CN109356590B - Construction method of underground vertical coal bunker - Google Patents
Construction method of underground vertical coal bunker Download PDFInfo
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- CN109356590B CN109356590B CN201811148274.XA CN201811148274A CN109356590B CN 109356590 B CN109356590 B CN 109356590B CN 201811148274 A CN201811148274 A CN 201811148274A CN 109356590 B CN109356590 B CN 109356590B
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- 239000003245 coal Substances 0.000 title claims abstract description 128
- 238000010276 construction Methods 0.000 title claims abstract description 117
- 238000005553 drilling Methods 0.000 claims abstract description 100
- 238000000034 method Methods 0.000 claims abstract description 73
- 238000007789 sealing Methods 0.000 claims abstract description 63
- 230000008569 process Effects 0.000 claims abstract description 47
- 238000009434 installation Methods 0.000 claims abstract description 25
- 238000002360 preparation method Methods 0.000 claims abstract description 11
- 238000009415 formwork Methods 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 67
- 239000010959 steel Substances 0.000 claims description 67
- 239000004567 concrete Substances 0.000 claims description 24
- 239000011435 rock Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims description 7
- 238000009423 ventilation Methods 0.000 claims description 7
- 230000001680 brushing effect Effects 0.000 claims description 6
- 238000007796 conventional method Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 239000002893 slag Substances 0.000 claims description 5
- 239000002023 wood Substances 0.000 claims description 5
- 239000011378 shotcrete Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims 1
- 238000005065 mining Methods 0.000 abstract description 11
- 239000000725 suspension Substances 0.000 abstract description 5
- 241000273930 Brevoortia tyrannus Species 0.000 description 91
- 230000015572 biosynthetic process Effects 0.000 description 17
- 238000010586 diagram Methods 0.000 description 4
- 238000005422 blasting Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D3/00—Raising shafts, i.e. working upwards from the bottom
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/04—Lining shafts; Linings therefor with brick, concrete, stone, or similar building materials
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- 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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/16—Modification of mine passages or chambers for storage purposes, especially for liquids or gases
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Abstract
The invention discloses a construction method of an underground vertical coal bunker, which comprises a construction process of a large reverse well drilling machine and a short-section digging and building process of an integral template, wherein the construction process of the large reverse well drilling machine comprises the following steps: preparing a drilling machine construction site: installing a drilling machine, guiding hole operation, reaming operation and shaft casing operation; the integral formwork short-section digging and building process comprises the following steps: the construction method has the advantages that the construction preparation, the fore shaft construction, the suspension system installation, the sealing plate installation, the bin barrel construction, the loading chamber construction, the coal distributor and inclined plane construction and the fore shaft pouring are realized, the construction method can realize the full-series coal bin construction from the small diameter to the super large diameter, the construction method realizes the intrinsically safe and efficient daily average well completion exceeding 2m, and the coal mining efficiency of a mine and the labor intensity of workers are greatly improved.
Description
Technical Field
The invention relates to a construction method of a vertical coal bunker, in particular to a construction method of an underground vertical coal bunker.
Background
With the innovation of industrial technology and the development of process, the era of traditional manual coal and gangue discharge of mine cars has become past, particularly in the last 10 years, the national demand for energy is increased year by year, while traditional coal resources occupy most of specific gravity, a batch of ultra-large coal mines are newly built, the yield of a single well is thousands of tons of coal mines, the construction mechanization and automation level is obviously improved, and the laggard production modes in the past are gradually eliminated, such as: the tunneling mechanization and the transportation are automatic, and the mechanization degree of some coal mines reaches more than 80 percent, so that a new step is formed in the production of coal.
However, with the development of these technologies and processes, some backward supporting projects can not meet the field requirements, such as: the single-side 300-ten-thousand-ton underground transportation system cannot meet the requirements, so that the yield cannot reach the standard, a skimming and hooking delay point of workers is serious, the fast coal rock roadway tunneling process and a goods discharging system cannot be coordinated, and the like. To solve the above two problems, coal bunkers with various functions must be built underground, and the following problems can be solved by arranging the coal bunkers:
1) the problem that the coal (gangue) hole is easy to block in the past is solved;
2) according to different requirements, bins with different sizes are built, a certain amount of coal or gangue can be stored, and great convenience is brought to construction;
3) the system is optimized, one or more coal bunkers are built in the middle of the whole belt conveying system, the running load of the belt can be effectively reduced, centralized production, centralized shipment and segmented maintenance can be realized, and the stability of the system is ensured;
4) the problem of unnecessary skimming and hooking delay points of workers is solved, coal mining workers can leave the work as long as the yield is achieved and the coal which cannot be lifted temporarily exists in an underground coal bunker, and the labor intensity of the workers is reduced.
However, the construction process of the coal bunker is complex, the construction difficulty is high, the safety risk is high, and the construction period is long, so generally, except the coal bunker at the bottom of the main shaft, the coal bunker is rarely built in each large mining area, and the construction process of the coal bunker in the past is relatively lagged, especially for the construction of the coal bunkers with large bunkers and deep bunkers, no effective method is provided in the existing construction process, for example, in the face of:
1) the small-diameter coal bunker or hole with the diameter of 2m-4m is not provided with a good method, at present, the construction process of the small hole with the diameter of less than 2m by using a reverse well large drilling machine is mature, but the small bunker with the diameter of 2m-4m is not widely applied, and some technical difficulties are not well solved.
