Summary of the invention
Technical problem to be solved by this invention be propose a kind of constructing artificial roof, the upper lower burrs country rock is reinforced in advance with the combination of supporting, reproduces under structure, realizes that ore body safety, the combination that efficient, effective combination is exploited in scale reproduce the structure medium-length hole collaborative cable bolting afterwards filling mining method in ore deposit that falls.
In order to solve the problems of the technologies described above, the structure medium-length hole collaborative cable bolting afterwards filling mining method in ore deposit that falls is reproduced in combination provided by the invention, adopt the downdraft mode substoping, at first in upper armor rock, one of driving is cut the jacking road, adopt smooth blasting, construct artificial roof along orebody trend after cutting top; Integrate the multifunctional tunnel of rock drilling, supporting, ore removal along the orebody trend driving in upper armor rock, adopt medium-length hole to arrange fanhole(s), utilize simultaneously medium-length hole arrange wall rock grouting reinforce with cable bolting on coil engineering, make that wall rock grouting is reinforced, explosion falls, and the miner does and cable bolting work " closing three is one "; Adopt drawing back, scraper ore removal, realize ore body safety, efficient, scale back production.
Concrete steps are as follows:
(1) by ore body division, be stage casing, each stage casing is divided into two segmentations and carries out the downdraft mode back production;
(2) arrange upward incise along orebody strike in the armor rock on ore body, one of upper sublevel mining room top driving is cut the jacking road, after completing and cutting top work, adopts the slip casting of portable filling pumping system, and the barren rock consolidated fill forms artificial roof; Construct in process at artificial roof, arrange in advance the filling well;
(3), at the boundary of country rock lower wall and ore body, along orebody strike driving slot raise, as the fall compensation space in ore deposit of medium-length hole blasting first, along orebody trend, adopt retrusive back production step by step;
(4) each sublevel drive connecting taxiway is linked up upward incise and ore body, and cuts the multifunctional tunnel that integrates rock drilling, supporting, ore removal in jacking road and connecting taxiway along the orebody trend driving on top; In each multifunctional tunnel, arrange fan shaped medium length hole, utilize the medium-length hole grouting and reinforcing and arrange armor rock on cable bolting, and adopting the high efficiency medium-length hole ore deposit that falls in a large number, adopt the scraper ore removal.
Adopt the combination of technique scheme to reproduce the structure medium-length hole collaborative cable bolting afterwards filling mining method in ore deposit that falls, take full advantage of medium-length hole, collaborative slip casting, long anchor cable are installed, explosion falls, and the miner does, take full advantage of the multifunctional tunnel that integrates rock drilling, supporting, ore removal function, realize the orderly combination of rock drilling, punching, supporting, ore removal workplace.Be two segmentations by the stage casing ore body division, after top is cut at the mineral building top, adopt the barren rock consolidated fill to construct one deck Man-made False, realize mining environment reconstructing.Rationally determine the height of artificial roof according to stope exposure area, guarantee the stability of stope top board.By multifunctional tunnel Drilling medium-length hole, upper armor rock is carried out to fracture grouting, thereby reinforce breaking surrounding rock.With the medium-length hole blasting ore deposit that paragraphs, press the cable bolting design, long anchor cable is installed, carry out anchor rope grouting, armor rock in supporting, guarantee next segmentation safe working.At the boundary slot raise of country rock lower wall and ore body, take slot raise as scope of freedom explosion formation cutting groove, as the scope of freedom of extensive back production.In sublevel drilling, supporting, discharging tunnel, the Drilling medium-length hole also adopts lateral caving mode broken ore, drawing back; Utilize scraper and flat polycrystalline substance to carry out ore removal, carry out immediately the operation of filling stope after ore removal; By analyzing Drilling medium-length hole core, determine the boundary line of ore body and upper armor rock, reasonable Arrangement medium-length hole parameter and charge constitution, reduce loss and the dilution of ore.After ore removal, according to upper dish surrounding rock supporting situation and roof and floor steadiness, determine the total side of Mixture ratio of backfilling materials, packed height and casting resin amount, adopt the more low intensive casting resins such as barren rock as far as possible, reduce filling cost.
