CN103410513B - Uneasily mining orebody mechanization process for stoping - Google Patents

Abstract

The invention discloses a kind of uneasily mining orebody mechanization process for stoping: first, at the bottom design one rock drilling ore removal chamber of stope, rock drilling ore removal chamber is high is 2.8 ~ 3m, and wide is 3m; Then, upwards cutting a hole diameter at rock drilling ore removal chamber is that the big gun hole of 51mm is to stope border, minimum burden 1.3m, aperture is apart from 0.5 ~ 0.9m, bottom hole pitch 1.4m, after all having been beaten in all big gun holes, at rock drilling ore removal chamber, small charge chassis gradation powder charge is adopted to each row's deep hole, gradation retrusive ore caving.This technique only need tunnel once just can meet whole pillar Stope adopt alignment request, improve and adopt accurate efficiency.After having tunneled drilling drift, adopt new and effective rock drilling equipment to instead of hand drill driving, once having constructed in all big gun holes, improves rock penetration performance; Adopt retrusive lateral caving, adopt remote-controlled scraper and remote control broken chassis associating ore removal, safety and production efficiency have had large increase, and production capacity of mining field can reach more than 150t/d.

Description

Uneasily mining orebody mechanization process for stoping

Technical field

The invention belongs to mining technical field, relate to and a kind ofly choose at top uneasily mining orebody foundation the uneasily mining orebody mechanization process for stoping that suitable stope carries out.

Background technology

Applicant is positioned at northeast, Shaoguan City of Guangdong Province and is about 48km place, is Chinese large-sized lead-zinc production base, class-one national enterprises.At present, mine capacity is from 40 × 10 of the initial stage of operation ⁴t/a, develops into 160 × 10 ⁴more than t/a, mine has daily output lead-zinc ore 5000 ~ 5500 tons, and producing the selecting and purchasing production capacity of plumbous zinc tenor 17 ~ 180,000 t per year, is one of maximum Qian Xin selecting and purchasing enterprise of China's non-ferrous metal industry.

Mineral products, as non-renewable resources, occupy considerable status in socio-economic development.China has miscellaneous mineral resources and rich reserves, and according to the statistics of 45 kinds of main Mineral Resources, the ore reserve total value of China occupies the world the 3rd, accounts for global 14.64%, is only second to the U.S. and the former Soviet Union.Although total amount is enriched, mineral resources occupancy volume only has 58% of world average level per capita, occupies the 53rd, the world.In addition, China's mineral products also also exist difficult ore dressing, lean ore is many, and deposit scale is less than normal, and the rate of recovery is low and waste the problems such as serious.Due to the impact by ore body occurrence patterns, selecting and purchasing method and the factor such as artificial, often adopt in exploitation process richness abandon poor, adopt and easily abandon difficulty, just created a large amount of remnant ore resources like this.Along with the development of social construction, the imbalance between supply and demand of Mineral Resources in China becomes increasingly conspicuous, and some mine, through the exploitation of many decades, also starts to enter the resource exhaustion phase.Therefore in order to extend the length of service in mine, improving mine economic profit, the recovery to remnant ore resource must be strengthened, and how to accomplish that the reclaiming of residual ore resource of safety and efficiently is still a great problem on current mining circle.

All mouth Pb-Zn deposits are positioned at Renhua County, Shaoguan City of Guangdong Province mirror, are under the jurisdiction of middle golden south of the Five Ridges non-ferrous metal limited company.This ore deposit starts to build for 1958, and nineteen sixty-eight puts into serial production.Through the exploitation of more than 40 years, become moderate Resources Crisis Mines In China.By the restriction of early stage surveying conditions and production technique level, leave large quantities of difficulty in each stage casing and adopt (top-bottom pillar) ore body, according to first quarter Mo in 2011 the ore deposit amount report form statistics that all mouth Pb-Zn deposits provide, having 453 foundation ore bodies can back production, possessing ore deposit amount more than 350 ten thousand t, amount of metal Pb be 180,000 t, Zn is 340,000 t.These difficulties are adopted top-bottom pillar ore body and are had of high grade, that total amount is large feature, reclaim these residual ore deposits as much as possible, the resource that supplementary mine is reduced day by day, increase mine economic profit, improve resource utilization, extend the mining time limit and have irreplaceable effect.

