CN108086978B - Coal mining method suitable for deep well extra-thick coal seam - Google Patents
Coal mining method suitable for deep well extra-thick coal seam Download PDFInfo
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- CN108086978B CN108086978B CN201711366047.XA CN201711366047A CN108086978B CN 108086978 B CN108086978 B CN 108086978B CN 201711366047 A CN201711366047 A CN 201711366047A CN 108086978 B CN108086978 B CN 108086978B
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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 invention belongs to the field of coal mining, and particularly relates to a coal mining method suitable for a deep well extra-thick coal seam. A coal mining method suitable for deep wells and ultra-thick coal seams comprises the following steps of 101-naming a working face according to a mining sequence. And 102, tunneling a transportation roadway and an air return roadway along the top plate of the super-thick coal seam. 103-double lane digging to the position of the open cut hole. 104-pushing the working surface. 105, arranging the working face I according to the steps 102 and 103, and mining the working face I according to the step 104. 106-in the face I mining process, the cut-through is made according to step 103. And after the recovery of the working face I from 107, mining the working face II according to the step 104, and tunneling the working face III according to the step 106. 108-mining the working face III and tunneling the working face IV according to the step 104. 109-mining working face IV. 110-mining the face V according to step 104. And 111-according to the method, sequentially and circularly reciprocating until the coal seam is mined. The invention greatly improves the recovery rate and effectively solves the difficult problems of strong mine pressure appearance and the like faced by deep well exploitation.
Description
Technical Field
the invention belongs to the field of coal mining, and particularly relates to a coal mining method suitable for a deep well extra-thick coal seam.
Background
along with the development of coal mining to deep parts, the mine gradually has the problems of strong mine pressure appearance, difficult roadway maintenance, increased rock burst danger, deteriorated mining conditions, reduced production technical effect and economic benefit and the like.
china has no clear definition for deep wells, and the 'Chinese coal exploitation system' book divides a mine with the mining depth of 800-1200 m into deep wells. Coal seams having a thickness greater than 8m are conventionally referred to as extra thick coal seams. At present, a coal pillar retaining and roadway protecting mining method is generally adopted for mining ultra-thick coal seams of deep wells, and is specifically divided into a wide coal pillar retaining and a narrow coal pillar retaining. When a wide coal pillar is reserved for mining, roadways close to a goaf are often seriously deformed and difficult to maintain, the maintenance cost of some roadways even exceeds the cost of newly digging one roadway, and some roadways even just dug are not put into use and are forced to be abandoned due to serious deformation. The application of the narrow coal pillar gob-side entry retaining in the deep well ultra-thick coal seam overcomes the problems of serious deformation and difficult maintenance of the wide coal pillar gob-side entry retaining to a certain extent, but the application of the narrow coal pillar gob-side entry retaining in the high gas deep well has great limitation, and the recovery rate is limited because about 10m of the fully mechanized coal mining face end is not caving coal and the retained narrow coal pillar cannot be recovered in the later period.
The mining roadway of the deep well extra-thick coal seam is scientifically arranged, the mining succession relationship is reasonably planned, the problems of strong mine pressure appearance, rock burst, roadway deformation and the like are solved, and the method becomes an important subject which needs to be continuously explored and researched by technical personnel in the field.
Disclosure of Invention
The invention aims to solve the specific technical problems of how to safely, economically and effectively mine a deep well extra-thick coal seam, improve the recovery rate of coal resources of the extra-thick coal seam to the maximum extent and provide a coal mining method suitable for the deep well extra-thick coal seam.
The invention adopts the following technical scheme: a coal mining method suitable for deep well ultra-thick coal seams comprises the following steps,
101-naming the working faces according to the mining sequence, wherein the first mining working face is named as a working face I, and the second mining working face is named as a working face II, and the names are named in sequence.
And 102, tunneling a transportation roadway and an air return roadway along the top plate of the super-thick coal seam.
103-two roadways are dug to the cut hole, and are dug downwards to the bottom plate of the extra-thick coal seam at an inclination angle of 18 degrees, and the back edge of the extra-thick coal seam penetrates through the cut hole.