The invention has the beneficial effects as follows, solved all technical barriers of the safe and efficient back production of ore body under condition built on the sand of country rock and ore body, adopt multiple support pattern, realize that combination reproduces structure, guarantee the safety of stope.Take full advantage of the multifunctional tunnel in the armor rock, realize that rock drilling, supporting, ore removal function are integrated, reduced in a large number and adopted accurate engineering quantity; Take full advantage of the ore deposit operation that falls of the collaborative surrounding rock supporting of medium-length hole, explosion; Adopt the barren rock afterwards filling, reduced mining cost, embodied the theory of green mining.These mining methods can realize ore body safety, efficient, green, scale back production.
In sum; the present invention be a kind of constructing artificial roof, the upper lower burrs country rock is reinforced in advance with the combination of supporting, reproduces under structure, realizes that ore body safety, the combination that efficient, effective combination is exploited in scale reproduce the structure medium-length hole collaborative cable bolting afterwards filling mining method in ore deposit that falls.
The accompanying drawing explanation
Fig. 1 is that the Mining method design front view is along C-C line cut-away view in Fig. 2.
Fig. 2 is along A-A line sectional drawing in Fig. 1.
Fig. 3 is along B-B line sectional drawing in Fig. 1.
Fig. 4 is the fan shaped medium length hole partial enlarged drawing.
In figure: 1. horizontal transport tunnel, 2. Man-made False, 3. fill pass, 4. anchor cable and medium-length hole, 5. broken ore, 6. slot raise, 7. level haulage tunnel, 8. the ore removal route, 9. go up the armor rock, 10. multifunctional tunnel, 11. segmentation connecting taxiways, 12. routes of going up a hill, 13. cut the jacking road, 14. fan shaped medium length hole, the 15. medium-length hole blastings ore deposit section that falls, 16. medium-length hole slip casting (anchor cable) supporting sections.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, be stage casing by ore body division, when stope is divided in stage casing, by upper and lower stage casing stope interlaced arrangement, carries out the downdraft mode back production.At ore body lower wall Drilling slot raise 6, and take slot raise 6 as explosion scope of freedom formation cutting groove, as the explosion scope of freedom of follow-up extensive actual mining.Tunnel the route 12 of going up a hill in the armor rock on ore body, be connected with horizontal transport tunnel 1, form exploiting field transportation system.Cut jacking road 13 at stage casing top board driving and arrive ore body, cut top and construct after hours Man-made False 2, and reserve fill pass 3 in top board.Driving segmentation connecting taxiway 11 in upper armor rock, be communicated with the route of going up a hill and arrive ore body.Integrate the multifunctional tunnel 10 of rock drilling, supporting, ore removal along the orebody trend driving at upper armor rock by segmentation connecting taxiway 11; Rock drilling equipment is at the interior Drilling fan shaped medium length hole 14 of multifunctional tunnel 10, forms medium-length hole blasting fall ore deposit section 15 and medium-length hole slip casting (anchor cable) supporting section 16.Carry out successively the operations such as powder charge, on line, explosion, slip casting (cable bolting) by fan shaped medium length hole 14, broken ore 5 adopts flat-bottom structure by the scraper concentrating mining.The ore of each segmentation is transported to level haulage tunnel 7, then transports earth's surface by mine haulage system through ore removal route 8, segmentation connecting taxiway 11, the route 12 of going up a hill according to this.Bashing immediately after stope mining, packing job adopts the movable type pumping filling system to be filled with goaf through 7 casting resins of horizontal drift; According to the actual conditions of goaf form and country rock steadiness, determine packed height and fill volume, goaf is incomplete top tight filling; Before stope carries out filling, build in advance filling counterfort by laying bricks or stones, and pre-buried PVC gutter, ponding is drained into to each stage casing sump.
In exploitation process, according to the geological conditions of ore body and upper lower burrs country rock, adopt suitable support pattern (the common supporting of grouting support or grouting cable anchor), and strengthen the monitoring to strength of filling mass.