam Sumatera  is an area that must be aware of the potential for landslidesthis is shown in the vulnerability map of soil movement by the Dinas Energi dan Sumberdaya Kabupaten Agam Sumatra Barat. Malalak District Agam Regency is one of the zones that has a high vulnerability to soil movement. This is shown in the Agam Regency Landslide Hazard Map which needs to consider slope security because it has many factors triggering landslides, especially in its purpose as road access.This research is classified into applied research. Slope stability in this study will use slope geometry data, physical properties, mechanical properties, Rock Quality Designation (RQD) rock mass classification, Rock mass Rating (RMR) and using the Bishop Simplified method (FK or Safety Factor) supported by software. analysis of avalanche types and security factor analysis.As a result of the research carried out on the Malalak KM 31 road section, it can be concluded the following points. The rock type of the slope compiler is andesite with the value of rock mass classification with a value of RMR of 68 including in the second (II) class rocks with good rock categories. The results of kinematic analysis indicate the potential for Baji avalanches. Ground vibration that is received by the slope affects the stability value with the value of the earthquake vibration based on the Indonesian seismic map of 0.6 g. In determining the value of the actual slope safety factor using security factor analysis software obtained FK value in dry conditions of 4,000, natural conditions of 3,979, saturation conditions of 3,966 this shows the condition of the water in the rock does not significantly affect the value of slope safety factor. Whereas the value of the safety factor with the influence of vibration is obtained in a dry condition is 2,659, the natural condition is 2,642, the saturation condition is 2,638 from the result of the vibration effect on the stability of the slope has a considerable decrease in the safety value of the slope but shows that the slope condition is still stable. Keywords:  Slope Stability,Road ,Ground Vibration ,RMR, Safety Factor
Kajian Laju Infiltrasi Akhir pada Daerah Aliran Sungai (DAS) Batang Arau Kota Padang Ditinjau dari Perbedaan Litologi, Tata Guna Lahan, dan Sifat Fisik Tanah Zulvi, Yosia Yoandika; HAR, Rusli
Bina Tambang Vol 3, No 3 (2018): JURNAL BINA TAMBANG
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The change of forest or agricultural land function into a habitation made the diminished or rainwater infiltration into the soil (infiltration). This causes the groundwater reserves to decrease and the larger surface flow. In addition, infiltration is also influenced by several other things such as the condition of lithology, topography, and soil physical characteristic. For that reason, it is necessary to study the final infiltration rate, as it has been tested in the Batang Arau watershed of Padang. This research was conducted on 31 measurement points, from the upstream into the downstream of watershed which mostly located in alluvium area. The data obtained are the primary data in the form of direct observation in the field, they are infiltration rate estimation (double ring infiltrometer), description of lithology (handbor), matric suction (tensiometer) ¸ and the measurement of soil physical characteristic (sand cone). Based on data processing using Kostiakov model, the mean  of final infiltration rate in the study area was 0,0914 cm / min, belong to the very low recharge classification (<0,1 cm/min). The high infiltration rates occur in sand lithology, and the low one occur in clay and silt lithology with agricultural land use. Based on statistical analysis, the soil physical characteristic simultaneously have a very strong correlation with the infiltration rate (0,894). The infiltration zonation mapping is divided into 6 zones, with the lowest infiltration rate zone 0,000808 – 0,058093 cm/min, and the highest infiltration rate zone 0,991835 – 1,46157 cm/min. In addition, the water debit that can be absorbed by the soil in the research area with an area of 96,187 km2 is very small, 54.000,0437 m3/jam/km2.Keywords:  Infiltration Rate, Lithology, Land Use, Soil Physical Characteristic, Infiltration Zonation
