CN102493839B - Method for filling gob - Google Patents
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- CN102493839B CN102493839B CN 201110413329 CN201110413329A CN102493839B CN 102493839 B CN102493839 B CN 102493839B CN 201110413329 CN201110413329 CN 201110413329 CN 201110413329 A CN201110413329 A CN 201110413329A CN 102493839 B CN102493839 B CN 102493839B
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Abstract
The invention provides a method for filling a gob. In the filling process, when filling paste arrives at the position of an elastic baffle, a pushing device which is arranged on a tail beam of a hydraulic support pushes and pulls the elastic baffle back and forth to ensure that the filling paste refills the gob after being pushed to the gob which is not filled fully behind the hydraulic support; the pushing device is hinged with a pushing jack at the left end of the tail beam of the hydraulic support; the right end of the pushing jack is connected with the elastic baffle; and the filling paste is formed by uniformly mixing coal gangue, coal ash, a cementing material and water in the mass percent ratio of 45:20:15:20. According to the method, the pushing device which is arranged on the tail beam of the hydraulic support has a simple structure and is convenient to operate; and according to particle sizes and different ratios of components, the materials of the filling paste are convenient to transport and control, are condensed quickly and have certain expansibility and a good roof-contacting effect to ensure that surface subsidence can be effectively controlled.
Description
Technical field
The present invention relates to the placement method in a kind of filling system, particularly a kind of method of enriching goaf for filling mining.
Background technology
Placement method in existing filling system, as publication number be CN101881180A a kind of " coal mine work area paste-like filling method and shelves sizing device ", the method is to be installed on block pulp device on work plane top row pillar, start filling, until consistent with the height of block pulp curtain like the packed height of lotion, the goaf height is enriched; After filling completes, when like lotion, partly solidifying, not dropping down slurry, then the coal mining that circulates; Then reclaim block pulp device, then withdraw the top row pillar; After work plane reaches a stowing interval, by aforementioned operation, loop.But, during due to bashing, the hydraulic support tail boom occupies certain space and fails filling, thereby there is the goaf of not filling.In order to overcome not bashing, exist, in the filling mining method, its work plane must adopt faces upward oblique mining type, cut eye along the bearing setting, and if to face upward angle of internal friction excessive, although filling effect is good, but wall caving easily occurs in machine road rib, the impact safety in production; If it is too small to face upward angle of internal friction, although the possibility of machine road rib generation wall caving is less, be conducive to safety in production, filling effect is poor.Therefore, in the gallery filling mining, enriching not exclusively of goaf, make top board increase deflection greatly or be caving because of span, and filling operation can't be carried out again, and therefore " three press down coal " also can not get liberation.
In existing filling mining method, stowage unit used has solid packed hydraulic support for working face, anti-four-bar filling hydraulic support, six pillar filling hydraulic supports, certainly rams formula filling hydraulic support, retaining wall type filling hydraulic support and protected type filling hydraulic support etc.These filling hydraulic supports are by front back timber, rear back timber, base, column, linkage, hydraulic system and filling interrupter form, and improvement on this basis, as the improvement to divider wall, the filling hydraulic support that leakproof has been arranged, add some reinforcement mechanisms in the tail boom bottom in addition, filling hydraulic support with ramming mechanism, and for better roof supporting, adopt six pillar brace type filling hydraulic supports, although existing equipment A wide selection of colours and designs, equipment improvement is added, but the existence due to the tail boom of hydraulic support, and filling is like the compression of condensing of lotion, all fail to realize that goaf obtains fully substantial, and filling next time also fails it is made up, therefore, final filling effect is very undesirable.
In existing filling mining method, filler used is all solid filling materials, adopts mine car, wind-force or other machinery by solid packing, as barren rock, sandstone etc., is transported to bashing.Solid filling is because complex procedures, stope duty cycle is long, mining intensity is low and some shortcomings such as deficiency in economic performance, can not meet modern mining production and adopt by force, goes out by force and the demand of strong filling.Hydraulic filling is to utilize mortar pump or gravity flow mode in addition, and the solid-liquid two-phase slurries such as coal preparation plant's tailings, rubble sandstone are transported to down-hole with bashing.But because the hydraulic filling strength of filling mass is inadequate, and non-cementing so that a lot of ore pillars can't back production, and serious waste of resources is eliminated.
