METHOD FOR CONSTRUCTION OF PREFABRICATED-SOLID SUPPORT OF SHAFT OF MINING ENTERPRISE AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2017 - IPC E21D1/08 

FIELD: mining engineering.

SUBSTANCE: method for constructing prefabricated-solid support of a shaft in the latter includes a process defined interval, the value of which is determined by the total length of the vertical fragments of the tubing string assembled during the time of acquisition of the specified strength properties of the concrete component of the prefabricated solid support. The process determined interval is divided into cuts. Before filling space behind tubing string of each cut with concrete solution, tension of the anchor rods is carried out by pressing of assembled elements of the tubing string to the previously fixed fragment of the tubing string with the total force equal to the total weight of all vertical fragments of the tubing string of the process determined interval and the concrete poured into the space behind tubing string, filling each cut with concrete solution and retaining the tension of the anchor rods in the course of time sufficient for concrete to get the strength, providing retention tension anchor rods due to their adhesion to the concrete monolith. In the device for constructing prefabricated solid support of the shaft, the hydraulic jacks are made with hollow rods and fixed to the mounting frame coaxially to the windows for anchor rods passage, each of which passes through the cavity of its rod and contains at its end the fastening elements of the locking stop interacting with the end of the hollow rod of the hydraulic jack. The latter are made with the possibility of pre-tensioning the anchor rods for the time of assembling the next portion of the tubing string and concreting space behind the tubing string, and then moving together with the mounting frame along the anchor rods.

EFFECT: inventions increase the quality and reliability of the tubing concrete support with its downward erection, the ability of the support to resist multidirectional stresses transmitted from the intersected rock layers increases, and the thickness of its walls decreases, the number of equipment used and its dimensions decreases, the material consumption and the diameter of the shaft development, development rate increases.

7 cl, 5 dwg