CN105065001A - Gob-side entrydriving mining method of ultralong-propulsion-distance working face - Google Patents
Gob-side entrydriving mining method of ultralong-propulsion-distance working face Download PDFInfo
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Abstract
The invention discloses a gob-side entrydriving mining method of an ultralong-propulsion-distance working face. The ultralong-propulsion-distance working face adopts double-entry arrangement. The mining method comprises the following steps that: a, in the stope process on a stope working face, gob-side entrydriving is performed in a first coal pillar in the stope direction, so that a gob-side entry is formed in the first coal pillar, wherein the first coal pillar is the coal pillar remained through double-entry arrangement used between the stope working face and a connected working face; and b, after the stope completion of the stope working face and during the stope on the connected working face, the tunneling is continuously carried out to form the gob-side entry, and the connected working face is mined along the gob-side entry during the stope. The mining method provided by the invention has the advantages that the problem of conflict between the gob-side entry and the ultralong-propulsion-distance working face mining is solved; a gob-side entrydriving technology is applied to the mining of the ultralong-propulsion-distance working face; great coal consumption due to adoption of double-entry arrangement is reduced; and the problem that the jump mining is needed by gob-side entrydriving is solved.
Description
Technical field
The present invention relates to the exploitation method of underground mine, particularly relate to a kind of overlength advance distance work plane and adopt two lane to arrange the exploitation method combined with gob side entry driving.
Background technology
Gob side entry driving has high stoping rate, tunnel is easy to safeguard the feature with driving, obtain at home and greatly develop, achieve great successes, the people such as such as remaining loyal woods are to the rational position of high working face gob side entry driving, rational width and excavation tunnel Best Times expand research (Suitable Position of Gob-Side Driving Entry in Large Mining Height Face simulation and application. dig up mine and safety first engineering journal, 2006, 33 (2): 197-200), the people such as Zhang Kexue then further provide deep fractures group gob side entry driving placement technique (determination of deep fractures group gob side entry driving protection pillar rational width. coal journal, 2011, 36 (supplementary issues 1): 28-35).In general, gob side entry driving technology be applied at present comprise thin, in the conventional mine with complex conditions such as the island working face of thick and high seam, deep fractures group and Burst Tendency coal seam.
Those skilled in the art understand, gob side entry driving is the goaf driving stope drift active workings along a upper work plane, the coal column of 3-5m is retained between a general and upper work plane goaf, and the motion of overlying rock needs lasting 1 year even longer time usually, therefore jumping is generally needed to adopt, namely first adopt remote coal seam, after waiting overburden of the goaf motion stabilization, turn around to adopt the region in adjacent goaf again.Adopt if do not jumped, directly tunnel stope drift active workings along a upper work plane goaf and carry out back production, the impact of a work plane overburden of the goaf motion can be subject to, be difficult to the safety ensureing stope drift active workings.
Overlength advance distance work plane typically refers to the work plane that across pitch advance distance reaches more than km, the high-yield and high-efficiency of work plane can be realized owing to extending face advanced distance within the specific limits, reach personnel reduction and enlargement, low consumed object is fallen, be conducive to the development promoting mine height centralized production, therefore also one of developing direction becoming coal mining.But, it will be understood by those skilled in the art that when advance distance is long, air duct and portable blower are difficult to meet air-conditioning requirement usually because driving face needs to utilize portable blower band air duct to carry out air feed to heading end; And for Material Transportation, along with tunnel length increases, the transport difficult of material requested.And if the two lanes of employing are tunneled, as shown in Figure 1, and staying the coal column 5 established to arrange some connection roadways 6, distinguished and admirable loop can formed, tunnel 1 air intake in driving, through connection roadway, from other tunnel 2 return air like this in the process of driving; For haul, equally can from tunnel 3 haul, another tunnel 4 is transported driving and is produced coal (spoil), haul with go out cash and do not interfere with each other, solve transport and tunnel the problem disturbed, so for overlength advance distance work plane, need to adopt two lanes to arrange, with the requirement of satisfied ventilation and assistant conveyance.
