CN113605919A - Method for reusing upper layered working face roadway reserved as lower layered working face - Google Patents
Method for reusing upper layered working face roadway reserved as lower layered working face Download PDFInfo
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- CN113605919A CN113605919A CN202110943864.7A CN202110943864A CN113605919A CN 113605919 A CN113605919 A CN 113605919A CN 202110943864 A CN202110943864 A CN 202110943864A CN 113605919 A CN113605919 A CN 113605919A
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- working face
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D9/10—Making by using boring or cutting machines
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
Abstract
The invention belongs to the technical field of coal mining, and particularly relates to a method for reserving an upper layered working face roadway as a lower layered working face for reuse. Comprises the following steps. S100, dividing the working face into an upper layered working face and a lower layered working face, and mining the upper layered working face first and then mining the lower layered working face. S200, tunneling an upper-layer working face roadway, S300, stoping the upper-layer working face, and S400, filling the connecting roadway to solve the problems of roof contact and gob conduction when the lower-layer working face stopes to the area before mining the lower-layer working face. S500, tunneling the lower layered working face, and S600, stoping the lower layered working face. The invention reserves the upper layered working face tunnel for the lower layered working face, solves the problem of waste of tunnel resources in the boundary area or the special area, reduces the tunnel tunneling engineering quantity and relieves the tension situation of mine excavation connection.
Description
Technical Field
The invention belongs to the technical field of coal mining, and particularly relates to a method for reserving an upper layered working face roadway as a lower layered working face for reuse.
Background
Aiming at a high gas stratified mining mine, in order to meet the ventilation requirement, double-lane tunneling is required in the tunneling process of a working face tunnel, the outer side tunnel of the working face can be reused for the adjacent working face with the same stratum under the normal condition, but for the working face of a boundary area or a special area, the outer side tunnels of an upper stratum and a lower stratum working face cannot be reused after the working face is used, and the great waste of tunnel resources is caused. Meanwhile, roadway-protecting coal pillars are reserved between the upper-layered double roadway and the lower-layered double roadway, so that waste of coal resources is caused.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The invention provides a method for reserving an upper-layer working face roadway as a lower-layer working face for reuse, which aims to solve the problem of waste of roadway resources in a boundary area or a special area.
The invention adopts the following technical scheme: a method for reusing an upper layered working face roadway reserved as a lower layered working face comprises the following steps.
S100, dividing the working face into an upper layered working face and a lower layered working face, and mining the upper layered working face first and then mining the lower layered working face.
S200, tunneling an upper layered working face roadway, wherein two roadways are respectively arranged on two sides of the upper layered working face, the two roadways on the left side of the upper layered working face are respectively a primary-use roadway and a multiplexing roadway close to the working face, the primary-use roadway close to the working face is arranged along the coal seam roof, and the multiplexing roadway is arranged in a lower layered working face; the two roadways on the right side of the upper layered working face are an upper layered inner side roadway and an upper layered outer side roadway respectively, and the two roadways on the left side and the right side are communicated through a connecting roadway.
S300, performing upper-layer mining on the working face, performing joint cutting and drilling in advance in the roadway close to the working face, performing joint cutting on the top plate of the roadway, weakening the influence of the stress of the top plate on the roadway on the outer side, simultaneously promoting the top plate to collapse behind the working face in time, preventing the roof from being not tightly connected during lower-layer mining, reserving a multiplexing roadway and multiplexing the lower-layer mining.
S400, before the lower layered working face is mined, filling the connecting roadway to solve the problems of roof contact and gob conduction when the lower layered working face is mined to the area.
And S500, tunneling the lower layered working face, wherein a tunnel does not need to be tunneled again on one side of the multiplexing tunnel in the lower layered working face, ventilation, transportation and pedestrians are carried out by using the multiplexing tunnel, and a newly tunneled lower layered working face is arranged on the other side of the lower layered working face.
S600, carrying out lower layered working face stoping.