104-pushing the working face, wherein the bottom coal in the triangular area is not cut, and the top coal is kept.
105, arranging the working face I according to the steps 102 and 103, and mining the working face I according to the step 104.
106-working face I, tunneling working face II at an interval of working face width, tunneling a transportation roadway and a return airway according to step 102, and perforating according to step 103.
And after the recovery of the working face I from 107, mining the working face II according to the step 104, and tunneling the working face III according to the step 106.
And 108, after the stoping of the working face II is finished, the working face III is mined according to the step 104, meanwhile, the working face IV is tunneled, a transportation roadway of the transportation roadway is tunneled along the coal seam floor and arranged in the remaining triangular coal below the mined-out area of the working face I, a return airway is tunneled along the coal seam floor and arranged in the remaining triangular coal below the mined-out area of the working face II, and a cut hole of the working face IV is tunneled along the coal seam floor.
And after the 109-working face III stoping is finished, a working face IV is mined, no coal is discharged in a stoping roadway in the mining process, the top coal with the rest length of the working face can be discharged, meanwhile, a working face V is tunneled, a transportation roadway of the working face V is tunneled and arranged in the remaining triangular coal below the working face II goaf along the coal seam floor, and a return airway is tunneled and arranged in the remaining triangular coal below the working face III goaf along the coal seam floor.
and after the mining of the 110-working face IV is finished, mining the working face V according to the step 104.
And 111-according to the method, sequentially and circularly reciprocating until the coal seam is mined.
In the novel coal mining method suitable for the deep well extra-thick coal seam, step 103, considering the transportation capacity of the scraper conveyor, the inclination angle is set to be 18 degrees, 18 degrees are triangular coal retaining positions, and the included angle between the working surface and the bottom plate of the coal seam;
in the novel coal mining method suitable for the deep well extra-thick coal seam, a working face is arranged between the two goafs in the step 108, and a transportation roadway and a return airway are respectively arranged at the triangular coal-left positions below the two goafs according to the easy maintenance of a stoping roadway arranged in a stress reduction area.
In the above novel coal mining method suitable for deep well ultra-thick coal seams, the core principle of step 108 and step 109 is as follows: the excavation and replacement of the working face are carried out after the overlying strata migration of the adjacent goaf is stable.
Compared with the prior art, the invention has the beneficial effects that: compared with the mining of the ultra-thick coal seam under the traditional method, the mining area recovery rate is greatly improved, the problems of strong mine pressure appearance, serious roadway deformation and damage, difficult maintenance, increased rock burst risk and the like in deep well mining are effectively solved, and the method is suitable for popularization and application.
drawings
FIG. 1 is a schematic view of an inverted trapezoidal face arrangement;
FIG. 2 shows a heading arrangement face I;
FIG. 3 is a simultaneous excavation layout face II of the mining face I;
FIG. 4 is a simultaneous excavation layout face III of the mining face II;
FIG. 5 is a simultaneous excavation layout face IV of a mining face III;
Fig. 6 is a simultaneous excavation arrangement face v of the mining face iv.
in the figure: 1-inverted trapezoidal working face, 2-working face top coal, 3-triangular face top coal, 4-triangular face bottom coal, 5-inverted trapezoidal working face transportation roadway, 6-inverted trapezoidal working face return air roadway, 7-direct roof, 8-old roof, 9-working face I, 10-working face I goaf, 11-working face II, 12-working face II goaf, 13-working face III, 14-working face III goaf, 15-working face IV, 16-working face IV transportation roadway, 17-working face IV return air roadway, 18-working face IV goaf, 19-working face V, 20-working face V transportation roadway, 21-working face V return air roadway.
Detailed Description
the embodiment of the invention is further described below with reference to the accompanying drawings, and the novel coal mining method applicable to the deep well ultra-thick coal seam of the invention comprises the following specific steps:
a coal mining method suitable for deep well ultra-thick coal seams comprises the following steps,
101-naming the working faces according to the mining sequence, wherein the first mining working face is named as a working face I, and the second mining working face is named as a working face II, and the names are named in sequence.