In the driving of two lanes, need to stay the coal column establishing large-size between general two stope drift active workings, mainly by the impact of driving with exploitation, because the coal column in the middle of two tunnels that two lane is tunneled needs to experience adopting of first job face, to be also second work plane service subsequently, consider successively experience twice mining influence, two lanes driving ordinary circumstance needs to stay to establish 30m, even larger.Therefore driving Problems existing in two lanes mainly concentrates in pillar size, and pillar size is conducive to greatly driving and the maintenance in tunnel, but loses that coal is many, coal damages serious; And size is little, although high stoping rate, tunnel will experience adopts for twice, and driving is large with maintenance difficulties, even occurs the problem that cannot use.
As the above analysis, for overlength advance distance work plane, in order to ensure the use in tunnel, coal damages serious; If adopt gob side entry driving technology, the transport of ventilation and material cannot be ensured, and need jumping to adopt, there will be island working face.At present, gob side entry driving technology there is no method and is applied in the exploitation of overlength advance distance work plane.
Summary of the invention
The object of the present invention is to provide a kind of gob side entry driving exploitation method of overlength advance distance work plane, arranges comprehensively to solve overlength advance distance work plane two lane the problem that the large and traditional gob side entry driving of the pillar size brought needs jumping to adopt.
For achieving the above object, the present invention is by the following technical solutions:
A gob side entry driving exploitation method for overlength advance distance work plane, described overlength advance distance work plane adopts two lane to arrange, described exploitation method comprises:
A, stope is carried out in the process of back production, gob side entry driving is carried out along mining direction in the first coal column, to form gob side entry in described first coal column, described first coal column for adopt two lane to arrange between described stope and its subsequent duty face stay the coal column established;
B, after described stope back production terminates, when back production is carried out to its subsequent duty face, continue driving and form described gob side entry, and described subsequent duty face is exploited along described gob side entry when back production.
According to exploitation method of the present invention, preferably, the length of overlength advance distance work plane should be greater than make goaf form the distance of sufficient mining (empirically, forming the distance of sufficient mining is 1.2-1.4H
0, wherein, H
0for work plane buried depth), thus be that the gob side entry driving in subsequent duty face creates more stable condition.Further preferably, overlength advance distance work plane is the work plane of length at more than 1000m; More preferably, overlength advance distance work plane is the work plane of length at more than 3000m.
According to exploitation method of the present invention, preferably, described first coal column is lane under the tunnel of described stope side is stope, described first coal column is subsequent duty Mian Shang lane near the tunnel of described stope side, is provided with connection roadway under described stope between lane and subsequent duty Mian Shang lane.
According to exploitation method of the present invention, preferably, in described gob side entry tunneling process, the coal excavated and/or spoil go out via the transport of described subsequent duty Mian Shang lane.
According to exploitation method of the present invention, preferably, when described subsequent duty face back production, at least one connection roadway is there is between the driving position of described gob side entry and the propelling position in described subsequent duty face, in described gob side entry tunneling process, the coal excavated and/or spoil are gone out via the transport of described subsequent duty Mian Shang lane by this connection roadway.
According to exploitation method of the present invention, preferably, the tunnel being arranged in subsequent duty Mian Shang lane is provided with between the propelling position at least one described connection roadway and described subsequent duty face airtight.
According to exploitation method of the present invention, preferably, when gob side entry driving forms described gob side entry, be installed with the second coal column between the goaf that described gob side entry and described stope back production are formed, the width sum of described second coal column and described gob side entry is less than X
0, described in
Wherein, m is that coal seam is adopted thick, unit m; λ is coefficient of horizontal pressure;
for the angle of internal friction in coal seam; C
0for the cohesive strength of coal seam interface; K is the factor of stress concentration; γ is rock stratum volume-weighted average; H is tunnel buried depth; P
zfor the Support Resistance of coal side, unit kN.