2) The construction process of the large and medium size warehouse with the size of more than 4m has potential safety hazards: the rib stripping problem of the primary brushing expansion, the safety problem of the personnel going up and down, the anti-falling problem and the like.
3) The tunnel can not be formed once, the primary support of anchor net spraying in the early stage and the secondary permanent support of the sleeve wall in the later stage are needed, the tunnel forming speed is low, the process is complex, and the construction period is long.
Aiming at the defects of the prior art, an effective construction method for erecting the coal bunker is not provided so far.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the technical problem that medium-sized bins of 2-4m and large bins of more than 4m are difficult to construct is solved, and a full-series coal bin construction method capable of realizing small-diameter to super-large-diameter is provided.
The invention solves the technical problems through the following technical scheme:
a construction method of an underground vertical coal bunker comprises the steps that a reverse-well large-drill construction process is adopted for a small bunker with the size of 2-4m, and an integral template short-section digging and building process is adopted for a large and medium bunker with the size exceeding 4 m;
the construction process of the raise boring machine comprises the following steps:
s1, preparing a drilling machine construction site: determining that the size of the installation chamber meets the installation requirement;
s2, installing a drilling machine: after the installation construction in the step S1 is finished, constructing an anchor cable of the hoisting and well reversing large drilling machine;
s3, guide hole operation: the method comprises the following steps of (1) utilizing a reverse well large drilling machine to drill a guide hole, supplying high-pressure water before drilling by continuously connecting a drill rod along with the increase of the drilling depth of the guide hole, and continuously drilling the guide hole after the high-pressure water flows out of the hole;
s4, reaming: reaming is carried out after the guide hole is drilled, and the drilling speed is adjusted according to the hardness of the rock stratum;
s5, well casing wall operation: the well casing wall operation adopts one of the following two modes:
1. pouring sprayed concrete, namely performing sprayed concrete supporting operation from top to bottom by utilizing an up-down self-stabilizing hanging scaffold; 2. the method comprises the following steps of (1) adopting a steel sleeve retaining wall, pouring and filling pouring concrete between a sleeve and a well wall, after the wall sleeving operation is finished, pouring and plugging concrete at a lower opening of the wall sleeving for multiple times, and after the lower opening of the wall sleeving is poured and plugged, pouring a locking opening;
the integral formwork short-section digging and building process comprises the following steps:
t1, start-up: adopting a raise boring machine to carry out mucking, ventilation and drainage during the construction period of the coal bunker;
t2, construction preparation: before the coal bunker is constructed, a lifting head sheave and a lifting winch are arranged on a roadway top plate;
t3, mounting of a sealing plate: constructing the coal bunker from top to bottom, assembling the templates in sequence after assembling the blade feet on the bottom plate of the bunker barrel, pouring the coal bunker to the sealing plate after the assembly is finished, and sealing the sealing plate;
t4, construction of a silo: according to the height of the template, short-digging and short-building the coal bunker from top to bottom, and adopting plain concrete to pour when constructing the bunker barrel section;
t5, construction of a loading chamber: the loading chamber construction comprises expanding by brushing, laying floor layer I-steel, reserving a coal chute and pouring in a vertical mold until the rectangular section floor concrete pouring work is finished;
t6, coal distributor and slope construction: according to the conventional method for constructing the coal distributor and the inclined plane, the construction is carried out on the coal distributor and the inclined plane;
t7, pouring a locking notch: the locking port is communicated with the loading chamber, the coal bunker is constructed to the inclined plane of the lower locking port through the full section to stop wall building, the coal bunker is constructed to the bottom of the bunker by adopting an anchor net spraying method, the hopper on the inclined plane of the coal bunker is uniformly poured after the construction of the loading chamber is finished, and channel steel is embedded in the bunker port to form a 'well' -shaped frame.
Preferably, the rig construction site preparation in the step S1 further includes installing a slow-twisting device, a circulation tank device and a raise boring machine base.
Preferably, the anchor cable of the raise-boring rig and the raise-boring rig are arranged as follows:
hoisting anchor cables are constructed at the A, B, C, D, E, F, G, H, I, J point of the upper opening of the drilling hole, A, B, C, D four points are used for installing a large raise boring machine body, C, D, G, H four points are used for dismantling the large raise boring machine and a base, A, B, E, F four points are used for dismantling a drill bit of the raise boring machine, and G, H, I, J four points are used for loading and unloading the large raise boring machine and the drill bit of the raise boring machine.
Preferably, in the step S3, during the drilling process of the guide hole, the formation condition is judged according to the return slag performance parameters, when the guide hole is drilled into a complete formation, the drilling speed is controlled to be 1-1.8m/h, and when the guide hole is drilled into a broken and unstable formation, the drilling speed is controlled to be 0.3-1 m/h.
