CN108303515A - A kind of underground coal mine organic geochmistry observation statistical method - Google Patents
A kind of underground coal mine organic geochmistry observation statistical method Download PDFInfo
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Abstract
The invention belongs to CBM exploration and development technical fields, are related to a kind of underground coal mine organic geochmistry observation statistical method.Including microcosmic observation statistical method and macroscopic view observation statistical method；The observation for carrying out macroscopical crack in underground coal mine first, divides in the small layering of different coal rock layers, then carries out micro-crack observation to laboratory from batch sampling in the small layering of observation point, is finally drawn a conclusion according to observation data.Method through the invention can obtain the measured data of a large amount of coal seam reservoirs micro-crack and macroscopical crack under underground coal mine large scale and the basic holding original occurrence status of coal seam reservoirs, substantially increase Research scale, data volume and the accuracy of organic geochmistry observation.
Description
Technical field
The invention belongs to CBM exploration and development technical fields, are related to a kind of underground coal mine organic geochmistry observation system
Meter method.
Background technology
Organic geochmistry is made of micro-crack and macroscopical crack, and micro-crack development is um grades, and macroscopic view is split
Gap includes cm grades of cleat and m grades of external crack and bedding fissure, and organic geochmistry is divided into microfissure, interior life is split
Four kinds of gap, external crack and bedding fissure, the origin cause of formation is different, and scale respectively has size, but fissure system is combined with each other, mutually interconnects
It is logical, wherein external crack and the dominant fracture that bedding fissure is entire fissure system, cleat are the limb crack on trunk,
Microfissure is the subbranch crack on limb crack；They together constitute fissure system and the coal bed gas migration-of coal seam reservoirs
Seepage channel decides the permeability and coal bed gas well yield of coal seam reservoirs.
Because of the buried underground of coal seam reservoirs, fissure system directly can not be observed and be measured, and current observation procedure is asked there are following
Topic：First, organic geochmistry observation procedure mainly acquires coal petrography sample or the coal heart, carries out hole-crack experiment and observation,
It is too small that there are Research scales, and the result of observation differs larger problem with practical；Second, it is heterogeneous due to coal seam reservoirs height
Property, a small amount of several sample observed results can not represent entire block organic geochmistry development characteristics；Third, due to acquisition
The sample and the coal heart arrived departing from the original occurrence status of coal seam reservoirs, adopted by density, length, width of organic geochmistry etc.
The influence of sample and sample preparation, accuracy are relatively low.
The observation procedure of organic geochmistry has that Research scale is small, data volume is few, accuracy is low at present, no
The theoretical research and current demand of CBM exploration and development can be met.In cbm development block or near, often have just normally opened
The coal mine adopted is helped in the coal road two of underground coal mine or coal roadway tunneling is met head on and stope, is all organic geochmistry
Best observation site is the natural laboratory of organic geochmistry research.The tunnel length of observation can from tens meters to
Several kms can obtain a large amount of data from vertical upper and transverse direction, and observation coal seam reservoirs in laboratory can effectively be avoided to split
Coal sample Research scale, sample size few defect low with accuracy when slot sytem.Underground coal mine can be fine observation and system
Meter macroscopical crack such as bedding fissure, external crack, cleat（Face cleat and end hugger）Development characteristics and connection situation；And
It acquires a large amount of coal petrography sample and utilizes microscope or scanning electron microscope observation and description coal seam reservoirs micro-crack such as microfissure indoors
Development characteristics and connection situation；The final observational study for making organic geochmistry constitutes one completely from microcosmic to macroscopic view
System.
Invention content
The solved the technical problems existing in the prior art of the present invention are that the observation procedure of current organic geochmistry is deposited
In the problem that Research scale is small, data volume is few, accuracy is low, the theoretical research of CBM exploration and development and real need cannot be met
It asks, and the observation statistical method of the present invention is divided into the development for observing and counting respectively crack in coal seam reservoirs under microcosmic and macro-scale
Feature, including the width in crack, length, density.
The present invention is technical solution used by solving its technical problem：
A kind of underground coal mine organic geochmistry observation procedure, including microcosmic observation statistical method and macroscopic view observation statistics side
Method；The observation for carrying out macroscopical crack in underground coal mine first, divides in the small layering of different coal rock layers, then from small point of observation point
Batch sampling carries out micro-crack observation to laboratory on layer, is finally drawn a conclusion according to observation data.