According to exploitation method of the present invention, preferably, it is characterized in that, in the process of described stope back production, when starting to tunnel described gob side entry after described stope back production at least T days, and the distance that the back production position of described stope is ahead of the driving position of described gob side entry is at least L
1;
Described L
1=T × v, described in
Wherein, v is the drawing speed of described stope; E is the modulus of elasticity of base object model rock beam; η is the loss moduli of base object model rock beam; q
zfor the load on rock beam top; L
mfor base object model rock beam broken mechanics; R is the compressive strength of broken swollen rock, unit N/ ㎡; H is thick for adopting, unit m; k
cthe broken swollen coefficient of remnants for caved gangue; m
zfor immediate roof thickness, unit m.
According to exploitation method of the present invention, preferably, in the process of described subsequent duty face back production, the distance that the driving position of described gob side entry is ahead of the propelling position in described subsequent duty face is greater than L
2, described L
2for the advanced mining influence distance during back production of subsequent duty face; It will be appreciated by those skilled in the art that, for adjacent two work planes, its advanced mining influence distance is usually suitable, therefore, advanced mining influence distance when described L2 also can be stope back production, by obtaining field measurement during stope back production.
Compared with prior art, there is following advantage in exploitation method of the present invention:
1, two lane is adopted to tunnel the Coal Loss caused for overlength advance distance work plane large, the problem of roadway maintenance difficulty, the edge that the present invention first proposed overlength advance distance work plane two lanes driving is empty along adopting technology, Ji Shuan lane arrange stay in the coal column established and carry out gob side entry driving along mining direction, solve the contradiction between gob side entry driving and overlength advance distance working face mining, gob side entry driving technology is applied in the exploitation of overlength advance distance work plane, decrease a large amount of coals caused owing to needing to adopt two lanes to arrange to damage and solve the jumping of gob side entry driving needs and adopt and cause the problem of island working face.
2, adopt exploitation method of the present invention, subsequent duty Mian Shang lane only experiences driving and the mining influence of described stope, scraps between the productive life of subsequent duty face by mining influence section, and entirety is not by secondary mining influence; And gob side entry tunnels along goaf, the mining influence in experience driving and subsequent duty face, therefore driving and the impact of once adopting are only born in gob side entry and subsequent duty Mian Shang lane, thus make the maintenance in tunnel more simple; Under the stope of simultaneously Yuan Shuan lane driving, lane and subsequent duty Mian Shang lane are not all wasted, and ensure that overlength dash and assistant conveyance.
Accompanying drawing explanation
Fig. 1 is that schematic diagram is arranged in two lanes of overlength advance distance work plane in prior art;
Fig. 2 is the back production schematic diagram of stope in exploitation method of the present invention;
Fig. 3 is the stress distribution schematic diagram of exploiting field above cross section, A-A place and side, subsequent duty face;
Fig. 4 is the back production schematic diagram in subsequent duty face in exploitation method of the present invention;
Fig. 5 is the distribution curve of stress figure in embodiment above side, subsequent duty face;
Fig. 6 is that in embodiment, secondary adopts rear tunnel deformation curve figure.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail, but the present invention is not limited to this.
Overlength advance distance work plane involved in exploitation method of the present invention is concept well-known to those skilled in the art, in the present invention, preferably, the length of overlength advance distance work plane should be greater than the distance making goaf formation sufficient mining, and (distance empirically, forming sufficient mining is 1.2-1.4H
0, wherein, H
0for work plane buried depth), thus be that the gob side entry driving in subsequent duty face creates more stable condition.Further preferably, overlength advance distance work plane is the work plane of length at more than 1000m; More preferably, overlength advance distance work plane is the work plane of length at more than 3000m.
Described overlength advance distance work plane adopts two lane to arrange, as shown in Figure 2, for the ease of understanding and explanation, the overlength advance distance work plane that two of adopting two lanes to arrange are adjacent is only shown in Fig. 2, be respectively stope and its subsequent duty face, it will be appreciated by those skilled in the art that, in actual production, a certain fixing work plane is not refered in particular in stope and subsequent duty face, and refer to the work plane just exploited in multiple work plane, and, and the work plane that can stope back production complete after then exploit adjacent with stope.But, for convenience of explanation and understand, for the work plane of two shown in Fig. 2, stope and subsequent duty face will be called respectively regularly.
