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Copyright of Journal of Marine & Coastal Science is the property of Universitas Airlangga and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Stripping of the mud material used at PT Multi Harapan Utama in pit 40SST follows the regulations contained in the Decree of the Minister of Energy and Mineral Resources number 1827/K/30/MEM/2018 concerning stripping of mud material. Prior to stripping, there are several requirements so that the sludge material stripping activity can be carried out. The method used is the calculation of the volume and thickness of the mud material and testing the physical properties of the mud material. Based on the results and discussion that has been described, it can be concluded that the activity of stripping mud material in pit 40SST with a boundary area of 28.40 Ha and obtained a volume of mud material of 1,392,237 bcm and a mud thickness of 10.6 m can be carried out with mud material which has a water content of 80.7%. For draining the material is done by making a ditch so that there is no stagnant water. For the handling of mud materials, PC 1250 and PC 2000 diggers are used with the foundation taken from the blasted hard material carried by the conveyance and later leveled by the dozer. And finally, the specified safety distance is 3.5 times the thickness of the soft material specified by the Company. By fulfilling these requirements, work safety is met and coal mining activities can work optimally. [ABSTRACT FROM AUTHOR]