CN113700481B - Zone control filling continuous mining method for underground goaf tray zone isolated ore pillar - Google Patents
Zone control filling continuous mining method for underground goaf tray zone isolated ore pillar Download PDFInfo
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- CN113700481B CN113700481B CN202111084887.3A CN202111084887A CN113700481B CN 113700481 B CN113700481 B CN 113700481B CN 202111084887 A CN202111084887 A CN 202111084887A CN 113700481 B CN113700481 B CN 113700481B
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- 238000005065 mining Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000000605 extraction Methods 0.000 claims abstract description 27
- 238000005192 partition Methods 0.000 claims abstract description 16
- 238000005422 blasting Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000011435 rock Substances 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 238000005553 drilling Methods 0.000 claims description 11
- 239000004746 geotextile Substances 0.000 claims description 10
- 238000002955 isolation Methods 0.000 claims description 8
- 239000004744 fabric Substances 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- 239000002002 slurry Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims 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
- 239000002184 metal Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- 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 control filling continuous mining method for underground goaf tray-zone isolated ore pillars, which is a safe and efficient continuous mining method for forming unfilled free surfaces for a later mining unit by carrying out zonal filling on the goaf of the same tray-zone isolated ore pillar. The invention uses modern mechanical equipment and material technology to control the filling of the goaf in the short axis direction in an isolated partition way, and the unfilled goaf is used as the blasting free surface of the subsequent disk area ore pillar extraction unit to form continuous and efficient disk area ore pillar extraction. The method has the advantages of simplified cutting arrangement, less engineering quantity and simplified blasting procedure, and simultaneously has high exploitation rate of mineral resources.
Description
Technical Field
The invention relates to the field of mining of metal mine underground goaf partition filling and partition isolation ore pillars, and discloses a method for continuously and efficiently mining partition filling of partition isolation ore pillars reserved in metal ore deposit partition.
Background
Mining methods adopted by mining equipment and mining body occurrence conditions of large-scale super-large deep-buried metal ore deposits with different dip angles are different, and partition area mining is popularized and applied due to the advantages of high efficiency, good safety and the like. In order to prevent the recovery units from being interfered with each other, a coil area ore pillar is inevitably reserved between the coils, and the general recovery rate of the ore pillar as a residual ore resource is lower than 60%.
The size of the ore pillar is determined by engineering requirements and rock mechanical properties, and the size of the ore pillar accounts for 18-20% of the total resource. In order to fully utilize resources, control ground pressure and reduce or avoid secondary geological disasters, goafs of a stope in a panel are filled, and conditions are provided for mining of mining pillars of the panel. The two sides of the coiled mining pillar are replaced by the filling bodies with much lower strength to replace the primary rock mass, the engineering geological conditions of the mining pillar are affected by the vibration, stress concentration and the like of the earlier mining blasting, the mining conditions are much worse than those of the earlier normal mining stope, and therefore the mining method of the coiled mining pillar resources is limited.
The mining method adopted by the mining of the coiled mining pillar generally comprises an upward layered filling method and a routing method, and the mining safety of the method is good, but the efficiency is low; if the mining is carried out by adopting a medium-hole or deep-hole ore dropping open stope subsequent filling method which is basically the same as a normal stope, after ore extraction and filling of one ore pillar stope are finished, the subsequent stope needs to be re-grooved, the stoping efficiency is low, and the productivity is difficult to meet the mine production requirement.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a safe and efficient continuous stoping method for forming unfilled free surfaces for a later stoping unit by carrying out regional filling on a goaf of an isolated pillar of the same disk area.
