CN108005654B - Construction process for overhead mining large-mining-height working face old roadway passing - Google Patents
Construction process for overhead mining large-mining-height working face old roadway passing Download PDFInfo
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- CN108005654B CN108005654B CN201711205157.8A CN201711205157A CN108005654B CN 108005654 B CN108005654 B CN 108005654B CN 201711205157 A CN201711205157 A CN 201711205157A CN 108005654 B CN108005654 B CN 108005654B
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- 238000005065 mining Methods 0.000 title claims abstract description 36
- 238000010276 construction Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000008569 process Effects 0.000 title claims abstract description 15
- 239000003245 coal Substances 0.000 claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims description 35
- 239000010959 steel Substances 0.000 claims description 35
- 239000002023 wood Substances 0.000 claims description 26
- 238000005553 drilling Methods 0.000 claims description 16
- 239000000178 monomer Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 230000003014 reinforcing effect Effects 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
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- Engineering & Computer Science (AREA)
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- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
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- Environmental & Geological Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention belongs to the technical field of coal mining, and particularly relates to a construction process for an overhead mining large-mining-height working face passing through an old roadway, wherein a working face additionally supports a roof of the old roadway before reaching the old roadway; when the working face reaches the old lane, the hydraulic support is firstly utilized to support the main old lane top plate, and then the additional supporting structure is gradually removed, so that the fully mechanized mining equipment is smoothly pushed forward. The invention adopts different pertinence measures for different types of old roadways, so that the working face successfully finishes the stoping, the service life of the mine is prolonged, the coal resources are recycled to the maximum extent, and great economic benefits are created.
Description
Technical Field
The invention belongs to the technical field of coal mining, and particularly relates to a construction process for an overhead mining large-mining-height working face old roadway.
Background
In the process of coal mining, the situation that an old roadway and a coal seam are crossed or even the old roadway is completely positioned in the coal seam is often encountered, and how to enable fully-mechanized mining equipment to smoothly pass through the old roadway is a great difficulty of a mining process for mining of the coal seam. Old roadways in coal seams can be mainly classified into six categories as shown in the following table:
the working face passes through a dense old roadway continuously, a top plate, a support and gas are managed with considerable difficulty, and especially, for a high-altitude working face (the high-altitude working face refers to a working face with a large thickness of a coal layer mined by a fully-mechanized mining device at one time), the support, a coal machine and a working face chain plate machine are managed with certain difficulty.
Disclosure of Invention
The invention aims to provide a construction process for a working face of a large mining height to pass through an old roadway of a coal seam, which can enable the working face to smoothly pass through the old roadway.
In order to achieve the purpose, the invention provides the following technical scheme: a working face of a large mining height for upward mining passes through an old roadway construction process, wherein before the working face reaches the old roadway, an old roadway top plate is additionally supported; when the working face reaches the old lane, the hydraulic support is firstly utilized to support the main old lane top plate, and then the additional supporting structure is gradually removed, so that the fully mechanized mining equipment is smoothly pushed forward.
When the old lane is an anchor net supporting lane and all lanes are located in a working face plane, performing bottom cleaning on the old lane from outside to inside before stoping, drilling two monomers on each channel steel at the top for reinforcing support, then recovering iron devices such as rails, pipelines and the like in the old lane, cleaning waste sundries out, and withdrawing the monomers in the old lane from inside to outside; and (5) slowly reducing the mining height until the working face is stoped to about 5m before the old roadway until the roof of the old roadway is held for stoping.
When the old roadway is a U-shaped shed supporting roadway which is perpendicular to the working face and parallel to the crossheading, the shed is changed on the belt conveyor before stoping, shed legs influencing stoping are returned, round timbers are used for carrying out roof connection, the round timbers are dragged by the support during stoping of the working face, and monomers for roof connection are recovered when stoping is carried out to the present.
