Authors: A.V. Kulakov, A.I. Konurin, D.S. Elgazinov, Yu.N. Shaposhnik

Title of the article: Reinforcing the metal frame mounting on the base SVP profile with additional lengths of side posts

Year: 2024, Issue: 5, Pages: 125-139

Branch of knowledge: 2.8.8 Geotechnology, mining machines

Index UDK: 622.281.5

DOI: 10.26730/1999-4125-2024-5-125-139

Abstract: Increasing the depth of mining operations leads to an increase in rock pressure and necessitates improving the technologies for maintaining mine workings. At the same time, changing mining and technical conditions of development require prompt changes in the lining parameters, and at most mining enterprises, the cycles of purchasing and delivering new materials take a long time. The article considers the issues of lining large cross-section mine workings with metal frame supports made of SVP profile. The experience of mining in unstable rocks shows that when conducting large cross-section workings, it is quite difficult to select the required size of frame support, and one of the possible options for lining in such conditions is to strengthen the lining with additional side supports. Mathematical modeling of the proposed lining design was performed using the finite element method within the framework of elasticity theory. The main performance characteristics of linings of a standard design and with an increase in the height of the side supports using a welded structure were calculated. The stability analysis of supports made of SVP profile for checking and confirming their bearing capacity when changing the standard design is performed based on analytical calculations of support loads and numerical modeling of arched metal support with extension of the side post. It was found that extension of the side post using a welded structure by a section of SVP profile 0.4÷1.0 m high using welding does not reduce the performance characteristics of the supports, provided that the quality requirements for the welded joint are met. Deviation from the design height and corresponding extension of the side post using a welded structure by more than 1.5 m is not allowed.

Key words: fastening of excavations arched metal supports mathematical modeling stress-strain state of support elements

Receiving date: 27.05.2024

Approval date: 29.09.2024

Publication date: 24.10.2024

CITE DOWNLOAD