In addition, arrange owing to adopting two lane, the tunnel formed is more, for the ease of understanding and explanation, in the present invention, stope is called lane under stope by the tunnel (also i.e. described first coal column by the tunnel of described stope side) of described first coal column side, the tunnel of stope opposite side is called lane on stope; In like manner, leaned in subsequent duty face the tunnel of described first coal column side (also namely described first coal column leans on the tunnel of side, described subsequent duty face) to be called subsequent duty Mian Shang lane, the tunnel of subsequent duty face opposite side is called subsequent duty Mian Xia lane.
As shown in Figure 2, exploitation method of the present invention comprises a, carries out in the process of back production to stope 21, gob side entry driving is carried out along mining direction in the first coal column 23, to form gob side entry 24 in described first coal column 23, described first coal column 23 for adopt two lane to arrange between described stope 21 and its subsequent duty face 22 stay the coal column established.
Wherein, under stope, between lane 25 and subsequent duty Mian Shang lane 26, be provided with connection roadway 27, can exchange better between Shuan Xiang to make goods and materials and air-flow.It will be understood by those skilled in the art that the connection roadway for temporarily not using in exploitation process, tunnel airtight (for making accompanying drawing more clear, in figure of the present invention and not shown this kind of tunnel is airtight) can be set wherein, to avoid interference pneumatic convey.
When described stope 21 is exploited, it ventilates and transport can be carried out in ventilation when traditionally two lane is arranged and transport.Preferably, in described gob side entry 24 tunneling process, the coal excavated and/or spoil transport via described subsequent duty Mian Shang lane 26, utilize the connection roadway between subsequent duty Mian Shang lane 26 to keep good ventilation.In a specific embodiment, before driving gob side entry 24, first another tunnel 29 in the described subsequent duty Mian Xia lane 28 (in two lane) of driving and two lane is arranged by two lane, tunnel to direction, described subsequent duty face 22 location of starting cut 30 backward described stope 21 goaf, and arrive gob side entry driving position through subsequent duty Mian Shang lane 26, in described stope 21 exploitation process, tunnel out gob side entry 24.
Stay the first coal column 23 established between lane 25 and subsequent duty Mian Shang lane 26 under it will be understood by those skilled in the art that stope, the mining influence of described stope 21 can be subject to.Wherein, after described stope 21 forms goaf, as shown in Figure 3, four stress distribution districts can be formed: fracture area I, plastic zone II, elastic region stress raised portion III and initial stress area IV in side, subsequent duty face 22, consider that the effect in subsequent duty Mian Shang lane 26 is to meet two lanes driving and secondary ventilation, and can as the air return way of described stope 21, therefore, what the adopting of stope 21 determined that it safeguards is difficult to degree.Easily safeguard for making described subsequent duty Mian Shang lane 26, preferably described subsequent duty Mian Shang lane 26 is arranged in described initial stress area, both ensure safety, and combine gob side entry driving technology due to exploitation method of the present invention, therefore serious without the need to worrying that coal damages again.Wherein, the border of initial stress area and elastic region stress raised portion can according to document " coal column carries, subregion and subsequent duty face base object model mechanical model and computational analysis " (Wang Zhiqiang, Gao Yang, Ding Ziwei etc. coal column carrying, subregion and subsequent duty face base object model mechanical model and computational analysis [J]. coal engineering, 2013, disclosed in method (also namely calculate the method for advanced mining influence distance) determine, here repeats no more Vol.1 (1): 79-82.); Or, it will be appreciated by those skilled in the art that, can determine the border of initial stress area and elastic region stress raised portion according to the advanced mining influence distance of surveying during stope back production, namely advanced mining influence distance is the distance between initial stress area and goaf.
When gob side entry driving forms described gob side entry 24, the second coal column 31 is installed with between the goaf formed after described gob side entry 24 and described stope 21 back production, preferably, in the low stress area formed after described gob side entry 24 is arranged in the back production of described stope 21, namely the width sum of described second coal column and described gob side entry is less than X
0, described in
Wherein, m is that coal seam is adopted thick, unit m; λ is coefficient of horizontal pressure;
for the angle of internal friction in coal seam; C
0for the cohesive strength of coal seam interface; K is the factor of stress concentration; γ is rock stratum volume-weighted average; H is tunnel buried depth; P
zfor the Support Resistance of coal side, unit kN.
