CN113700481A - Zonal control filling continuous mining method for isolating ore pillars in underground goaf panel area - Google Patents
Zonal control filling continuous mining method for isolating ore pillars in underground goaf panel area Download PDFInfo
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- CN113700481A CN113700481A CN202111084887.3A CN202111084887A CN113700481A CN 113700481 A CN113700481 A CN 113700481A CN 202111084887 A CN202111084887 A CN 202111084887A CN 113700481 A CN113700481 A CN 113700481A
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- 238000005065 mining Methods 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000005422 blasting Methods 0.000 claims abstract description 16
- 238000002955 isolation Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000005553 drilling Methods 0.000 claims description 15
- 239000004746 geotextile Substances 0.000 claims description 15
- 239000011435 rock Substances 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 239000002002 slurry Substances 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 239000011378 shotcrete Substances 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims 1
- 238000005192 partition Methods 0.000 abstract description 3
- 238000005520 cutting process Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 2
- 239000011707 mineral Substances 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 3
- 239000004567 concrete Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses a zonal controlled filling continuous mining method for an isolation ore pillar of an underground goaf panel, which is a safe, efficient and continuous stoping method for carrying out zonal filling on an isolation ore pillar of the same panel in a goaf firstly and forming an unfilled free surface for a later stoping unit. The invention utilizes modern mechanical equipment and material technology to control and fill the goaf in the short axis direction in an isolated partition mode, and the unfilled goaf is used as a blasting free surface of a stoping unit of a ore pillar of a subsequent panel area, so that continuous and efficient mining of the ore pillar of the panel area is formed. The method has the advantages of simplified mining and cutting arrangement, less engineering quantity and simplified blasting procedure, and has high mining rate of mineral resources.
Description
Technical Field
The invention relates to the field of zonal filling and panel isolation pillar mining of a goaf in a metal mine, in particular to a zonal filling continuous efficient mining method for panel isolation pillars reserved for partitioning a panel of a metal ore deposit.
Background
Mining methods adopted by mining large-scale super-huge type deep-buried metal ore deposits with different inclination angles are different according to mining equipment and ore body occurrence conditions, and mining of the divided panel areas is popularized and applied with the advantages of high efficiency, good safety and the like. In order to prevent the stoping units from being interfered with each other, the panel area pillars are inevitably reserved between the panels, and the stoping rate of the pillars serving as residual ore resources is generally lower than 60 percent.
The size of the ore pillar is determined by engineering requirements and rock mechanical properties, and the ore pillar accounts for 18-20% of the total resource amount. In order to fully utilize resources, control ground pressure and reduce or avoid secondary geological disasters, stope goafs in the panel area are filled, and conditions are provided for mining ore pillars in the panel area. The two sides of the ore pillars in the panel area are replaced by filling bodies with much lower strength instead of primary rock masses, the engineering geological conditions of the ore pillars are affected by early mining blasting vibration, stress concentration and the like and are also deteriorated to different degrees, and the mining conditions are much lower than those of an early normal mining stope, so that the mining method of the ore pillar resources in the panel area is limited.
Mining methods adopted by mining pillars of the panel area generally comprise an upward layered filling method and a route method, and the mining methods have good mining safety but low efficiency; if the hollow or deep hole ore falling open-stope subsequent filling method which is basically the same as that of a normal stope is adopted for mining, after ore extraction and filling of one ore pillar stope are finished, the subsequent stope needs to be drawn again to realize low recovery efficiency, and the productivity cannot meet the production requirements of mines.
Disclosure of Invention
The invention aims to solve the defects of the prior art, and provides a safe and efficient continuous stoping method for performing zonal filling on a first goaf of an isolation ore pillar in the same panel area and forming an unfilled free surface for a later stoping unit.