In the step S200, the size of the coal pillar between two roadways is 5-50m, the section of the roadway is a rectangular section, and the connecting roadway is a drift or an inclined roadway.
In the step S200, in the tunneling process of the upper layered working face roadway, the boundary side multiplexing roadway is arranged in the lower layered working face coal body.
In the step S300, when the cutting and drilling construction is carried out, the distance from the upper layered stope working face to the upper layered stope working face is 30m, the cutting and drilling arrangement mode is that a row of cutting and drilling holes are arranged along the axis of the roadway, the cutting and drilling arrangement position is close to a top plate on one side of the coal pillar as far as possible according to construction conditions, the drilling construction angle is an angle perpendicular to the top plate or an angle with a certain deviation to the rear of the working face, and the top plate is weakened in a blasting pre-splitting mode.
In step S400, the communication lanes are filled with a high-water material.
In the step S600, in the stoping process, the working face roof conditions are inconsistent, the outer end area is a coal roof, other areas are false roofs, roof management of the working face transition area needs to be enhanced, the roof management of the working face transition area is ensured to be timely and qualified in initial supporting force by enhancing the coal pillar roof, the goaf false roof and the transition area support management, meanwhile, the mine pressure observation of the area needs to be enhanced, and the support is timely enhanced in case of abnormity.
Compared with the prior art, the invention has the following beneficial effects:
(1) the upper layered working face roadway is reserved and reused as the lower layered working face, the problem of waste of roadway resources in boundary areas or special areas is solved, the roadway tunneling engineering quantity is reduced, and the situation of tension in mine excavation connection is relieved.
(2) One side of the lower layered working face multiplexing roadway can be free from remaining coal pillars, so that the recovery rate of coal can be effectively improved.
Drawings
Fig. 1 is a plan view of a roadway layout according to a first embodiment of the present invention;
fig. 2 is a sectional view of a roadway layout according to a first embodiment of the present invention;
in the figure, 1-an upper layered working face, 2-a lower layered working face, 3-a one-time use roadway close to the working face on the side of an upper layered boundary, 4-a boundary side multiplexing roadway, 5-a lower layered working face newly-excavated roadway, 6-an upper layered inner roadway, 7-an upper layered outer roadway, 8-a connection roadway, 9-a seam cutting hole and 10-a seam cutting line.
Detailed Description
The present invention will be described in detail with reference to specific examples.
The invention is directed at the problem of roadway resource waste and coal pillar resource loss caused by the fact that the roadway at the boundary area or the outer side of the special area of the layered mining working face cannot be reused, the specific method of the invention is that two roadways at the boundary area or the outer side of the special area of the upper layered working face are arranged at different layers, the roadway close to the working face is arranged in the coal body of the upper layered working face, the outer side roadway is arranged in the coal body of the lower layered working face, the two roadways are communicated through a connecting roadway, in the mining process of the upper layered working face, the roadway close to the working face is scrapped due to the collapse of a top plate behind the working face, the outer side roadway is reserved for the use of the lower layered working face, when the roadway of the lower layered working face is arranged, the roadway is reserved at one side without tunneling, the roadway is only tunneled at the other side of the working face, the tunneling engineering quantity of the tunneling roadway is reduced, the situation of tense tunneling connection is relieved, meanwhile, no coal pillar is reserved on one side of the lower layered working face roadway, so that the resource recovery rate is improved; in the process of mining the upper layered mining face, the working face is advanced by 30m, and in a roadway close to one side of the working face, a seam cutting and drilling hole is constructed along the axial direction of the roadway on the top plate of the roadway close to one side of a coal pillar in the roadway close to one side of the working face to perform blasting pre-splitting, so that the influence of the stress of the top plate on the roadway on the outer side is weakened, the top plate is promoted to collapse behind the working face in time, the phenomenon that the top is not firmly connected during lower layered mining is prevented, and the roadway on the outer side is reserved and is reused for lower layered mining; in the arrangement process of the lower layered working face, a roadway does not need to be tunneled on one side of the roadway, and ventilation, transportation and pedestrians are carried out by the roadway; before the lower layered working face is mined, filling the connecting roadway to solve the problems of roof contact and gob conduction when the lower layered working face is mined to the area; in the process of mining the lower layered working face, the conditions of the working face top plate are inconsistent, the outer end area is a coal top, other areas are false tops, the management of the working face transition area top plate is to be enhanced, and the support pulling frame is ensured to be timely and qualified in initial supporting force.