Consolidated fill, the inert materials such as fine sand that will gather and process, as common are rubble, river sand, tailings and Gobi aggregate, mix appropriate cementitious material, as cement and lime, add the water mix and blend and make slurry or lotion, carry to goaf and stack along boring, pipe etc. again, then make slurry slough unnecessary water or do not dewater in goaf, form the obturation with some strength and globality, for next step mining provides condition.
With hydraulic filling, compare, the strength of filling mass of consolidated fill is large, and filling velocity is fast, and charging quantity is large, and technique is simple.Along with the development of material science, the diversification of cementitious materials type, add the variation of admixture, makes the composition of slurry, colloid or lotion more complicated and various, adds the development of slurry delivery technology, makes consolidated fill development comparative maturity.Consolidated fill comprises tailing cemented filling, piece stone consolidated fill, high concentration all-tailing cemented filling, pumping paste filling, high-moisture quick-setting filling.Wherein, paste body filling is the developing direction of Cut-and-fill Mining Technology, so-called paste body filling technology is the paste slurry that the solid waste such as compound of spoil or spoil and rubble are processed on ground, by tubing pump, delivers to mining face under mine, in good time the mining technique of bashing.Paste body filling has that filling slurry concentration is high, and setting time is short, and the obturation compression ratio is low, and intensity is high, and cost is low, and obturation is easy to connect top, and the packing job cycle period is short, is conducive to Stope stability and mining safety.But due to the selection of ointment material with proportioning is improper and the pulp quality mark is higher, filling pipeline is easy to stop up.
In above-mentioned existing placement method, stowage unit used and filler, all there is separately different deficiencies, can not realize enriching required substantial space, therefore, invent a kind of stowage unit, and filler is reconfigured, and filling process ground is improved, become the filling imperfection problem in the urgent need to address in the gallery exploitation that solves.
Summary of the invention
The technical problem to be solved in the present invention is in filling system, the problem of failing to enrich fully because of less and last filling space, working face mining inclination angle, and a kind of method of substantial goaf is provided.
In order to address the above problem, the measure that the present invention takes is a kind of method of substantial goaf, comprises the method for bashing; Its described method is in stowing operation, when lotion arrives the elastic baffle position, by the reality that pushes away arranged on the hydraulic support tail boom
devicethe reciprocating sliding elastic baffle, filling is again carried out in the goaf of enriching that fill paste is passed after hydraulic support; Wherein:
Described to push away that actual load puts be, in the hinge joint of the left end of hydraulic support tail boom, advancing jack is arranged, and the right-hand member of advancing jack is connected with elastic baffle;
Described fill paste is to be gangue in mass ratio: flyash; Cementitious materials: water=45%
:20%
:15%
:20% mixes.
In technique scheme, described elastic baffle is 1/3 place that is arranged at the tail boom end; Described elastic baffle is wide with tail boom, highly is greater than the hollow sheeting of tail boom, and is provided with therein spring; The scope of described elastic baffle reciprocating sliding is the right end of 1/3 place of the right end of tail boom to tail boom; The mass fraction of described fill paste is 80%; Described gangue is the former mine gangue that is less than 15 ㎜; The gangue that is less than 5 ㎜ in the described feed coal spoil that is less than 15 ㎜ accounts for 30%-50%; Described cementitious materials is by 85～90% silicate; 2～5% calcium formate, 8～10% expansion agent mixes formation; Described expansion agent is to be sodium chloride 1.2% in mass ratio: sodium thiosulfate 1.5%: Nekal BX 0.3%: water reducing agent JN 0.4%: ammonium chloride 0.8%: aluminium powder 0.8%: iron powder 95% mixes formation.