Preferably, in the step S4, the drilling rate of the hard rock stratum is controlled to be 0.5-1.0 m/h, and the drilling rate of the soft rock stratum is controlled to be 1.0-2.0 m/h.
Preferably, in the step T1, the diameter of the silo of the coal bunker is controlled to be 1.2-1.4m below 7m and 1.8m above 7m, so as to ensure that the deviation between the vertical line of the center of the drill hole and the vertical line of the center of the coal bunker is not more than 480 and 500 mm.
Preferably, the lifting head sheave of the step T2 includes: the lifting winch comprises 7 parts.
Preferably, the hoisting winch comprises: the JSDB-19 hoisting winch of part 1 and the JH-8 hoisting winch of part 6 use a steel wire rope of 6 multiplied by 19+ FC-23-1770 rotation resistance steel wire rope.
Preferably, when the coal bunker is constructed to 1.8m from top to bottom in the step T3, the digging and building operation is stopped, the assembling mode of the formwork is sequential assembling from top to bottom, after the assembling is completed, the pouring is stopped after the pouring is started to the sealing plate, the steel beam nest is reserved, the sealing plate is built on the steel beam nest, and the building method of the sealing plate is as follows:
the beam body structure of the sealing disc is built by I-steel, the sealing of the sealing disc is sealed by a 60-70mm wood board to seal the coal bunker, a lifting port, a concrete sliding port and an air duct port are reserved during sealing, a common vent port is reserved on the side edge, an integral template ground rolling frame is arranged on the side edge of the coal bunker, and then a safety door is arranged.
Preferably, the I-steel is made of steel with the upper part of 25b and the lower part of 32 a.
Preferably, two 11# mining i-steel bin openings are embedded with two 32b channel steels above the framework in the step T7, the embedded 32b channel steels form a "well" -shaped framework, and the two 11# mining i-steel are embedded above the framework.
Compared with the prior art, the invention has the following advantages:
compared with the prior art, the construction process of the reverse well large drilling machine has the following advantages:
1) the method firstly solves the underground explosion-proof problem of large-scale equipment, and all the electric equipment of the drilling system and the rear matching system are subjected to explosion-proof treatment according to national coal mine safety requirements.
2) Due to the limitation of underground transportation and roadway size, large components of the drilling machine are designed in rows, so that the strength requirement required by use can be ensured, and the drilling machine can smoothly enter a well, be transported and be installed.
3) The drill bit is locked in the worst condition when the drill hole is drilled by a long drill construction, the drill bit is difficult to handle and has high danger, and the drill bit is buried after being locked frequently. The construction method designs the means that the drill bit can be slightly deformed, the weak layer and the coal layer are reinforced in advance, the wall protection liquid is used for wall protection treatment during drilling, the pressure of the drill bit is reasonably selected, and the occurrence of locking during drilling of the drill bit is prevented.
4) For small-diameter bins, the steel plate wall protection process adopted by bins below 2m is mature. However, the steel plate wall protection process is not applicable to the bin with the thickness of more than 2m, concrete supporting construction needs to be carried out on the bin, the wall protection treatment is carried out by adopting the small hanging scaffold and the high-strength concrete spraying process, and the method has the advantages of high construction speed, safety and reliability and capability of reducing the concrete pouring loss of the bin capacity.
5) And (3) drilling a discharge hole in the roadway in advance, discharging gas from the coal seam, performing grouting treatment, reducing the speed during drilling, discontinuously drilling and other measures to control the gas content in the bin barrel.
Compared with the prior art, the integral formwork short-section digging and building process has the following advantages:
1) the assembly and disassembly are convenient, the templates are processed in a partitioning mode and are integrally assembled, the operation of entering a well and transporting is convenient, and meanwhile, the assembly operation is light.
2) The template can be processed into different diameters according to the size of the silo, has strong adaptability, can be processed from more than 4m to 10m, and is suitable for large and medium silo operation.
3) The template adopts automatic stretching device, can prop the mould automatically and the drawing of patterns, lifts by crane and transfers and adopts the centralized control winch control, can realize transferring smoothly and lift by crane the operation, reduces unnecessary manual operation.
4) Realize one-time lane formation and build along with digging. The traditional silo construction is that the bottom is dug firstly, and then the roadway is poured section by section from bottom to top, but the construction method is a one-time roadway forming mode of short-section digging and building circulating operation, so that the later-stage pouring construction is reduced, the primary support is cancelled, the process is simplified, the speed is increased, and the cost is reduced. More importantly, the bin body is in a lane at one time, so that the problem of rib caving and falling prevention caused by high rib is solved.
5) The guide cave is innovatively utilized to realize a downward ventilation and downward delivery system, a reverse well drilling hole with the diameter of about 1m is firstly constructed in the bin, natural ventilation in the bin is realized by utilizing the reverse well drilling hole, and the reverse well drilling hole is simultaneously used as a delivery channel. The bin body is transferred and the belt and the scraper loader are used for discharging, so that the operation is convenient and quick, and the operation can be performed in parallel with the operation personnel in the bin body.
6) The sealing plate is arranged above the bin, so that the personnel and the equipment can conveniently enter the bin through the bucket from the upper opening, and the problem of falling prevention of the bin is solved.
