The sublevel open stoping with backfill method has recently been widely used in underground metal mines. primary CPB stope is frequently affected by blasting the secondary ore stope, leading to collapse and dilution, which become a common problem received widespread attention. Numerical simulations are carried out present work, 1/4 numeral model consisting of built. divided into four layers on ...

Most autonomous navigation systems used in underground mining vehicles such as load–haul–dump (LHD) and trucks use 2D light detection ranging (LIDAR) sensors representations/maps of the environment. In this article, we propose 3D LIDARs existing simultaneous localization mapping (SLAM) jointly with methods to produce or update grid maps tunnels that may have significant elevation changes. Exist...

Abstract Sublevel shrinkage (SLSh) is an underground mining method similar to sublevel caving (SLC) but with continuous backfilling from the top. It features a top-down sequence production drifts orientated in longitudinal or transverse way orebody. Fan drilling and blasting done drifts, where ore then drawn. While drawing, backfill introduced at top flows down by gravity, which supports walls ...

The impact of blast-driven shocks on the safety and stability of the underground coal mines has been well established. The seismic imperfections resulting from blasting depend on the total explosive energy released during blasting and the closeness of the development tunnel face to the stope face. Also, the quality of the rock mass wherein the whole stope face is located might pose considerable...

Las actividades mineras están asociadas a la influencia de factores externos e internos. empresas no tienen control sobre los como oferta y demanda metales, sin embargo, internos optimización gestión sus procesos es responsabilidad directivos supervisores. Los costos resultado mejora continua, procesos, seguridad en el trabajo, cuidado del medio ambiente su relacionamiento social. En este conte...

Mahasiswa keperawatan alih jenjang dari D3 ke S1 rentan mengalami stress, yang disebabkan tuntutan belajar tinggi. Stres menyebabkan Fatiqu, dimana seseorang tidak memiliki motivasi dan energi. Fatique merupakan gejala umum banyak kondisi medis ringan sampai dengan serius, bahkan bisa berujung kematian. Kondisi Fatiqu dapat diminimalisir cara melakukan terapi thought stopping, menghentikan piki...

Production planning in mineral exploitation should be undertaken to maximize exploited ore at a minimum unplanned dilution. Unplanned dilution reduction is among the ways to enhance the quality of products, and hence, reduce the associated costs, resulting in a higher profit. In this way, firstly, all the parameters contributing to unplanned dilution in underground stopes and specifically the c...