Implement the method in a kind of substantial goaf provided by the present invention, compared with prior art, the inventive method is on the basis of existing bashing method, the substantial method again of carrying out, its main feature is in stowing operation, when lotion arrives isolation baffle plate upper position, advancing jack on tail boom push-and-pull elastic baffle is back and forth passed the support back by lotion, and then the unsubstantial place filling again to a upper filling class, particularly formed space and lotion solidify the formed sinking of compression and carry out filling when moving after frame that tail boom is removed, move in circles, next one filling class makes up successively to a upper filling class, final substantial whole goaf, the sinking on earth's surface is played to effective control.The secondth, be provided with on the tail boom of hydraulic support and push away actual load and put, enrich goaf (II) for again enriching, and it is simple to push away the actual load interposed structure, easy to operate; The 3rd is to realize substantial ointment material, and this ointment material adopts former mine raw material, through the different proportionings of granular size, realized the facility of carrying and controlling, and rate of set is fast, has certain dilation, connects the top effect remarkable; It is larger that this ointment material also has a modulus of elasticity, Poisson is smaller, the compression yield face is larger, the supporting capacity of obturation is stronger, obturation has certain early strength, later strength continues to increase, and the obturation compression ratio is significantly less than the compression ratio of sand, spoil powder and flyash, and the surface subsidence amount is less.
The accompanying drawing explanation
Fig. 1 is hydraulic support overall structure schematic diagram of the present invention;
Fig. 2 is elastic baffle of the present invention mechanism upward view.
In figure: 1: back timber; 2: articulated structure; 3: advancing jack; 4: tail boom; 5: front column; 6: rear column; 7: the tail boom jack; 8: the isolation baffle plate; 9: the baffle plate jack; 10: base; 11: elastic baffle; 12: push rod; 13: spring.
The specific embodiment
Below the mode of specifically executing of the present invention is further detailed:
Implement the method in a kind of substantial goaf provided by the present invention, it is a kind of method of enriching goaf in existing filling system, the thinking that realizes the method is to push away actual load by setting and design to put and configure the ointment material that enriches goaf, to reach the purpose of enriching goaf, specific implementation process is as follows:
In order to guarantee that filling mining implements smoothly, design the special comprehensive hydraulic pressure of adopting and enrich support, this support should meet following basic demand: (1) support action to work plane coal mining activity space top board.Consistent in the face of the requirement of support with common working face.Adopt whole fill, the periodic weighting phenomenon does not appear in the filling mining work plane, to filling support work plane resistance, requires less.The requirement supporting intensity is 0.35MPa, and the supported face resistance is 4500KN.(2) work plane is treated to the support action of filling space top board.The Yu Dai filling space supporting of work plane coal mining activity space determines the front roof to floor convergence of filling jointly, this directly has influence on the roof to floor convergence before filling, for create good condition to filling, improve filling and control the subsidence effect, the supporting of Yu Dai filling space, work plane coal mining activity space must, when guaranteeing support space safety, reduce the front roof to floor convergence of filling.(3) to the not protective effect of the new obturation of condensation cure.Filling slurry condensation cure plays certain supporting role to supporting oneself and have the ability to roof and floor, prevent that the immediate roof inbreak from destroying, at least need the 4h left and right, in order to improve filling operation face coal production ability, guarantee can arrange coal work after filling completes, even limit coal mining limit filling, need the filling support when guaranteeing work plane coal mining reach, can continue to keep the support action to new obturation.(4) buffer action,, in stowing operation, the filling support plays the effect of isolation filling area, guarantees that filling connects top, prevents that the filling slurry from flowing into work plane and affecting production.(5) be convenient to implement gob side entry retaining, require head, tail support can realize gob side entry retaining.