The technical scheme adopted by the invention is as follows: the zonal control filling continuous mining method for the underground goaf tray isolated ore pillars is characterized by comprising the following steps of: s1, dividing a tray area isolation ore pillar into a plurality of extraction units with the length not exceeding 50m, wherein the width of each extraction unit is the thickness of the ore pillar, and the extraction units are back-extracted from one side to the other side; s2, reserving ore walls with the length of 12m and the thickness of not less than 2m between adjacent stoping units as permanent losses; s3, deep hole ore dropping is adopted by the extraction unit, the aperture is 120-165mm, the depth of the hole is 50-60m higher than the extraction section, the trench is subjected to ore, and the trackless scraper is used for ore removal; s4, when the mining of the stoping unit is finished and a large amount of ore is discharged, constructing a rock drilling chamber of the subsequent stoping unit, a filling measure roadway and a filling chamber of the stoping unit; s5, after stoping of the stoping unit is finished, isolating the goaf into two goafs with different sizes by adopting high-strength geotechnical cloth; s6, a fixed anchor rod is beaten in the filling chamber at one side, a connecting steel rope is fixed on the fixed anchor rod, the complete geotechnical cloth is fixed on the connecting steel rope, and a mechanical arm arranged on an anchor rod trolley is adopted to draw the connecting steel rope into the filling chamber at the other side for fixation; s7, performing cemented filling on the large empty area by adopting high-concentration tailing filling slurry added with cementing materials, wherein the strength of the filling body meets the safety exploitation requirement of an adjacent stoping unit and is not less than 1.5MPa; s8, filling 1m, after filling materials are solidified, solidifying high-strength geotextile and a hollow area bottom plate into a whole, forming a permeable sand partition wall, performing normal filling, wherein the height of one filling is not higher than 3m, and filling until the filling is finished; s9, after the regional filling of the goaf of the stoping unit reaches the curing period, blasting blastholes in the subsequent stoping unit rock drilling chamber construction are blasted to break down ores, and the next stoping unit is started to mine.
As a further improvement of the invention, in the step S5, after the stoping of the 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 tailing cemented filling is adopted for the large empty area so as to limit the displacement of the surrounding rock mass and the filling body and control the ground pressure.
As a further improvement of the invention, in the step S4, when the filling measure tunnel and the filling chamber are constructed in the earlier-stage filling body, the anchor net concrete spraying support is needed.
As a further improvement of the invention, in the step S9, the blasting blastholes in the subsequent stoping unit rock drilling chamber construction are blasted and ore-dropped by taking the small empty areas as free surfaces, so that the continuous mining of the disc-area isolated ore pillars is realized.
The invention has the beneficial effects that: the invention uses modern mechanical equipment and material technology to control the filling of the goaf in the short axis direction in an isolated partition way, and the unfilled goaf is used as the blasting free surface of the subsequent disk area ore pillar extraction unit to form continuous and efficient disk area ore pillar extraction. The method has the advantages of simplified cutting arrangement, less engineering quantity and simplified blasting procedure, and simultaneously has high exploitation rate of mineral resources.
Drawings
FIG. 1 is a plan view of a tray deck of the present invention;
FIG. 2 is a cross-sectional view of the pillar of FIG. 1 taken along the panel (section II-II of FIG. 1);
FIG. 3 is a cross-sectional view of the vertical extent isolated pillar of FIG. 1 (section III-III of FIG. 1);
fig. 4 is a schematic diagram of a continuous recovery unit.
The figure shows: 1. the method comprises the steps of firstly mining and stoping units, 2 geotextiles, 3 reserved non-filled goaf, 4 permanent mine walls, 5 filled chambers, 6 fixed anchors, 7 filled measure roadways, 8 subsequent stoping units, 9 rock drilling chambers, 10 first goaf filling bodies in a disc area, 11 second goaf filling bodies in the disc area, 12 post mining filling bodies, 13 trenches and 14 blasting blastholes.
Detailed Description
The invention is further described with reference to fig. 1 to 4.
The zonal control filling continuous mining method for the underground goaf tray isolated ore pillars comprises the following steps:
s1, dividing a coil isolation ore pillar into a plurality of stoping units along the long axis direction of the coil ore pillar, determining the mining sequence of the stoping units by the existing engineering, and carrying out retreating mining from one side to the other side;
s2, firstly, the stoping unit 1 is mined, and a permanent mine wall 4 with a certain width is reserved at the intersection of the stoping unit and the subsequent stoping unit; the stoping unit is used for protecting the mine wall with the length of not less than 12m and the thickness of 2m so as to ensure the safety of the operation of the operator equipment in the filling chamber.