The key problem in the embodiment of the invention is that the arrangement position and the mode of the roadway of the upper layered working face can ensure that the reserved roadway is reused as the lower layered working face, and simultaneously ensure that the safe recovery of the lower layered working face is not influenced by the empty roadway and the insufficient subarea caused by the collapse of the upper layer.
An example of the invention is further described below with reference to the accompanying drawings.
Fig. 1 and 2 show plan views and cross-sectional views of the arrangement of the upper and lower layered roadways in the invention.
A method for reusing an upper layered working face roadway reserved as a lower layered working face comprises the following steps.
S100, dividing the working face into an upper layered working face 1 and a lower layered working face 2, and mining the upper layered working face 1 first and then mining the lower layered working face 2.
S200, tunneling an upper layered working face 1, wherein two roadways are respectively arranged on two sides of the upper layered working face 1, the two roadways on the left side of the upper layered working face 1 are a primary-use roadway 3 close to the working face and a boundary-side multiplexing roadway 4, the primary-use roadway 3 close to the working face is arranged along the top plate of the coal seam, and the boundary-side multiplexing roadway 4 is arranged in a lower layered working face 2; two roadways on the right side of the upper layered working face 1 are an upper layered inner side roadway 6 and an upper layered outer side roadway 7 respectively, and the two roadways on the left side and the right side are communicated through a connecting roadway 8.
The size of the coal pillar between the two roadways is 5-50m, the section of the roadway is a rectangular section, and the connecting roadway is a drift or an inclined roadway. And in the tunneling process of the roadway of the upper layered working face, the multiplex roadway at the boundary side is arranged in the coal body of the lower layered working face.
S300, performing mining on the upper layered mining face 1, advancing the construction joint cutting and drilling hole 9 of the working face in the roadway 3 close to the working face, performing joint cutting on the top plate of the roadway, weakening the influence of the stress of the top plate on the roadway at the outer side, simultaneously promoting the top plate to collapse at the rear of the working face in time, preventing the roof from being not tight during the lower layered mining, and reserving the boundary side multiplexing roadway 4 for multiplexing the lower layered mining.
For 30m in advance in the construction of joint cutting drilling 9, the layering stope face is far away, joint cutting drilling arrangement mode is for arranging one along the tunnel axis, joint cutting hole arrangement position is according to construction conditions, is close to coal pillar one side roof as far as possible, and drilling construction angle is perpendicular roof or takes the angle of certain erroneous tendency working face rear, and joint cutting hole adopts the blasting presplitting mode to weaken the roof.
S400, before the lower layered working face 2 is mined, the connecting roadway 8 is filled to solve the problems of roof contact and gob conduction when the lower layered working face is stoped to the area. The connecting lane is filled with high-water material.
S500, tunneling the lower layered working face 2, wherein a tunnel does not need to be tunneled again at one side of the boundary side multiplex tunnel 4 in the lower layered working face 2, ventilation, transportation and pedestrians are carried out by using the boundary side multiplex tunnel 4, and a lower layered working face newly-tunneled tunnel 5 is arranged at the other side of the lower layered working face 2.
S600, carrying out mining on the lower layered working face 2. In the stoping process, the working face roof conditions are inconsistent, the outer side end area is a coal roof, other areas are false roofs, roof management of the working face transition area is to be enhanced, management of the coal pillar roof, the goaf false roof and the transition area support is enhanced, timely qualified initial support force of the pulling frame is ensured, meanwhile, mine pressure observation of the area needs to be enhanced, and support is timely enhanced in case of abnormity.