First, steps are as follows for macroscopical crack observation statistical method：Step 1, help in the coal road two of underground coal mine or
Coal roadway tunneling is met head on and stope, selectes the preferable tunnel of coal wall exposure；Step 2 sets observation point and determines and sees
Survey range；Step 3, the division unit lattice in observation scope；Step 4 utilizes tape measure, compass, vernier caliper measurement coal seam reservoirs
The development length of middle cleat, external crack and bedding fissure, width, occurrence；Step 5, statistical measurement as a result, calculate
Go out data, complete the observation statistical work of this observation point, then acquires coal petrography sample, enter observation point.
Further, in step 1, the tunnel length is not less than 100m.
Further, in step 2, the observation point is 10 observation points to be determined with the length at the intervals 10m, described
Observation scope be every 1 observation point on coal wall with the observation scope of long 2000 × 2000mm.
Next, steps are as follows for the microcosmic observation statistical method：Underground coal mine is collected coal petrography sample system by step 1
At coal petrography mating plate；Step 2 observes the microfissure development characteristics of coal petrography mating plate using light microscope or scanning electron microscopic observation；Step
Rapid three, the microfissure criteria for classifying is set as 3 major class：Big microfissure, middle microfissure and small microfissure；Step 4, according to microfissure
The criteria for classifying counts the data of big microfissure, middle microfissure and small microfissure；Step 5, statistical measurement as a result, calculating number
According to completing the observation statistical work of this sample.
Further, in the step 1, the length and width of the coal petrography mating plate are not less than 20mm.
Further, in the step 2, the coal petrography mating plate is divided into 4 junior unit lattice of 10 × 10mm, in order to
Microfissure development characteristics are observed using light microscope or scanning electron microscopic observation.
Further, in the step 3, the microfissure criteria for classifying is：Big microfissure is trunk microfissure, length >=
10mm, width >=10 μm extend farther out；Middle microfissure is limb microfissure, 5mm≤length<10 mm, width >=5 μm；It is small micro-
Crack is branch's microfissure, 5 μm of length ＜ 5 mm, width ＜.
Possessed advantageous effect is the present invention compared with prior art：Method through the invention can be in underground coal mine
Large scale and the basic actual measurement for keeping obtaining a large amount of coal seam reservoirs micro-crack and macroscopical crack under the original occurrence status of coal seam reservoirs
Data substantially increase Research scale, data volume and the accuracy of organic geochmistry observation.
Specific implementation mode
The present invention is described in further detail with reference to embodiment, embodiments of the present invention are not limited thereto.
Embodiment 1
A kind of underground coal mine organic geochmistry observation procedure is divided into microcosmic observation statistical method and macroscopic view observation statistical method,
Carrying out coal seam reservoirs macroscopic view crack observation procedure first, steps are as follows：
Step 1 is helped in the coal road two of underground coal mine or coal roadway tunneling is met head on and stope, and it is preferable to select coal wall exposure
Tunnel, tunnel length be not less than 100m；
Step 2 determines that 10 observation points, every 1 observation point determine observation with long 2000 × 2000mm with the length at the intervals 10m
Range；
Step 3 is divided into 4 cells of 1000 × 1000mm in the observation scope；
Step 4 utilizes cleat in tape measure, compass, vernier caliper measurement coal seam reservoirs（Face cleat and end hugger）, external split
Gap and the development length of bedding fissure, width；
Step 5, statistical measurement as a result, calculate data, complete the observation statistical work of this observation point, data be filled into
Macroscopical crack observed result statistical form（Such as following table）In, into next observation point；
In the range that observation point determines, it is vertical on according to coal lithotypes divide small layering, include mainly glance coal, semibright coal,
Four kinds of semidull coal and dull coal.Sampling can destroy macroscopical crack of coal petrography in the small layering of different coal petrographys, therefore first before sampling
The observation for first carrying out macroscopical crack, after obtaining accurate data, then carries out coal petrography sampling.