S3, firstly, deep hole ore dropping is adopted in the extraction unit 1, the trenches 13 are subjected to ore, and the trackless scraper is used for ore discharging;
s4, when the mining unit firstly extracts ores, simultaneously constructing projects such as a rock drilling chamber 9, a filling measure roadway 7, a filling chamber 5 and the like of a subsequent mining unit 8;
s5, after the extraction of the extraction unit is finished, the goaf is filled in an isolated partition;
s6, constructing a filling fixed anchor rod 6 in the filling chamber 4, fixing a traction steel rope on the one-side chamber fixed anchor rod 6, uniformly fixing high-strength geotechnical cloth 2 on the steel rope, and adopting a manipulator additionally arranged on a trolley of the anchor rod to drag one end of the steel rope to the other-side filling chamber to be fixed on the anchor rod, wherein the high-strength geotechnical cloth 2 is uniformly distributed on the vertical surface of a goaf and is not more than 5m away from a subsequent stoping unit, and the goaf is divided into a large goaf and a small goaf;
s7, filling the large goaf by adopting high-concentration full-tailing cemented filling slurry;
s8, filling about 1m thick, solidifying the geotextile 2 with the goaf bottom plate, and forming a permeable sand prevention isolation layer by using the high-strength geotextile;
s9, normally cemented filling the large goaf until curing is expired to form a cemented filling body meeting the requirement of post strength, and the small goaf is used for mining a blasting free surface for a subsequent tray area ore pillar extraction unit, and the adjacent ore pillar extraction unit and the stoping filling form the next operation cycle.
For further understanding, the preferred embodiments are further explained.
The method comprises the following steps of 1, partitioning control filling continuous mining of underground goaf tray-area isolated ore pillars, wherein S1, mining units with the length not exceeding 50m are partitioned along the trend of the tray-area isolated ore pillars, the width is the thickness of the ore pillars, and different mining units are mined in a backward way from one side to the other side; s2, reserving a mine wall with the length of 12m and the thickness of 2m at the adjacent position of the first extraction unit and the subsequent extraction unit as permanent loss; s3, deep hole ore dropping is adopted by the extraction unit, the aperture is 120-165mm, the depth of the hole is 50-60m higher than the extraction section, the trench 13 receives ore, and the trackless scraper discharges ore; s4, after the mining of the stoping unit is finished, constructing a rock drilling chamber of the subsequent stoping unit, a filling measure roadway of the stoping unit which is just coming out, and a filling chamber when a large amount of ores are discharged; s5, after stoping of the stoping unit is finished, a high-strength geotextile 2 is adopted to isolate the goaf into two goafs with different sizes of 45m and 5m, and the geotextile is used for water penetration and sand prevention; s6, a fixed anchor rod is beaten in the filling chamber at one side, a connecting steel wire rope is fixed, the complete geotechnical cloth is fixed on the connecting steel wire rope, and a mechanical arm arranged on an anchor rod trolley is adopted to draw the connecting steel wire rope to the filling chamber at the other side for fixation; s7, performing cemented filling on the large empty area by adopting high-concentration tailing filling slurry added with cementing materials so as to limit the displacement of surrounding rock mass and filling bodies, controlling the ground pressure, wherein the strength of the filling bodies meets the safety exploitation requirement of adjacent stoping units and is not less than 1.5MPa; s8, filling 1m, after filling materials are solidified, solidifying high-strength geotextile and a hollow area bottom plate into a whole, forming a permeable sand partition wall, performing normal filling, wherein the height of one filling is not higher than 3m, and filling until the filling is finished; s9, after the regional filling of the goaf of the previous stoping unit reaches the maintenance period, blasting blastholes 14 constructed in the rock drilling chamber 9 of the subsequent stoping unit are blasted with the small regional goaf 3 as a free surface to fall ores, and the next stoping unit is started to mine. Wherein the coiled section pillar extraction rock drilling blasting utilizes filling drill holes for ventilation; the construction tunnel engineering in the cemented filling body adopts anchor net concrete spraying or mould concrete spraying support. The invention carries out partition filling on the goaf of the pillar in the same tray area, wherein the small goaf is an unfilled free surface formed by the pillar extraction unit of the secondary tray area, thereby realizing the purpose of continuous extraction.