Difficulty is adopted top-bottom pillar ore body and is had the advantages that distribution is scattered, small scale, form are changeable.It is as delayed production of resources, complex geologic conditions, and part geological conditions there occurs larger change, and the complexity of periphery engineering also makes back production condition be subject to larger restriction simultaneously, and these all increase the difficulty of top-bottom pillar ore back production.All mouth Pb-Zn deposits adopt traditional strip-type method back production top-bottom pillar ore body at present, and namely first treating to tunnel the tunnel that undercuts in back production top-bottom pillar ore body, the position in the tunnel that undercuts divides two kinds, and one is are drivings in the middle of foundation by foundation limit side driving, two.Undercut and start retrusive after roadway construction and look for limit back production, second layer entity part more than thickness 3.0m will be ensured in first floor exploitation process, top tight filling is started after first floor back production, then the back production second layer is started, the second layer is entered by former route pad slope of caunching, and the gradient is less than 20%, and the second layering adopts the formula back production of itemize driving, namely divide left and right two parts foundation ore body, after the complete Tight filling of Part I back production, carry out the back production of Part II driving formula again.There is more difficulty on all mouth Pb-Zn deposits top and adopts top-bottom pillar ore body stope, and according to conventional method back production, safe difficulty is very large, and work efficiency is very low, and depletion loss is large.

Summary of the invention

Instant invention overcomes shortcoming of the prior art, provide a kind of uneasily mining orebody mechanization process for stoping, achieve uneasily mining orebody metal and maximize and reclaim, and its safety, efficient, to adopt cut journey simple, charge constitution and firing order advanced technology.

Coordinate all mouth Pb-Zn deposits 180,000 t to expand production needs, equilibrium region back production simultaneously, increase stage casing, top back production amount, alleviate stage casing, bottom ore body adherence pressure; There is production efficiency for former stoping method low, labour intensity is large, the shortcomings such as poor stability.This uneasily mining orebody mechanization process for stoping is invented by all mouth Pb-Zn deposits associating Central South University.To fan shaped medium length hole on the BoomerK41X small-sized long and medium hole drilling chassis Drilling that this technique uses AtlasCopco company of Sweden to produce in rock drilling gallery, borehole has once been beaten, adopt the powder charge of small charge chassis, lateral caving, remote-controlled scraper and the broken chassis ore removal of remote control, formwork erection filling immediately after stope mining.This process for stoping is in all mouth Pb-Zn deposits successes of the test at present, and this technique improves mechanization degree greatly, and production efficiency is high, job safety, and operating environment there has also been very large improvement, has given full play to feature safely and efficiently.

By studying the activities of these mining methods further, optimize block structure parameter and impact-cutting wear, the method will be made to have more compliance, and finally apply in all mouth ore deposits, this is of great significance the sustainable back production tool that the difficulty of all mouth ore deposits all mouths Pb-Zn deposits adopts (top-bottom pillar) ore body resource reclaim and all mouth Pb-Zn deposits, promotes the sustainable development in all mouth ore deposits.

In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:

Uneasily mining orebody mechanization process for stoping:

First, at the bottom design one rock drilling ore removal chamber of stope, rock drilling ore removal chamber is high is 2.8 ~ 3m, and wide is 3m;

Then, upwards beating diameter at rock drilling ore removal chamber is that the big gun hole of 51mm is to stope border, minimum burden 1.3m. aperture is apart from 0.5 ~ 0.9m, bottom hole pitch 1.4m, after all big gun holes have all been beaten, at rock drilling ore removal chamber, small charge chassis gradation powder charge is adopted to each row's deep hole, gradation retrusive ore caving.

Further, the explosion of described retrusive ore caving adopts non-electrical blasting network.

Further, mining jumbo is adopted to get big gun hole.

Further, described big gun hole adopts fan shaped medium length hole big gun hole.

Further, described big gun hole array pitch is 1.3m, and bottom hole pitch is 1.4, and aperture distance is 0.9m.

Further, the inclination angle in described big gun hole is 8 ° ~ 88 °, and big gun hole, center is arranged along orebody strike substantially, and each hole packed plane is parallel to each other, and every artillery salvo hole turns forward 85 °.

Further, what described big gun hole adopted is forward coupling charging at the bottom of hole, and intermediate hole first detonates, with section blasting cap initiation; Quick-fried after the big gun of limit, with the quick-fried dead zone of same column intermediate hole institute for the scope of freedom, delayed same column intermediate hole detonates.

