CN104484492A - Method of evaluating section extraction connection rationality via gas extraction data step type - Google Patents

Method of evaluating section extraction connection rationality via gas extraction data step type Download PDF

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Publication number
CN104484492A
CN104484492A CN201410608331.3A CN201410608331A CN104484492A CN 104484492 A CN104484492 A CN 104484492A CN 201410608331 A CN201410608331 A CN 201410608331A CN 104484492 A CN104484492 A CN 104484492A
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extraction
drill site
standby
standard
gas
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CN104484492B (en
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赵旭生
邹云龙
文光才
张庆华
邓敢博
何亚波
刘文杰
唐韩英
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Chongqing Research Institute Co Ltd of China Coal Technology and Engineering Group
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Chongqing Research Institute Co Ltd of China Coal Technology and Engineering Group
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Abstract

The invention discloses a method of evaluating section extraction connection rationality via gas extraction data step type, and the method includes: (1) obtaining the drill site gas extraction pure amount data, the drill site characteristic parameter, drill site extraction duration, coal seam gas geology information, drill site control range gas storage amount Q1, working face average daily Y1 and spare working face average daily Y2; (2) obtaining the working face residue yield Y, the spare working face section coal reserve M1 and the spare working face gas reserve Q1; (3) calculating the protection connection time of the sections of the spare working face through Y1, Y2, v and M1; (4) calculating the relationship between drill amount and extraction time of each section of the spare working face via the rill site control range gas extraction effect, M1 and Q1; and (5) evaluating the extraction connection rationality of each section of the spare working face via the drill amount of the section of spare working face, extraction time relationship and the production connection time of each section of spare working face. The step type design can offer more reasonable extraction design according to different gas geology and different construction time, the security of section with high gas and low extraction time is raised and the engineering waste for the section with low gas and high extraction time is reduced.