Wherein, the span length of the gob side entry driving that the width of described gob side entry 24 can be conventional in this area, such as 5 meters.
In the present invention, for making the maintenance of described gob side entry 24 more simple, preferably, the present invention also makes full use of the feature that work plane is overlength advance distance work plane, in the process of described stope 21 back production, when starting to tunnel described gob side entry 24 after the back production of described stope 21 at least T days, and the distance that the back production position of described stope 21 is ahead of the driving position of described gob side entry 24 is at least L
1;
Described L
1=T × v, described in
Wherein, v is the drawing speed of described stope; E is the modulus of elasticity of base object model rock beam; η is the loss moduli of base object model rock beam; q
zfor the load on rock beam top; L
mfor base object model rock beam broken mechanics; R is the compressive strength of broken swollen rock, unit N/ ㎡; H is thick for adopting, unit m; k
cthe broken swollen coefficient of remnants for caved gangue; m
zfor immediate roof thickness, unit m.
Thus, when described gob side entry 24 tunnels, the mining influence of the stope 21 that it is subject to is less.
As shown in Figure 4, exploitation method of the present invention also comprises b, after the back production of described stope 21 terminates, when carrying out back production to its subsequent duty face 22, continue driving and form described gob side entry 24, and described subsequent duty face 22 is exploited along described gob side entry 24 when back production.
Preferably, when described subsequent duty face 22 back production, at least one connection roadway 27 is there is between the driving position of described gob side entry 24 and the propelling position in described subsequent duty face 22, in described gob side entry 24 tunneling process, the coal excavated and/or spoil are transported via described subsequent duty Mian Shang lane 25 by this connection roadway 27.Meanwhile, in the tunneling process of described gob side entry 24, the tunnel in this connection roadway and subsequent duty face can be utilized to keep good ventilation.
In a preferred embodiment of the present invention, the tunnel airtight 32 being arranged in subsequent duty Mian Shang lane 26 is provided with between at least one described connection roadway 27 and the propelling position in described subsequent duty face 22.Thus, described gob side entry 24 not only can be made to ventilate more good, the part tunnel in subsequent duty Mian Shang lane 26 can be safeguarded simultaneously, by closed processes, ensure safety.
In the present invention, for making the maintenance of described gob side entry 24 more simple further, preferably, in the process of described subsequent duty face 22 back production, the distance that the driving position of described gob side entry 24 is ahead of the propelling position in described subsequent duty face 22 is at least L
2; Described L
2for the advanced mining influence distance during back production of subsequent duty face; It will be appreciated by those skilled in the art that, for adjacent two work planes, its advanced mining influence distance is usually suitable, therefore, advanced mining influence distance when described L2 also can be stope back production, by obtaining field measurement during stope back production; Or according to above-mentioned document " coal column carrying, subregion and subsequent duty face base object model mechanical model and computational analysis " (Wang Zhiqiang, Gao Yang, Ding Ziwei etc. coal column carrying, subregion and subsequent duty face base object model mechanical model and computational analysis [J]. coal engineering, disclosed in method determine 2013, Vol.1 (1): 79-82.).
Exploitation method of the present invention is on the basis that overlength advance distance work plane adopts two lane to arrange, gob side entry driving in coal column further between stope 21 and its subsequent duty face 22, form gob side entry 24, thus can exploit along gob side entry 24 when its subsequent duty face 22 is exploited.Certainly, it will be appreciated by those skilled in the art that, multiple (being such as greater than 5 or 10) work plane is side by side typically provided with when coal mining, therefore, in actual production, stope described herein not refers in particular to a certain fixing work plane, and refer to the work plane waiting for exploitation in multiple work plane, a certain stationary face is equally not refered in particular in described subsequent duty face, and refers to stope adjacent, and the work plane then can exploited after stope completes back production.Therefore, in actual production, a upper work plane (i.e. former stope) back production when former subsequent duty face just can become new stope after completing, and so repeats, thus makes exploitation method of the present invention can repeat to be implemented on above-mentioned multiple work planes.
