SU969903A1 - Method of strengthening rock area around working - Google Patents

Method of strengthening rock area around working Download PDF

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Publication number
SU969903A1
SU969903A1 SU813267529A SU3267529A SU969903A1 SU 969903 A1 SU969903 A1 SU 969903A1 SU 813267529 A SU813267529 A SU 813267529A SU 3267529 A SU3267529 A SU 3267529A SU 969903 A1 SU969903 A1 SU 969903A1
Authority
SU
USSR - Soviet Union
Prior art keywords
pipe
area around
holes
strengthening
rock area
Prior art date
Application number
SU813267529A
Other languages
Russian (ru)
Inventor
Павел Иванович Сенцов
Афанасий Павлович Коршунов
Original Assignee
Восточный научно-исследовательский горнорудный институт
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Восточный научно-исследовательский горнорудный институт filed Critical Восточный научно-исследовательский горнорудный институт
Priority to SU813267529A priority Critical patent/SU969903A1/en
Application granted granted Critical
Publication of SU969903A1 publication Critical patent/SU969903A1/en

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Description

The invention relates to mining, and in particular to methods of strengthening the rock mass around the mine.

There is a known method of reinforcing rocks, which includes installing a perforated pipe filled with cement paste into the well and squeezing the latter into the hole of the hole by plugging a load-carrying steel rod 1 into the pipe.

However, this method is ineffective, since the strength of pinning is perforated; in the array it is small.

The closest in technical essence and the achieved result to the proposed is a method of strengthening the rock mass around the excavation, including drilling holes, inserting tubular anchors and fixing solution into them, injecting the middle holes into the cracks of the holes with simultaneous flaring of tubular anchors into them. explosive charge in the cavity of each anchor 2.

However, when securing roofing rocks, the known method requires the use of pumps for feeding fixing solution into the holes, as well as devices for sealing the hole mouths.

which leads to an increase in the cost of 1 strength rock mass.

The purpose of the invention is to reduce the cost of strengthening the roof of production.

This goal is achieved in that, according to the method, before inserting the anchor into the hole, the cavity of the anchor tube is filled with a fixing solution and closed on both sides

10 by plugs, and injection of the solution into the rock is carried out through perforations in the pipe of the anchor, which is created by pre-sticking the outer surface of the pipe throughout

15 its length with the Subsequent formation of holes in the pinned points during the blasting of an explosive charge.

The drawing shows the anchor with which the method is carried out

20 strengthening the rock mass around the excavation.

The anchor consists of a length of pipe 1 with tapered along the entire length of the outer surface of the recesses 2, covered with 25 plugs 3, through which the thread 4 of the detonating hole is passed; The cavity of the pipe 1 is filled with a fixing solution, such as cement milk; lump 5 with water / cement ratio

30 () l. Such a composition in a moving fluid is quite fluid and easily fills the pipe stretch without the use of special solution-type superchargers. Moreover, a mobile fluid penetrates better into thin cracks and pores of an array during a short-term explosion - 5th pulse.

Pipe punching is carried out in the mechanic mine using a cylinder-shaped template with holes in the walls. A pipe is fastened in the cylinder and a core is made through holes in the walls using a conical hammer. The recesses are arranged according to a different pattern, depending on the nature of the fracturing of the J5 ruling array. Thus, with a uniform, small-block fracture, the recesses are arranged in a checkerboard pattern. If there are clay layers in the rock, the recesses thicken at the place of “contact of the anchor with these layers. The perforated anchor can be used in the future as a conductor during the cementation of rocks. In order to accelerate the hardening of the liquid cement layer in the gap between the walls of the hole and the pipe, the pipe is covered with a solution of liquid glass before installation. .

Roof hardening technology at the work site includes simple and easy-to-use operations for pouring cement milk into a tubular billet, closing pipe 1 on both sides with stoppers 3,. through which the detonating shura 4 is passed, When detonating a detonating hole is blasting, holes 2 are formed in the holes pinned on the walls of the pipe 1 of the holes 2, which are stress concentrators. Through the formed holes the fixing solution is injected.

cuts into the cracks of the rock mass.

The proposed method is effective for use in various mining and chemical conditions and allows the hardening of rocks without excessive labor costs.

Claims (2)

1. Semevsky V.N. and others. Shankov support. M., Nedra, 1965, pp.44-45.
2. Authors certificate USSR 790448, cl. E 21 D 20/00, 1979 (prototype) ..
SU813267529A 1981-04-01 1981-04-01 Method of strengthening rock area around working SU969903A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU813267529A SU969903A1 (en) 1981-04-01 1981-04-01 Method of strengthening rock area around working

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU813267529A SU969903A1 (en) 1981-04-01 1981-04-01 Method of strengthening rock area around working

Publications (1)

Publication Number Publication Date
SU969903A1 true SU969903A1 (en) 1982-10-30

Family

ID=20950328

Family Applications (1)

Application Number Title Priority Date Filing Date
SU813267529A SU969903A1 (en) 1981-04-01 1981-04-01 Method of strengthening rock area around working

Country Status (1)

Country Link
SU (1) SU969903A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102505687A (en) * 2011-12-13 2012-06-20 江苏建筑职业技术学院 Pre-explosion drilling, grouting and anchoring integrated anchor rod and construction method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102505687A (en) * 2011-12-13 2012-06-20 江苏建筑职业技术学院 Pre-explosion drilling, grouting and anchoring integrated anchor rod and construction method thereof
CN102505687B (en) * 2011-12-13 2014-08-06 江苏建筑职业技术学院 Pre-explosion drilling, grouting and anchoring integrated anchor rod and construction method thereof

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