Description

Utilize gas pumping data step type to evaluate section extraction and be connected rational method
Technical field
The present invention relates to a kind of gas pumping and be connected Rationality Assessment method, particularly utilize gas pumping data step type to evaluate section extraction and be connected rational method.
Background technology
The existing gas pumping design in current colliery, extraction are connected design, engineering construction major part has all been come according to mine self need of production, and extraction evaluation itself is only for meeting a tables of data of need of production.This coalbed gas geology information and the production time not considering construction location reality, and there is the waste of great engineering in the blindness design and construction carried out, also there is great potential safety hazard.Adopt step type extraction evaluation method can take more effective job design according to the difference of construction location coalbed gas geology information, production practices.Such as, a lot of workplace tendency length, more than 2000 meters, cuts a position gas bearing capacity 12m 3/ t, workplace is first section gas bearing capacity 10m from opening 3/ t, the construction engineering time is later than to cut after eye 200 days, at this moment, first section extraction borehole job design can be obviously sparse in cutting eye, or cutting eye should be intensive in first section, but all places job design is all the same often in the work progress of reality, serious cutout portion engineering waste or incisor canal is caused to there is hidden danger.
Summary of the invention
Given this, the invention provides and utilize the extraction of gas pumping data step type evaluation section to be connected rational method, the object of the invention is to be realized by such technical scheme, utilize gas pumping data step type to evaluate section extraction and be connected rational method, comprise the steps:
1) drill site gas pumping scale data X is obtained t, drill site characteristic parameter C 1, drill site extraction duration T 1, coal-bed gas geological information, drill site range of control gas reserves Q 1, the average daily output Y of workplace 1output Y average daily with standby face 2;
2) standby face being divided into n section from cutting eye to opening direction, utilizing coalbed gas geology acquisition of information workplace to remain output Y, standby face section coal reserves M 1with standby face gas reserves Q 1;
3) Y is utilized 1, Y 2, Y, M 1calculate standby face each section faces replacement time;
4) drill site range of control gas pumping effect, M is utilized 1, Q 1calculate each section extraction of standby face and bore dipstick metering and extraction time relationship;
5) extraction of standby face each section is utilized to bore dipstick metering, extraction time relationship and standby face each section faces replacement Time evaluation standby face each section extraction connection and balance.
Further, described standby face gas reserves Q 1be specially:
Described standby face section coal reserves M 1be specially:
Wherein W 1---standby face section gas bearing capacity, m 3/ t; ρ---coal body unit weight, t/m 3; σ---area trace unit, m 2; H---coal is thick, m; M 1---standby face section coal reserves, t; D represents curve surface integral.
Further, standby face each section faces replacement time is specially:
T i = Y Y 1 + Σ i = 1 n M i - 1 1 Y 2 - - - ( 3 )
In formula ---standby face i-th-1 section coal reserves, i-1>=0, t; T i---standby face i-th section faces replacement time, d.
Further, step 4) be specially, 1. utilize drill site gas pumping scale data X tcalculate drill site extraction cumulative amount and development trend thereof, development trend utilizes the mode process of numerical fitting;
Q tduring for accumulative extraction amount:
Q t = Σ t = 0 t = i X t - - - ( 4 )
In formula
X t---drill site gas pumping scale, m 3/ min; Q t---drill site gas pumping total amount, m 3; T---the extraction time; 2. the maximum gas bearing capacity in drill site range of control and drill site range of control extraction critical value up to standard is utilized to calculate drill site range of control extraction cumulative amount Q up to standard c;
Q c = ( W 0 max - W ′ ) · ρ · ∫ ∫ D h · dσ - - - ( 5 )
W in formula 0max---the maximum gas bearing capacity in drill site range of control, m 3/ t;
W '-drill site extraction critical value up to standard, m 3/ t;
3. drill site extraction cumulative amount and development trend and drill site range of control extraction cumulative amount up to standard thereof is utilized to calculate drill site range of control extraction effect up to standard;
Q tduring for accumulative extraction amount: Q t>=Q c, extraction is up to standard, otherwise extraction is not up to standard, t1 is extraction reaching standard time;
C 1=L 1·t 1(6)
C in formula 1, L 1---drill site characteristic parameter;
Or step 4) be specially, 1. utilize drill site gas pumping scale data X tcalculate drill site extraction cumulative amount and development trend thereof, development trend utilizes the mode process of numerical fitting;
Q tduring for estimating extraction amount:
Q t=f(t) (7)
T is the extraction time;
2. the maximum gas bearing capacity in drill site range of control and drill site range of control extraction critical value up to standard is utilized to calculate drill site range of control extraction cumulative amount Q up to standard c;
Q c = ( W 0 max - W ′ ) · ρ · ∫ ∫ D h · dσ - - - ( 8 )
In formula
W 0max---the maximum gas bearing capacity in drill site range of control, m 3/ t; W '-drill site extraction critical value up to standard, m 3/ t;
3. drill site extraction cumulative amount and development trend and drill site range of control extraction cumulative amount up to standard thereof is utilized to calculate drill site range of control extraction effect up to standard;
Q tduring for estimating extraction amount: Q t>=Q c, extraction is up to standard, otherwise extraction is not up to standard, t 2for estimating extraction reaching standard time;
C 2=L 1·t 2(9)
L in formula 1, C 2---drill site characteristic parameter.
Further, following methods is adopted to obtain to described standby face each section extraction connection and balance:
Q c ′ = ( W 0 max 1 - W ′ ′ ) · ρ · ∫ ∫ D h · dσ - - - ( 11 )