Gob side entry driving technology is incorporated in the exploitation of the overlength advance distance work plane that Liao Shuan lane is arranged by the present invention dexterously, and all working face all can realize order mining, not only avoid traditional double lane and arrange the serious coal damage that institute is difficult to avoid, also successfully solve gob side entry driving production technique to need to jump the drawback of adopting, kill two birds with one stone, achieve overlength advance distance work plane two lanes placement technique that usually can not simultaneously adopt to be combined with the advantage of gob side entry driving, and the maintenance in tunnel can be made more simple.For this technology, inventor is also by empty along adopting technology for the edge of two for its called after overlength advance distance work plane lanes driving.
In addition, by following examples, those skilled in the art can understand the extremely huge economic benefit of technical advantage of the present invention further.
Embodiment
Examine and breathe out exploitation 3-1 coal seam, exploiting field, plain colliery 31, coal seam thickness 2.05-7.15m, average out to 5.25m, coal seam mean obliquity is 1 °, and geological structure is simple, is monoclinal structure.The stope of research is positioned in the middle part of 31 exploiting fields, and work plane tendency length 300m, advances length 5000m, and adopt two lane to arrange, stay the coal column clear span 18.42m established between two lane, open a connection roadway every 60-70m, twice mining influence is stood in reserved coal pillar and tunnel.
Side direction (i.e. the direction in the subsequent duty face) stress distribution in the goaf of stope is surveyed, once adopting in (stope exploitation) situation, peak stress point distance goaf 25m, peak-peak 22.94MPa, concrete stress distribution situation is shown in that Fig. 5 (wherein, abscissa is the distance between side, subsequent duty face and goaf, ordinate is roof Stress), there is the situation that top coal drops, wire lath ruptures and secondary side wire lath destroys in actual exploitation inter-road road.
Between the productive life of subsequent duty face, advanced pressure peak region increases to 30-50m scope, and advanced mining influence when surveying stope back production is apart from being 144m, and within the scope of the 80m of rib front, end distension is serious, is just helping wall caving serious, and the shoulder nest extruding of secondary side forms pendant pocket.Broken in the middle part of the top board of local, sink.Connection roadway is when apart from work plane 30m, and end distension starts aggravation, distension height about 1.5m at the bottom of the most serious location, and as shown in Figure 6, wherein, abscissa is the distance between the propelling position in tunnel and subsequent duty face to secondary mining induced roadway deformation,
for the distance between the roof and floor of tunnel,
for the distance between roadway's sides.
From field measurement, the former two lanes of the 18.46m coal column established of staying are tunneled, and assistant conveyance crossheading is subject to maintenance generation moderate finite deformation and the destruction of a mining influence, under secondary mining influence, cannot meet use.
On this basis, propose to adopt of the present invention pair of lane driving gob side entry along the arrangement adopted.Relevant parameter is chosen for:
According to bearing stress distribution work as executed drawing 5, determine that the first coal column stays and set width A still as 40m (being in initial stress area), the second coal column B gets 5m, and (gob side entry width is 5m, now X
0be about 25m), wherein: work plane buried depth 400m, E=53.9GN/m
2, η=4.5GPa, R=45kN/m
2, k
c=1.1, q
z=10MPa, h=2.23m, m
z=5.2m, L
m=17m, v=10m/d.
Thus, in the process of described stope back production, when described stope back production starts after at least 143 days to tunnel described gob side entry, and the distance that the back production position of described stope is ahead of the driving position of described gob side entry is at least 1430m;
Between the productive life of subsequent duty face, the distance that the driving position of described gob side entry is ahead of the propelling position in described subsequent duty face is at least 144m; .
In whole recovery process, there is not gross distortion in the tunnel of use, safeguards simple; And due to final remaining coal column, to be only 5m wide, and economic benefit clearly.