Further, first time explosion is to be close to compensation space for the scope of freedom or artificial kerf blasting, and after the onepull all in the past of the later every separate explosion after first time explosion, barnyard is as scope of freedom lateral caving.

Further, remote-controlled scraper and remote control broken chassis associating ore removal is adopted.

Compared with prior art, the invention has the beneficial effects as follows:

Safety is high: tunnel and punching operation process all in the light section rock drilling ore removal chamber operation that supporting is good, ore removal process adopts remote-controlled scraper and remote control broken chassis associating ore removal, and personnel do not enter barnyard after explosion; The more existing technique of safety improves greatly.

Adopt that to cut engineering quantity little: the original difficulty of all mouth Pb-Zn deposits is adopted (top-bottom pillar) ore body stoping method-itemize driving formula process for stoping and need be tunneled three times and just can complete the back production of a foundation ore body, and this process for stoping only need tunnel once, what just can meet whole pillar Stope adopts standard, improves and adopts accurate efficiency.

Production efficiency is high: after having tunneled drilling drift, new and effective rock drilling equipment is adopted to instead of hand drill driving, once construct in all big gun holes, substantially increase rock penetration performance, adopt retrusive lateral caving, remote-controlled scraper ore removal, production efficiency has had large increase, and production capacity of mining field can reach more than 150t/d.

Labour intensity is low: the rock drilling of high-performance jumbo, the powder charge of powder charge chassis, and remote-controlled scraper ore removal, achieves do mechanization operation, greatly reduces the labour intensity of workman.

The present invention have safety high, adopt that to cut engineering quantity little, adopt cutting process simple; Rock penetration performance is high, the advantage that demolition effect is good; Ore removal process completes at rock drilling ore removal chamber, adopts remote-controlled scraper ore removal, adopts remote control broken chassis process bulk, and personnel do not enter barnyard after explosion, and ore removal process safety is efficient.To effectively improve national underground metal mine difficulty and adopt the safety of (top-bottom pillar) ore body back production; By promoting the mining technique level of China's underground metal mine, promote the development of the mining technique of national underground metal mine; The passive situation of the national underground metal mine uneasily mining orebody level of production of effectively taking on a new look low (particularly top-bottom pillar back production); The national underground metal mine difficulty of raising is adopted the rate of recovery of (top-bottom pillar) ore body stope, promote that metals resources maximizes and reclaim; To the Mechanization Level of national underground mining be promoted, and then impel the innovation and progress that improve domestic mining machine.

Accompanying drawing explanation

Accompanying drawing is used to provide a further understanding of the present invention, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention, in the accompanying drawings:

Fig. 1 is foundation work as executed drawing in Shn-280m210#;

Fig. 2 is foundation A-A sectional drawing in Shn-280m210#;

Fig. 3 is foundation B-B sectional drawing in Shn-280m210#;

Fig. 4 is pillar Stope first layer back production schematic diagram in Shn-280m210#;

Fig. 5 is pillar Stope second slicing schematic diagram in Shn-280m210#;

Fig. 6 is pillar Stope the 3rd slicing schematic diagram in Shn-280m210#;

Tu7Shi kerve district steel for shot plane figure;

Tu8Shi kerve district steel for shot B-B section plan;

Tu9Shi kerve district steel for shot A-A section plan;

Figure 10 Shi Cebeng district steel for shot plan view;

Figure 11 Shi Cebeng district steel for shot A-A sectional drawing;

Figure 12 is the 1st artillery salvo hole arrangement diagram;

Figure 13 is BoomerK41X type jumbo Drilling scallop hole schematic diagram;

Figure 14 is kerve district blast hole loading structure schematic diagram;

Figure 15 Shi Cebeng district blast hole loading structure schematic diagram;

Figure 16 Shi Cebeng district blasting cap section schematic diagram;

Figure 17 Shi Cebeng district blasting network schematic diagram.

Detailed description of the invention

Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.

Stope of the present invention is that in Shn-280m210#a, pillar Stope tests stope as uneasily mining orebody mechanization process for stoping, scope of design be Shn-280mWS3# wear and Shn-280mWS4# wear between foundation, X=660 ~ 680, as shown in Figure 1 to Figure 3, in scope of design, ore body is about 4425t.