The technical scheme adopted by the invention is as follows: the zonal control filling continuous mining method for isolating ore pillars in the underground goaf panel area is characterized by comprising the following steps of: s1, separating the pillars along the panel area into a plurality of mining units with the length not more than 50m, wherein the width of the mining units is the thickness of the pillars, and mining is carried out in a backward mode from one side to the other side among different mining units; s2, reserving a mine wall with the length of 12m and the thickness of not less than 2m between adjacent mining units as permanent loss; s3, firstly, adopting deep holes for ore falling in the mining unit, wherein the hole diameter is 165mm, the hole depth is 50-60mm of the height of the mining section, the trench is subjected to ore, and the trackless scraper is used for ore removal; s4, when the mining of the first mining and stoping unit is finished and a large amount of ore is removed, constructing a filling measure roadway and a filling chamber of a rock drilling chamber and a positive ore removal and stoping unit of a subsequent mining and stoping unit; s5, after the stoping of the first stoping unit is finished, separating the goaf into two goafs with different sizes by adopting high-strength geotextile; s6, drilling a fixed anchor rod in the filling chamber at one side, fixing a connecting steel rope on the fixed anchor rod, fixing a complete geotextile on the connecting steel rope, and drawing the connecting steel rope into the filling chamber at the other side for fixing by adopting a mechanical arm arranged on an anchor rod trolley; s7, carrying out cemented filling on the large empty area by adopting high-concentration tailing filling slurry added with a cementing material, wherein the strength of a filling body meets the safe mining requirement of adjacent stoping units and is not less than 1.5 MPa; s8, filling 1m, solidifying the filling material to integrate the high-strength geotextile and the empty area bottom plate, forming a permeable sand-separating wall, filling normally, wherein the filling height is not higher than 3m, and filling after solidification until the filling is finished; and S9, after the goaf subarea filling of the first mining unit is finished and the maintenance period is reached, blasting and ore falling of blasting blastholes constructed in the rock drilling chamber of the subsequent mining unit, and entering the next mining unit for mining.
As a further improvement of the invention, in the step S5, after the stoping of the first stoping unit is finished, the goaf is isolated into two goafs with different sizes of 45m and 5m by adopting high-strength geotextile.
As a further improvement of the invention, in the step S7, full-tailings cemented filling is adopted for large empty areas to limit the displacement of surrounding rock masses and filling bodies and control the ground pressure.
As a further improvement of the invention, in the step S4, when the filling measure roadway and the filling chamber are constructed in the filling body in the previous period, anchor net shotcrete support is required.
As a further improvement of the invention, in the step S9, blasting blastholes for subsequent mining unit drilling chamber construction blast ore falling with small empty areas as free surfaces, so as to realize continuous mining of the isolated pillars in the panel area.
The invention has the following beneficial effects: the invention utilizes modern mechanical equipment and material technology to control and fill the goaf in the short axis direction in an isolated partition mode, and the unfilled goaf is used as a blasting free surface of a stoping unit of a ore pillar of a subsequent panel area, so that continuous and efficient mining of the ore pillar of the panel area is formed. The method has the advantages of simplified mining and cutting arrangement, less engineering quantity and simplified blasting procedure, and has high mining rate of mineral resources.
Drawings
FIG. 1 is a plan view of the panel isolation pillars of the present invention;
FIG. 2 is a cross-sectional view of the isolated pillars of FIG. 1 taken along the panel area (section II-II of FIG. 1);
FIG. 3 is a cross-sectional view of the vertical panel area isolated pillar of FIG. 1 (cross-sectional view III-III of FIG. 1);
fig. 4 is a schematic view of a continuous recovery unit.
Shown in the figure: the method comprises the following steps of 1, first mining and stoping units, 2 geotextile, 3, reserved unfilled dead areas, 4 permanent mine walls, 5 filling chambers, 6 fixing anchor rods, 7 filling measure roadways, 8 subsequent stoping units, 9 drilling chambers, 10 panel inner first goaf filling bodies, 11 panel inner secondary goaf filling bodies, 12 ore pillar postmining filling bodies, 13 trenches and 14 blasting blastholes.
Detailed Description
The present invention will be further described with reference to fig. 1 to 4.
The zonal control filling continuous mining method for isolating ore pillars in the underground goaf panel area comprises the following steps:
s1, dividing the panel area isolation pillars into a plurality of mining units along the long axis direction of the panel area pillars, determining the mining sequence of the mining units by the existing engineering, and mining in a retreating mode from one side to the other side;
s2, firstly mining the recovery unit 1, and reserving a permanent mine wall 4 with a certain width at the intersection of the recovery unit and the subsequent recovery unit; and firstly, reserving a protective ore wall with the length of not less than 12m and the thickness of 2m for the stoping unit so as to ensure the operation safety of the operation personnel and equipment in the filling chamber.