When the old lane is an anchor net support and is a high-position drilling site obliquely crossed with the plane of a working face, a stoping method is characterized in that a road plate is used for installing connected wood stacks in a drilling site platform and an inclined lane of the drilling site, the wood stacks are connected with a solid top plate, the wood stacks at the inner opening are installed to be tightly attached to the coal wall of the drilling site platform, the two wood stacks are connected tightly to form an integral support, the wood stacks below the inclined lane are supported below the inclined lane in an inclined mode by at least 2 mining I-shaped steel beams, the hollow top is connected firmly by the road plate or wood, the I-shaped steel supports two I-shaped steels supporting the wood stacks by 1 mining I-shaped steel beam, and three monomers are arranged below the I-shaped; when the working face is mined to a drilling site, the telescopic beams of the hydraulic supports are adopted to feed the lower parts of the wood piles or the I-shaped steel beams, so that the single bodies below the I-shaped steel beams can be gradually withdrawn, and then the telescopic beams gradually support the whole I-shaped steel beams along with the propulsion of the working face until the working face smoothly passes through the drilling site.
When the old roadway is a U-shaped shed support and the roadway is a rail-slab connection roadway which is basically compacted, the old roadway is subjected to bottom-lying cleaning from outside before stoping, and each U-shaped shed is provided with a single body for reinforcing support; construction channel-section steel adds the anchor rope and strengthens strutting between per two U type sheds after the tunnel arrangement, strengthen strutting the construction after finishing, fall off the canopy checkpost screw cap of U type canopy, because this old lane is main business turn over of material of working face allies oneself with the lane, in order to guarantee safety, the canopy leg does not remove with U type canopy checkpost, when the working face is adopted to old lane back, personnel get into the coal wall and take off outside U type canopy leg, along with the propulsion support back timber of working face holds the U type canopy top, then take off the U type canopy leg of inboard, the normal recovery of working face.
When the old lane is a U-shaped shed support and a crossheading coal outlet inclined lane obliquely crossed with a working face plane, the inclined lane is lapped with a conjoined wood buttress top-meeting support inclined lane from a coal seam bottom plate for 20m downwards before stoping, wherein a closed wall is arranged from the coal seam bottom plate for 5m downwards, coal gangue is filled between the closed wall and the lapped wood buttress of the coal seam bottom plate, I-shaped steel for mining is padded above the coal seam bottom plate and used as a bottom beam to support a bracket, the bracket is prevented from being tilted, two sides of the I-shaped steel are not less than 200mm on an entity, two rows of I-shaped steel are in one group, the distance between each group is 200mm, and the two ends and the middle are bound by 8 # iron wires; when the working face is stoped to the roadway, the exposed U-shaped shed is taken off one by one, stoping is carried out according to the position of the coal seam, and the support is ridden on the I-shaped steel when the empty section is climbed.
When the old roadway is supported by a U-shaped shed and other goaf tracks and transportation roads of the roadway are basically compacted, the mining direction of the working face is adjusted, the area of the old roadway exposed at one time on the working face is reduced, and roof leakage is prevented; manually unloading the shed legs after the shed legs of the lower-side shed are exposed, supporting the U-shaped shed beams by the supports to carry out mining forwards, and then dismantling the shed legs of the upper-side U-shaped shed; and adjusting the stoping layer position according to the lithology of the top plate and the position of the old lane, and breaking 1m of mudstone top plate and stoping the sandstone top plate in the track passing sequence.
The invention has the technical effects that: the invention adopts different pertinence measures for different types of old roadways, so that the working face successfully finishes the stoping, the service life of the mine is prolonged, the coal resources are recycled to the maximum extent, and great economic benefits are created.
Drawings
FIG. 1 is a plan view of a roadway layout provided by one embodiment of the present invention;
FIG. 2 is a section view of 2331(3) of FIG. 1 taken along the inclined coal roadway;
FIG. 3 is a cross-sectional view of 2341(3) upper airway number 10 drill site of FIG. 1;
FIG. 4 is a plan view of the goaf track and run distribution;
FIG. 5 is a schematic view of a class II roadway support;
FIG. 6 is a schematic view of a class III roadway support;
FIG. 7 is a schematic view of a class IV roadway support;
fig. 8 is a schematic diagram of a v-type roadway support.
Detailed Description
The present invention is described in detail below with reference to the attached drawings.
The construction process of the I-type old lane comprises the following steps: before stoping, the old lane is cleaned from outside to bottom, two DZ22 monomers are punched on each channel steel for reinforcing support, then iron devices such as rails and pipelines in the old lane are recovered, waste sundries are cleaned out, and the monomers in the old lane are withdrawn from inside to outside. And the working face is stoped to about 5m before the first-class old roadway, the mining height is slowly reduced until the roof of the old roadway is supported for stoping, and the old roadway is a supporting roadway of an anchor net, so that the cleaning is thorough, and the stoping is smooth.