Analisis Kestabilan Lereng Studi Kasus Kelongsoran Ruas Jalan Sicincin-Malalak KM 27.6 Kecamatan Malalak, Kabupaten Agam Aini, Qiratul; Kopa, Raimon; HAR, Rusli
Bina Tambang Vol 3, No 2 (2018): Jurnal Bina Tambang
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Badan Penanggulangan Bencana Daerah Kabupaten Agam, Sumatera Barat, menyatakan sekitar 65.068 dari 519.000 warga Agam berada dan tinggal di lokasi rawan tanah longsor. Salah satu kejadian longsor di Kecamatan Malalak (2017), mengakibatkan penutupan ruas jalan alternatif Sicincin-Bukittinggi. Selain itu, terdapatnya titik yang rawan terhadap longsor yaitu pada titik S 0° 22.314' dan E 100° 17.339 dengan elevasi 1212 mdpl.Penelitian ini merupakan penelitian terapan (applied research) dengan metode kuantitatif. Analisis kestabilan lereng dibantu dengan software tambang. Data yang digunakan adalah data primer yang terdiri dari data sifat fisik tanah yaitu: kadar air tanah, bobot isi tanah, dan spesific gravity, data kuat geser tanah dimana uji kuat geser tanah akan menghasilkan nilai kohesi (c) dan sudut geser dalam tanah (????), tinggi lereng (m), sudut kemiringan lereng (˚) dan ketebalan tiap lapisan tanah pada lereng penelitian(m). Sedangkan untuk data sekunder terdiri dari Peta Geologi, Peta Hidrogeologi, data curah hujan, Peta Topografi Kabupaten Agam dan Peta Zonasi Gempa Indonesia.Hasil analisis menunjukkan nilai faktor keamanan lereng aktual tanpa memasukkan nilai getaran gempa pada kondisi kering adalah 1,388, kondisi asli adalah 1,040 dan pada kondisi jenuh adalah 0,755. Kemudian nilai faktor keamanan lereng dengan memasukkan nilai faktor getaran gempa pada kondisi kering nilainya 0,742, pada kondisi asli nilainya nilainya 0,599 dan pada kondisi jenuh 0,340. Dari hasil analisis kestabilan lereng menunjukkan bahwa pada saat lereng tidak dipengaruhi nilai faktor getaran gempa nilai faktor keamanannya pada kondisi asli dan jenuh tidak aman karena nilainya <1.25, sedangkan saat kondisi kering lereng tersebut dalam keadaan stabil. Sedangkan jika lereng dipengaruhi getaran gempa didapatkan pada semua kondisi lereng stabil. Kemudian, penulis merekomendasikan untuk perbaikan stabilitas lereng dengan mengubah kemiringan lereng dari 61˚ menjadi 42˚ pada kondisi tanpa memasukkan nilai getaran gempa dapat menaikkan nilai FK lereng nilainya yaitu 1.403, dimana menurut Joseph E. Bowles (1984) lereng tersebut sudah pada kondisi aman.Kata kunci: analisis kestabilan lereng, faktor keamanan, getaran gempa
Analisis Potensi Longsor pada Ruas Jalan Malalak Km 33 di Kecamatan Malalak, Kabupaten Agam, Provinsi Sumatera Barat Prasuryani, Resty; HAR, Rusli; Kopa, Raimon
Bina Tambang Vol 3, No 4 (2018): JURNAL BINA TAMBANG
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Abstract. Based on observations made on Sicincin-Malalak street KM 33 have been found 12th failure point with various conditions and types of failure. In addition, the geometry of the slope, high intensity of the earthquake and rainfall greatly affect to the condition of slope stability. The research was done on rock  slope with many joints, steep geometry, and many rockfalls. From these problem, we need to measure the physical characteristic, compressive strength and rock mass condition in research area using Rock Mass Rating (RMR) classification. Furthermore, the analysis of potential failure in the research area doing using dips to know the type of failure and then analyzed the stability of the slope using the limit equilibrium  method.  The results of rock mass classification with RMR obtained rocks included in Group II which means rock mass in good condition. Analysis using dips in get type of failure is toppling failure with possibly 15,53% with failure stike = N 225 E - N 285 E and dip = 15° - 90°. Furthermore, slope stability analysis was performed using the equilibrium limiting method for toppling failure and obtained FK values of slope is 1,58 which means that the slope is stable but still need protection from rock fall with construction of ditch and wiremesh instalation.Keyword: Failure, limit equilibrium method, toppling, slope stability, RMR