And 102, tunneling a transportation roadway and an air return roadway along the top plate of the super-thick coal seam.
103-two roadways are dug to the cut hole, and are dug downwards to the bottom plate of the extra-thick coal seam at an inclination angle of 18 degrees, and the back edge of the extra-thick coal seam penetrates through the cut hole.
104-pushing the working face, wherein the bottom coal in the triangular area is not cut, and the top coal is kept.
105, arranging the working face I according to the steps 102 and 103, and mining the working face I according to the step 104.
106-working face I, tunneling working face II at an interval of working face width, tunneling a transportation roadway and a return airway according to step 102, and perforating according to step 103.
and after the recovery of the working face I from 107, mining the working face II according to the step 104, and tunneling the working face III according to the step 106.
and 108, after the stoping of the working face II is finished, the working face III is mined according to the step 104, meanwhile, the working face IV is tunneled, a transportation roadway of the transportation roadway is tunneled along the coal seam floor and arranged in the remaining triangular coal below the mined-out area of the working face I, a return airway is tunneled along the coal seam floor and arranged in the remaining triangular coal below the mined-out area of the working face II, and a cut hole of the working face IV is tunneled along the coal seam floor.
And after the 109-working face III stoping is finished, a working face IV is mined, no coal is discharged in a stoping roadway in the mining process, the top coal with the rest length of the working face can be discharged, meanwhile, a working face V is tunneled, a transportation roadway of the working face V is tunneled and arranged in the remaining triangular coal below the working face II goaf along the coal seam floor, and a return airway is tunneled and arranged in the remaining triangular coal below the working face III goaf along the coal seam floor.
and after the mining of the 110-working face IV is finished, mining the working face V according to the step 104.
And 111-according to the method, sequentially and circularly reciprocating until the coal seam is mined.
take the example of five working faces arranged in a panel.
firstly, as shown in fig. 1, tunneling an inverted trapezoidal working face haulage roadway 5 and an air return roadway 6 along the top plate of the extra-thick coal seam, tunneling the two roadways to the cutting holes, respectively downward to the bottom plate of the extra-thick coal seam at an inclination angle of 18 degrees, penetrating the cutting holes along the bottom plate, and having the effect as shown in fig. 2 after penetrating;
Secondly, as shown in fig. 3, in the mining process of the working face I9, the working face II11 is tunneled at intervals of one working face width, and a transportation roadway and a return air roadway are tunneled according to the step I;
Thirdly, as shown in fig. 4, in the process of mining the working face II11, the working face III13 is tunneled at intervals of one working face width, and a transportation roadway and an air return roadway are tunneled according to the step I;
fourthly, as shown in fig. 5, in the mining process of the working face III13, a working face IV15 is arranged along the bottom plate of the extra-thick coal seam in a tunneling mode, a transportation roadway 16 of the working face IV is arranged below the working face I gob 10, and a return air roadway 17 of the working face II gob 12 is arranged below the working face II gob;
fifthly, as shown in fig. 6, in the mining process of the working face IV15, a working face V19 is arranged along the floor of the extra-thick coal seam, a haulage roadway 20 is arranged under the working face II goaf 12, a return air roadway 21 is arranged under the working face III goaf 14, and the working face V is recovered after the cut hole penetrates along the floor of the coal seam.
