CN110080767A - A kind of thick seam slicing system working face overlap joint method for arranging - Google Patents
A kind of thick seam slicing system working face overlap joint method for arranging Download PDFInfo
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- CN110080767A CN110080767A CN201910267218.6A CN201910267218A CN110080767A CN 110080767 A CN110080767 A CN 110080767A CN 201910267218 A CN201910267218 A CN 201910267218A CN 110080767 A CN110080767 A CN 110080767A
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- working face
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
The present invention relates to a kind of recovery methods in coal seam, disclose a kind of thick seam slicing system working face overlap joint method for arranging；With realize high seam between division working face without coal column or negative coal pillar mining, stress of coal pillar is avoided to concentrate bring mine pressure problem, and improve coal mining rate, it is specially wrong in the crossheading and first stratified operation right side of face crossheading on each layering right side in upper section head layering lower section to arrange, and interior wrong distance is a lane Xiang Banzhiliang, respectively layering left side crossheading to the left lower section insertion with upper section head layering right side crossheading Chong Die underface corresponding position of the subsequent section in addition to lowest part is layered；The present invention changes the status that coal pillar mining is stayed in traditional separate zone production, improves recovery ratio；Goaf arranged beneath crossheading stress is low, and roadway maintenance is at low cost；And a upper lapping of section higher slice, it is used twice for the staggered floor crossheading that this section lower leaf and adjacent sections are inserted into obliquely, increases lapping utilization rate.
Description
Technical field
The present invention relates to a kind of recovery method in coal seam more particularly to a kind of thick seam slicing system working face overlap joint arrangements
The separate zone production method of technology.
Background technique
Thick coal-layer mining occupies an important position in China's pit mining, and yield and reserves account for 45% or so.20th century
The mid-80 is a separation of China's underground longwall mining method for extraction, and within a very long time, China mainly uses layering side
Method carrys out high seam mining.
So-called separate zone production is exactly that high seam is artificially divided into several suitable coal seams once produced, then successively opens
The method adopted.In general, each be layered between 2-3 m, in order to arrange working face and tunnel etc..Separate zone production is in China's production history
On occupy consequence, State owned coal mine once more than a quarter of total output passes through separate zone production and produces.
According to the difference of layering division mode, main includes horizontal, inclination and inclined cuting layering, specifically how to be layered, needs to have
Body is selected according to different geological conditions.A variety of exploitations can be obtained according to layering division, extraction order between layers etc.
Mode.Common such as the incline cut and fill stoping uplink method of collecting coal by the means of filling and incline cut and fill stoping downlink caving method.Incline cut and fill stoping downlink is caving
Coal-mining method is a kind of main recovery method used for medium-thickness seam in 20th century of China, after first layer back production, lower point
Layer is, for the safety for guaranteeing lower leaf coal working face, to be laid with Man-made False in higher slice across back production is carried out under falling rock, than
Such as plastic wire or metal mesh false roof.
In same section upper lower leaf face can keep it is certain it is wrong away under conditions of carry out back production simultaneously, referred to as
" layering is same to adopt ".After a layering can also have been adopted in section, by the regular hour, after top plate across fall it is basicly stable after,
Lower leaf gallery is tunneled again, then carries out back production, referred to as " layering point is adopted ".During separate zone production, if upper and lower two
It is layered while exploiting, then need to guarantee certain mistake away from so that lower leaf face was being exploited between two working faces up and down
Cheng Zhongxu guarantees that the movement of higher slice working face overlying strata has tended towards stability.General lower leaf face is bigger late than higher slice working face
About at 3 ~ 4 months.Base object model hardness is quite big and when directly pushing up relatively thin, can suitably shorten it is wrong away from and interval time.
In separate zone production, lower leaf face gallery arrangement form multiplicity, as shown in Figure 1, outer wrong formula, overlapping can be divided into
Formula, interior wrong formula.When high seam mining, each mutual alignment for being layered gallery is affected for the operation and maintenance situation in tunnel.
Unofficial type disposal mode will cause the influence of all supported pressure of each slice drift, and road floor is big, and roadway maintenance is difficult.Interior mistake
Formula tunnel is directly arranged at stable goaf lower edge, in the distressed zone under goaf, roadway surrounding rock pressure
It is small, easy supporting.However, the coal column between two sections not can avoid using which kind of arrangement, stress of coal pillar concentration is brought
Some voltage-controlled problems processed of mine, coal column cause land subsidence to cleave fluctuating, and the low problem of section recovery ratio is difficult to solve for a long time.