Geologic information: the ore body in scope of design is mainly the plumbous grade of Shn210a(: 7.65%, zinc grade: 14.41%) ore body, and stope ore body is ribbon, and gentle dip is to tilting, and upper lower burrs angle of internal friction is about 45 °, and orebody thickness is about 6.5m; Tax exists in D2db ledge, and ore body controls by interlayer compressional structure tomography f, and there is NE local to tension fracture in the middle of stope, and ore body gentle dip output, moves towards about NW25 °, and be inclined to NE25 ° ~ 60 ° not etc., steep west, east is delayed.Upper lower burrs country rock (D2tb) is substage Dark grey medium bed limestone folder thin layer white clouds matter siltstone on Devonian system Zhong Tongdonggang ridge, and thin layer powder rock fragility is fragmented into thin-layer tablet block, affects the structural stability of ore deposit rock.Upper lower burrs calx boundary has tomography to pass through, and ore deposit circle and tomography are almost overlapping, tomography joints development, and structure is comparatively broken, and upper dish calx boundary easily produces slide plate face.

Stoping scheme designs: this pillar Stope adopts the back production of uneasily mining orebody mechanization process for stoping, and consider maiden trial, each side condition is all immature, and the back production condition of this stope is poor, therefore for the purpose of safety, plans ore body and is divided into three layers of back production.First floor back production designs fan-shaped Kongzui and deeply controls within 4.5m, after explosion, barnyard Altitude control is within 6.8m, after explosion, top board forms " people " font, is fills up to design height line and carries out looking for Bian Qiecai again, then carry out the back production of next layering after adopting remote-controlled scraper ore removal.Because armor rock on stope has obvious slide plate face, therefore each layering answers formwork erection filling after looking for limit back production, and will ensure that the tunnel after formwork erection can meet the job requirements of BoomerK41X type jumbo, and last layering ore body reserves 3m left and right thickness.Fig. 4, Fig. 5, Fig. 6 are respectively each slicing schematic diagram, and this chapter only introduces the back production situation of this test stope first layer in detail.

Fan shaped medium length hole blast-hole design

Fan shaped medium length hole steel for shot

The feature that scallop hole is arranged be all big gun hole centered by a bit (radiation point) by aperture to direction radial arrangement at the bottom of hole, therefore when arranging fanhole(s), first need the radiation point determining every artillery salvo hole.

1. big gun hole radiation point is determined

Limit according to the place of rock drilling operation, the constraint of the restriction at the slanting angle of ore body and jumbo boring performance, design chassis central axis is moved towards along stope, chassis axis is designed the radiation point in every artillery salvo hole, the liftoff height of radiation point is 1.5m, and the line of this stope each artillery salvo hole radiation point is substantially parallel with the monolateral formwork erection of drilling drift east nation.

2. kerve district steel for shot

Kerve district is arranged in the end of stope, i.e. stope south head, mainly for follow-up explosion provides the scope of freedom and compensation space.The kerve district of uneasily mining orebody mechanization process for stoping is formed by kerve artificial in stope end, namely first forms the scope of freedom in the artificial kerf blasting in encryption big gun hole, end.Because in 210#, top is not tied in the filling at contiguous stope place, head WS4# river, pillar Stope south, filling identity distance is about 1.8m from top board.Therefore, this link of artificial kerve, as the scope of freedom of kerf blasting and compensation space, is saved in the dead zone that can make full use of more than southern head filling face.In the big gun hole of stope south head by jumbo construction 3 row different angle, as shown in Fig. 7, Fig. 8, Fig. 9; Kerve hole is more intensive compared with Beng Bao hole, side, and aperture is apart from about 50cm, and bottom hole pitch is 1.0 ~ 1.2m.

③Ce Beng district steel for shot

According to the scallop hole Hole pattern parameters that previous section optimizes, determine that array pitch is 1.3m, bottom hole pitch is 1.4, and 20 row's fanhole(s)s, apart from being 0.5 ~ 0.9m, are arranged in aperture beyond kerve district within the scope of back production.Adjustment inclination angle, each artillery salvo hole is evenly arranged, and big gun hole is staggeredly arranged between row and row, during to make explosion energy even be discharged in ore body, reduce boulder yield.

The inclination angle in big gun hole is 8 ° ~ 88 °, and big gun hole, center is arranged along orebody strike substantially.Each hole packed plane is parallel to each other, and every artillery salvo hole turns forward 85 °, to increase the scope of freedom, improves demolition effect.The azimuth of each hole packed plane is vertical with radiation point place reference line, and the 1st to drain into the 4th row azimuth be 265 °, and the 5th to drain into the 8th row azimuth be 249 °, and the 9th drains into the 20th, and to arrange azimuth be 237 °.Figure 10, Figure 11 are the big gun hole, Ce Beng district arranged, blast hole depth is 1.0 ~ 4.3m.