Drawings
FIG. 1 is a flow chart of a construction process of a reverse well drilling rig in an embodiment of the invention;
FIG. 2 is a construction flow chart of short-section digging and building of the integral formwork in the embodiment of the invention;
FIG. 3 is a schematic representation of the dimensions of a raise boring machine and a chamber in an embodiment of the present invention;
figure 4 is a schematic diagram of the dimensions of a chamber in an embodiment of the invention;
FIG. 5 is a diagram illustrating cable layout positions in an embodiment of the present invention;
FIG. 6 is a diagram illustrating how a raise boring machine is constructed according to an embodiment of the present invention;
FIG. 7 is a diagram illustrating the installation of the hoisting winch and the head sheave in the embodiment of the present invention;
wherein, 1# is a lifting winch; the model stabilizing winch is 2# to 5 #; no. 6 is a conveying pipe suspension winch; 7# is a later-stage air duct suspension winch; no. 8 is a grate net suspension winch; the No. 9 is a wind-water pipe suspension winch; JSDB-19 is selected for the No. 1 winch, and JH-8 is selected for the other winches.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
Example 1
A construction method of an underground vertical coal bunker comprises the steps that a reverse-well large-drill construction process is adopted for a small bunker with the size of 2-4m, and an integral template short-section digging and building process is adopted for a large and medium bunker with the size exceeding 4 m;
the construction process of the raise boring machine comprises the following steps:
s1, preparing a drilling machine construction site: starting, and determining that the size of the installation chamber meets the installation requirement;
s2, installing a drilling machine: after the installation construction in the step S1 is finished, constructing an anchor cable of the hoisting and well reversing large drilling machine;
s3, guide hole operation: the method comprises the following steps of (1) utilizing a reverse well large drilling machine to drill a guide hole, supplying high-pressure water before drilling by continuously connecting a drill rod along with the increase of the drilling depth of the guide hole, and continuously drilling the guide hole after the high-pressure water flows out of the hole;
s4, reaming: reaming is carried out after the guide hole is drilled, and the drilling speed is adjusted according to the hardness of the rock stratum;
s5, well casing wall operation: sequentially finishing the wall sleeving operation from top to bottom, after the wall sleeving operation is finished, pouring and plugging the lower opening of the wall sleeving for multiple times by adopting concrete, and after the lower opening of the wall sleeving is poured and plugged, pouring the locking opening;
the construction process of the reverse well drilling rig is shown in figure 1.
The integral formwork short-section digging and building process comprises the following steps:
t1, start-up: adopting a raise boring machine to carry out mucking, ventilation and drainage during the construction period of the coal bunker;
t2, construction preparation: before the coal bunker is constructed, a lifting head sheave and a lifting winch are arranged on a roadway top plate;
t3, mounting of a sealing plate: the coal bunker is constructed from top to bottom, after the bin barrel bottom plate is assembled with the blade feet, the templates are sequentially assembled, after the assembly is finished, the sealing plate is poured, the sealing plate is sealed, wherein before the sealing plate is installed, the bin body is constructed by a section of height to meet the requirements of installing the whole metal template, sealing the sealing plate and blasting the safe distance, and the height of the section is generally 6 meters. The bin barrel at the section is integrally cast and formed at one time, and then a sealing disc is installed, a steel wire rope is hung, a bucket is hung, a template winch is debugged, a lifting winch is debugged and the like;
t4, construction of a silo: according to the height of the template, short-digging and short-building the coal bunker from top to bottom, and adopting plain concrete to pour when constructing the bunker barrel section;
t5, construction of a loading chamber: the loading chamber construction comprises expanding by brushing, laying floor layer I-steel, reserving a coal chute and pouring in a vertical mold until the rectangular section floor concrete pouring work is finished;
t6, coal distributor and slope construction: according to the conventional method for constructing the coal distributor and the inclined plane, the construction is carried out on the coal distributor and the inclined plane;
t7, pouring a locking notch: the locking port is communicated with the loading chamber, the coal bunker is constructed to the inclined plane of the lower locking port through the full section to stop wall building, the coal bunker is constructed to the bottom of the bunker by adopting an anchor net spraying method, the hopper on the inclined plane of the coal bunker is uniformly poured after the construction of the loading chamber is finished, and channel steel is embedded in the bunker port to form a 'well' -shaped frame. Specifically, the method comprises the following steps: two 11# mining I-steel bin openings are embedded with two 32b channel steels, the two embedded 32b channel steels form a well-shaped frame, and two 11# mining I-steels are tiled above the frame.
The construction process of the whole formwork short-section digging and building is shown in figure 2.
The preparation of the rig construction site in the step S1 further includes installing a slow twisting device, a circulation tank device, and a big reverse rig base.
The arrangement method of the anchor cable of the large well-reversing drilling machine and the large well-reversing drilling machine comprises the following steps:
four points of a hoisting anchor rope A, B, C, D are constructed at the A, B, C, D, E, F, G, H, I, J point of the upper opening of the drilling hole and used for installing a large raise boring machine body, C, D, G, H four points are used for dismantling the large raise boring machine and a base, A, B, E, F four points are used for dismantling a drill bit of the raise boring machine, and G, H, I, J four points are used for loading and unloading the large raise boring machine and the drill bit of the raise boring machine. Specifically, the size of the installation chamber needs to be determined before the raise boring machine is installed, the installation requirement is met, the specific size of the installation chamber is shown in fig. 3, the position relation between the raise boring machine and the installation chamber is shown in fig. 4, and the arrangement position of the anchor cable is shown in fig. 5.