The present invention is on the basis of existing technology, hydraulic support is carried out improved, comprises back timber 1, front column 5, rear column 6, base 10, tail boom 4, isolation baffle plate 8, tail boom jack 7, baffle plate jack 9 and elastic baffle 11.Elastic baffle 11 not only can form divider wall, can also carry out effective supporting to tail boom 4, when fill paste arrives elastic baffle 11 upper position, tail boom jack 7 on tail boom 4 is push-and-pull elastic baffle 11 back and forth, shift lotion onto top, support back unsubstantial place, particularly on tail boom 4, be equipped with and pass tail boom jack 7 and the telescopic elastic baffle plate 11 moved after lotion;
Advancing jack 3 left ends and tail boom 4 left ends are hinged, and right-hand member is connected with elastic baffle 11, and the maximum thrust of advancing jack 3 is 2000KN; Tail boom 4 is provided with the track that elastic baffle 11 moves, and has both facilitated the movement of elastic baffle 11, prevents again the wearing and tearing of elastic baffle 11;
1.6-2.5 meters of support heights, 1.4-1.6 meters of supporting width, 1.5 meters of center to center distance, setting load 4470 KN, working resistance 4800 KN, supporting intensity 0.35 MPa, front column setting load 801 KN, working resistance 865 KN, cylinder diameter/post footpath is 180/ 160, advancing jack cylinder diameter/post footpath is 160/ 105, rear column setting load 633 KN, working resistance 670 KN, cylinder diameter/post footpath is 160/ 130, all adopts high-strength steel sheet to make.
The selection of filler, tests study analysis to the mechanical property of paste filling material, modulus of elasticity can be considered the index of weighing material production elastic deformation complexity, its value is larger, the stress that makes material that certain elastic deformation occur is also just larger, be that material stiffness is larger, that is, under certain effect of stress, elastic deformation occur less.With the filler of other type, compare, the modulus of elasticity of paste filling material is larger.The modulus of elasticity of ointment material is controlled and is had a great impact the earth's surface deflection; Modulus of elasticity is larger, and the compression yield face is larger, and the obturation supporting capacity is stronger, and decrement is just less, and the surface subsidence amount is less.
The paste body filling technology that professor Sun Henghu proposes has pointed out that paste filling material has larger modulus of elasticity and less poisson's ratio; Obturation has certain early strength, and later strength continues to increase; The obturation compression ratio is significantly less than the compression ratio of sand, spoil powder and flyash.
Flyash is brought into play the micro-aggregate effect in filler, at the cementitious matter volume, under condition seldom, guarantees that lotion has good processing performance, is guaranteeing under the safe transport condition, has created advantage for improving pulp density, and then has improved the effect of obturation.
In gangue, main phase comprises quartz, kaolin, muscovite, potassic feldspar and chlorite etc., and activating coal gangue is processed, and designs the Coal Gangue Paste Filling Material that processability is good by match materials simultaneously; The physical property of the Coal Gangue Paste Filling Material made, mechanical property etc. all can meet national cement standard requirement, can be for the mining area paste body filling.With cement concrete, compare, the prepared concrete of Coal Gangue Paste Filling Material possesses better durability.
The lotion cementitious matter is to take Portland cement as base material, composite material with early solidifying agent and the preparation of expansion agent science, after material adds the water mixing, the initial stage rapid water condensed changes into the high crystallization water compound-entringite of appropriate amount, crystallization water molecule volume is up to 81.16%, reach rapid hardening, early strong effect; The mid-term of condensing and later stage again normally aquation generate the gum materials such as gel of calcium silicate, there are the characteristics of later strength sustainable growth, guaranteed the needs of later strength.
According to above available data and technology, the selection filler is gangue, flyash, cementitious materials and water, and definite mass fraction.After paste filling material is prepared into the lotion that can carry, must meet certain requirement, there is good stability, mobility and plasticity, mobility refers to that it can flow, and does not produce segregation when mobile, not stratified, meet requirement of strength simultaneously, the mass fraction of lotion is crucial.Increase mass fraction, the mobility of lotion reduces, and is unfavorable for carrying, and pumping pressure is increased, and conveying capacity reduces, and easily causes line clogging; Otherwise, reducing mass fraction, the mobility of slurry will be improved, and pumping pressure is reduced, and improve conveying capacity, but need to add exciting agent, complex technical process.According to document, the critical concentration of lotion is 80.91%.Consider above technology, and, to the actual analysis of new Yang Kuang, the mass fraction of lotion is defined as to 80%.