Figure 12 is the steel for shot figure of the 1st row, and in figure, 0# big gun hole is the big gun hole of constructing at first, and as the reference point in other big gun holes of Drilling, table 1 is the parameter list in the 1st row's design big gun hole.

Table 1 the 1st artillery salvo hole parameter list

4. big gun hole engineering quantity statistics is designed

Big gun hole, 20, kerve district, big gun hole, 121, Ce Beng district, big gun hole total length is 434m, and rock yield is about 2000t, and every meter of rock yield is 5t.

Construct in big gun hole

(1) localization characteristics of jumbo Drilling scallop hole

BoomerK41X type jumbo is comparatively large due to size, therefore when Drilling scallop hole, can not disperse direction, big gun hole, and should design direction, big gun hole according to equipment characteristic as YG-90 type hammer drill around a fulcrum.Because hammer drill about has 0.8m to cantilever centre distance, during hinged cantilever, always anterior center of rotation keeps regular length and fixed angle to drilling rod transmit direction with cantilever, for convenience of the reading of electronics angle instruction platform, the adjustment forward beam angle of pitch is 0 °, make drilling rod and cantilever-rotating device keep 90 ° of angles, drilling rod in the tangential direction of rotational circle, as shown in figure 13.

(2) determine position, hole, big gun hole and hole to

Survey crew, according to the jumbo central axis bracing wire of design, marks the row number of each row's scallop hole at formwork erection place of stope western nation, in the position, hole of top board mark 0# datum hole.Chassis operating personnel adjust drill boom, make it parallel with reference line, the end points of drill boom overlaps with big gun hole reference point, control errors is within 200mm, fix forward beam tip length, the adjustment forward beam angle of pitch makes it perpendicular to forward beam axis of rotation, then according to the inclination angle in big gun hole, tendency adjustment cantilever (adjustment inclination angle), forward beam (adjustment anteversion and retroversion to), then carries out perforate construction.

Explosion designs

(1) explosion planning

Consider the compensation space that drilling drift can be explosion and provides enough, whole stope is divided into two separate explosions: first time is the explosion of kerve district, and explosion scope drains into the 6th artillery salvo hole for drawing 1; Second time explosion scope is remaining all big gun holes, namely the 7th drains into the 20th row.

(2) charging means and structure

1. powder charge adopts NT30/9EN type powder charge chassis, due to employing is hole-bottom blast, therefore during powder charge, detonating fuse and igniting primer are delivered at the bottom of hole with powder charge pipe, detonating fuse is from laying to aperture at the bottom of hole, connect with the adjacent same section of the row big gun hole detonating fuse that detonates, lap length is greater than 15cm, coefficient of charge is 0.8 ~ 0.95, aperture stemming blocks, stemming length is about 0.5 ~ 1.2m, for avoiding bore portions powder charge overstocked, the loaded length of adjacent shot hole is staggered different, and Figure 14 ~ Figure 15 is respectively the explosion of kerve district, Ce Beng district blasting hole charge constitution schematic diagram;

2. first time reduces powder charge with second time explosion scope boundary, and adopt big gun hole midfeather 0.5m thick bamboo tube, the charge constitution being similar to smooth blasting of 1.2m not powder charge is stayed in aperture, to reduce explosion backlash effect, makes blasting cut smooth;

3. be arranged in the big gun hole squeezing into barren rock of dish, one, interval at the bottom of the hole little thick bamboo tube of 30cm, to protect upper armor rock and top board.

(3) detonation mode

Compound detonating fuse-detonator elementary errors non-electric initiation system is adopted to detonate.Because scallop hole orifice distance is closer, for when avoiding explosion, adjacent shot hole can influence each other, therefore detonating fuse is adopted to be together in series with row with the adjacent shot hole that section is detonated.

(4) firing order and initiation net

First to detonate kerve district, after to detonate Ce Beng district, detonating of kerve district is worn as the scope of freedom and compensation space to detonate top board big gun hole by row to pressing down ore deposit with WS4#, detonating with kerve district for the scope of freedom and compensation space of Ce Beng district, middle 4 holes and upper dish 1 ~ 2 hole first quick-fried, lower wall 1 ~ 2 is lateral opening rear quick-fried, detonates by row from south orientation north.Figure 16 is second time Ce Beng district blasting hole blasting cap initiation section schematic diagram.