In formula ---the maximum gas bearing capacity of standby face i-th section, m 3/ t; W "---standby face i-th section extraction critical value up to standard, m 3/ t; Q ' c---standby face i-th section extraction cumulative amount up to standard, m 3;
Q c Q c ′ = L 1 · t 2 L i · t i - - - ( 11 )
L in formula i---standby face i-th section drill site characteristic parameter; t i---standby face i-th section is found time in advance, d;
Work as t i≤ T ithen extraction connection and balance; Otherwise extraction is connected uneven, increases L when extraction is connected uneven i, reduce t i.
Owing to have employed technique scheme, the present invention has following advantage:
(1) step type extraction design according to different coalbed gas geology, different engineering time, can propose more reasonably extraction design, adds the security of high methane, low extraction time section, decreases the engineering waste of present low gas, high extraction time section.
(2) step type extraction design reacted engineering construction amount more really and accurately, for mine more science arrangement produce carried direction.
Accompanying drawing explanation
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail, wherein:
Fig. 1 evaluates section extracting result method route figure for utilizing drill site extraction monitor data.
Embodiment
Below with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail; Should be appreciated that preferred embodiment only in order to the present invention is described, instead of in order to limit the scope of the invention.
Utilize gas pumping data step type to evaluate section extraction and be connected rational method, comprise the steps:
1) drill site gas pumping scale data X is obtained t, drill site characteristic parameter C 1, drill site extraction duration T 1, coal-bed gas geological information, drill site range of control gas reserves Q 1, the average daily output Y of workplace 1output Y average daily with standby face 2; Drill site extraction duration T 1refer to that any one is with reference to the drill site range of control extraction required time up to standard, extraction is up to standard refers to that drill site range of control arbitrfary point gas bearing capacity is no more than 8m 3/ t, page can be investigated according to authoritative institution and determine that a value is as value up to standard.
2) standby face being divided into n section from cutting eye to opening direction, utilizing coalbed gas geology acquisition of information workplace to remain output Y, standby face section coal reserves M 1with standby face gas reserves Q 1;
Described standby face gas reserves Q 1be specially:
Described standby face section coal reserves M 1be specially:
Wherein W 1---standby face section gas bearing capacity, m 3/ t; ρ---coal body unit weight, t/m 3; σ---area trace unit, m 2; H---coal is thick, m; M 1---standby face section coal reserves, t; D represents curve surface integral.
3) Y is utilized 1, Y 2, Y, M 1calculate standby face each section faces replacement time;
Standby face each section faces replacement time is specially:
T i = Y Y 1 + Σ i = 1 n M i - 1 1 Y 2 - - - ( 3 )
In formula ---standby face i-th-1 section coal reserves, i-1>=0, t; T i---standby face i-th section faces replacement time, d.
4) drill site range of control gas pumping effect, M is utilized 1, Q 1calculate each section extraction of standby face and bore dipstick metering and extraction time relationship; Be specially,
1. drill site extraction scale data X is utilized tcalculate drill site extraction cumulative amount and development trend thereof, development trend utilizes the mode process of numerical fitting;
Q tduring for accumulative extraction amount:
Q t = Σ t = 0 t = i X t - - - ( 1 )
Q tduring for estimating extraction amount:
Q t=f(t) (2)
X in formula t---drill site gas pumping scale, m 3/ min;
Q t---drill site gas pumping total amount, m 3.
T is the extraction time, this extraction time be according to the different condition of drill site time of calculating out
2. coalbed gas geology acquisition of information drill site range of control gas reserves and drill site range of control extraction critical value up to standard is utilized to calculate drill site range of control extraction cumulative amount up to standard;
Q c = ( W 0 max - W ′ ) · ρ · ∫ ∫ D h · dσ - - - ( 3 )
W in formula 0max---the maximum gas bearing capacity in drill site range of control, m 3/ t;
W '---drill site extraction critical value up to standard, m 3/ t;
Q c---boring range of control extraction cumulative amount up to standard, m 3.
3. drill site extraction cumulative amount and development trend and drill site range of control extraction cumulative amount up to standard thereof is utilized to calculate drill site range of control extraction effect up to standard;
Q tduring for accumulative extraction amount: Q t>=Q c, extraction is up to standard, otherwise extraction is not up to standard, t 1for extraction reaching standard time.
C 1=L 1·t 1(5)
Q tduring for estimating extraction amount: Q t>=Q c, extraction is up to standard, otherwise extraction is not up to standard, t 2for estimating extraction reaching standard time.
C 2=L 1·t 2(6)
C in formula 1, L 1, C 2---drill site characteristic parameter.
5) utilize the extraction of standby face each section to bore dipstick metering, extraction time relationship and standby face each section faces replacement Time evaluation standby face each section extraction connection and balance, be specially:
Q c ′ = ( W 0 max 1 - W ′ ′ ) · ρ · ∫ ∫ D h · dσ - - - ( 10 )
In formula ---the maximum gas bearing capacity of standby face i-th section, m 3/ t; W "---standby face i-th section extraction critical value up to standard, m 3/ t; Q ' c---standby face i-th section extraction cumulative amount up to standard, m 3;
Q c Q c ′ = L 1 · t 2 L i · t i - - - ( 11 )
L in formula i---standby face i-th section drill site characteristic parameter; t i---standby face i-th section is found time in advance, d;
Work as t i≤ T ithen extraction connection and balance; Otherwise extraction is connected uneven, increases L when extraction is connected uneven i, reduce t i.
Step type extraction design of the present invention according to different coalbed gas geology, different engineering time, can propose more reasonably extraction design, adds the security of high methane, low extraction time section, decreases the engineering waste of present low gas, high extraction time section.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims (6)