Fly ash content is 10%-15% the time, and bleeding quantity is large, and slump is good; When fly ash content is 20%, bleeding quantity is moderate, and slump is good; While being greater than 20%, slump is less.The flyash ratio raises, and slump diminishes thereupon, and bleeding quantity is more and more less, illustrates and increases fly ash content, and slip thickens, and bleeding is few, and the bulk strength value changes not quite, and flyash intensity under 20% proportioning is slightly high.Consider the requirement of filling slurry to bleeding quantity, slump and intensity, when pulp density is 80%, flyash proportion 20% is best.
Get the ratio of flyash 20% and tested, along with the increase of cementitious materials proportioning, slump is along with increase, and the slip mobility is become better and better, and intensity increases thereupon, and during cementitious materials 15%, the each side performance is good.
Determine that thus rational slip proportioning is: cementitious materials 15%, flyash 20%, gangue 45%, water 20%.Finish mix slurry concentration is 80%, and the filling slurry slump is moderate, good fluidity, and bleeding quantity is moderate, and intensity is large.In corresponding every cubic metre of obturation, various material usages are: cementitious materials 285Kg/m^3; Flyash 380Kg/m^3; Gangue 855Kg/m^3; Water 380Kg/m^3.
The preparation of expansion agent, weighing sodium chloride 1.2Kg, sodium thiosulfate 1.5Kg, Nekal BX 0.3Kg, water reducing agent JN 0.4Kg, ammonium chloride 0.8Kg, aluminium powder 0.8Kg, iron powder 95Kg, put in the lump mixer and stir, after stirring, put back to apotheca, keep environmental drying.
Cementitious materials is by Portland cement 85～90%, calcium formate 2～5%, and expansion agent 8～10% evenly mixes.Wherein:
Allocation plan 1: Portland cement 255Kg, calcium formate 15Kg, expansion agent 30Kg stirs;
Allocation plan 2: Portland cement 270Kg, calcium formate 6Kg, expansion agent 24Kg stirs;
Allocation plan 3: Portland cement 264Kg, calcium formate 9Kg, expansion agent 27Kg stirs;
According to the later experiments analysis, scheme 3 is the best configuration scheme, early solidifying and expansion effect is moderate, can plugging in the early stage pipe conveying procedure, and also the later stage rate of set is very fast, and certain dilatancy is arranged.
Spoil is as filling aggregate, for the transportation performance that improves slip the generation that prevents segregation phenomenon, need to be formed by rational grade, can make filler both there is good mobile performance, have again higher strength character, so the gangue fragmentation is processed with following requirement: (1) maximum particle size is less than 15 ㎜; (2) be less than 5 ㎜ particle proportion 40% left and right, minimumly be not less than 30%, the highlyest be not more than 50%.Wherein, one of scheme that the present invention chooses is: 0-5 ㎜ gangue 500Kg, and 5-15 ㎜ 500Kg mix; Two of the scheme of choosing is: 0-5 ㎜ gangue 400Kg, and 5-15 ㎜ 600Kg mix; Three of the scheme of choosing is: 0-5 ㎜ gangue 300Kg, and 5-15 ㎜ 700Kg, three kinds of sides optionally mix and get final product.When being less than 5 ㎜ particle proportion 40% left and right, i.e. 0-5 ㎜ gangue 400Kg, 5-15 ㎜ 600Kg mixed effect the bests.
The fragmentation processing of gangue, according to 0-5 ㎜, two kinds of specification classifications of 5-15 ㎜, storage respectively, then is used in conjunction with by design proportion.Filler allows spoil large or fine granule ratio excursion larger, in order to simplify the spoil crushing system, reduce investment outlay, spoil is by 0-15 ㎜ specification processing, in the spoil processed, need 0-5 ㎜ particles of controlling by regulating crushing engine discharging opening size, change 0-5 ㎜ ratios in broken spoil and guarantee, specifically regulate way, measure 0-5 ㎜ particle proportions in discharging opening size and discharging and determine during the crushing engine Installation and Debugging.In addition, when loader engineer's when filling with substance finds that the bulk particle is relatively concentrated, with the spoil collocation that near particle is less, use.Spoil is worked into below maximum particle size 15 ㎜ from maximum particle size 300 ㎜ fragmentations, and the ratio of reduction of crushing engine will reach more than 20, considers to regulate by crushing engine the needs of 0-5 ㎜ particles and 5-15 ㎜ particles, and the ratio of reduction will reach 30 left and right.
