Timing of transition from openpit to underground mining: A
Mohammad Waqar Ali Asad,Erkan Topal Add to Mendeley https://doi/101016/jresourpol2022 Get rights and content • Generally, Transition from open pit to underground mining often risks mud rushes (if mud forming minerals are present), and from sumps and surface dams Air blasts can result from Planning Considerations For Transition From Open Pit To
Issues with transitioning from open pits to underground caving
The authors believe that an holistic approach to evaluating the transition from open pit to underground is required, not simply an open pit optimisation, followed by a transition to This paper proposes a mixedinteger programming model to obtain the optimal transition point and the transition period from openpit to underground mining, Timing of transition from openpit to underground mining: A
Optimizing the open pittounderground mining transition
We see the open pit, black, encroaching on the underground mine, gray, in the transition zone We present a new model and corresponding solution techniques to 824 Accesses 25 Citations Metrics Abstract There are many deposits that have the potential to be mined by a combined method of openpit and underground In Transition from openpit to underground as a new
Opencast to underground iron ore mining method
The study shows that the proposed method uses the technologies of the mininginduced caving method in underground mining and deep mining at the bottom of Currently, most mine operators schedule the open pit and underground operations independently and then merge the two, creating a myopic solution We Optimizing the open pittounderground mining transition
Optimization of open pit to underground transition depth: An idea
This paper proposes a mixedinteger programming model to obtain the optimal transition point and the transition period from openpit to underground mining, The failure of underground goafs will change the structure and stress status of a rock mass More seriously, such a failure can lead to large areas of rock mass collapse, greatly impacting the mine operations and personnel safety (Hoek and Brown 1980; Bye and Bell 2001; Chen et al 2017)For mines that are transforming from open Study of the Rock Mass Failure Process and Mechanisms During
A stochastic optimization formulation for the transition
As open pit mining of a mineral deposit deepens, the cost of extraction may increase up to a threshold where transitioning to mining through underground methods is more profitable This paper provides The macromicro mining response of the surrounding rock and overlying strata towards the transformation from openpit to underground mining is examined in the present study, based on the engineering background of the Jinning phosphate mine (Yunnan Phosphate Chemical Group Co, Ltd) via simulations involving similar materials, digital MacroMicro Response Characteristics of Surrounding Rock
Determining the open pit to underground transition: A proposed
method into pit optimisation software that takes into account the value that ore has if mined by underground method Consider a case in which some blocks can be mined by either open pit or underground method For any such block, the value used for pit optimisation must be the difference between its open pit value and its underground valueIn underground mining, block caving is the only method with the costs comparable to surface mining methods, especially open pit mining A switch from open pit mining to block caving mining could be another great development in this century However, even though an increasing number of mines are being developed using block caving, this methodOpen pit or block caving? A numerical ranking method for selection
Numerical Simulation of Crown Pillar Behaviour in Transition from Open
The Santo Niño ore body at Pinos Altos Mine has been in production since 2009 using both open pit and underground mining methods Between 2015 and 2017, an extensive study evaluated extractionTraditional openpit mining can no longer meet the requirements of the continuous exploitation of mineral resources; therefore, underground mining has been adopted at several mines after a(PDF) Transition from OpenPit to Underground as a New
Mining Free FullText A Stope Mining Design with MDPI
To continue mining operations and to obtain greater productivity, a transition from surface mining to underground mining is necessary, as the costs associated with waste removal and management experience a significant exponential increase Bakhtavar determined the optimal transition depth from open pit to underground mining in Moving from open pit to underground operations is fraught with complications North American Mining spoke to three experts about the considerations and risks involved By Jonathan Rowland A majority of mining operations begin life as open pits; however, as mining progresses, ore reserves may be proved to extend to greater depths PLANNING AN UNDERGROUND TRANSITION North American
Mining Method Selection and Optimization of Transition from Open Pit
The mines involved in a coordinated open pit with underground mining include metal, nonmetal, and coal, such as Kiirunavaara Mine in Sweden, Kidd Creek Copper Mine in Canada, Abakanskoye Iron MineTherefore, openpit to underground mining has been adopted in several mines once a sufficient depth is achieved with openpit mining [2] This new mining model in an openpit slope induces movement and failure of the rock mass and ground surface, and could lead to crushing and burying in ground infrastructure, thus presenting a grave Optimization of open pit to underground transition depth: An
(PDF) Open Pit to Underground Mining Transition:
Venetia Open Pit Mine, after 30 years of production, will be transitioning to underground production in Q4 2022 This presents an interesting conundrum: aggressively maximise pit ore recovery andIt was found out that in transition from open pit to underground, slope and stope walls closing in on the crown pillar induce stresses that act as loading from the pillar sides, which in turn influence the failure process Original language: English: Pages (fromto) 22132229: Number of pages: 17:Numerical Simulation of Crown Pillar Behaviour in Transition from Open
Timing of transition from openpit to underground mining: A
Generally, shallow deposits are mined through openpit mining and where the deposits are extended to a substantial depth, there is a potential for a combination of openpit and underground mining methods In this case, mine planning and optimisation play a significant role in the decisionmakingSRK carried out a scoping study on an existing open pit operation (12 Mtpa) that is soon to be reaching a depth where the mine will need to transition to a largescale underground mining methodThe goal was to provide production continuity at a rate that will still be suitable to maximise use of the existing surface processing facilitiesOpen Pit To Underground Transition SRK Consulting
Determining the open pit to underground transition: A new
method into pit optimisation software that takes into account the value that ore has if mined by underground method Consider a case in which some blocks can be mined by either open pit or underground method For any such block, the value used for pit optimisation must be the difference between its open pit value and its underground valueThe transition from open pit to underground mining is a complicated geomechanical process which requires the consideration of rock mass properties [35,36] In OP to UG transition, the challenge of deformation, displacement, and rock formation stability need to be meticulously investigatedA Review of Models and Algorithms for SurfaceUnderground
MacroMicro Response Characteristics of Surrounding Rock
Most of China’s openpit mines were built in the 1950s After several decades of continuous highintensity mining, the vast majority of openpit mines have entered the deep openpit mining stage and even underground mining The transition from openpit to underground mining is a complex systems engineering problem, and the resulting deforThe pillars in Sections 20 and 25 are unstable which are mainly affected by the Faults F8 and F18 The existence of faults alters the stress distribution, failure mode and water inrush pathway This work provides a meaningful standard for boundary pillar and stope design in a mine as it transitions from an open pit to undergroundStability of boundary pillars in transition from open pit to
Rock mass response to the transition from open pit to underground
A number of large ore deposits which are mined initially by large open pit methods, also have considerable vertical extents At some point, a decision has to be made as to whether to continue deepening a pit, or to change to low cost, high productivity underground mining, generally by caving methods Currently, several large open pit mines are