1. utilize gas pumping data step type to evaluate section extraction and be connected rational method, it is characterized in that: comprise the steps:
1) drill site gas pumping scale data X is obtained t, drill site characteristic parameter C 1, drill site extraction duration T 1, coal-bed gas geological information, drill site range of control gas reserves Q 1, the average daily output Y of workplace 1output Y average daily with standby face 2;
2) standby face being divided into n section from cutting eye to opening direction, utilizing coalbed gas geology acquisition of information workplace to remain output Y, standby face section coal reserves M 1with standby face gas reserves Q 1;
3) Y is utilized 1, Y 2, Y, M 1calculate standby face each section faces replacement time;
4) drill site range of control gas pumping time, M is utilized 1, Q 1calculate each section extraction of standby face and bore dipstick metering and extraction time relationship;
5) extraction of standby face each section is utilized to bore dipstick metering, extraction time relationship and standby face each section faces replacement Time evaluation standby face each section extraction connection and balance.
2. according to claim 1ly utilize gas pumping data step type to evaluate section extraction to be connected rational method, to it is characterized in that:
Described standby face gas reserves Q 1be specially:
Described standby face section coal reserves M 1be specially:
Wherein W 1---standby face section gas bearing capacity, m 3/ t; ρ---coal body unit weight, t/m 3; σ---area trace unit, m 2; H---coal is thick, m; M 1---standby face section coal reserves, t; D represents curve surface integral.
3. according to claim 1ly utilize gas pumping data step type to evaluate section extraction to be connected rational method, to it is characterized in that:
Standby face each section faces replacement time is specially:
T i = Y Y 1 + Σ i = 1 n M i - 1 1 Y 2 - - - ( 3 )
In formula ---standby face i-th-1 section coal reserves, i-1>=0, t; T i---standby face i-th section faces replacement time, d.
4. according to claim 1ly utilize gas pumping data step type to evaluate section extraction to be connected rational method, to it is characterized in that: step 4) be specially,
1. drill site gas pumping scale data X is utilized tcalculate drill site extraction cumulative amount and development trend thereof, development trend utilizes the mode process of numerical fitting;
Q tduring for accumulative extraction amount:
Q t = Σ t = 0 t = i X t - - - ( 4 )
In formula
X t---drill site gas pumping scale, m 3/ min; Q t---drill site gas pumping total amount, m 3; T---the extraction time; 2. the maximum gas bearing capacity in drill site range of control and drill site range of control extraction critical value up to standard is utilized to calculate drill site range of control extraction cumulative amount Q up to standard c;
Q c = ( W 0 max - W ′ ) · ρ · ∫ ∫ D h · dσ - - - ( 5 )
W in formula 0max---the maximum gas bearing capacity in drill site range of control, m 3/ t;
W '-drill site extraction critical value up to standard, m 3/ t;
3. drill site extraction cumulative amount and development trend and drill site range of control extraction cumulative amount up to standard thereof is utilized to calculate drill site range of control extraction effect up to standard;
Q tduring for accumulative extraction amount: Q t>=Q c, extraction is up to standard, otherwise extraction is not up to standard, , t 1for extraction reaching standard time;
C 1=L 1·t 1(6)
C in formula 1, L 1---drill site characteristic parameter.
5. according to claim 1ly utilize gas pumping data step type to evaluate section extraction to be connected rational method, to it is characterized in that: step 4) be specially,
1. drill site gas pumping scale data X is utilized tcalculate drill site extraction cumulative amount and development trend thereof, development trend utilizes the mode process of numerical fitting;
Q tduring for estimating extraction amount:
Q t=f(t) (7)
T is the extraction time;
2. the maximum gas bearing capacity in drill site range of control and drill site range of control extraction critical value up to standard is utilized to calculate drill site range of control extraction cumulative amount Q up to standard c;
Q c = ( W 0 max - W ′ ) · ρ · ∫ ∫ D h · dσ - - - ( 8 )
In formula
W 0max---the maximum gas bearing capacity in drill site range of control, m 3/ t; W '-drill site extraction critical value up to standard, m 3/ t;
3. drill site extraction cumulative amount and development trend and drill site range of control extraction cumulative amount up to standard thereof is utilized to calculate drill site range of control extraction effect up to standard;
Q tduring for estimating extraction amount: Q t>=Q c, extraction is up to standard, otherwise extraction is not up to standard, , t 2for estimating extraction reaching standard time;
C 2=L 1·t 2(9)
L in formula 1, C 2---drill site characteristic parameter.
6. according to claim 1ly utilize gas pumping data step type to evaluate section extraction to be connected rational method, to it is characterized in that:
Following methods is adopted to obtain to described standby face each section extraction connection and balance:
Q c ′ = ( W 0 max 1 - W ′ ′ ) · ρ · ∫ ∫ D h · dσ - - - ( 10 )
In formula ---the maximum gas bearing capacity of standby face i-th section, m 3/ t; W "---standby face i-th section extraction critical value up to standard, m 3/ t; ---standby face i-th section extraction cumulative amount up to standard, m 3;
Q c Q c ′ = L 1 · t 2 L i · t i - - - ( 11 )
L in formula i---standby face i-th section drill site characteristic parameter; t i---standby face i-th section is found time in advance, d;
Work as t i≤ T ithen extraction connection and balance; Otherwise extraction is connected uneven, increases L when extraction is connected uneven i, reduce t i.
CN201410608331.3A 2014-10-30 2014-10-30 Section extraction is evaluated using gas pumping data step type be connected rational method Active CN104484492B (en)

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Publication number Priority date Publication date Assignee Title
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