Figure 17 is NONEL firing network schematic diagram, is to ensure the reliability of initiation net, notes what time below: 1. must not have fast knot in Nonel tube network, the detonator be contained in hole must not have joint in line process; 2. for the detonator of same hole packed plane must be same factory with lot number product, enough spacing should be left between detonating primer outside hole; 3. when Nonel tube network adopts blasting cap initiation, should take measures, prevent the concentrated cave of detonator from cutting off detonator and cause and miss-fire; 4., around detonator should be laid in detonator equably, prevent the pore of millisecond delay cap from burning out detonator.

(5) blasted material consumption and technical indicator

First time explosion 35 loaded holes altogether, second time explosion 106 loaded holes altogether, table 2, table 3 are respectively the technical indicator of two separate explosions.

Table 2 first time blasting parameter and index

Table 3 second time blasting parameter and index

Blast working

(1) preparation

1. the destruction that drilling construction is certain to Stope roof, Bian Bangyou, particularly ore deposit rock interface, the vibratory impulse effect repeatedly that is subject to produces or extends crack, rock is caused to loosen, therefore before entering stope and checking and accepting big gun hole, the comprehensive careful roof cleaning of application service chassis, limit side turquoise, ensure the safety of subsequent job;

2. before explosion, verified in burst region big gun hole and check, and big gun hole is clean with pressure wind, avoid the situation occurring plug-hole during powder charge or block powder charge pipe;

3. check walking, the powder charge performance of powder charge chassis, and check passing road, guarantee that chargeholder vehicle passage is unimpeded;

4. check have the equipment, pipeline, facility etc. that need not protect near burst region, and ventilation equipment (air door, brattice, portable blower etc.), determine blasting fume trend.

(2) charging

What this test adopted is NT30/9EN type powder charge chassis, should carry out at powder charge process in strict accordance with the safety regulation for operations of this powder charge chassis.

1. drawn safety warning tape in bursting work region, forbidden kindling material and inflammable articles to bring bursting work place into, forbid in operation field smoking;

2. fully check powder charge chassis before powder charge, as occurred, any alarm condition answers hard stop, waits to ascertain the reason, and can start shooting after treated confirmation is normal:

The line etc. of the detonator section in 3. powder charge, primer [cartridge], stemming length, detonating fuse and initiation net all should carry out according to design;

4. second time explosion powder charge process in time, forbid anyone to enter explosion barnyard;

5. must conscientiously check the line checked and often organize explosion before detonating, multiple-row blasting situation etc., can detonate after errorless.

(3) ventilation and ore removal

1. ventilate: install portable blower at stope route mouth, after fresh distinguished and admirable cleaning blasting face, dirty wind is discharged to return airway through return air connecting taxiway;

2. ore removal: adopt remote-controlled scraper ore removal, unload ore deposit in WS1# drop shaft.

Demolition effect is evaluated

In Shn-280m210#, stope tested by foundation (WS3# ~ WS4# section of wearing), and due to the unsafe factor such as surrounding rock separation layer, inbreak is coiled in gently inclined orebody existence, orebody trend is irregular again, and tunnel is narrow and small, belongs to difficulty and adopts stope.By adopting uneasily mining orebody mechanization process for stoping to carry out back production to this test stope, explosion at twice, total charge 1077kg, rock yield is about 2100t.After two separate explosions, all mouth Pb-Zn deposits have organized related personnel to carry out demolition effect to this stope, reach the demolition effect of expection on inspection, namely achieve top board and become " people " word arc, top board is smooth, float stone, turquoise are less, and explosion barnyard is up to about 7.0m, and upper armor rock is not destroyed, ore deposit rock interface is totally smooth, without viscous ore body, blasting cut smooth effect is good, and lower wall ore deposit rock interface is separated, sliding surface is formed according to designing ore deposit angle, blast fragmentation size is reasonable, without obvious bulk, all can meet shovel ore deposit requirement.

