CN111764900A - Construction method for pushing and mining working face through vertical intersection point of connecting roadway by 110 construction method - Google Patents
Construction method for pushing and mining working face through vertical intersection point of connecting roadway by 110 construction method Download PDFInfo
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- CN111764900A CN111764900A CN202010585767.0A CN202010585767A CN111764900A CN 111764900 A CN111764900 A CN 111764900A CN 202010585767 A CN202010585767 A CN 202010585767A CN 111764900 A CN111764900 A CN 111764900A
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- 238000005065 mining Methods 0.000 title claims abstract description 34
- 238000010276 construction Methods 0.000 title claims abstract description 32
- 239000002023 wood Substances 0.000 claims abstract description 23
- 239000003245 coal Substances 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 239000011435 rock Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract 1
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000005641 tunneling 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/02—Non-telescopic props
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
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- Mining & Mineral Resources (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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Abstract
The invention provides a construction method for pushing and mining a working face through a vertical intersection point of an interconnecting roadway by a 110 construction method, and relates to the technical field of coal mining. The method comprises the following steps: A. before the working face is pushed to a position less than 150m away from the upper connecting lane, arranging constant-resistance anchor cables in the lower connecting lane at the interchange point and matching with a channel steel supporting top plate and two sides; B. paving rails in the upper connecting lane, connecting and fixing the rails through anchor rods, connecting the rails and anchor cables through chains, and driving wood piles in the upper connecting lane at the intersection positions; C. a plurality of wood piles are arranged in the range of 20m of the interchange point along the descending direction of the upper roadway; D. when the working face is pushed to a position 2m away from the vertical intersection point, the working face adopts a large-proportion mining tail for mining, and the working face quickly passes through the vertical intersection point. The method can complete the reinforced support of the top plate and two sides of the intersection position of the working face and the maintenance of the false roof, effectively avoid the roof falling caused by the ultrahigh tunnel, and realize high-efficiency mining under the condition of not influencing the production of the working face.
Description
Technical Field
The invention relates to the technical field of coal mining, in particular to a construction method for pushing and mining a vertical intersection point of a connecting roadway on a working face in a 110 construction method.
Background
In the 110 construction method in coal mining, namely '1 working face, 1 roadway and 0 coal pillar', a basic top of an overlying rock stratum can be pulled through a constant-resistance anchor cable, a roof is cut to form a crack when an energy-gathered blasting device pre-cracks the roof, the roof is cut along the crack when the roof is pre-cracked when a stope is pressed periodically, and the roadway behind the roadway is automatically formed. The interchange roadway arrangement is a common method for mine roadway tunneling, and in the coal mining process, a crossheading roadway and a connection roadway are in lap joint, wherein the crossheading roadway is generally arranged at the lower layer, and the connection roadway is arranged at the lower layer. In the working face extraction, the working face needs to pass through the vertical intersection point of the connecting roadway, top rocks which appear when the working face is pushed to the position drop to cause a support empty roof to cause roof collapse accidents, particularly, the working face is pushed to the position to pass through the interchange point in the 110 construction method, and the roof collapse is caused due to the fact that the roadway is ultrahigh, so that the construction method that the working face is pushed to pass through the vertical intersection point of the connecting roadway in the 110 construction method needs to be further improved.
Disclosure of Invention
The invention provides a construction method for a 110 construction method that a working face passes through an intersection point of connecting roadways in a pushing mode, and the construction method is used for solving the problem that a top plate falls off due to the fact that roadways are ultrahigh when the working face passes through the intersection point position in the pushing mode and achieving efficient stoping of the 110 construction method.
A construction method for pushing and mining a working face through a vertical intersection point of an interconnecting roadway by a 110-method is characterized by comprising the following steps:
step A, the working face is pushed to a position less than 150m away from an upper connecting lane, and constant-resistance anchor cables are arranged in a lower connecting lane at an interchange point and matched with a channel steel support top plate and two sides;
b, paving rails in the upper connecting roadway, connecting and fixing the rails through anchor rods, connecting the rails and anchor cables through chains, and arranging wood piles in the upper connecting roadway at the positions of the cross points;
c, arranging a plurality of wood piles within a range of 20m from the vertical intersection point along the descending direction of the upper roadway;
and D, when the coal face is pushed to a position 2m away from the vertical intersection point, the large-proportion mining machine tail is adopted for mining on the face, and the face passes through the vertical intersection point of the connecting roadway.
Preferably, the constant-resistance anchor cable penetrates through a top plate of the lower connecting lane, the upper connecting lane and a direct top of the upper connecting lane, and the height of the constant-resistance anchor cable penetrating through the direct top of the upper connecting lane is more than 3.5 m.
Preferably, the wood cribs are arranged in a groined shape by using square wood, and each wood crib is connected with the top and penetrates through the top.
Preferably, the single hydraulic prop and the stacking hydraulic prop are respectively installed on two sides in the lower roadway, and the lower roadway is supported by the combination of an anchor rod, an anchor cable and an anchor net.