Spoil, flyash, cementitious materials and water storing mode are: the spoil that fragmentation processes leaves the spoil batch bin in, and flyash, the cementitious materials configured leave in respectively in tower silo separately, and water leaves in reservoir.
Concentration according to design, and the ratio of gangue, flyash, cementitious materials prepares the filling slurry, and fully mix, guarantee filler mobile performance, condensation cure performance, down-hole stope filling can reach the overlying strata depression of expection and control target.According to material mixture ratio, test, material flowability can be stablized, the mass concentration amplitude of variation of filling slurry requires, in be controlled at ± 0.5% scope, to necessarily require: (1) material (gangue, flyash, special-purpose cementitious materials, water) metering allowable error≤1.0%; 2, water content detection allowable error≤0.5%.
Proportioning stirs: (1) weighing.Four kinds of material weighings of filling are carried out simultaneously, four blowing gates are set under the spoil batch bin, a mixer of every two services, when batching starts, four blowing gates are all opened, and spoil is put into to weigh belt, when the spoil dosage arrives design load soon, every measuring belt only stays a gate blowing, until reach design load, and after completing the spoil weighing, start weigh belt and the spoil material loading covers the formula belt, the spoil weighed up is delivered to filling building spoil buffering bucket; Flyash, cementitious matter by screw(-type) feeder to reinforced in scale hooper separately, water by water pump from pond to scale hooper in water measurement, reach design load and stop metering.(2) feed intake.Determine that the blowing mouth of mixer closes, mixer is in empty machine state, opens four kinds of materials that scale hooper and spoil buffering bucket will weigh up simultaneously and drops in mixer fast.Close immediately each scale hooper and spoil buffering bucket gate after finishing material.(3) stir.In filler, the cementitious materials consumption is few, and mixing time that need to be longer than general concrete just can be made the second best in quality filling slurry, and each mixing time is set to 50 seconds.(4) blowing.Mixing time reaches 50 seconds, and mixer blowing mouth is opened, and by mixing, good filling slurry is put into the slip bucket, for the filling pump, carries and goes into the well.After slip discharges, closed immediately the blowing door.For improving the system slurrying capacity, after having fed intake, carry out next cycle material weighing work, before a upper tank material mixer is mixed, next circulation is ready to, and so constantly circulation, until design objective all completes.
The flow velocity general control of high concentration ground paste in pipeline is in 1.5m/s, the speed of slurry is too high, and slip flows the waterpower slope that need to overcome will be large, and pipe wear speed is also fast, energization consumes, the too small stowage capacity of flow velocity can not meet production requirement maybe needs increase the filling pipeline internal diameter.Requirement according to colliery to stowage capacity, the filling system design current velocity is relatively large.Employing is usingd gangue as the aggregate of high dense fill slip, and the transporting resistance less, so the filling system flow velocity is designed by following principle: when the maximum stowage capacity of filling pump, guarantee flow velocity 1.8m/s left and right.
In the stowing operation of coal mining, at first filling pipeline is set, the work plane filling pipe is arranged on filling support rear portion, every 15～20 meters, a cloth tube is set.Connect three way cock between work plane filling pipe and cloth tube, utilize three way cock switching controls filling slurry, according to sequentially carrying out successively from low to high filling.For reducing the damage of filling pipeline rinse water to stope and tunnel, gutter is all arranged in work plane two lanes, and gutter is connected fast with the work plane filling pipe, and rinse water is effluxed.
The filling inspection is prepared, and to aboveground lower inspection, contact, the confirmation system is normal, Plant in good condition, be full of clear water in pipeline, and after setting charging quantity on duty, enter mortar and push away water, first pumping is by flyash and glued joint the flyash filling slurry that material is made, and clear water in pipeline is discharged.The spoil slurry pushes away mortar, a small amount of flyash obturation slip can not all be discharged clear water in pipe, mainly the spoil flyash filling slurry of normal filling played to buffer action, when the flyash filling slurry designed is will pumping complete, the spoil flyash filling slurry of normal proportioning is put into to buffering slip bucket, continue pumping, while in pipe, denseer flyash slip occurring, the relevant gate valve of switching, the flyash filling slurry flows into filling area, completes mortar and pushes away the water process.Utilize dust-proof water that a small amount of low concentration flyash slip in the work plane gutter is discharged to the lane that discharges water simultaneously, avoid plugging.
