CN113818924A - Layered backfill compacting method for dolomite tailing pit - Google Patents
Layered backfill compacting method for dolomite tailing pit Download PDFInfo
- Publication number
- CN113818924A CN113818924A CN202110736423.XA CN202110736423A CN113818924A CN 113818924 A CN113818924 A CN 113818924A CN 202110736423 A CN202110736423 A CN 202110736423A CN 113818924 A CN113818924 A CN 113818924A
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- Prior art keywords
- backfilling
- pit
- stones
- grain size
- layered
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
Abstract
The invention belongs to the technical field of mine restoration, and discloses a layered backfilling and compacting method for a dolomite tailing pit, which solves the problems that the overall structure stability of a field is not high, the field is easy to sink and collapse, geological disasters are easy to occur and the like after the existing pit is backfilled and compacted. The invention comprises the following steps: (1) selecting graded stones with the grain size of less than or equal to 50cm for backfilling; (2) spreading upward from the bottom of the backfill pit in a layered manner; (3) and (5) rolling each layer by using a vibration roller at 15-30t after paving. According to the layered backfilling compaction method for the dolomite tailing pit, the backfilling compaction degree is guaranteed by optimizing the components of the graded stone and adopting a layered paving mode, the overall structural stability of the field can be improved in large-area backfilling compaction of the pit, a backfilling area cannot sink and collapse, and geological disasters are avoided.
Description
Technical Field
The invention belongs to the technical field of mine restoration, and particularly relates to a layered backfill compacting method for a dolomite tailing pit.
Background
After the surface mine stops mining, a lot of geological environment problems can be left:
firstly, a large amount of land is dug and damaged in the mining process, so that the ground surface is seriously collapsed or dislocated to form ground cracks or pits, the physical and chemical properties of the soil in the pits are seriously damaged, and the soil structure in the pits is no longer suitable for the growth and development of plants; secondly, the slope formed by surface mining mines has generally larger gradient, a plurality of steep slopes are left, and the hidden danger of collapse geological disasters exists due to the influence of factors such as structure, weathering and blasting mining; thirdly, in the process of mining, due to long-term stacking of slag and tailings, the slag is easy to cause debris flow, and harm is caused to surrounding roads and fertile farmlands; in addition, the destruction of the aquifer and the destruction of the landform landscape, etc.
At present, most of backfilling is to directly dump materials into a pit, the material gap is large, the compactness is not enough, the field stability is poor, and the materials are easy to sink and collapse to cause geological disasters.
For example, patent application No. 201310093539.1 discloses a construction method for backfilling and compacting desert silty soil by uniformly mixing backfilled soil with water. Firstly, a land leveler with a rear hook is used for pulling a groove on soil of a roadbed, a waterwheel sprays water on the surface of the soil pulled by the land leveler to enable the water to seep into the soil and then ploughs the soil, firstly, the soil in the middle of the roadbed is ploughed towards one side where the waterwheel is located, the soil in the middle is ploughed to form a groove, and the water is sprayed and evenly mixed; secondly, ploughing and mixing the soil close to one side of the waterwheel to the middle; thirdly, ploughing the soil from the opposite side of the waterwheel to the side close to the waterwheel, and watering and mixing the dry part of the bottom layer of the roadbed.
The patent with the application number of 201811457790.0 discloses a foundation soil backfilling and compacting device and a compacting method for geological drilling, wherein the device comprises a balance weight, a soil barrel and a pipe shoe, and the top of the balance weight is connected with a rope winch through a traction wire; the inner cavity of the soil barrel is provided with a plurality of loose-leaf plates at intervals along the axial direction, the hinged end of each loose-leaf plate is hinged with the inner wall of one side of the soil barrel, and the movable end of each loose-leaf plate is locked by a spring buckle arranged on the inner wall of the other side of the soil barrel; the bottom of the pipe boot is provided with a hinge bottom plate, the hinge end of the hinge bottom plate is hinged with the inner wall of one side of the bottom of the pipe boot, and the other end of the hinge bottom plate is locked through a spring buckle; the spring buckle is connected with the rope winch through a lifting wire penetrating through the side wall of the soil barrel or the pipe boot.
It can be seen that the existing backfill compaction technology is much more updated by improving the compaction equipment. The research on the compaction method is less, a backfill compaction method aiming at the mine pit is not adopted, the improvement of the construction method can be carried out by adopting the existing machinery, and the cost of the improved machinery is saved. Therefore, how to improve the prior art, promote the place stability, avoid geological disasters is the technological problem who needs to solve urgently in the pit backfill.