Separately sampled from different small layerings, carrying out microcosmic observation statistical method, steps are as follows：
Underground coal mine is collected coal petrography sample and the long and wide coal mating plate for being not less than 20mm is made by step 1；
The coal petrography mating plate is divided into 4 junior unit lattice of 10 × 10mm by step 2, is seen using light microscope or scanning electron microscope
Examine observation microfissure development characteristics；
Step 3 sets the microfissure criteria for classifying as 3 major class：Big microfissure, middle microfissure and small microfissure；The standard of division
For：Big microfissure is trunk microfissure, and length >=10mm, width >=10 μm extend farther out；Middle microfissure is branch's microfissure,
5mm≤length<10 mm, width >=5 μm；Small microfissure is ramuscule microfissure, 5 μm of length ＜ 5 mm, width ＜；
Step 4, according to the data of big microfissure, middle microfissure and small microfissure in 4 cells of the above canonical statistics；
Step 5, statistical measurement as a result, calculate data, complete the observation statistical work of this sample, data be filled into micro-
See crack observed result statistical form（Such as following table）In, enter a next coal petrography sample.
To sum up, the result that M001, M002 underground coal mine observation point measure finds out that bedding fissure, external crack and Nei Sheng are split
Gap is more developed；The big microfissure accounting from coal petrography the sample M001-A001 and M002-A002 that M001 and M002 observation points are got
Reach 13% and 19%, illustrates that big microfissure comparative development, flow conductivity are stronger；Therefore coal seam reservoirs are split in M001, M002 observation point
Slot sytem includes the bedding fissure of dominant fracture and external crack, the cleat in limb crack and the microfissure in branch crack
All more develop, macroscopical crack and micro-crack are interconnected preferable, and flow conductivity is strong, the permeability of the observation point position compared with
It is high.
Embodiment 2
A kind of underground coal mine organic geochmistry observation procedure is divided into microcosmic observation method and macroscopical observation procedure, carries out first
Steps are as follows for coal seam reservoirs macroscopic view crack observation procedure：
Step 1 is helped in the coal road two of underground coal mine or coal roadway tunneling is met head on and stope, and it is preferable to select coal wall exposure
Tunnel, tunnel length be not less than 100m；
Step 2 determines that 10 observation points, every 1 observation point determine observation with long 2000 × 2000mm with the length at the intervals 10m
Range；
Step 3 is divided into 4 cells of 1000 × 1000mm in the observation scope；
Step 4 utilizes cleat in tape measure, compass, vernier caliper measurement coal seam reservoirs（Face cleat and end hugger）, external split
Gap and the development length of bedding fissure, width；
Step 5, statistical measurement as a result, calculate data, complete the observation statistical work of this observation point, data be filled into
In macroscopical crack observed result statistical form, into next observation point.
In the range that observation point determines, it is vertical on according to coal lithotypes divide small layering, include mainly glance coal, half bright
Four kinds of coal, semidull coal and dull coal.Sampling can destroy macroscopical crack of coal petrography in the small layering of different coal petrographys, therefore before sampling
The observation for carrying out macroscopical crack first, after obtaining accurate data, then carries out coal petrography sampling.
Separately sampled from different small layerings, carrying out microcosmic observation statistical method, steps are as follows：
Underground coal mine is collected coal petrography sample and the long and wide coal mating plate for being not less than 20mm is made by step 1；
The coal petrography mating plate is divided into 4 junior unit lattice of 10 × 10mm by step 2, is seen using light microscope or scanning electron microscope
Examine observation microfissure development characteristics；
Step 3 sets the microfissure criteria for classifying as 3 major class：Big microfissure, middle microfissure and small microfissure；The standard of division
For：Big microfissure is trunk microfissure, and length >=10mm, width >=10 μm extend farther out；Middle microfissure is branch's microfissure,
5mm≤length<10 mm, width >=5 μm；Small microfissure is ramuscule microfissure, 5 μm of length ＜ 5 mm, width ＜；
Step 4, according to the data of big microfissure, middle microfissure and small microfissure in 4 cells of the above canonical statistics；
Step 5, statistical measurement as a result, calculate data, complete the observation statistical work of this sample, data be filled into micro-
It sees in the observed result statistical form of crack, enters a next coal petrography sample.
To sum up, the result that M003, M004 underground coal mine observation point measure finds out that bedding fissure, external crack and Nei Sheng are split
Gap agensis；Big microfissure accounting reaches from coal petrography the sample M003-A003 and M004-A004 that M003 and M004 observation points are got
To 0% and 3%, illustrate that big microfissure agensis, flow conductivity are weaker；Therefore organic geochmistry in M003, M004 observation point
Bedding fissure including dominant fracture and external crack, the cleat in limb crack and the microfissure in branch crack are not sent out
It educates, macroscopical crack and micro-crack are interconnected poor, and flow conductivity is weak, and the permeability of the observation point position is relatively low.