Summary of the invention
The present invention overcomes the shortcomings of the prior art, provides a kind of thick seam slicing system working face overlap joint arrangement side
Method changes the status that coal pillar mining is stayed in traditional separate zone production, solves since coal column causes land subsidence to cleave fluctuating, area
The low problem of section recovery ratio.
The present invention is achieved through the following technical solutions.
A kind of thick seam slicing system working face overlap joint method for arranging, comprising the following steps:
A) according to overall thickness of coal bed, the number of plies of separate zone production is determined, so that each lift height is the thickness of fully mechanized mining full-seam mining
Degree.
B) arrange the first section working face: the right crossheading dislocation arrangement of the first section working face, the dislocation arrangement is first
The right crossheading of first floor working face of section exceeds the distance of second layer working face 1-2 span length of right crossheading of the first section, is
Coal is maximumlly produced, interior mistake required distance is no more than the distance of two span lengths.The work below of second layer working face
The right crossheading arranged superposed in face, so that the outer mistake lower part right crossheading 1- of all division working faces of the right crossheading of first floor working face of the first section
The distance of 2 span lengths.No matter divide several layers of, only the outer wrong all division working faces in lower part of the right crossheading of first division working face are right
The distance of one or two span length of crossheading.
C) arrange the second section working face: the left crossheading of first division working face of the second section working face is arranged in first
Below section first floor working face, and arranged with wrong in the first section head division working face, maximumlly to produce coal, it is interior it is wrong away from
With a distance from two from < span lengths；The first division working face of second section working face from its left crossheading side slope to completely into
Enter the work kept man of a noblewoman's layering of the second section；Meanwhile other than the layering of lowest part, the second section second layer working face work below
The left crossheading arranged superposed in face；The second right crossheading of section working face is identical as the right crossheading method for arranging of the first section working face.
D) the step of repeating step a-c is sequentially arranged follow-up work face, until working face all complete by arrangement.
Further, the left crossheading that the first section working face is respectively layered is arranged superposed or is interior wrong arrangement.
Further, the left crossheading of first division working face of the second section working face described in step c is arranged in the first section
The lower section of the right crossheading of first floor working face, and the left crossheading of first division working face of the second section working face and the first section second layer work
Make to be spaced a fender between the right crossheading in face, to completely cut off left side goaf.
It is further preferred that the left crossheading of the first division working face of the second section working face is close to the work of the first section first floor
Face.
It is further preferred that the slope distance that rises on described slope is 10-15m, guarantee bracket gradually transition.
The present invention is generated compared with the existing technology to be had the beneficial effect that.
A kind of thick seam slicing system working face overlap joint method for arranging of the present invention changes traditional separate zone production and stays coal column
The crossheading oblique cutting of the top layering of rear section position is entered previous section working face and is accordingly layered under goaf by the status of exploitation
Square, at least half of coal column is recycled between adjacent sections, improves recovery ratio；Secondly, avoiding due to stress of coal pillar collection
The voltage-controlled system of middle bring mine is difficult, and land subsidence cleaves fluctuating, the low problem of section recovery ratio.Goaf arranged beneath crossheading stress
Low, roadway maintenance is at low cost；Again, a upper lapping of section higher slice, obliquely for this section lower leaf and adjacent sections
The staggered floor crossheading of insertion uses twice, increases lapping utilization rate.
Detailed description of the invention
Fig. 1 is that arrangement schematic diagram is often used in point two layers of exploitation lower leaf.
Crossheading arrangement schematic diagram when Fig. 2 is two layers of exploitation of the present invention point.
Crossheading arrangement schematic diagram when Fig. 3 is three layers of exploitation of the present invention point.
Wherein, 1 be the first section first floor working face, 2 for the first section first floor working face right crossheading, 3 be first
Section second layer working face, 4 be the right crossheading of the first section second layer working face, and 5 are layered work for the first of the second section working face
Make face, 6 be the left crossheading of the first division working face of the second section working face, and 7 be the second section second layer working face, and 8 be first
The left crossheading that section working face is respectively layered, 9 be the third layer working face of the first section, and 10 be the third layer working face of the first section
Right crossheading, 11 be the second section second layer working face left crossheading, 12 be the second section third layer working face.