In the step S3, during the drilling process of the pilot hole, the formation condition is determined according to the return slag performance parameters, when the pilot hole is drilled into a complete formation, the drilling speed is controlled to be 1.8m/h, and when the pilot hole is drilled into a broken and unstable formation, the drilling speed is controlled to be 1 m/h.
In the step S4, the drilling speed of the hard rock stratum is controlled to be 1.0m/h, and the drilling speed of the soft rock stratum is controlled to be 1.0-2.0 m/h.
In the step T1, the diameter of the silo of the coal bunker is controlled to be 1.4m below 7m and the diameter of the silo above 7m is controlled to be 1.8m, so that the deviation between the vertical line of the center of the drill hole and the vertical line of the center of the coal bunker is not more than 500mm, wherein the construction mode of the raise boring drill is shown in fig. 6;
wherein the lifting head sheave of the step T2 includes: the lifting winch comprises 7 parts, and the installation modes of the lifting winch and the head sheave are shown in fig. 7;
wherein the hoisting winch comprises: the JSDB-19 hoisting winch of part 1 and the JH-8 hoisting winch of part 6 use a steel wire rope of 6 multiplied by 19+ FC-23-1770 rotation resistance steel wire rope.
And in the step T3, when the coal bunker is constructed to 1.8m from top to bottom, the digging and building work is stopped, the assembly mode of the template is sequential assembly from top to bottom, the pouring is stopped after the pouring is started to the sealing plate, the steel beam nest is reserved, the sealing plate is built on the steel beam nest, and the building method of the sealing plate is as follows:
the beam body structure of the sealing disc is built by I-steel, the seal of the sealing disc is sealed by a 70mm wood board to seal the coal bunker, a lifting port, a concrete sliding port and an air duct port are reserved during sealing, a common vent port is reserved on the side edge, an integral template ground rolling frame is installed on the side edge of the coal bunker, and then a safety door is installed.
Wherein, the I-steel selects steel with the upper part of 25b and the lower part of 32 a.
Example 2
A construction method of an underground vertical coal bunker comprises the steps that a reverse-well large-drill construction process is adopted for a small bunker with the size of 2-4m, and an integral template short-section digging and building process is adopted for a large and medium bunker with the size exceeding 4 m;
the construction process of the raise boring machine comprises the following steps:
s1, preparing a drilling machine construction site: starting, and determining that the size of the installation chamber meets the installation requirement;
s2, installing a drilling machine: after the installation construction in the step S1 is finished, constructing an anchor cable of the hoisting and well reversing large drilling machine;
s3, guide hole operation: the method comprises the following steps of (1) utilizing a reverse well large drilling machine to drill a guide hole, supplying high-pressure water before drilling by continuously connecting a drill rod along with the increase of the drilling depth of the guide hole, and continuously drilling the guide hole after the high-pressure water flows out of the hole;
s4, reaming: reaming is carried out after the guide hole is drilled, and the drilling speed is adjusted according to the hardness of the rock stratum;
s5, well casing wall operation: sequentially finishing the wall sleeving operation from top to bottom, after the wall sleeving operation is finished, pouring and plugging the lower opening of the wall sleeving for multiple times by adopting concrete, and after the lower opening of the wall sleeving is poured and plugged, pouring the locking opening;
the integral formwork short-section digging and building process comprises the following steps:
t1, start-up: adopting a raise boring machine to carry out mucking, ventilation and drainage during the construction period of the coal bunker;
t2, construction preparation: before the coal bunker is constructed, a lifting head sheave and a lifting winch are arranged on a roadway top plate;
t3, mounting of a sealing plate: the coal bunker is constructed from top to bottom, after the bin barrel bottom plate is assembled with the blade feet, the templates are sequentially assembled, after the assembly is finished, the sealing plate is poured, the sealing plate is sealed, wherein before the sealing plate is installed, the bin body is constructed by a section of height to meet the requirements of installing the whole metal template, sealing the sealing plate and blasting the safe distance, and the height of the section is generally 6 meters. The bin barrel at the section is integrally cast and formed at one time, and then a sealing disc is installed, a steel wire rope is hung, a bucket is hung, a template winch is debugged, a lifting winch is debugged and the like;
t4, construction of a silo: according to the height of the template, short-digging and short-building the coal bunker from top to bottom, and adopting plain concrete to pour when constructing the bunker barrel section;
t5, construction of a loading chamber: the loading chamber construction comprises expanding by brushing, laying floor layer I-steel, reserving a coal chute and pouring in a vertical mold until the rectangular section floor concrete pouring work is finished;
t6, coal distributor and slope construction: according to the conventional method for constructing the coal distributor and the inclined plane, the construction is carried out on the coal distributor and the inclined plane;
t7, pouring a locking notch: the locking port is communicated with the loading chamber, the coal bunker is constructed to the inclined plane of the lower locking port through the full section to stop wall building, the coal bunker is constructed to the bottom of the bunker by adopting an anchor net spraying method, the hopper on the inclined plane of the coal bunker is uniformly poured after the construction of the loading chamber is finished, and channel steel is embedded in the bunker port to form a 'well' -shaped frame. Specifically, the method comprises the following steps: two 11# mining I-steel bin openings are embedded with two 32b channel steels, the two embedded 32b channel steels form a well-shaped frame, and two 11# mining I-steels are tiled above the frame.
