In the mining and sawing operations in the mine, when the cutting surface enters the final stage, the old wire saw must be used to replace the wire saw in use .This is because in the final stage of cutting, especially the final stage of horizontal cutting, the connection area between the ore body and the separated body is relatively small, and only the steel wedge inserted between the horizontal plane is not enough to support the separation body, so it is difficult to ensure that the separation body will not collapse, leading to the accident of the beaded rope being pressed in the saw joint and scrapped. Especially for ore bodies with relatively developed fissures, local rock collapse in the separated bodies often occurs. Even if it is vertical cutting or block trimming cutting, the wire saw may be crushed in the saw gap and scrapped due to the side slip and dumping of the separated body. If a new wire saw or a wire saw with a certain service life is used to saw the last connection surface, encountering such an accident, the whole or most of the wire saw will be scrapped and unnecessary economic losses will be caused.
Skont sitwazzjonijiet differenti, iż-żmien tas-sostituzzjoni huwa ġeneralment waqt is-serrar orizzontali. Meta d-distanza bejn is-serrieq tal-wajer li jidħol u joħroġ mill-qasma tas-serrieq titnaqqas għal 1.5-2.5 metri, ibdel is-serrieq tal-wajer li qed jintuża b'ħabel tal-wajer antik li huwa kważi skrappjat, u kompli s-separazzjoni u t-tqattigħ tal-wiċċ ta 'konnessjoni finali tal- korp tal-mineral u l-korp separat. L-istadju finali tal-qtugħ ta 'pjani vertikali jew id-diżintegrazzjoni u t-tirqim tat-tqattigħ jeħtieġ ukoll dan it-tip ta' operazzjoni ta 'sostituzzjoni ta' ħbula qodma b'oħrajn ġodda. Jekk il-pożizzjoni tar-rota gwida hija installata kif suppost, il-ħabel tal-wajer antik jista 'saħansitra jaqta' mill-qasma direttament mingħajr ma jħalli l-ebda parti ta 'konnessjoni, sabiex il-wiċċ maqtugħ ikun ċatt, u jiġi evitat li meta l-parti finali ta' konnessjoni tkun separata, wieħed in-naħa se titnaqqas u n-naħa l-oħra titqajjem, li se taffettwa l-formazzjoni tal-blokka.