Claims (8)
1. a gob side entry driving exploitation method for overlength advance distance work plane, described overlength advance distance work plane adopts two lane to arrange, described exploitation method comprises:
A, stope is carried out in the process of back production, gob side entry driving is carried out along mining direction in the first coal column, to form gob side entry in described first coal column, described first coal column for adopt two lane to arrange between described stope and its subsequent duty face stay the coal column established;
B, after described stope back production terminates, when back production is carried out to its subsequent duty face, continue driving and form described gob side entry, and described subsequent duty face is exploited along described gob side entry when back production.
2. exploitation method as claimed in claim 1, it is characterized in that, described first coal column is lane under the tunnel of described stope side is stope, described first coal column is subsequent duty Mian Shang lane near the tunnel of side, described subsequent duty face, is provided with connection roadway under described stope between lane and subsequent duty Mian Shang lane.
3. exploitation method as claimed in claim 2, is characterized in that, in described gob side entry tunneling process, the coal excavated and/or spoil go out via the transport of described subsequent duty Mian Shang lane.
4. exploitation method as claimed in claim 3, it is characterized in that, when described subsequent duty face back production, at least one connection roadway is there is between the driving position of described gob side entry and the propelling position in described subsequent duty face, in described gob side entry tunneling process, the coal excavated and/or spoil are gone out via the transport of described subsequent duty Mian Shang lane by this connection roadway.
5. exploitation method as claimed in claim 4, is characterized in that, be provided with the tunnel being arranged in subsequent duty Mian Shang lane airtight between the propelling position at least one described connection roadway and described subsequent duty face.
6. the exploitation method according to any one of claim 1-5, it is characterized in that, when gob side entry driving forms described gob side entry, be installed with the second coal column between the goaf formed after described gob side entry and described stope back production, the width sum of described second coal column and described gob side entry is less than X
0, described in
Wherein, m is that coal seam is adopted thick, unit m; λ is coefficient of horizontal pressure;
for the angle of internal friction in coal seam; C
0for the cohesive strength of coal seam interface; K is the factor of stress concentration; γ is rock stratum volume-weighted average; H is tunnel buried depth; P
zfor the Support Resistance of coal side, unit kN.
7. the exploitation method according to any one of claim 1-5, it is characterized in that, in the process of described stope back production, when starting to tunnel described gob side entry after described stope back production at least T days, and the distance that the back production position of described stope is ahead of the driving position of described gob side entry is at least L
1;
Described L
1=T × v, described in
Wherein, v is the drawing speed of described stope; E is the modulus of elasticity of base object model rock beam; η is the loss moduli of base object model rock beam; q
zfor the load on rock beam top; L
mfor base object model rock beam broken mechanics; R is the compressive strength of broken swollen rock, unit N/ ㎡; H is thick for adopting, unit m; k
cthe broken swollen coefficient of remnants for caved gangue; m
zfor immediate roof thickness, unit m.
8. the exploitation method according to any one of claim 1-5, is characterized in that, in the process of described subsequent duty face back production, the distance that the driving position of described gob side entry is ahead of the propelling position in described subsequent duty face is at least L
2, described L
2for advanced mining influence distance during stope back production.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510463081.3A CN105065001B (en) | 2015-07-31 | 2015-07-31 | A kind of gob side entry driving recovery method of overlength advance distance working face |