The above is only presently preferred embodiments of the present invention, not does limitation in any form to the present invention, any ripe
Professional and technical personnel is known, without departing from the scope of the present invention, when the technology contents work using the disclosure above
Go out change or modify the equivalent embodiment of equivalent variations, as long as being the content without departing from technical solution of the present invention, still falls within this
In the range of inventive technique scheme.
Claims (8)
1. a kind of underground coal mine organic geochmistry observation procedure, which is characterized in that including microcosmic observation statistical method and macro
Observation statistical method；The observation for carrying out macroscopical crack in underground coal mine first, divides in the small layering of different coal rock layers, then
Micro-crack observation is carried out to laboratory from batch sampling in the small layering of observation point, is finally drawn a conclusion according to observation data.
2. a kind of underground coal mine organic geochmistry observation procedure according to claim 1, which is characterized in that described macro
Seeing crack observation statistical method, steps are as follows：Step 1 is helped in the coal road two of underground coal mine or coal roadway tunneling is met head on and back production
Working face selectes the preferable tunnel of coal wall exposure；Step 2 sets observation point and determines observation scope；Step 3, in observation model
Enclose interior division unit lattice；Step 4 utilizes cleat, external crack and layer in tape measure, compass, vernier caliper measurement coal seam reservoirs
The development length of facial cleft gap, width, occurrence；Step 5, statistical measurement as a result, calculate data, complete the sight of this observation point
Statistical work is surveyed, coal petrography sample is then acquired, enters observation point.
3. a kind of underground coal mine organic geochmistry observation procedure according to claim 2, which is characterized in that in step
In one, the tunnel length is not less than 100m.
4. a kind of underground coal mine organic geochmistry observation procedure according to claim 2, which is characterized in that in step
In two, the observation point is 10 observation points to be determined with the length at the intervals 10m, and the observation scope is every 1 observation point
With the observation scope of long 2000 × 2000mm on coal wall.
5. a kind of underground coal mine organic geochmistry observation procedure according to claim 1, which is characterized in that described micro-
Steps are as follows for observation statistical method：Underground coal mine is collected coal petrography sample and coal petrography mating plate is made by step 1；Step 2, profit
The microfissure development characteristics of coal petrography mating plate are observed with light microscope or scanning electron microscopic observation；Step 3, setting microfissure divide
Standard is 3 major class：Big microfissure, middle microfissure and small microfissure；Step 4 counts big fine fisssure according to the microfissure criteria for classifying
The data of gap, middle microfissure and small microfissure；Step 5, statistical measurement as a result, calculate data, complete the observation of this sample
Statistical work.
6. a kind of underground coal mine organic geochmistry observation procedure according to claim 5, which is characterized in that the step
In rapid one, the length and width of the coal petrography mating plate are not less than 20mm.
7. a kind of underground coal mine organic geochmistry observation procedure according to claim 5, which is characterized in that the step
In rapid two, the coal petrography mating plate is divided into 4 junior unit lattice of 10 × 10mm, in order to utilize light microscope or scanning electricity
Sem observation observes microfissure development characteristics.
8. a kind of underground coal mine organic geochmistry observation procedure according to claim 5, which is characterized in that the step
In rapid three, the microfissure criteria for classifying is：Big microfissure is trunk microfissure, length >=10mm, width >=10 μm, extend compared with
Far；Middle microfissure is limb microfissure, 5mm≤length<10 mm, width >=5 μm；Small microfissure is branch's microfissure, length
5 μm of ＜ 5 mm, width ＜.
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| CN103698333A (en) * | 2014-01-22 | 2014-04-02 | 中国地质大学（北京） | System and method for automatically and quantitatively analyzing coal rock ray plate fracture |
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2018
- 2018-01-30 CN CN201810090746.4A patent/CN108303515A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103163134A (en) * | 2013-02-16 | 2013-06-19 | 肖建新 | Coal reservoir fracture observation submicroscopic analysis technology |
| CN103698333A (en) * | 2014-01-22 | 2014-04-02 | 中国地质大学（北京） | System and method for automatically and quantitatively analyzing coal rock ray plate fracture |
Non-Patent Citations (3)
| Title |
|---|
| 姚艳斌 等: "沁水盆地煤储层微裂隙发育的煤岩学控制机理", 《中国矿业大学学报》 * |
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