As shown in fig. 5, the construction process of the class i old lane is as follows: before stoping, the canopy is changed to the mountain of belt feeder, returns the canopy leg that influences the stoping, utilizes log 3 to connect the roof, and the support drags log stoping during working face stoping, supports roof beam 1 and railway timber 2, and the monomer that connects the roof is retrieved when stoping to present.
As shown in fig. 6, the construction process of the class i old lane is as follows: the specification of a drilling site is as follows: length × width (flat pitch): 8.3 m.times.2.6 m; a hammer head part: length × width (flat pitch): 5.5 m.times.4.5 m; the inclined drift part is constructed at the position of 30 degrees on the hill, the tops of the walls are supported by anchor beams and nets, and the row spacing is 0.8 m. And the recovery uses a road plate with the diameter of 20cm multiplied by 1.6m to install connected wood piles in the platform of the drill site and the inclined roadway of the drill site. The wood stacks are connected with a solid top plate, the wood stacks at the inner openings are arranged close to the coal wall of the platform, and the two wood stacks are connected tightly to form an integral support. The timber pile below the inclined drift is supported below the inclined drift by using not less than 2 mining 11# steel I-beams with the length of 4.5 meters, the empty top is connected and compacted by using a road plate or wood, 1 mining 11# steel I-beam 4 with the length of 4.5 meters is used for supporting two steel I-beams for supporting the timber pile, and three monomers are arranged below the steel I-beams, as shown in the following figure. When the working face is mined to a drilling site, the telescopic beam is used for feeding the lower part of the wood pile or the I-shaped steel beam, the single body below the I-shaped steel beam can be gradually withdrawn, and then the telescopic beam gradually supports the whole I-shaped steel beam along with the propulsion of the working face until the working face smoothly passes through the drilling site.
As shown in fig. 7, the construction process of the class i old lane is as follows: the first tunnel of the rail cover is compacted, the old tunnel is cleaned from outside to bottom before stoping, and each U-shaped shed is provided with a DZ22 monomer for reinforcing support. After the tunnel is finished, channel steel 6 and anchor cables 5 are constructed between every two U-shaped sheds for reinforcing support, the construction schematic diagram is as follows, after the reinforcing support construction is finished, shed clips 7 of the U-shaped sheds are removed, and as the old tunnel is used as a main material in-and-out tunnel of a working face, legs of a safety shed and the U-shaped shed clips 7 are not removed. When the working face is recovered to an old roadway, a person enters the coal wall to take off the U-shaped shed clips 7 on the outer side, the top beams of the supports support the U-shaped shed top along with the pushing of the working face, then the U-shaped shed legs on the inner side are taken off, and the working face is normally recovered.
As shown in fig. 8, the construction process of the class i old lane is as follows: before stoping, the inclined roadway is supported by lapping the connected wood piles 20m downwards from the 13-slot coal seam floor 9, wherein a closed wall 11 is arranged 5m downwards from the 13-slot coal seam floor 9, coal gangue 10 is filled in the middle of the lapped wood piles from the closed wall 11 to the 13-slot coal seam floor 9, a 4.5 m-padded 11# I-steel 8 for mining is adopted above the 13-slot coal seam floor 9 to serve as a bottom beam to support a support, the inclined rack falling is prevented, two sides of the I-steel 8 are not less than 200mm in entity, two rows of I-steel 8 are in one group, the distance between each group of I-steel 8 is 200mm, and two ends and the middle of the I-steel are bound by 8 # iron wires. When the working face is stoped to the roadway, the exposed U-shaped shed is taken off one by one, stoping is carried out according to the position of the coal seam, and the support is ridden on the I-shaped steel 8 when the empty section is climbed.
The construction process of the I-type old lane comprises the following steps: the old tunnel and the working face are on the same layer and mainly comprise rails and smooth transportation of U-shaped shed supports of all mined sections, and the old tunnel cannot be cleaned after being basically compacted, so that the old tunnel is a main factor for restricting production. The main method adopted by the old lane is to adjust the mining direction of the working face, reduce the area of the old lane exposed at one time on the working face and prevent top leakage. Manually unloading the shed legs after the shed legs of the lower side walls are exposed, supporting the U-shaped shed beams by the supports, extracting forwards, and then removing the shed legs of the upper side walls. And adjusting the stoping horizon according to the lithology of the roof and the position of the old lane, and breaking a mudstone roof with a length of about 1m and performing stoping with the sandstone roof in the same time on tracks (bottom areas) 2311 and 3. 2311(3) (bottom area) is floated on the bottom plate of the lower part of the working surface along the rail, and has almost no influence on the production.