S3, the mining and stoping unit 1 adopts deep hole ore falling, the trench 13 receives ore, and the trackless scraper removes ore;
s4, when the stoping unit is mined out, projects such as a rock drilling chamber 9, a filling measure roadway 7, a filling chamber 5 and the like of a subsequent stoping unit 8 are constructed at the same time;
s5, after the first mining and stoping unit finishes mining, the goaf is filled in an isolation partition mode;
s6, constructing and filling a fixed anchor rod 6 in a filling chamber 4, fixing a traction steel rope on the chamber fixed anchor rod 6 on one side, uniformly fixing high-strength geotextile 2 on the steel rope, adopting a manipulator additionally arranged on an anchor rod trolley to draw one end of the steel rope to the filling chamber on the other side to be fixed on the anchor rod, uniformly distributing the high-strength geotextile 2 on the vertical surface of the goaf, being not more than 5m away from a subsequent stoping unit, and dividing the goaf into a large goaf and a small goaf;
s7, filling a large goaf by adopting high-concentration full-tailing cemented filling slurry;
s8, filling the earthwork cloth 2 with the thickness of about 1m to be fixedly connected with the goaf bottom plate, and forming a permeable sand control isolation layer by using the high-strength earthwork cloth;
and S9, performing normal cemented filling on the large goaf until the curing period is over, forming a cemented filling body meeting the requirement of the rear strength, wherein the small goaf is a mining blasting free surface of a pillar mining unit of a subsequent panel area, and the next operation cycle is formed by the adjacent pillar mining unit and the mining filling.
Selected embodiments are further explained in order to further enhance understanding.
Embodiment 1, the zonal controlled filling continuous mining method of the isolating pillar of the panel zone of the underground goaf, S1, along the direction of the isolating pillar of the panel zone, dividing the mining unit into mining units with the length not more than 50m, the width is the thickness of the pillar, mining from one side to the other side in a retreating way among different mining units; s2, reserving a mine wall with the length of 12m and the thickness of 2m at the adjacent position of the first mining unit and the subsequent mining unit as permanent loss; s3, firstly, adopting deep holes for ore falling in the mining unit, wherein the hole diameter is 165mm, the hole depth is 50-60mm of the height of the mining section, the trench 13 is subjected to ore, and the trackless scraper is used for ore removal; s4, stopping mining of the first mining and stoping unit, and constructing a rock drilling chamber of the subsequent stoping unit and a filling measure roadway and a filling chamber of the stoping unit of the positive ore removal when a large amount of ore is removed; s5, after the stoping of the first stoping unit is finished, adopting high-strength geotextile 2 to isolate the goaf into two goafs with different sizes of 45m and 5m, and carrying out water penetration and sand prevention on the geotextile; s6, drilling a fixed anchor rod in the filling chamber at one side, fixing a connecting steel wire rope, fixing a complete geotextile on the connecting steel wire rope, and drawing the connecting steel wire rope into the filling chamber at the other side for fixing by adopting a mechanical arm arranged on an anchor rod trolley; s7, carrying out cemented filling on the large empty area by adopting high-concentration tailing filling slurry added with a cementing material to limit the displacement of peripheral rock masses and a filling body and control the ground pressure, wherein the strength of the filling body meets the safe mining requirement of adjacent stoping units and is not less than 1.5 MPa; s8, filling 1m, solidifying the filling material to integrate the high-strength geotextile and the empty area bottom plate, forming a permeable sand-separating wall, filling normally, wherein the filling height is not higher than 3m, and filling after solidification until the filling is finished; and S9, after the goaf subarea filling of the previous stoping unit is finished and the maintenance period is reached, blasting ore falling is carried out by the blasting blast hole 14 constructed in the subsequent stoping unit rock drilling chamber 9 by taking the small subarea goaf 3 as a free surface, and the next stoping unit is mined. Wherein the mining, rock drilling and blasting of the ore columns in the panel area are ventilated by filling and drilling holes; the roadway engineering of the construction in the cemented filling body adopts anchor net concrete spraying or concrete casting support. According to the invention, the separated pillars in the same panel area are filled in different areas, wherein the small goaf is an unfilled free surface formed by the pillar stoping unit in the secondary panel area, so that the purpose of continuous mining is realized.