The preparation of the rig construction site in the step S1 further includes installing a slow twisting device, a circulation tank device, and a big reverse rig base.
The arrangement method of the anchor cable of the large well-reversing drilling machine and the large well-reversing drilling machine comprises the following steps:
four points of a hoisting anchor rope A, B, C, D are constructed at the A, B, C, D, E, F, G, H, I, J point of the upper opening of the drilling hole and used for installing a large raise boring machine body, C, D, G, H four points are used for dismantling the large raise boring machine and a base, A, B, E, F four points are used for dismantling a drill bit of the raise boring machine, and G, H, I, J four points are used for loading and unloading the large raise boring machine and the drill bit of the raise boring machine. In the step S3, during the drilling process of the guide hole, the formation condition is determined according to the performance parameters of the returned slag, when the guide hole is drilled into a complete formation, the drilling speed is controlled to be 1m/h, and when the guide hole is drilled into a broken and unstable formation, the drilling speed is controlled to be 0.3 m/h.
In step S4, the drilling rate of the hard rock formation is controlled to be 0.5m/h, and the drilling rate of the soft rock formation is controlled to be 1.0 m/h.
In the step T1, controlling the diameter of the silo of the coal bunker to be 1.2m below 7m and the diameter of the silo above 7m to be 1.8m, and ensuring that the deviation between the center vertical line of the drilling hole and the center vertical line of the coal bunker is not more than 480 mm;
wherein the lifting head sheave of the step T2 includes: the lifting winch comprises 7 parts;
wherein the hoisting winch comprises: the JSDB-19 hoisting winch of part 1 and the JH-8 hoisting winch of part 6 use a steel wire rope of 6 multiplied by 19+ FC-23-1770 rotation resistance steel wire rope.
And in the step T3, when the coal bunker is constructed to 1.8m from top to bottom, the digging and building work is stopped, the assembly mode of the template is sequential assembly from top to bottom, the pouring is stopped after the pouring is started to the sealing plate, the steel beam nest is reserved, the sealing plate is built on the steel beam nest, and the building method of the sealing plate is as follows:
the beam body structure of the sealing disc is built by I-steel, the seal of the sealing disc is sealed by a 60mm wood board to seal the coal bunker, a lifting port, a concrete sliding port and an air duct port are reserved during sealing, a common vent port is reserved on the side edge, an integral template ground rolling frame is installed on the side edge of the coal bunker, and then a safety door is installed.
Wherein, the I-steel selects steel with the upper part of 25b and the lower part of 32 a.
Example 3
A construction method of an underground vertical coal bunker comprises the steps that a reverse-well large-drill construction process is adopted for a small bunker with the size of 2-4m, and an integral template short-section digging and building process is adopted for a large and medium bunker with the size exceeding 4 m;
the construction process of the raise boring machine comprises the following steps:
s1, preparing a drilling machine construction site: starting, namely, after the size of the installation chamber is determined to meet the installation requirement, starting;
s2, installing a drilling machine: after the installation construction in the step S1 is finished, constructing an anchor cable of the hoisting and well reversing large drilling machine;
s3, guide hole operation: the method comprises the following steps of (1) utilizing a reverse well large drilling machine to drill a guide hole, supplying high-pressure water before drilling by continuously connecting a drill rod along with the increase of the drilling depth of the guide hole, and continuously drilling the guide hole after the high-pressure water flows out of the hole;
s4, reaming: reaming is carried out after the guide hole is drilled, and the drilling speed is adjusted according to the hardness of the rock stratum;
s5, well casing wall operation: sequentially finishing the wall sleeving operation from top to bottom, after the wall sleeving operation is finished, pouring and plugging the lower opening of the wall sleeving for multiple times by adopting concrete, and after the lower opening of the wall sleeving is poured and plugged, pouring the locking opening;
the integral formwork short-section digging and building process comprises the following steps:
t1, start-up: adopting a raise boring machine to carry out mucking, ventilation and drainage during the construction period of the coal bunker;
t2, construction preparation: before the coal bunker is constructed, a lifting head sheave and a lifting winch are arranged on a roadway top plate;
t3, mounting of a sealing plate: the coal bunker is constructed from top to bottom, after the bin barrel bottom plate is assembled with the blade feet, the templates are sequentially assembled, after the assembly is finished, the sealing plate is poured, the sealing plate is sealed, wherein before the sealing plate is installed, the bin body is constructed by a section of height to meet the requirements of installing the whole metal template, sealing the sealing plate and blasting the safe distance, and the height of the section is generally 6 meters. The bin barrel at the section is integrally cast and formed at one time, and then a sealing disc is installed, a steel wire rope is hung, a bucket is hung, a template winch is debugged, a lifting winch is debugged and the like;
t4, construction of a silo: according to the height of the template, short-digging and short-building the coal bunker from top to bottom, and adopting plain concrete to pour when constructing the bunker barrel section;
t5, construction of a loading chamber: the loading chamber construction comprises expanding by brushing, laying floor layer I-steel, reserving a coal chute and pouring in a vertical mold until the rectangular section floor concrete pouring work is finished;
t6, coal distributor and slope construction: according to the conventional method for constructing the coal distributor and the inclined plane, the construction is carried out on the coal distributor and the inclined plane;
t7, pouring a locking notch: the locking port is communicated with the loading chamber, the coal bunker is constructed to the inclined plane of the lower locking port through the full section to stop wall building, the coal bunker is constructed to the bottom of the bunker by adopting an anchor net spraying method, the hopper on the inclined plane of the coal bunker is uniformly poured after the construction of the loading chamber is finished, and channel steel is embedded in the bunker port to form a 'well' -shaped frame. Specifically, the method comprises the following steps: two 11# mining I-steel bin openings are embedded with two 32b channel steels, the two embedded 32b channel steels form a well-shaped frame, and two 11# mining I-steels are tiled above the frame.