Kajian Laju Infiltrasi Pada DAS Air Timbalun Kota Padang Ditinjau Dari Perbedaan Lithology, Kemiringan Lahan, dan Parameter Fisik Tanah Fauzan, Ahmad; HAR, Rusli
Bina Tambang Vol 3, No 4 (2018): JURNAL BINA TAMBANG
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Abstract. Infilration that is disturbed in an area will affect the existing hydrological cycle and make the natural balance not met. The construction and opening of new land has led to a diversion of land use which was originally a water catchment area, so that the water catchment area was reduced, causing flooding in residential areas. Infiltration is also influenced by several factors including rock lithology conditions, land slope and soil physical condition. Therefore, it is necessary to study the infiltration rate, infiltration zoning mapping, and the calculation of water discharge that can be applied to the soil. This research was carried out at 15 different points. The data obtained are primary data which is direct observation in the field, namely the coordinates of the study location, groundwater data, lithology, land slope, soil physical properties (water content, porosity, saturated hydraulic conductivity, soil density), and infiltration rate measurement data. Based on data processing using the Kostiakov method, the average infiltration rate of the study area was 0.010565 cm/min, including the very low absorption area classification (<0.1-0.2 cm/min). based on statistical analysis, rock lithology conditions, land slope and soil physical properties are very influential on the rate of infiltration. Infiltration zoning mapping was divided into 6 zones, with the lowest infiltration rate 0.000017093-0.002509782 cm/minute and the highest infiltration rate zone 0.022775581-0.046821598 cm /minute. In addition, the water discharge that can be absorbed by the soil in the study area with an area of 14,199 km2 is 6,600 m3/hour/km2 (very low). Keywords: Infiltration Rate and Infiltration Zone , Kostiakov Method, Rocks Lithology, Land Slope, Soil Physical Characterist
Kajian Laju Infiltrasi Ditinjau dari Perbedaan Litologi Batuan, Kemiringan Lahan dan Sifat Fisik Tanah pada DAS Sungai Pisang Kota Padang Mendoza, Mendoza; HAR, Rusli
Bina Tambang Vol 3, No 3 (2018): JURNAL BINA TAMBANG
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The problems of this research were illegal logging in waterheds areas,  as well as land conversion as residential area and other used thus, the disruption of the rain absorption area into the soil (infiltration). Highest of the rain caused of saturated soil and potential flooding. More other, infiltration influenced by several factor they are: rocks lithology condition, land slope and soil physical characteristic. Therefore  have to doing study about infiltration rate, infiltration zone mapping and calculation of water discharge that can be absorbed by soil. This study was conducted on 10 different point. The data that had been gotten from primary data was observation in the field, that is data of infiltration rate estimation by using double ring infiltrometer, handbor for rocks lithology, tensiometer and sand cone for measuring of soil physical characteristic. Based on processing of the data using Kostiakov method, got average of infiltration rate research area is 0.1303 cm/min, belong to the classification of absorption area is very low (<0.1-0.2 cm/min). Based the statistics analysis, the condition of rocks lithology, land slope and soil physical characteristic is very influenced toward infiltration rate. The infiltration zone mapping is devided into 6 zone, with lowest infiltration rate of 0,001002-0,082666 cm/min and the highest infiltration rate zone is 0.0610078-0.86868 cm/min. Furthermore the water  discharge that can be absorbed by soil in research area of 1.22 km2 is 78,000 m3/hr/km2 (very small).  Keywords: Infiltration Rate and Infiltration Zone , Kostiakov Method, Rocks Lithology, Land Slope, Soil Physical Characteristic