Preferably, single hydraulic supports and stack hydraulic supports are used for supporting in the lower roadway within the range of 20m ahead of the working face, the stack hydraulic supports are used for supporting in the roadway close to one side of the mining working face, and the single hydraulic supports are used for supporting in the roadway on the other side.
It is further preferred that the individual hydraulic props and the hydraulic props of the stack are cleaned to a solid bottom before installation, and that a spacer is installed under the legs when the bottom is soft coal.
It is further preferred that when the working face is pushed to pass through the overpass roadway, the tail is pushed to pass through the intersection point of the connecting roadway in an inclined manner.
The construction method for pushing and mining the vertical intersection point of the connecting roadway on the working face in the 110 construction method has the advantages that: the method strengthens and supports the top plate and two sides of the connecting roadway at the position of the interchange point of the advanced working face and manufactures the false roof, thereby ensuring the smooth pushing and mining of the working face; the working face is inclined to pass through the roadway by the large-proportion mining-adjusting machine tail pushing mining, so that the rapid stoping is realized on the premise of not influencing production; in addition, the method also has the advantages of safety, high-efficiency mining and the like.
Drawings
FIG. 1 is a schematic plan view of an interchange roadway;
FIG. 2 is a schematic cross-sectional structure of a cross-point roadway;
FIG. 3 is a schematic plan view of a face being extracted through an intersection;
in the figure: 1-upper connecting lane, 2-lower connecting lane, 3-connecting lane, 4-wood buttress, 5-coal bed, 6-channel steel, 7-constant-resistance anchor cable, 8-single hydraulic prop, 9-buttress hydraulic prop and 10-goaf.
Detailed Description
A concrete embodiment of a construction method for pushing a working face of a 110 construction method to pass through a vertical intersection of connecting roadways according to the present invention will be described with reference to fig. 1 to 3.
The method is explained by combining a 4306 working face of a certain mine using a 110 construction method, and as the 4306 working face adopts an inclined long arm arrangement, the working face transversely cuts the 4301, 4302 and 4303 working faces to form a crosscut when stoping, wherein the crosscut relationship exists with the 4301 rubber belt lane. The thickness of rock layers of the upper and lower roadways at the position of the interchange point is 3.6m through the calculation of the known roadway elevation, the self height of the roadway is 3.4m, and the fall of a top plate at the interchange point is 7 m; the thickness of the coal seam is 2.7m, the top plate is fine sandstone, and the bottom plate is mudstone.
A construction method for pushing and mining a working face through a vertical intersection point of an interconnecting roadway by adopting a 110-method comprises the following specific steps:
and step A, the coal face is pushed to a position less than 150m away from the upper connecting lane, and constant-resistance anchor cables are arranged in the lower connecting lane at the interchange point and matched with a channel steel support top plate and two sides. The anchor rod is made of deformed steel, the diameter phi of the anchor rod is 20mm, the length of the anchor rod is 2.4m, and the row spacing between the anchor rods is 800 multiplied by 800 mm.
The constant-resistance anchor cable penetrates through a top plate of the lower connecting lane, the upper connecting lane and a direct top of the upper connecting lane, and the height of the constant-resistance anchor cable penetrating through the direct top of the upper connecting lane is larger than 3.5 m. The length of the constant-resistance anchor cables in the embodiment is 10.5m, and the constant-resistance anchor cables are supported through the matching of channel steel, so that the supporting strength and effectiveness are further ensured.
And B, paving tracks in the upper connecting roadway, connecting and fixing the tracks through anchor rods, connecting the tracks and the anchor cables through chains, and arranging wood piles in the upper connecting roadway at the positions of the cross points.
The track can use the discarded track wherein, uses 40T's chain to fix track and constant resistance anchor rope, uses the stock fixed between the track to be whole, prevents that the stack from dropping. The wood cribs are arranged in a groined shape by using square wood, and each wood crib is connected with the top and penetrates through the top. The wood crib is connected to a roadway top plate and is connected with the roadway top, two layers of half-reason wood are used for connecting the wood crib at intervals between the two wood cribs, and double layers of metal rhombic nets can be laid above the wood cribs.
And C, driving a plurality of wood piles within a range of 20m from the vertical intersection point along the descending direction of the upper roadway to form the artificial roof.
And a single hydraulic prop and a stack hydraulic prop are respectively arranged on two sides in the lower roadway, and the lower roadway is supported by combining an anchor rod, an anchor cable and an anchor net. In the lower roadway, a single hydraulic prop and a stack hydraulic prop are used for supporting within the range of 20m ahead of a working face, the stack hydraulic prop is used for supporting in the roadway close to one side of the mining working face, the single hydraulic prop is used for supporting on the other side of the roadway, the distance between the single hydraulic props and the roadway wall is 500mm, and the distance between the single hydraulic props is 500 mm; the multi-type hydraulic prop can strongly support the top plate when the top is cut by the 110-method. The single hydraulic prop and the stack hydraulic prop clean the bottom plate to the solid bottom before installation, and when the bottom plate is soft coal rock, cushion blocks are arranged below the prop legs.
