Modeling a chamber excavation with face shape control
Zhetesova G.S. Beysembayev K.M. Nokina Zh.N. Akizhanova Zh.T. Asmagambet D.K.
2021Ugol Journal Edition, LLC
Ugol
2021Issue 114 - 20 pp.
New technologies for chamber excavation of disturbed reserves of solid minerals using maneuvering supports are considered. The excavation is carried out by short runs from the main drift with the use of a rotary conveyor in the face and preparatory workings and by turning the chamber during the return stroke. They reduce the loss of mineral and allow the application of fastening schemes depending on the rock pressure. On the basis of Ansys APDL , models of the state of the rock mass with a ledge bottom shape with support of the ledge and a strip of the roof behind it, and support of the working with stationary-portable sections, taking into account the changing architecture of the workings, are considered. The model takes into account the resistance of the sections with the reduced modulus of elasticity that grows during deformation of rocks, as well as active loads calculated from the condition of the safety valve of the hydraulic prop. It is shown that by changing the size of the support sections, it is possible to control the state of the face and bench, to ensure its self-collapse and safe work of personnel, and in technologies with the release of the ceiling, to ensure the productive work of the retractable executive bodies for crushing and releasing the mineral of the bench with a fence from collapsed rocks.
Bench , Face , Modeling , Rotary conveyor , Self-caving
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Karaganda Technical University, Karaganda, 100027, Kazakhstan
Karaganda Technical University
10 лет помогаем публиковать статьи Международный издатель
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