Claims (6)
1. A method for setting a tunnel of an upper layered working face as a tunnel of a lower layered working face for reuse is characterized in that: comprises the following steps of (a) carrying out,
s100, dividing a working face into an upper layered working face (1) and a lower layered working face (2), and mining the upper layered working face (1) and then mining the lower layered working face (2);
s200, performing roadway excavation on an upper layered working face (1), wherein two roadways are respectively arranged on two sides of the upper layered working face (1), the two roadways on the left side of the upper layered working face (1) are a primary-use roadway (3) close to the working face and a boundary-side multiplexing roadway (4), the primary-use roadway (3) close to the working face is arranged along the coal seam roof, and the boundary-side multiplexing roadway (4) is arranged in the coal body of a lower layered working face (2); the two roadways on the right side of the upper layered working surface (1) are an upper layered inner roadway (6) and an upper layered outer roadway (7) respectively, and the two roadways on the left side and the right side are communicated through a connecting roadway (8);
s300, performing mining on the upper layered mining face (1), constructing a joint cutting drill hole (9) in advance of the working face in a disposable roadway (3) close to the working face, cutting a roadway roof, weakening the influence of roof stress on an outer roadway, and simultaneously promoting the roof to collapse in time behind the working face, so that roof-contacting incompact during lower layered mining is prevented, and a roadway (4) for reusing on the boundary side is reserved for lower layered mining;
s400, before the lower layered working face (2) is mined, filling the connecting roadway (8) to solve the problems of roof contact and gob conduction when the lower layered working face is mined to the area;
s500, tunneling a roadway of the lower layered working face (2), wherein a roadway does not need to be tunneled again on one side of the boundary side multiplexing roadway (4) in the lower layered working face (2), the boundary side multiplexing roadway (4) is used for ventilation, transportation and pedestrian, and a lower layered working face newly-tunneled roadway (5) is arranged on the other side of the lower layered working face (2);
s600, carrying out mining on the lower layered working face (2).
2. The method of claim 1, wherein the upper hierarchical face lane is reserved as a lower hierarchical face reuse method, and wherein: in the step S200, a coal pillar with a size of 5-50m is left between the two roadways, the section of the roadway is a rectangular section, and the connecting roadway is a gate roadway or an inclined roadway.
3. The method of claim 2, wherein the upper hierarchical face lane is reserved as a lower hierarchical face reuse method, and wherein: in the step S200, in the tunneling process of the upper layered working face, the boundary side multiplexing roadway (4) is arranged in the lower layered working face coal body.
4. The method of claim 3 in which the upper hierarchical face lane is reserved as a lower hierarchical face reuse, characterized in that: in the step S300, the seam cutting and drilling (9) is carried out in a mode of being 30m away from the upper layered stope face in advance, the seam cutting and drilling arrangement mode is that a row of seam cutting and drilling holes are arranged along the axis of a roadway, the seam cutting and drilling arrangement position is close to a top plate on one side of a coal pillar as far as possible according to construction conditions, the drilling construction angle is perpendicular to the top plate or an angle with a certain deviation to the rear of the working face, and the seam cutting and drilling holes weaken the top plate in a blasting and presplitting mode.
5. The method of claim 4, wherein the upper hierarchical face lane is reserved as a lower hierarchical face reuse method, and wherein: in step S400, the communication lane is filled with a high-water material.
6. The method of claim 5, wherein the upper hierarchical face lane is reserved as a lower hierarchical face reuse method, and wherein: in the step S600, in the stoping process, the working face roof conditions are inconsistent, the outside end area is the coal roof, the other areas are false roofs, the management of the working face transition area roof is to be enhanced, the management of the coal pillar roof, the goaf false roof and the transition area support is enhanced, the condition that the tension frame is timely and the initial support force is qualified is ensured, meanwhile, the observation of the mine pressure in the area needs to be enhanced, and the support is timely enhanced in case of abnormality.
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