The normal filling of work plane, at first side first cloth tube in haul lane carries out filling, and filling, connects second cloth tube simultaneously, and in closed condition.After first cloth tube filling completes, open immediately second cloth tube hose valve, close first cloth tube, packing fluid turns from the second cloth tube filling.In the second cloth tube filling, connect the 3rd cloth tube, so repeat.In stowing operation, when lotion arrives elastic baffle 11 position, advancing jack 3 on tail boom push-and-pull elastic baffle 11 back and forth is pressed to the support back to lotion, to the not place filling again of filling of a upper filling class, particularly to moving after frame when tail boom is removed the space and the lotion that form, solidify the sinking that compression forms, move in circles, whole goaf, to a upper filling class filling again, is finally enriched by next filling class.
Filling area completes the cloth tube of filling and removes in time and clean, and after having cleaned, then cloth tube is connected, and after the filling task completes, carries out last bath and presses wind to clean.While being fills up to last root cloth tube filling scope, analyzing at any time and treat filling space, approximately 110 cubic metres the time in time notice Filling Station control room control charging quantity.When last cloth tube filling has approached, open work plane main line bottom valve, close last cloth pipe valve after being full of.The order of filling is carried out to high-end successively by the work plane low side, is filled to when two cloth tubes are middle installs divider wall, and two adjacent cloth tubes carry out filling in turn, are controlled at switching time in 15～20 minutes, in order to avoid because slurry solidifies, pipeline jam accident occurs.In stowing operation, need the special messenger observe the strong stressed and obturation of the isolation in upper and lower two lanes of work plane and connect the top situation, if in stowing operation, divider wall deforms because of stressed, must take measures in time to be processed and be reported to scene footman team leader; The control of appeal cloth tube filling order adopts the hose valve switching controls.
Filling is checked and accepted and is solidified maintenance, and after filling operation face finishes, the obturation setting time needs about 4 hours, fixes on maintenance crew and solidifies.
In the concrete enforcement in new positive colliery, the design of work plane filling mining adopts " four or six " duty, and every two classes is a circulation, in a circulation, mines and supporting, next class of filling are carried out in the gob side entry retaining tunnel for one class.The class's of coal mining design per tour three cuttves, coal-winning machine cuts dark 0.8 meter, effective 0.7 meter/cutter of drilling depth, three 2 meters, cutter drilling depth calculating, so two class's of coal mining daily footages are 4 meters/day.100 meters of normal operation face length degree, 2.15 meters of mining heights, according to 1.35 tons/cubic metre of coal density, work plane recovery ratio 95%, year work consideration in 330 days, a work plane has a daily output of 1103 tons/day, and 36.4 ten thousand ton/years of annual productions, meet requirements of plan.Annual will process a large amount of spoils and flyash, and significantly reduce the pollution to environment of spoil, flyash, minimizing spoil, flyash are processed shared soil.Realize under-village mining, avoid workers and peasants' contradiction.New other village protection pillar of Yang Kuang also can be applied filling technique exploited.The filling mining technology can promote the use of other each ore deposits of group, solves the mining problem that each ore deposit three presses down coal and fills unreal problem, and then promoting the use of other mining areas, the whole nation.