It should be understood by those skilled in the art that the protection scheme of the present invention is not limited to the above-mentioned embodiments, and various permutations, combinations and modifications can be made on the above-mentioned embodiments without departing from the spirit of the present invention, and the modifications are within the scope of the present invention.
Claims (5)
1. The zonal control filling continuous mining method for isolating ore pillars in the underground goaf panel area is characterized by comprising the following steps of:
s1, separating the pillars along the panel area into a plurality of mining units with the length not more than 50m, wherein the width of the mining units is the thickness of the pillars, and mining is carried out in a backward mode from one side to the other side among different mining units;
s2, reserving a mine wall with the length of 12m and the thickness of not less than 2m between adjacent mining units;
s3, firstly, adopting deep holes for ore falling in the mining unit, wherein the hole diameter is 165mm, the hole depth is 50-60mm of the height of the mining section, the trench is subjected to ore, and the trackless scraper is used for ore removal;
s4, when the mining of the first mining and stoping unit is finished and a large amount of ore is removed, constructing a filling measure roadway and a filling chamber of a rock drilling chamber and a positive ore removal and stoping unit of a subsequent mining and stoping unit;
s5, after the stoping of the first stoping unit is finished, separating the goaf into two goafs with different sizes by adopting high-strength geotextile;
s6, drilling a fixed anchor rod in the filling chamber at one side, fixing a connecting steel rope on the fixed anchor rod, fixing a complete geotextile on the connecting steel rope, and drawing the connecting steel rope into the filling chamber at the other side for fixing by adopting a mechanical arm arranged on an anchor rod trolley;
s7, carrying out cemented filling on the large empty area by adopting high-concentration tailing filling slurry added with a cementing material, wherein the strength of a filling body meets the safe mining requirement of adjacent stoping units and is not less than 1.5 MPa;
s8, filling 1m, solidifying the high-strength geotextile and the dead zone bottom plate into a whole by the solidified filling material to form a permeable sand-separating wall, then normally filling until the filling is finished, wherein the filling height is not higher than 3m for the first time, and filling again after solidification;
and S9, after the goaf subarea filling of the previous stoping unit is finished and the maintenance period is reached, blasting and ore falling of blasting blastholes constructed in the rock drilling chamber of the subsequent stoping unit, and entering the next stoping unit for mining.
2. The zonal controlled filling continuous mining method for isolating pillars in a panel zone of a downhole goaf according to claim 1, wherein in the step S5, after the stoping of the previous stoping unit is finished, the goaf is isolated into two goafs of different sizes of 45m and 5m by using high-strength geotextile.
3. The zonal controlled filling continuous mining method for isolating pillars in a panel zone of a downhole goaf according to claim 1, wherein in the step S7, the large goaf is filled with whole tailings cemented so as to limit the displacement of surrounding rock bodies and fillers and control the ground pressure.
4. The zonal controlled filling continuous mining method for isolated pillars of a panel zone of an underground gob according to claim 1, wherein in the step of S4, when the filling measure roadway and the filling chamber are constructed in the filling body at the previous stage, the bolting with shotcrete is required.
5. The zonal controlled filling continuous mining method for the isolation pillars of the panel zone of the downhole goaf according to any one of claims 1 to 3, wherein in the step S9, blasting blastholes constructed in the rock drilling chamber of the subsequent stoping unit blast and drop ore with a small goaf as a free surface, thereby realizing continuous mining of the isolation pillars of the panel zone.
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| CN202111084887.3A CN113700481B (en) | 2021-09-16 | 2021-09-16 | Zone control filling continuous mining method for underground goaf tray zone isolated ore pillar |
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| CN202111084887.3A CN113700481B (en) | 2021-09-16 | 2021-09-16 | Zone control filling continuous mining method for underground goaf tray zone isolated ore pillar |
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