Investigating the causes of stope instability at Golden Valley Mine

• Autorzy: Sabao Ashley Ruvimbo , Munemo Prosper , Kolapo Peter

Identyfikatory

DOI

10.46873/2300-3960.1354

• Języki publikacji: EN

Abstrakty

EN

The study is based on mining operations that are concentrated in a ground exposed to flooding with varying stope dimensions. Stope stability was assessed in the four stopes, which resembled the mine’s different ground conditions using the stability graph complemented by the equivalent linear over break slough (ELOS) stability approach. The stability graph showed that the stopes in rock masses exposed to flooding fell in the potentially unstable and caving zones whereas the ones that were not affected by flooding fell in the stable zones. The ELOS approach showed that mining the previously flooded rock masses resulted in high over-breaks in the stopes despite them having smaller hydraulic radii. Therefore, it was deduced that although stope extension plays a part in the over-breaks experienced in different stopes, it is not the main cause of the overall stope instability. The results confirm the supposition that over-break is largely controlled by pore pressure than it is by blast induced stresses. Continuous implementation of the old support systems was no longer compatible with the state of the ground conditions. Hence, the mine should implement 6 × 8 m pillars, which have an acceptable factor of safety against failure.

Słowa kluczowe

EN

stability; flooding; stope; safety factor

PL

stateczność; zalewanie; stop; współczynnik bezpieczeństwa

• Wydawca: Elsevier ; Główny Instytut Górnictwa
• Czasopismo: Journal of Sustainable Mining
• Rocznik: 2022
• Tom: Vol. 21, iss. 2
• Strony: 128--140
• Opis fizyczny: Bibliogr. 26 poz.

Twórcy

autor

Sabao Ashley Ruvimbo

• Manicaland State University of Applied Sciences, Department of Mining and Mineral Processing Engineering, Mutare, Zimbabwe
• Central South University, School of Resources and Safety Engineering, Changsha, China

• https://orcid.org/0000-0002-7161-1402

autor

Munemo Prosper

• Manicaland State University of Applied Sciences, Department of Mining and Mineral Processing Engineering, Mutare, Zimbabwe

• https://orcid.org/0000-0001-5126-5322

autor

Kolapo Peter

• University of Kentucky, Department of Mining Engineering, USA

• https://orcid.org/0000-0002-8840-1284

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).