Claims (2)
1. the method in a substantial goaf, comprise the method for bashing; Its described method is in stowing operation, when fill paste arrives elastic baffle (11) position, put reciprocating sliding elastic baffle (11) by the upper actual load that pushes away arranged of hydraulic support tail boom (4), filling is again carried out in the goaf (II) of enriching that fill paste is passed after hydraulic support;
Described to push away that actual load puts be, in the hinge joint of the left end of hydraulic support tail boom (4), advancing jack (3) is arranged, and the right-hand member of advancing jack (3) is connected with elastic baffle (11);
Described fill paste is to be gangue in mass ratio: flyash: cementitious materials: water=45%
:20%
:15%
:20% mixes;
Described elastic baffle (11) is 1/3 place that is arranged at the right end of tail boom;
Described elastic baffle (11) is that width is identical with tail boom, highly is greater than the hollow sheeting of tail boom, and is provided with therein spring (13);
The scope of described elastic baffle (11) reciprocating sliding is the right end of 1/3 place of the right end of tail boom to tail boom;
Described gangue is the former mine gangue that is less than 15 ㎜;
The gangue that is less than 5 ㎜ in the described former mine gangue that is less than 15 ㎜ accounts for 30%-50%;
Described cementitious materials is to be 85～90% silicate in mass ratio
﹕2～5% calcium formate
﹕8～10% expansion agent mixes formation;
Described expansion agent is to be sodium chloride 1.2% in mass ratio: sodium thiosulfate 1.5%: Nekal BX 0.3%: water reducing agent JN 0.4%: ammonium chloride 0.8%: aluminium powder 0.8%: iron powder 95% mixes formation.
2. the method in substantial goaf as claimed in claim 1, the mass fraction of its described fill paste is 80%.
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| CN102493839B true CN102493839B (en) | 2013-12-25 |
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| CN102924010A (en) * | 2012-10-19 | 2013-02-13 | 太原理工大学 | Self-compaction filling paste body and preparation process thereof |
| CN103382849B (en) * | 2013-07-31 | 2015-09-09 | 安徽理工大学 | A kind of paste body filling method after filling hydraulic support frames |
| CN103510984B (en) * | 2013-10-23 | 2015-05-20 | 中国矿业大学 | Method for designing filling mining mass ratio of solid filling and coal mining |
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| CN105152595A (en) * | 2015-07-29 | 2015-12-16 | 兰州有色冶金设计研究院有限公司 | Shock-absorption expansion filling material used for filling deep goaf and preparation method |
| CN112094091B (en) * | 2020-10-30 | 2022-04-22 | 成都欧美克石油科技股份有限公司 | Large-temperature-difference low-heat-conductivity cement slurry suitable for long-sealing-section well cementation |
| CN112505040B (en) * | 2020-11-17 | 2022-10-28 | 山东科技大学 | Carbon dioxide sequestration determination system and determination method based on filling paste |
| CN113339056A (en) * | 2021-06-24 | 2021-09-03 | 中国矿业大学 | Fluidized gangue layer surface subsequent filling system and method |
| CN117266922B (en) * | 2023-10-17 | 2024-03-19 | 济宁矿业集团矿产资源勘查开发有限公司 | Postmining filling water-reducing process and postmining filling water-reducing equipment for goaf of shallow-buried thin coal seam coal mine |
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| PL127203B1 (en) * | 1979-11-29 | 1983-10-31 | Ct Kt Maszyn Gorniczych Komag | Shiftable mine dam |
| CN101008315B (en) * | 2007-02-07 | 2010-07-07 | 邸建友 | Paste-like backfill technology used in coal cutting area |
| CN201835851U (en) * | 2010-09-14 | 2011-05-18 | 中国矿业大学 | Coal face end timbering, filling and transshipping system |
| CN102135006A (en) * | 2011-02-18 | 2011-07-27 | 河南理工大学 | Automatic tamper type waste filling hydraulic support |
| CN201982127U (en) * | 2011-03-11 | 2011-09-21 | 沈阳天安矿山机械科技有限公司 | Multistage plug-in connecting rod type filling hydraulic support |
| CN201953393U (en) * | 2011-05-31 | 2011-08-31 | 高九华 | Reverse four-link type filling hydraulic support with compaction function |
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Inventor after: Feng Guorui Inventor after: Guo Xiaoyan Inventor after: Gao Hongyu Inventor after: Qi Tingye Inventor after: Guo Yuxia Inventor after: Zhang Yujiang Inventor after: Guo Jun Inventor after: Kang Lixun Inventor after: Han Yulin Inventor before: Feng Guorui Inventor before: Guo Xiaoyan Inventor before: Gao Hongyu |
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