METHOD TO ERECT UNDERGROUND MINE WITH SHIELD TUNNELLING

摘要

FIELD: mining.SUBSTANCE: method to erect an underground mine with shield tunnelling using elements of an assembled circular lining of a support consists in mining soil with a mechanised shield. Plugging of the space behind the lining is carried out via holes in elements of a tubing support with a grouting mortar. At the initial stage of tunnelling a bottomhole is mined, and a part of the space behind the lining is filled at the length of 0.25-0.75 of the length of the element of the assembled circular lining of the support behind the first ring after the shield in the lining of the tubing support with a long-setting grouting mortar. The next stage of mining at the length of 0.5-1 of the length of the element of the assembled circular lining of the support is carried out with supply of the grouting mortar into the space behind the lining with a setting accelerator. At the stage of process shutdown of a shield for assembly of the next ring of the tubing support, the pressure of the grouting mortar in the space behind the lining behind the first ring after the shield for lining of the tubing support is maintained by means of the long-setting grouting mortar into the area of the section of the space behind the lining, initially filled with the long-setting grouting mortar. Further stages of soil mining and plugging of the space behind the lining are repeated.EFFECT: higher efficiency and improved manufacturability of performed works, reduced labour intensiveness of overcoming emergency situations that occur in process of tunnelling.4 cl