The preparation of the rig construction site in the step S1 further includes installing a slow twisting device, a circulation tank device, and a big reverse rig base.
The arrangement method of the anchor cable of the large well-reversing drilling machine and the large well-reversing drilling machine comprises the following steps:
four points of a hoisting anchor rope A, B, C, D are constructed at the A, B, C, D, E, F, G, H, I, J point of the upper opening of the drilling hole and used for installing a large raise boring machine body, C, D, G, H four points are used for dismantling the large raise boring machine and a base, A, B, E, F four points are used for dismantling a drill bit of the raise boring machine, and G, H, I, J four points are used for loading and unloading the large raise boring machine and the drill bit of the raise boring machine. Specifically, the size of the installation chamber needs to be determined before the raise boring machine is installed, and the installation requirement is met.
In the step S3, during the drilling process of the pilot hole, the formation condition is determined according to the return slag performance parameters, when the pilot hole is drilled into a complete formation, the drilling speed is controlled to be 1.5m/h, and when the pilot hole is drilled into a broken and unstable formation, the drilling speed is controlled to be 0.7 m/h.
In step S4, the drilling rate of the hard rock formation is controlled to be 0.6m/h, and the drilling rate of the soft rock formation is controlled to be 1.5 m/h.
In the step T1, controlling the diameter of the silo of the coal bunker to be 1.3m below 7m and the diameter of the silo above 7m to be 1.8m, and ensuring that the deviation between the center vertical line of the drilling hole and the center vertical line of the coal bunker is not more than 490 mm;
wherein the lifting head sheave of the step T2 includes: the lifting winch comprises 7 parts.
Wherein the hoisting winch comprises: the JSDB-19 hoisting winch of part 1 and the JH-8 hoisting winch of part 6 use a steel wire rope of 6 multiplied by 19+ FC-23-1770 rotation resistance steel wire rope.
And in the step T3, when the coal bunker is constructed to 1.8m from top to bottom, the digging and building work is stopped, the assembly mode of the template is sequential assembly from top to bottom, the pouring is stopped after the pouring is started to the sealing plate, the steel beam nest is reserved, the sealing plate is built on the steel beam nest, and the building method of the sealing plate is as follows:
the beam body structure of the sealing disc is built by I-steel, the seal of the sealing disc is sealed by a 65mm wood board to seal the coal bunker, a lifting port, a concrete sliding port and an air duct port are reserved during sealing, a common vent port is reserved on the side edge, an integral template ground rolling frame is installed on the side edge of the coal bunker, and then a safety door is installed.