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| CN201510463081.3A CN105065001B (en) | 2015-07-31 | 2015-07-31 | A kind of gob side entry driving recovery method of overlength advance distance working face |
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| CN106014413A (en) * | 2016-07-12 | 2016-10-12 | 中国矿业大学(北京) | Method for implementing combined supporting on goaf-along driven roadway and adjacent roadway in thick coal layer |
| CN106761746A (en) * | 2016-11-29 | 2017-05-31 | 安徽理工大学 | A kind of method for determining island working face reserved coal pillar rational width |
| CN107905807A (en) * | 2017-12-13 | 2018-04-13 | 陕西煤业化工技术研究院有限责任公司 | A kind of future small coal pillar comprehensive mechanical coal mining supporting construction and construction method |
| CN109798116A (en) * | 2019-04-04 | 2019-05-24 | 中国矿业大学(北京) | Realize double-vane arrangement working face exploiting field or zone entirely without coal column method |
| CN110306983A (en) * | 2019-06-15 | 2019-10-08 | 龙口矿业集团有限公司 | A kind of corner pillar face recovery method in exploiting field |
| CN110886611A (en) * | 2019-12-06 | 2020-03-17 | 河南力行科创矿山技术开发有限公司 | Gob-side entry driving process for high-gas large-mining-height working face |
| CN111119903A (en) * | 2019-12-16 | 2020-05-08 | 西安中铁工程装备有限公司 | Method for gob-side entry driving of coal mine |
| CN112483090A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | Method for preventing and controlling rock burst under three-dimensional coal pillar |
| CN114109386A (en) * | 2021-12-10 | 2022-03-01 | 国家能源投资集团有限责任公司 | Underground coal mining working face regulating and controlling method |
| CN115839249A (en) * | 2023-01-16 | 2023-03-24 | 煤炭科学技术研究院有限公司 | Method for arranging ultra-long working face double-measure roadway under sequential mining condition |
| CN117027954A (en) * | 2023-09-19 | 2023-11-10 | 山东能源集团有限公司 | System and method for monitoring overlying strata and coal pillars of roof of gob-side entry |
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| CN106014413A (en) * | 2016-07-12 | 2016-10-12 | 中国矿业大学(北京) | Method for implementing combined supporting on goaf-along driven roadway and adjacent roadway in thick coal layer |
| CN106761746A (en) * | 2016-11-29 | 2017-05-31 | 安徽理工大学 | A kind of method for determining island working face reserved coal pillar rational width |
| CN107905807A (en) * | 2017-12-13 | 2018-04-13 | 陕西煤业化工技术研究院有限责任公司 | A kind of future small coal pillar comprehensive mechanical coal mining supporting construction and construction method |
| CN109798116B (en) * | 2019-04-04 | 2022-04-01 | 中国矿业大学(北京) | Method for realizing complete coal pillar-free mining area or belt area of double-wing arrangement working face |
| CN109798116A (en) * | 2019-04-04 | 2019-05-24 | 中国矿业大学(北京) | Realize double-vane arrangement working face exploiting field or zone entirely without coal column method |
| CN110306983A (en) * | 2019-06-15 | 2019-10-08 | 龙口矿业集团有限公司 | A kind of corner pillar face recovery method in exploiting field |
| CN110886611A (en) * | 2019-12-06 | 2020-03-17 | 河南力行科创矿山技术开发有限公司 | Gob-side entry driving process for high-gas large-mining-height working face |
| CN110886611B (en) * | 2019-12-06 | 2020-12-25 | 河南力行科创矿山技术开发有限公司 | Gob-side entry driving process for high-gas large-mining-height working face |
| CN111119903A (en) * | 2019-12-16 | 2020-05-08 | 西安中铁工程装备有限公司 | Method for gob-side entry driving of coal mine |
| CN112483090A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | Method for preventing and controlling rock burst under three-dimensional coal pillar |
| CN114109386A (en) * | 2021-12-10 | 2022-03-01 | 国家能源投资集团有限责任公司 | Underground coal mining working face regulating and controlling method |
| CN114109386B (en) * | 2021-12-10 | 2023-09-19 | 国家能源投资集团有限责任公司 | Underground coal mining working face regulating and controlling method |
| CN115839249A (en) * | 2023-01-16 | 2023-03-24 | 煤炭科学技术研究院有限公司 | Method for arranging ultra-long working face double-measure roadway under sequential mining condition |
| CN115839249B (en) * | 2023-01-16 | 2023-04-18 | 煤炭科学技术研究院有限公司 | Method for arranging ultra-long working face double-measure roadway under sequential mining condition |
| CN117027954A (en) * | 2023-09-19 | 2023-11-10 | 山东能源集团有限公司 | System and method for monitoring overlying strata and coal pillars of roof of gob-side entry |
| CN117027954B (en) * | 2023-09-19 | 2024-06-21 | 山东能源集团有限公司 | System and method for monitoring overlying strata and coal pillars of roof of gob-side entry |
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