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 (1)
1. A construction process for an overhead mining large-mining-height working face old roadway is characterized by comprising the following steps: before the working face reaches the old lane, additionally supporting the top plate of the old lane; when the working face reaches the old roadway, firstly, a hydraulic support is used for supporting a top plate of the old roadway, and then the additional supporting structure is gradually removed, so that the fully mechanized mining equipment is smoothly pushed forward;
the old lane is an anchor net support and a high-position drilling site obliquely crossed with a working face plane, a road plate is used for installing a connected wood pile in a drilling site platform and a drilling site oblique lane during stoping, the connected wood pile is connected with a top plate of the old lane, an inner opening wood pile of the connected wood pile is required to be installed to be tightly attached to a coal wall of the drilling site platform, the connected wood pile is required to be connected and tightly supported to form an integral support, the connected wood pile below the oblique lane is required to be obliquely supported below not less than 2 mining I-shaped steel beams, a hollow top is connected with the road plate or wood material, 1 mining I-shaped steel beam is used for supporting not less than 2 mining I-shaped steel beams, and three monomers are drilled below the 1 mining I-shaped steel beam; when the working face is mined to a drilling site, the telescopic beam of the hydraulic support is adopted to feed the lower part of the connected wood pile or the mining I-shaped steel beam, so that the single body below the mining I-shaped steel beam can be gradually withdrawn, and then the telescopic beam gradually supports the whole mining I-shaped steel beam along with the propulsion of the working face until the working face smoothly passes through the drilling site.
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| CN201711205157.8A CN108005654B (en) | 2017-11-27 | 2017-11-27 | Construction process for overhead mining large-mining-height working face old roadway passing |
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| CN201711205157.8A CN108005654B (en) | 2017-11-27 | 2017-11-27 | Construction process for overhead mining large-mining-height working face old roadway passing |
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| CN108005654B true CN108005654B (en) | 2020-04-28 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109098713B (en) * | 2018-08-29 | 2020-06-23 | 国家能源投资集团有限责任公司 | Method for passing through empty lane |
| CN109339831A (en) * | 2018-09-28 | 2019-02-15 | 淮南矿业(集团)有限责任公司 | A kind of crossheading big cross section freeboard section connects top method and connects top |
| CN110424992A (en) * | 2019-08-08 | 2019-11-08 | 四川川煤华荣能源股份有限公司 | The method in the lane Inclined Full-mechanized Mining Face Guo Jiu |
| CN111236941B (en) * | 2020-02-19 | 2021-09-17 | 兖州煤业股份有限公司 | Method for fully mechanized mining face to pass through cross-layer roadway |
| CN112127912A (en) * | 2020-09-22 | 2020-12-25 | 九州职业技术学院 | Waste coal mine tunnel reinforcing method |
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| CN105587319A (en) * | 2016-01-11 | 2016-05-18 | 淮南矿业(集团)有限责任公司 | Large-mining-height fully mechanized coal working face fast top rock breaking crossing fault method |
| CN106481346A (en) * | 2016-12-16 | 2017-03-08 | 中国神华能源股份有限公司 | A kind of fully-mechanized mining working back production is by the method in empty lane |
| CN206636603U (en) * | 2017-04-07 | 2017-11-14 | 兖州煤业股份有限公司 | Face sky old working compound closure wall |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105587319A (en) * | 2016-01-11 | 2016-05-18 | 淮南矿业(集团)有限责任公司 | Large-mining-height fully mechanized coal working face fast top rock breaking crossing fault method |
| CN106481346A (en) * | 2016-12-16 | 2017-03-08 | 中国神华能源股份有限公司 | A kind of fully-mechanized mining working back production is by the method in empty lane |
| CN206636603U (en) * | 2017-04-07 | 2017-11-14 | 兖州煤业股份有限公司 | Face sky old working compound closure wall |
Non-Patent Citations (1)
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| 悬移支架放顶煤工作面过老巷的技术与实践;齐高军;《山东煤炭科技》;20061030(第5期);第22-23页 * |
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