Wherein, the I-steel selects steel with the upper part of 25b and the lower part of 32 a.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A construction method of an underground vertical coal bunker is characterized by comprising the steps that a reverse-well large-drill construction process is selected for a small bunker with the size of 2-4m, and an integral template short-section digging and building process is selected for a large and medium bunker with the size exceeding 4 m;
the construction process of the raise boring machine comprises the following steps:
s1, preparing a drilling machine construction site: determining that the size of the installation chamber meets the installation requirement;
s2, installing a drilling machine: after the installation construction in the step S1 is finished, constructing a stable and lifting anchor cable for lifting and reversing the large drilling machine;
s3, guide hole operation: the method comprises the following steps of (1) utilizing a reverse well large drilling machine to drill a guide hole, supplying high-pressure water before drilling by continuously connecting a drill rod along with the increase of the drilling depth of the guide hole, and continuously drilling the guide hole after the high-pressure water flows out of the hole;
s4, reaming: reaming is carried out after the guide hole is drilled, the drilling speed is adjusted according to the hardness of the rock stratum, the diameter of the bin body is not more than 4m, and the reaming is carried out in place at one time;
s5, well casing wall operation: the well casing wall operation adopts one of the following two modes:
1. pouring sprayed concrete, namely performing sprayed concrete supporting operation from top to bottom by utilizing an up-down self-stabilizing hanging scaffold; 2. the method comprises the following steps of (1) adopting a steel sleeve retaining wall, pouring and filling pouring concrete between a sleeve and a well wall, after the wall sleeving operation is finished, pouring and plugging concrete at a lower opening of the wall sleeving for multiple times, and after the lower opening of the wall sleeving is poured and plugged, pouring a locking opening;
the integral formwork short-section digging and building process comprises the following steps:
t1, start-up: adopting a raise boring machine to carry out mucking, ventilation and drainage during the construction period of the coal bunker;
t2, construction preparation: before the coal bunker is constructed, a lifting head sheave and a lifting winch are arranged on a roadway top plate;
t3, mounting of a sealing plate: constructing the coal bunker from top to bottom, assembling the templates in sequence after assembling the blade feet on the bottom plate of the bunker barrel, pouring the coal bunker to the sealing plate after the assembly is finished, and sealing the sealing plate;
t4, construction of a silo: according to the height of the template, short digging and building of the coal bunker from top to bottom, pouring into a well along with digging, and pouring plain concrete when constructing to a bunker barrel section;
t5, construction of a loading chamber: the loading chamber construction comprises expanding by brushing, laying floor layer I-steel, reserving a coal chute and pouring in a vertical mold until the rectangular section floor concrete pouring work is finished;
t6, coal distributor and slope construction: according to the conventional method for constructing the coal distributor and the inclined plane, the construction is carried out on the coal distributor and the inclined plane;
t7, pouring a locking notch: the locking port is communicated with the loading chamber, the coal bunker is constructed to the inclined plane of the lower locking port through the full section to stop wall building, the coal bunker is constructed to the bottom of the bunker by adopting an anchor net spraying method, the hopper on the inclined plane of the coal bunker is uniformly poured after the construction of the loading chamber is finished, and channel steel is embedded in the bunker port to form a 'well' -shaped frame.
2. The method of claim 1, wherein the rig site preparation in step S1 further comprises installing a slow-cutter device, a circulation tank device, and a rig substructure of a raise boring machine.
3. The construction method of the underground vertical coal bunker of claim 1, wherein the anchor cable of the large well-reversing drilling machine and the large well-reversing drilling machine are arranged as follows:
hoisting anchor cables are constructed at the A, B, C, D, E, F, G, H, I, J point of the upper opening of the drilling hole, A, B, C, D four points are used for installing a large raise boring machine body, C, D, G, H four points are used for dismantling the large raise boring machine and a base, A, B, E, F four points are used for dismantling a drill bit of the raise boring machine, and G, H, I, J four points are used for loading and unloading the large raise boring machine and the drill bit of the raise boring machine.
4. The construction method of the underground vertical coal bunker of claim 1, wherein in the step S3, during the drilling process of the guide hole, the condition of the ground layer is judged according to the performance parameters of the returned slag, when the guide hole is drilled into the complete ground layer, the drilling speed is controlled to be 1-1.8m/h, and when the guide hole is drilled into the broken and unstable ground layer, the drilling speed is controlled to be 0.3-1 m/h.
5. The construction method of the underground vertical coal bunker of claim 1, wherein in the step S4, the drilling speed of the hard rock stratum is controlled to be 0.5-1.0 m/h, and the drilling speed of the soft rock stratum is controlled to be 1.0-2.0 m/h.
6. The construction method of the underground vertical coal bunker of claim 1, wherein the diameter of the bunker barrel of the coal bunker in the step T1 is controlled to be 1.2-1.4m below 7m and 1.8m above 7m, so as to ensure that the deviation between the center vertical line of the drilling hole and the center vertical line of the coal bunker is not more than 480-500 mm.
7. The method for constructing the underground vertical coal bunker of claim 1, wherein the lifting head sheave of the step T2 includes: the lifting winch comprises 7 parts.
8. The method of constructing a downhole vertical coal bunker as claimed in claim 7, wherein said hoisting winch includes: the JSDB-19 hoisting winch of part 1 and the JH-8 hoisting winch of part 6 use a steel wire rope of 6 multiplied by 19+ FC-23-1770 rotation resistance steel wire rope.
9. The construction method of the underground vertical coal bunker of claim 1, wherein in the step T3, when the coal bunker is constructed from top to bottom to 1.8m, the digging and building work is stopped, the assembly mode of the templates is sequential assembly from top to bottom, after the assembly is finished, pouring is stopped after pouring is started to the sealing plate, a steel beam nest is reserved, and the sealing plate is built on the steel beam nest, wherein the building method of the sealing plate is as follows:
the beam body structure of the sealing disc is built by I-steel, the sealing of the sealing disc is sealed by a 60-70mm wood board to seal the coal bunker, a lifting port, a concrete sliding port and an air duct port are reserved during sealing, a common vent port is reserved on the side edge, an integral template ground rolling frame is arranged on the side edge of the coal bunker, and then a safety door is arranged.
10. The method of claim 9, wherein the i-beam is a 25 b-sized steel material with a 32 a-sized upper portion and a lower portion.
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