Papers by Hendra Harisman
Aceh International Journal of Science and Technology
The physical and chemical environmental impact in a mining area is inevitable, particularly for o... more The physical and chemical environmental impact in a mining area is inevitable, particularly for open pit mining areas. The impact could affect soil and water quality where mining activities, such as land clearing, blasting and hauling, occur. Thus, environmental monitoring in mining areas should be taken to measure the impact of mining activity for reclamation purposes. The objective of this research focuses on the measure of environmental impact on soil quality in terms of the nutrient content in an abandoned mine area at Jantang village, Lhoong, Aceh Besar. The research was conducted by collecting 15 soil samples, followed by laboratory analysis using atomic absorption spectrophotometry to investigate sampled 'soil's nutrients which are pH, Carbon (C-organic), Nitrogen (N-total), Phosphor (P-availability), and Ferro substance (Fe-concentration). In addition, to estimate the soil properties at locations outside the sampling area, a spatial interpolation method called invers...
Spread of liquid waste in un-licited gold mining by geoelectrical method in Krueng Sabee sub-district Aceh
IOP Conference Series: Materials Science and Engineering, 2021
Illegal gold mining has increased significantly in Keude village of Krueng Sabee Aceh Jaya subdis... more Illegal gold mining has increased significantly in Keude village of Krueng Sabee Aceh Jaya subdistrict. This causes environmental damage in the form of waste mercury pollution in the area. Environmental pollution caused by waste needs to be addressed. However, it needs to determine the appropriate method to overcome it by knowing the depth and the spread of mercury waste. This study aims to visualize subsurface conditions in the area of Krueng Sabee to provide information and data on the spread of mercury wastes. By using the method of geoelectric resistivity Schlumberger array, the contamination can be seen below the surface by the resistivity value of the sites. Results from these measurements after inverted using Earth Imager software of Res2Dinv can get a picture and visualize the location of subsurface conditions of the study. The results show that the resistivity value of waste mercury-contaminated soil at the study site ranged from 2–5 Ωm, and waste mercury contamination occu...
Kajian Biaya Produksi Pemindahan Material Batugamping dari Room of Material ke Crusher di PT Lafarge Cement Indonesia, Lhoknga, Aceh Besar
PT Lafarge Cement Indonesia sebagai perusahaan penghasil semen, mempercayakan proyek penambangan ... more PT Lafarge Cement Indonesia sebagai perusahaan penghasil semen, mempercayakan proyek penambangan batugampingnya pada PT Macmahon Indonesia dengan target produksi 6000 ton/hari. Namun, karena adanya permasalahan pada crusher, adanya hari libur nasional dan sebagainya yang menghambat tercapainya target produksi, maka PT Lafarge Cement Indonesia menyewa satu unit wheel loader milik PT Macmahon Indonesia dengan tipe CAT 992D atau dua unit wheel loader milik PT Meugah Asai Kana dengan tipe CAT 966D dan CAT 980C untuk melakukan proses pengangkutan batugamping dari Room of Material menuju crusher agar target produksi yang telah ditetapkan dapat tercapai. Setelah dilakukan penelitian, diperoleh biaya produksi dengan pengoperasikan wheel loader CAT 992D lebih tinggi dibandingkan wheel loader CAT 966D dan CAT 980C meskipun total produksi dengan mengoperasikan wheel loader CAT 966D dan CAT 980C lebih tinggi. Sehingga dapat disimpulkan bahwa pengoperasian wheel loader CAT 966D dan CAT 980C lebi...
Aceh International Journal of Science and Technology, 2021
Gaming technology has been growing these years rapidly. The game engines have the capability of c... more Gaming technology has been growing these years rapidly. The game engines have the capability of creating a very realistic virtual environment model. This technology can also be used for mining purposes. In this research, the game engine is specifically used to develop a mine self-escape simulation game for training purposes. The game engine which is used to develop the simulation game is Unreal Engine 3. The main advantage of using such a simulation game as a training tool is because it allows the trainee to experience a dangerous situation while not being put in danger. This kind of training is considered better than conventional briefing, normally conducted by showing a video or pamphlet. Studies have shown that people retain more information when they are involved interactively in the learning process. In this research, a computer simulation game as a training tool for underground coal mine self-escaped has been successfully created using fire scenarios. The player/trainee should follow some procedures to get to the safety zone.
Pemodelan Aliran Hidrogeologi Sungai Cikapundung Utara Menggunakan Kombinasi Boundary Element Method Dan Ground Penetrating Radar
Air tanah adalah air yang terdapat dalam lapisan tanah atau bebatuan di bawah permukaan tanah. Ai... more Air tanah adalah air yang terdapat dalam lapisan tanah atau bebatuan di bawah permukaan tanah. Air tanah merupakan salah satu sumber daya air yang keberadaannya terbatas dan kerusakannya dapat mengakibatkan dampak yang luas serta pemulihannya sulit dilakukan. Lapisan di dalam bumi yang dengan mudah dapat membawa atau menghantarkan air disebut lapisan akifer, biasanya berupa lapisan pasir dan kerikil, atau lava dan batu gamping.Salah satu metode geofisika yang dapat memetakan kondisi akifer adalah GPR yang menggunakan gelombang elektromagnetik dengan frekuensi radio. Sulitnya medan untuk melakukan survei GPR dalam memetakan akifer di beberapa tempat menyebabkan diperlukannya metode lain untuk membantu pemetaan. Adanya BEM, memungkinkan GPR untuk melakukan survei di perbatasan daerah survei saja. Geometri akifer bagian dalam dapat dipetakan dengan bantuan BEM setelah data-data akifer, di sepanjang perbatasan yang diukur dengan GPR, selesai diinterpretasi.Kombinasi metode GPR dan BEM ini dapat memetakan akifer dengan baik sehingga kontur lapisan akifer dapat dibuat. Selain itu, kombinasi dua metode ini dapat juga memetakan arah aliran air tanah di dalam akifer tersebut. Hal ini dapat memudahkan para ahli hidrologi dalam menganalisis pergerakan air tanah di suatu daerah.
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Papers by Hendra Harisman