Claims (1)
1. a coal mining method suitable for deep well ultra-thick coal seams is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
101, naming the working faces according to the mining sequence, wherein the first mining working face is named as a working face I, and the second mining working face is named as a working face II, and naming is carried out in sequence;
102-tunneling a transportation roadway and an air return roadway along the top plate of the super-thick coal seam;
103-two roadways are dug to the position of the cut hole, and are dug downwards to the bottom plate of the extra-thick coal seam at an inclination angle of 18 degrees, and the back edge of the extra-thick coal seam penetrates through the cut hole;
104-pushing the working face, wherein the bottom coal in the triangular area is not cut, and the top coal is kept not to be placed;
105, arranging the working face I according to the steps 102 and 103, and mining the working face I according to the step 104;
106-working face I, tunneling a working face II at intervals of one working face width in the mining process, tunneling a transportation roadway and a return airway according to the step 102, and perforating according to the step 103;
107-working face I mining is finished, working face II is mined according to step 104, and working face III is tunneled according to step 106;
108, mining the working face III according to the step 104 after the stoping of the working face II is finished, and simultaneously tunneling the working face IV, wherein a transportation roadway of the transportation roadway is tunneled along a coal seam floor and arranged in the residual triangular coal below the goaf of the working face I, a return airway is tunneled along the coal seam floor and arranged in the residual triangular coal below the goaf of the working face II, and a cutting hole of the working face IV is tunneled and communicated along the coal seam floor;
109-working face III, mining a working face IV, removing a stoping roadway in the mining process without discharging coal, discharging top coal with the rest length of the working face, tunneling a working face V, tunneling a transportation roadway of the working face V along a coal seam floor and arranging the transportation roadway in the remaining triangular coal below the working face II goaf, and tunneling a return airway along the coal seam floor and arranging the return airway in the remaining triangular coal below the working face III goaf;
110-working face IV mining is finished, and working face V is mined according to step 104;
And 111-according to the method, sequentially and circularly reciprocating until the coal seam is mined.
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| CN112943243B (en) * | 2021-02-08 | 2023-03-24 | 中国矿业大学 | Method for old hole cutting of oversize section of fully mechanized caving face of shallow-buried extra-thick coal seam |
| CN116104495B (en) * | 2022-11-30 | 2023-09-22 | 华能煤炭技术研究有限公司 | Obstacle-passing stoping method for gob-side entry retaining coal face |
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|---|---|---|---|---|
| CN1190693A (en) * | 1998-02-18 | 1998-08-19 | 中国矿业大学（北京校区） | All thickness coal mining method for seam misplaced coal tunnel distribution on thick seam |
| CN101915099A (en) * | 2010-07-31 | 2010-12-15 | 太原理工大学 | Bidirectional U-shaped coal-mining method of thick coal bed by gateway layout along stability layer |
| CN102102518A (en) * | 2011-01-05 | 2011-06-22 | 河南理工大学 | Top coal caving coordinated mining method for thick coal seam under dam body of reservoir |
| CN205172581U (en) * | 2015-12-05 | 2016-04-20 | 西安科技大学 | Super high seam high stage that slopes greatly moves towards comprehensive decontroling of wall type and adopts structure |
| CN105673014A (en) * | 2016-01-07 | 2016-06-15 | 山东科技大学 | Method for controlling rock burst of hard roof jump mining working face |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2261329C1 (en) * | 2004-06-23 | 2005-09-27 | Институт горного дела Сибирского отделения Российской академии наук | Method for coal excavation from thick steeply beds |
| RU2293182C1 (en) * | 2005-06-15 | 2007-02-10 | Государственное образовательное учреждение высшего профессионального образования СИБИРСКИЙ ГОСУДАРСТВЕННЫЙ ИНДУСТРИАЛЬНЫЙ УНИВЕРСИТЕТ | Method for extraction of thin and averagely thick steep formations of mineral resource with backfill of extracted space |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1190693A (en) * | 1998-02-18 | 1998-08-19 | 中国矿业大学（北京校区） | All thickness coal mining method for seam misplaced coal tunnel distribution on thick seam |
| CN101915099A (en) * | 2010-07-31 | 2010-12-15 | 太原理工大学 | Bidirectional U-shaped coal-mining method of thick coal bed by gateway layout along stability layer |
| CN102102518A (en) * | 2011-01-05 | 2011-06-22 | 河南理工大学 | Top coal caving coordinated mining method for thick coal seam under dam body of reservoir |
| CN205172581U (en) * | 2015-12-05 | 2016-04-20 | 西安科技大学 | Super high seam high stage that slopes greatly moves towards comprehensive decontroling of wall type and adopts structure |
| CN105673014A (en) * | 2016-01-07 | 2016-06-15 | 山东科技大学 | Method for controlling rock burst of hard roof jump mining working face |
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