SU929863A1 - Mine roof support erecting method - Google Patents
Mine roof support erecting method Download PDFInfo
- Publication number
- SU929863A1 SU929863A1 SU802996143A SU2996143A SU929863A1 SU 929863 A1 SU929863 A1 SU 929863A1 SU 802996143 A SU802996143 A SU 802996143A SU 2996143 A SU2996143 A SU 2996143A SU 929863 A1 SU929863 A1 SU 929863A1
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- SU
- USSR - Soviet Union
- Prior art keywords
- rods
- concrete
- lining
- anchors
- tension
- Prior art date
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- Lining And Supports For Tunnels (AREA)
Description
(54) СПОСОБ ВОЗВЕДЕНИЯ ШАХТНОЙ КРЕПИ(54) METHOD FOR CONSTRUCTION OF MINE STRAP
1one
Изобретение относитс к горнодобывающей промышленности, а именно к способам возведени шахтной крепи.FIELD OF THE INVENTION The invention relates to the mining industry, in particular to methods for the erection of shaft lining.
Известен способ возведени шахтной крени, включающий установку железобетонных анкеров, прот гивание через арматуру 5 анкеров и нат жение каната и нанесение набрызго-бетонного покрыти 1.A known method of erecting a mine roll includes installing reinforced concrete anchors, pulling 5 anchors through reinforcement and tensioning the rope and applying a spray-concrete coating 1.
Недостатками такого способа вл ютс значительный расход арматуры и недоста- ю точно эффективное использование ее несущей способности.The disadvantages of this method are the significant consumption of reinforcement and the lack of precisely efficient use of its carrying capacity.
Наиболее близким к изобретению по технической сущности вл етс способ возведени шахтной крепи, включающий установку металлической арматурной сетки из прутьев и анкеров дл ее прикреплени к породному массиву, предварительное нат жение прутьев сетки и нанесение на нее сло набрызг-бетона 2.20The closest to the invention to the technical essence is the method of erection of shaft lining, including the installation of a metal reinforcing mesh of rods and anchors for attaching it to the rock mass, pre-tensioning the rods of the net and applying a layer of concrete 2.20 onto it.
Недостатками известного способа вл ютс значительный расход арматуры, а также невозможность получени высокой несущей способности крепи.The disadvantages of this method are the significant consumption of reinforcement, as well as the impossibility of obtaining a high bearing capacity of the lining.
Целью изобретени вл етс повыщение несущей способности крепи и сокращение металлоемкости.The aim of the invention is to increase the carrying capacity of the support and reduce the metal consumption.
Поставленна цель достигаетс тем, что производ т отпуск нат жени прутьев после достижени набрызг-бетоном 70% проектной прочности.This goal is achieved by releasing the tension of the rods after the sprayed concrete reaches 70% of the design strength.
При этом дл предварительного нат жени прутьев, а также отпуска их нат жени используют анкеры.In this case, anchors are used to pre-tension rods, as well as to release their tension.
На чертеже изображена горна выработка , закрепленна предлагаемым способом , продольный разрез.The drawing shows the hearth development, fixed by the proposed method, a longitudinal section.
Технологи способа включает установку штанг 1-9, установку и предварительное нат жение отдельных прутьев 10 арматурной сетки, нанесение набрызг-бетонного покрыти И и отпуск нат жени прутьев 10. Нат жение прутьев 10 осуществл ют первоначально фаркопфом 12, а окончательно - штангами 1-9. Дл фиксации установки прутьев 10 относительно контура горной выработки 13 примен ют подкладки 14. После набора набрызг-бетоном 70% проектной прочности с помощью .штанг 2-3 предварительное нат жение прутьев 10 отпускают . После сн ти нат жени пруть сжимаютс , вызыва соответствующие усили сжати в раст нутой зоне набрызг-бетонного покрыти 15 и усили раст жени в зоне сжати 16. Анкерную крепь устанавливают по окончании выемки очередной заходки, а предварительно напр женные элементы крепи устанавливают с отставанием от груди забо 10-15 м участками длиной не менее 2 м.The technology of the method includes installation of rods 1–9, installation and pre-tensioning of individual rods 10 of the reinforcement mesh, applying a spray-concrete coating AND and releasing the rods ten. 10. Tensioning of rods 10 is carried out initially by the tow bar 12, and finally by rods 1–9. . To fix the installation of the rods 10 relative to the contour of the mine workings 13, the pads 14 are used. After the concrete has been sprayed with 70% of the design strength with the bars 2-3, the prestressing of the rods 10 is released. After the tension is removed, the rods are compressed causing the corresponding compressive forces in the stretched zone of the sprayed concrete coating 15 and the tensile forces in the compression zone 16. The anchor lining is installed at the end of the next excavation, and the pre-stressed lining elements are set behind the chest 10-15 m slab areas of at least 2 m.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU802996143A SU929863A1 (en) | 1980-08-04 | 1980-08-04 | Mine roof support erecting method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU802996143A SU929863A1 (en) | 1980-08-04 | 1980-08-04 | Mine roof support erecting method |
Publications (1)
Publication Number | Publication Date |
---|---|
SU929863A1 true SU929863A1 (en) | 1982-05-23 |
Family
ID=20923045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU802996143A SU929863A1 (en) | 1980-08-04 | 1980-08-04 | Mine roof support erecting method |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU929863A1 (en) |
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1980
- 1980-08-04 SU SU802996143A patent/SU929863A1/en active
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