Disclosure of Invention
The invention provides a layered backfilling and compacting method for a dolomite tailing pit, which aims to solve the problems that the overall structure stability of a field is not high, the field is easy to sink and collapse, geological disasters are easy to occur and the like after the existing pit is backfilled and compacted.
In order to solve the technical problem, the technical scheme adopted by the invention is as follows:
a layered backfill compacting method for a dolomite tailing pit is characterized by comprising the following steps:
(1) selecting graded stones with the grain size of less than or equal to 50cm for backfilling;
(2) spreading upward from the bottom of the backfill pit in a layered manner;
(3) and (5) rolling each layer by using a vibration roller at 15-30t after paving.
In some embodiments, the graded stone material consists of the following raw materials in parts by weight:
25-35 parts of stone with the grain diameter of 0-10 cm;
55-65 parts of stone with the grain diameter of 10-20 cm;
0 to 20 portions of stone with the grain diameter of 20 to 50 cm.
In some embodiments, the layered paving has a thickness of 1-1.5m for each layer of the paving.
In some embodiments, the vibratory mill rolls each layer 3-8 times.
Compared with the prior art, the invention has the following beneficial effects:
according to the layered backfilling compaction method for the dolomite tailing pit, the backfilling compaction degree is guaranteed by optimizing the components of the graded stone and adopting a layered paving mode, the overall structural stability of the field can be improved in large-area backfilling compaction of the pit, a backfilling area cannot sink and collapse, and geological disasters are avoided.
If the proportion of the stone material with the grain diameter of 0-10cm in the graded stone material is less than 25 parts, the compacted backfill layer has too many gaps; if the proportion of the stones with the grain diameter of 10-20cm is less than 55 parts, the compacted backfill layer has too many gaps; if the proportion of the stones with the grain size of 20-50cm is more than 20 parts, the surface layer is influenced when the stones are compacted and leveled, and the compactness is influenced.
If the tonnage of the vibration mill is less than 15t, the compaction can not be achieved, and the gaps are too much; if it is more than 30t, the stone is easily crushed and pulverized, and a reverse slurry phenomenon may occur. If the rolling times are less than 3, the field compactness is not enough, and the void ratio is large; if the number of times is more than 8, the field is compacted, and then rolling is ineffective, so that resources are wasted.
Detailed Description
The present invention will be further described with reference to the following examples, which are intended to illustrate only some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, other embodiments used by those skilled in the art without any creative effort belong to the protection scope of the present invention.
The invention relates to a layered backfilling and compacting method of a dolomite tailing pit, which comprises the following steps:
(1) selecting graded stones with the grain size of less than or equal to 50cm for backfilling;
(2) spreading upward from the bottom of the backfill pit in a layered manner;
(3) and (5) rolling each layer by using a vibration roller at 15-30t after paving.
In some embodiments, the graded stone material consists of the following raw materials in parts by weight:
25-35 parts of stone with the grain diameter of 0-10 cm;
55-65 parts of stone with the grain diameter of 10-20 cm;
0 to 20 portions of stone with the grain diameter of 20 to 50 cm.
In some embodiments, the layered paving has a thickness of 1-1.5m for each layer of the paving.
In some embodiments, the vibratory mill rolls each layer 3-8 times.
Example 1
Selecting graded stones with the grain size less than or equal to 50cm for backfilling, wherein 35 parts of stones with the grain size of 0-10cm, 60 parts of stones with the grain size of 10-20cm and 5 parts of stones with the grain size of 20-50cm are paved upwards in layers from the bottom of a backfilling pit, the thickness of each layer is 1.5m, and the layers are ground and rolled for 8 times by 30t vibration after paving.
The compaction of this example after backfilling compaction was 93.4%.
Example 2
Selecting graded stones with the grain size of less than or equal to 50cm for backfilling, wherein the proportion of the stones with the grain size of 0-10cm is 25 parts, the proportion of the stones with the grain size of 10-20cm is 60 parts, the proportion of the stones with the grain size of 20-50cm is 15 parts, upward layering and paving from the bottom of a backfilling pit, wherein the thickness of each layer is 1.5m, and vibrating and grinding for 8 times after paving.
The example was backfilled and compacted to a compaction of 91.6%.