It should be understood by those skilled in the art that the protection scheme of the present invention is not limited to the above embodiments, and various arrangements and modifications can be made on the basis of the above embodiments, and various modifications of the present invention fall within the protection scope of the present invention without departing from the spirit of the present invention.
Claims (5)
1. The zonal control filling continuous mining method for the underground goaf tray isolated ore pillars is characterized by comprising the following steps of:
s1, dividing a tray area isolation ore pillar into a plurality of extraction units with the length not exceeding 50m, wherein the width of each extraction unit is the thickness of the ore pillar, and the extraction units are back-extracted from one side to the other side;
s2, reserving ore walls with the length of 12m and the thickness of not less than 2m between adjacent stoping units;
s3, deep hole ore dropping is adopted by the extraction unit, the aperture is 120-165mm, the depth of the hole is 50-60m higher than the extraction section, the trench is subjected to ore, and the trackless scraper is used for ore removal;
s4, when the mining of the stoping unit is finished and a large amount of ore is discharged, constructing a rock drilling chamber of the subsequent stoping unit, a filling measure roadway and a filling chamber of the stoping unit;
s5, after stoping of the stoping unit is finished, isolating the goaf into two goafs with different sizes by adopting high-strength geotechnical cloth;
s6, a fixed anchor rod is beaten in the filling chamber at one side, a connecting steel rope is fixed on the fixed anchor rod, the complete geotechnical cloth is fixed on the connecting steel rope, and a mechanical arm arranged on an anchor rod trolley is adopted to draw the connecting steel rope into the filling chamber at the other side for fixation;
s7, performing cemented filling on the large empty area by adopting high-concentration tailing filling slurry added with cementing materials, wherein the strength of the filling body meets the safety exploitation requirement of an adjacent stoping unit and is not less than 1.5MPa;
s8, filling for 1m, solidifying the filling material to form a permeable sand partition after solidifying the high-strength geotextile and the empty area bottom plate into a whole, then filling normally, wherein the filling height is not higher than 3m for one time, and filling again until the filling is finished;
s9, after the regional filling of the goaf of the previous stoping unit reaches the curing period, blasting blastholes in the subsequent stoping unit rock drilling chamber construction are blasted to break down ores, and the next stoping unit is started to mine.
2. The method for continuously mining the partition-controlled filling of the underground goaf tray-area isolation ore pillar 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 with different sizes and growing 45m and 5m by adopting high-strength geotextile.
3. The method for continuously mining the partition-controlled filling of the underground goaf tray-area isolation ore pillar according to claim 1, wherein in the step S7, full-tailing cemented filling is adopted for the large goaf to limit the displacement of surrounding rock mass and filling body and control the ground pressure.
4. The method for continuously mining the partition-controlled filling of the underground goaf tray-area isolated ore pillars according to claim 1, wherein in the step S4, the anchor net concrete spraying support is needed when the filling measure roadway and the filling chamber are constructed in the earlier-stage filling body.
5. A method for continuously mining a disc-zone isolated pillar in a downhole goaf by zone control filling according to any one of claims 1 to 3, wherein in step S9, blasting blastholes in subsequent stoping unit rock drilling chamber construction are blasted with small empty zones as free surfaces to mine, thereby realizing continuous mining of the disc-zone isolated 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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| 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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| CN113700481B true CN113700481B (en) | 2024-01-05 |
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