Specific embodiment
In order to which technical problems, technical solutions and advantages to be solved are more clearly understood, in conjunction with reality
Example and attached drawing are applied, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used to
It explains the present invention, is not intended to limit the present invention.Below with reference to the examples and drawings technical solution that the present invention will be described in detail, but
The scope of protection is not limited by this.
Embodiment 1
A kind of thick seam slicing system working face overlap joint method for arranging, comprising the following steps:
Step 1: the number of plies of separate zone production is determined according to overall thickness of coal bed, so that each lift height is fully mechanized mining full-seam mining
Thickness；If the coal seam of coalfield 3 is averaged coal 5.3 m of thickness on level ground, if point three layers of exploitation, the thickness of every layering is lower, therefore counts
Two layers of exploitation is divided, the height of each layering is 2.65 m, is suitble to coal cutting of coalcutter.
Step 2: the first section working face of arrangement: two layers of coalfield point on level ground, according to the arrangement of Fig. 2.Firstth area
The left crossheading 8 that section working face is respectively layered is arranged superposed；The right crossheading dislocation arrangement of first section working face, i.e., interior wrong formula arrangement:
The right crossheading 2 of the first floor working face 1 of first section exceeds 4 one lane Xiang Banzhiliang of right crossheading of the first section second layer working face 3
The distance of road width；
Step 3: arrangement the second section working face: the left crossheading 6 of the first division working face 5 of the second section working face to the left lower section
Oblique cutting enters below 1 goaf of first floor working face of the first section, cloth Chong Die with the right crossheading 2 of first floor working face 1 of the first section
It sets.And other side tunnel and normal arrangement are consistent.Therefore, oblique section is delayed in two section head division working face left ends formation one, by flat
Working face gradually transits to level after having delayed slope, and playing slope distance is 15m, guarantees bracket gradually transition.And the second section second layer
The crossheading arrangement of working face 7 is then consistent with the first section second layer working face 3.
Step 4: determining the mining sequence between each division working face.From left to right according to section, it is layered from top to bottom suitable
Sequence exploitation.The first floor working face 1 of the first section is first exploited, then adopts the first section second layer working face 3, then exploits the second section
The first division working face 5 of working face finally adopts the second section second layer working face 7, and so on.
Thick seam slicing system working face overlap joint method for arranging changes the status that coal pillar mining is stayed in traditional separate zone production,
The crossheading oblique cutting of the top layering of rear section position is entered into the lower section that previous section working face is accordingly layered goaf, adjacent sections
Between at least half of coal column recycled (half at point two layers, three layers or more be then layered the more recovery ratios of quantity bigger), mention
High recovery ratio.Secondly, goaf arranged beneath crossheading stress is low, roadway maintenance is at low cost.In addition, upper section higher slice one
Secondary lapping uses twice for the staggered floor crossheading that this section lower leaf and adjacent sections are inserted into obliquely, increases lapping utilization rate.
Embodiment 2
As shown in figure 3, being the working face arrangement schematic diagram that coal seam is divided into 3 layers, the left crossheading 8 that the first section working face is respectively layered
For arranged superposed；The right crossheading dislocation arrangement of first section working face, i.e., interior wrong formula arrangement: the first floor working face 1 of the first section
Right crossheading 4 one lane of the right crossheading 2 beyond the first section second layer working face 3 is partly to the distance of two span lengths；First section
4 arranged superposed of right crossheading of the right crossheading 10 of third layer working face 9 and the first section second layer working face 3.
Arrange the second section working face: the left crossheading 6 of the first division working face 5 of the second section working face lower section oblique cutting to the left
Below 1 goaf of first floor working face for entering the first section, 2 arranged superposed of right crossheading with the first floor working face 1 of the first section.The
The left crossheadings 11 of the two section second layer working faces 7 first division working face 5 that lower section oblique cutting enters the second section working face to the left is adopted
Below dead zone, 6 arranged superposed of left crossheading with the first division working face 5 of the second section working face.And other side tunnel and normal
Arrangement is consistent.Therefore, the left end of two section head division working faces and the second section second layer working face 7 is respectively formed one and delays oblique section,
Working face gradually transits to level after gently playing slope, and playing slope distance is 13m, guarantees bracket gradually transition.And the second section
The crossheading arrangement of third layer working face 12 is then consistent with the first section second layer working face 3.