Example 3
Selecting graded stones with the grain size of less than or equal to 50cm for backfilling, wherein the proportion of the stones with the grain size of 0-10cm is 25 parts, the proportion of the stones with the grain size of 10-20cm is 55 parts, the proportion of the stones with the grain size of 20-50cm is 20 parts, upward layering and paving from the bottom of a backfilling pit, wherein the thickness of each layer is 1.5m, and vibrating and grinding for 8 times by 30t after paving.
The example was backfilled and compacted to a compaction of 88.4%.
Example 4
Selecting graded stones with the grain size of less than or equal to 50cm for backfilling, wherein the proportion of the stones with the grain size of 0-10cm is 30 parts, the proportion of the stones with the grain size of 10-20cm is 65 parts, the proportion of the stones with the grain size of 20-50cm is 5 parts, upward layering and paving from the bottom of a backfilling pit, wherein the thickness of each layer is 1.5m, and vibrating and grinding for 8 times by 30t after paving.
The compaction of this example was 94.1% after backfilling compaction.
Example 5
Selecting graded stones with the grain size of less than or equal to 50cm for backfilling, wherein the proportion of the stones with the grain size of 0-10cm is 30 parts, the proportion of the stones with the grain size of 10-20cm is 65 parts, the proportion of the stones with the grain size of 20-50cm is 5 parts, upward layering and paving from the bottom of a backfilling pit, wherein the thickness of each layer is 1m, and vibrating and grinding for 8 times by 30t after paving.
The compaction of this example was 94.4% after backfilling compaction.
Example 6
Selecting graded stones with the grain size of less than or equal to 50cm for backfilling, wherein the proportion of the stones with the grain size of 0-10cm is 30 parts, the proportion of the stones with the grain size of 10-20cm is 65 parts, the proportion of the stones with the grain size of 20-50cm is 5 parts, upward layering and paving from the bottom of a backfilling pit, wherein the thickness of each layer is 1m, and vibrating and grinding for 8 times by 15t after paving.
The example was backfilled and compacted to a compaction of 92.6%.
Example 7
Selecting graded stones with the grain size of less than or equal to 50cm for backfilling, wherein the proportion of the stones with the grain size of 0-10cm is 30 parts, the proportion of the stones with the grain size of 10-20cm is 65 parts, the proportion of the stones with the grain size of 20-50cm is 5 parts, upward layering and paving from the bottom of a backfilling pit, wherein the thickness of each layer is 1m, and vibrating and grinding for 3 times by 15t after paving.
The compaction of this example was 90.1% after backfilling compaction.
Example 8
Selecting graded stones with the grain size of less than or equal to 50cm for backfilling, wherein the proportion of the stones with the grain size of 0-10cm is 30 parts, the proportion of the stones with the grain size of 10-20cm is 65 parts, the proportion of the stones with the grain size of 20-50cm is 5 parts, upward layering and paving from the bottom of a backfilling pit, wherein the thickness of each layer is 1m, and vibrating and grinding for 3 times by 30t after paving.
The example was backfilled and compacted to a compaction of 92.2%.
Example 9
Selecting graded stones with the grain size of less than or equal to 50cm for backfilling, wherein the proportion of the stones with the grain size of 0-10cm is 25 parts, the proportion of the stones with the grain size of 10-20cm is 55 parts, the proportion of the stones with the grain size of 20-50cm is 20 parts, upward layering and paving from the bottom of a backfilling pit, wherein the thickness of each layer is 1m, and vibrating and grinding for 3 times by 30t after paving.
The compaction of this example after backfilling compaction was 87.5%.
Example 10
Selecting graded stones with the grain size less than or equal to 50cm for backfilling, wherein the proportion of the stones with the grain size less than or equal to 50cm is 25 parts, the proportion of the stones with the grain size less than or equal to 10cm is 55 parts, the proportion of the stones with the grain size less than or equal to 20 parts is 20 parts, upward layering and paving from the bottom of a backfilling pit, wherein the thickness of each layer is 1m, and vibrating and grinding for 3 times by 15t after paving.
The present example was backfilled and compacted to a compaction of 85.8%.
Example 11
Selecting graded stones with the grain size of less than or equal to 50cm for backfilling, wherein the proportion of the stones with the grain size of 0-10cm is 25 parts, the proportion of the stones with the grain size of 10-20cm is 55 parts, the proportion of the stones with the grain size of 20-50cm is 20 parts, upward layering and paving from the bottom of a backfilling pit, wherein the thickness of each layer is 1m, and vibrating and grinding for 5 times by using 20t after paving.
