SU1481425A1 - Method of supporting mine workings - Google Patents

Abstract

The invention relates to mining and allows to improve the quality of fastening production. In drilled along the contour of the mine workings of the borehole 1 is placed pieces of pipe (FROM) 2. The latter are perforated along the line forming them. Orient the perforation line 3 OT 2 in one direction along the mine. OT 2 is filled with a bonding material (CM). 5. Introduced into OT 2 are charges of explosive (BB). 6. An explosive network is installed. The explosive charges are exploded 6. OT 2 explodes flared. Through the perforation, 3 CM 5 is injected into the rock 7. CM 5 is injected cyclically. For this, OT 2, after the injection of the first portion of the CM 5, refills the CM 5 with explosive charges 6. Then they are blown up again. The operations are repeated until the above modulus of deformation of the hardened layer of rocks is obtained. It is calculated according to the proposed calculation formula. In the production of works initially injected cement and cement-clay slurry. Then, colloidal solutions based on mineral and organic substances are injected. At the final stage, the true binder solutions based on synthetic resins that are expanding during hardening are injected. This order of injection is necessary for filling, first large, then medium and, at the final stage, small cracks. 3 il.

Description

FIELD OF THE INVENTION The invention relates to mining, in particular to methods for securing mining.

The purpose of the invention is to improve the quality of fastening production.

Fig. 1 shows a well with a pipe placed in it in FIG. 2 - section A-A in FIG. 1; Fig. 3 is a diagram of the placement of wells with pipes in the mine making,

The process technology is as follows:

Along the contour of the mine workings, drill holes 1. They place sections of pipes 2 in such a way that the perforation line 3, which is made along forming pipe 2, is oriented in one direction (right or left) along production. Next, fill the cavity of pipes 2 The explosive material 6 is inserted into the pipe 2 and the explosive network is then mounted and the explosive charges 6 o are exploded. Under the action of explosive energy | Ba, the pipes 2 are flared, and through the perforation 3 the binder 5 penetrates into the pores and cracks Breed 7 o Forcing with The binder material 5 is carried out cyclically. To do this, after the first batch of binder material 5 is injected, the pipes are refilled with binder material 5 with explosive charges 6 and they are blown up again. The operations are repeated until the reduced deformation modulus formula

jnf

-E (1+. W

where Епр is the reduced modulus of deformation of the hardened layer of rocks, MPa; Е - modulus of rock deformation,

t &

Е (- modulus of deformation of the bonding material, MPa, / U - Poisson's ratio, 8 - density of saturation of the rock

bonding material

In the course of work, cement and cement-clay slurries are initially injected to fill large cracks and pores at the beginning.

rocks with cheaper binder compositions. Then, colloidal solutions based on mineral and organic substances are injected to fill medium pores and cracks in the rock. At the final stage, synthetic resin-based binding solutions that expand during hardening are filled to fill the smallest pores and cracks in breed

Claims (1)

Invention Formula A method of securing mine workings, including drilling wells in the rock along the contour of the mine, placing sections of perforated pipes in them, filling their cavity with binder material, introducing explosive charges, followed by /