And D, when the coal face is pushed to a position 2m away from the vertical intersection point, the large-proportion mining machine tail is adopted for mining on the face, and the face passes through the vertical intersection point of the connecting roadway.
When the working face is pushed to pass through the overpass roadway, the tail of the machine is quickly pushed to mine, and the working face is inclined to pass through the vertical intersection point of the connecting roadway, so that large-area top plates are prevented from caving. Before the working face passes through the interchange point, the overhaul class strengthens the overhaul quality, and particularly, a machine tail chain wheel, an antifriction plate, a gear box and the like ensure the continuous and normal operation of working face equipment so as to accelerate the propelling speed and strive for the mining as soon as possible.
According to the method, construction is carried out on a working face 4306, the construction sequence is adopted for the interchange position of the first connecting lane of the working face in advance, a top plate and two sides of the interchange position of the working face are smoothly supported and maintained, a solid foundation is laid for smooth pushing and mining of the working face, the mining tail is adjusted in a large proportion when the working face is pushed and mined to the position, the working face is smoothly pushed and mined to the interchange position by using 2 days without influencing production, the pushing and mining of the working face are safely finished and smoothly to the connecting lane and the interchange position 3 days ahead of expectation, and about 1 million tons of raw coal is produced. The method is verified to be capable of reinforcing and supporting the top plate and the two sides of the connecting roadway at the position of the interchange point on the advanced working face and manufacturing the false roof, so that smooth pushing and mining of the working face can be guaranteed, and the mining efficiency is improved.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (7)
1. A construction method for pushing and mining a working face through a vertical intersection point of an interconnecting roadway by a 110-method is characterized by comprising the following steps:
step A, the working face is pushed to a position less than 150m away from an upper connecting lane, and constant-resistance anchor cables are arranged in a lower connecting lane at an interchange point and matched with a channel steel support top plate and two sides;
b, paving rails in the upper connecting roadway, connecting and fixing the rails through anchor rods, connecting the rails and anchor cables through chains, and arranging wood piles in the upper connecting roadway at the positions of the cross points;
c, arranging a plurality of wood piles within a range of 20m from the vertical intersection point along the descending direction of the upper roadway;
and D, when the coal face is pushed to a position 2m away from the vertical intersection point, the large-proportion mining machine tail is adopted for mining on the face, and the face passes through the vertical intersection point of the connecting roadway.
2. The construction method of claim 1, wherein the constant-resistance anchor cable penetrates through a top plate of a lower connecting roadway, an upper connecting roadway and a direct top of the upper connecting roadway, and the height of the constant-resistance anchor cable penetrating through the direct top of the upper connecting roadway is greater than 3.5 m.
3. The construction method of the 110 method face pushing and mining through the vertical intersection point of the connecting roadway as claimed in claim 1, wherein the wood piles are arranged in a groined shape by using square wood, and each wood pile is connected with the top and penetrated firmly.
4. The construction method of claim 1, wherein a single hydraulic prop and a hydraulic prop are respectively installed at two sides of the lower roadway, and the lower roadway is supported by a combination of anchor rods, anchor cables and anchor nets.
5. The construction method of claim 4, wherein the lower roadway is supported by single hydraulic prop and hydraulic prop within the range of 20m ahead of the working face, the roadway near the mining working face is supported by hydraulic prop, and the roadway is supported by single hydraulic prop.
6. The construction method of claim 4, wherein the single hydraulic prop and the hydraulic prop are used for cleaning the bottom plate to a solid bottom before installation, and a cushion block is installed below the pillar leg when the bottom plate is soft coal rock.
7. The construction method of claim 4, wherein when the face is pushed and mined through the intersection of the connecting roadways, the tail of the machine is quickly pushed and mined, and the face is inclined to pass through the intersection of the connecting roadways.
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113863956A (en) * | 2021-09-24 | 2021-12-31 | 国家能源集团宁夏煤业有限责任公司 | Crossheading and roadway passing method for underground working face of coal mine |
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2020
- 2020-06-24 CN CN202010585767.0A patent/CN111764900B/en active Active
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SU1035221A1 (en) * | 1981-07-03 | 1983-08-15 | Донецкий Научно-Исследовательский Угольный Институт | Method of working gently-sloping coal seams with coal and gas outburst hazard present |
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CN103615258A (en) * | 2013-12-06 | 2014-03-05 | 中国矿业大学(北京) | Supporting structure and method of middle rock pillar of roadway junction point |
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Non-Patent Citations (1)
Title |
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陈善昌: "极近距离立体交义巷道交错段围岩控制与支护技术", 《煤炭工程》 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113863956A (en) * | 2021-09-24 | 2021-12-31 | 国家能源集团宁夏煤业有限责任公司 | Crossheading and roadway passing method for underground working face of coal mine |
CN113863956B (en) * | 2021-09-24 | 2023-08-22 | 国家能源集团宁夏煤业有限责任公司 | Coal mine underground working face gateway roadway passing method |
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