The example was backfilled and compacted to a compaction of 88.3%.
Example 12
Selecting graded stones with the grain size of less than or equal to 50cm for backfilling, wherein 35 parts of stones with the grain size of 0-10cm, 65 parts of stones with the grain size of 10-20cm and 0 part of stones with the grain size of 20-50cm are paved upwards in layers from the bottom of a backfilling pit, the thickness of each layer is 1m, and after paving, 30t of vibration grinding is carried out for 8 times.
The compaction of this example was 95.8% after backfilling compaction.
Example 13
Selecting graded stones with the grain size of less than or equal to 50cm for backfilling, wherein 35 parts of stones with the grain size of 0-10cm, 65 parts of stones with the grain size of 10-20cm and 0 part of stones with the grain size of 20-50cm are paved upwards in layers from the bottom of a backfilling pit, the thickness of each layer is 1m, and after paving, 25t of vibration grinding is carried out for 8 times.
The compaction of this example was 95.2% after backfilling compaction.
Example 14
Selecting graded stones with the grain size of less than or equal to 50cm for backfilling, wherein 35 parts of stones with the grain size of 0-10cm, 65 parts of stones with the grain size of 10-20cm and 0 part of stones with the grain size of 20-50cm are paved upwards in layers from the bottom of a backfilling pit, each layer is 1m in thickness, and after paving, the materials are ground and rolled for 3 times by 25t vibration.
The compaction of this example after backfilling compaction was 93.4%.
Claims (4)
1. A layered backfill compacting method for a dolomite tailing pit is characterized by comprising the following steps:
(1) selecting graded stones with the grain size of less than or equal to 50cm for backfilling;
(2) spreading upward from the bottom of the backfill pit in a layered manner;
(3) and (5) rolling each layer by using a vibration roller at 15-30t after paving.
2. The dolomite tailing pit layered backfilling and compacting method according to claim 1, wherein the graded stone material is composed of the following raw materials in parts by weight:
25-35 parts of stone with the grain diameter of 0-10 cm;
55-65 parts of stone with the grain diameter of 10-20 cm;
0 to 20 portions of stone with the grain diameter of 20 to 50 cm.
3. The dolomite tailing pit layered backfilling and compacting method according to claim 1, wherein the thickness of each layer of layered paving is 1-1.5 m.
4. The dolostone tailing pit layered backfilling and compacting method according to claim 1, wherein the vibration roller presses each layer 3-8 times.
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| CN202110736423.XA CN113818924A (en) | 2021-06-30 | 2021-06-30 | Layered backfill compacting method for dolomite tailing pit |
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| CN202110736423.XA CN113818924A (en) | 2021-06-30 | 2021-06-30 | Layered backfill compacting method for dolomite tailing pit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114482062A (en) * | 2022-01-06 | 2022-05-13 | 兰州有色冶金设计研究院有限公司 | Underground mining metal mine collapse pit repairing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713291A (en) * | 2009-12-09 | 2010-05-26 | 煤炭科学研究总院唐山研究院 | Filling-reclaiming method for building land in coal mining subsidence areas |
| CN103758108A (en) * | 2014-01-02 | 2014-04-30 | 山西省第二建筑工程公司 | Foundation treatment method using coal gangue |
| CN110777819A (en) * | 2019-11-07 | 2020-02-11 | 山西大地民基生态环境股份有限公司 | High and steep mine mountain reconstruction ecological restoration method |
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2021
- 2021-06-30 CN CN202110736423.XA patent/CN113818924A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713291A (en) * | 2009-12-09 | 2010-05-26 | 煤炭科学研究总院唐山研究院 | Filling-reclaiming method for building land in coal mining subsidence areas |
| CN103758108A (en) * | 2014-01-02 | 2014-04-30 | 山西省第二建筑工程公司 | Foundation treatment method using coal gangue |
| CN110777819A (en) * | 2019-11-07 | 2020-02-11 | 山西大地民基生态环境股份有限公司 | High and steep mine mountain reconstruction ecological restoration method |
Non-Patent Citations (1)
| Title |
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| 黄晓明等: "《公路施工（第二版）》", vol. 2011, 西南交通大学出版社, pages: 159 - 161 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114482062A (en) * | 2022-01-06 | 2022-05-13 | 兰州有色冶金设计研究院有限公司 | Underground mining metal mine collapse pit repairing method |
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