Step 4: determining the mining sequence between each division working face.From left to right according to section, it is layered from top to bottom suitable
Sequence exploitation.The first floor working face 1 of the first section is first exploited, then adopts the first section second layer working face 3, then exploits the first section
Third layer working face 9, exploit the first division working face 5 of the second section working face again later, adopt the second section second layer work
The second section third layer working face 12 is finally exploited in face 7, and so on.
The above content is combine specific preferred embodiment to the further description done of the present invention, and it cannot be said that
A specific embodiment of the invention is only limitted to this, for those of ordinary skill in the art to which the present invention belongs, is not taking off
Under the premise of from the present invention, several simple deduction or replace can also be made, all shall be regarded as belonging to the present invention by being submitted
Claims determine scope of patent protection.
Claims (5)
1. a kind of thick seam slicing system working face overlaps method for arranging, which comprises the following steps:
A) according to overall thickness of coal bed, the number of plies of separate zone production is determined, so that each lift height is the thickness of fully mechanized mining full-seam mining
Degree；
B) arrange the first section working face: the right crossheading dislocation arrangement of the first section working face, the dislocation arrangement is the first section
First floor working face (1) right crossheading (2) exceed the first section second layer working face (3) right crossheading (4) 1-2 span length
Distance, the first right crossheading arranged superposed of section second layer working face (3) working face below, so that the first floor work of the first section
Make the distance of the right crossheading (2) in face (1) right 1-2 span length of crossheading of the wrong all division working faces in lower part outside；
C) arrange the second section working face: first division working face (5) the left crossheading (6) of the second section working face is arranged in the firstth area
Below the first floor working face (1) of section, and arranged with wrong in the first floor working face (1) of the first section, interior mistake two tunnels distance <
The distance of width；The first division working face (5) of second section working face from its left crossheading (6) side slope to completely into second
Section work kept man of a noblewoman's layering；Meanwhile other than the layering of lowest part, second section second layer working face (7) working face below
Left crossheading arranged superposed；The second right crossheading of section working face is identical as the right crossheading method for arranging of the first section working face；
D) the step of repeating step a-c is sequentially arranged follow-up work face, until working face all complete by arrangement.
2. a kind of thick seam slicing system working face according to claim 1 overlaps method for arranging, which is characterized in that first
The left crossheading that section working face is respectively layered is arranged superposed or is interior wrong arrangement.
3. a kind of thick seam slicing system working face according to claim 1 overlaps method for arranging, which is characterized in that step
The left crossheading (6) of the first division working face (5) of second section working face described in c is arranged in the first floor working face of the first section
(1) lower section of right crossheading (2), and the left crossheading (6) of the first division working face (5) of the second section working face and the first section the
A fender is spaced between the right crossheading (4) of two layers of working face (3), to completely cut off left side goaf.
4. a kind of thick seam slicing system working face according to claim 1 or 3 overlaps method for arranging, which is characterized in that
The left crossheading (6) of the first division working face (5) of second section working face is close to the first floor working face (1) of the first section.
5. a kind of thick seam slicing system working face according to claim 1 overlaps method for arranging, which is characterized in that described
The slope distance that rises for playing slope is 10-15m, guarantees bracket gradually transition.
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| CN201910267218.6A CN110080767B (en) | 2019-04-03 | 2019-04-03 | Overlap joint arrangement method for layered mining working face of thick coal seam |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377194A (en) * | 2020-11-06 | 2021-02-19 | 窑街煤电集团有限公司 | Method for preventing rock burst by staggered arrangement of mining working face roadway |
| CN114000902A (en) * | 2021-09-22 | 2022-02-01 | 中国矿业大学(北京) | Method for maintaining broken top plate of negative coal pillar roadway by grouting reinforcement anchor rod suspension |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107544B (en) * | 2021-05-25 | 2022-11-25 | 太原理工大学 | Grouting method and device for adjacent crossroads in internal-staggered-layer coal mining method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112377194A (en) * | 2020-11-06 | 2021-02-19 | 窑街煤电集团有限公司 | Method for preventing rock burst by staggered arrangement of mining working face roadway |
| CN114000902A (en) * | 2021-09-22 | 2022-02-01 | 中国矿业大学(北京) | Method for maintaining broken top plate of negative coal pillar roadway by grouting reinforcement anchor rod suspension |
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