Positive effect of the present invention is: the existing mining mining conditions of applicant just progressively worsens, the difficulty stope that difficulty is large, ore body is little gets more and more, in Shn-280m210#, the success of stope tested by foundation (WS3# ~ WS4# section of wearing), adopts wideling popularize large, that ore body the is little difficulty of the safe difficulty in all mouth ore deposits in (top-bottom pillar) ore body stope.The safety in production of all mouth Pb-Zn deposits is had great importance: one is improve the safety that difficulty adopts (top-bottom pillar) ore body stope, and the difficulty reducing all mouth Pb-Zn deposits adopts the safety management pressure of (top-bottom pillar) ore body stope.Two is the production capacity that improve stage casing, all Kou Kuang top uneasily mining orebody, alleviates stage casing, bottom adherence pressure, balances regional production and coordinates, thus create conditions to all mouth Pb-Zn deposits sustainable high-yield.Three is the mining technology capacities of scientific research that improve all mouth Pb-Zn deposits, improves the level professional technology of all mouth ore deposit mining technicianses.Four is improve the rate of recovery that (top-bottom pillar) ore body stope is adopted in all mouth mine disasters, and metals resources maximizes and reclaims.

This method is generalized in the underground metal mine in the whole nation and goes, also have meaning out of the ordinary: one is will effectively improve national underground metal mine difficulty and adopt the safety of (top-bottom pillar) ore body stope.Two is the mining technique levels by promoting China's underground metal mine, promotes the development of the mining technique of national underground metal mine.Three is by the passive situation of the national underground metal mine uneasily mining orebody level of production low (particularly top-bottom pillar back production) of effectively taking on a new look.Four is the rate of recovery of the national underground metal mine difficulty of raising being adopted (top-bottom pillar) ore body stope, promotes that metals resources maximizes and reclaims.Five is the Mechanization Levels by promoting national underground mining, and then impels the innovation and progress that improve domestic mining machine.

The top board of rock drilling ore removal chamber of the present invention and limit side all adopt anchor pole and wire gauze combined supporting, guarantee the safety of personnel when rock drilling ore removal chamber cutter big gun hole and powder charge; Shovel ore deposit safety: shovel ore deposit personnel do not enter explosion barnyard, the operating and remote controlling scraper mechanical shovel ore deposit, rock drilling ore removal chamber place that shovel ore deposit personnel are handling well, ensure that the safety of shovel ore deposit process.

Last it is noted that these are only the preferred embodiments of the present invention; be not limited to the present invention; although with reference to embodiment to invention has been detailed description; for a person skilled in the art; it still can be modified to the technical scheme described in foregoing embodiments; or equivalent replacement is carried out to wherein portion of techniques feature; but it is within the spirit and principles in the present invention all; any amendment of doing, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (5)

1. uneasily mining orebody mechanization process for stoping, is characterized in that:

First, at the bottom design one rock drilling ore removal chamber of stope, rock drilling ore removal chamber is high is 2.8 ~ 3m, and wide is 3m;

Then, it is that the big gun hole of 51mm is to stope border that rock drilling ore removal chamber upwards cuts a hole diameter, minimum burden 1.3m. aperture is apart from 0.5 ~ 0.9m, bottom hole pitch 1.4m, after all big gun holes have all been cut a hole, at rock drilling ore removal chamber, small charge chassis gradation powder charge is adopted to each row's deep hole, gradation retrusive ore caving; Adopt remote-controlled scraper and remote control broken chassis associating ore removal; Mining jumbo is adopted to set off firecrackers hole; Described big gun hole adopts fan shaped medium length hole big gun hole.

2. uneasily mining orebody mechanization process for stoping according to claim 1, is characterized in that: the explosion of described retrusive ore caving adopts non-electrical blasting network.

3. uneasily mining orebody mechanization process for stoping according to claim 2, is characterized in that: the inclination angle in described big gun hole is 8 ° ~ 88 °, and big gun hole, center is arranged along orebody strike substantially, and each hole packed plane is parallel to each other, and every artillery salvo hole turns forward 85 °.

4. uneasily mining orebody mechanization process for stoping according to claim 1, is characterized in that: what described big gun hole adopted is forward coupling charging at the bottom of hole, and intermediate hole first detonates, with section blasting cap initiation; Quick-fried after the big gun of limit, with the quick-fried dead zone of same column intermediate hole institute for the scope of freedom, delayed same column intermediate hole detonates.

5. uneasily mining orebody mechanization process for stoping according to claim 1, it is characterized in that: first time explosion is to be close to compensation space for the scope of freedom or artificial kerf blasting, and after the onepull all in the past of the later every separate explosion after first time explosion, barnyard is as scope of freedom lateral caving.