CN206972234U - A kind of pit shaft exposes safely projecting coal bed constructing structure - Google Patents
A kind of pit shaft exposes safely projecting coal bed constructing structure Download PDFInfo
- Publication number
- CN206972234U CN206972234U CN201720916320.0U CN201720916320U CN206972234U CN 206972234 U CN206972234 U CN 206972234U CN 201720916320 U CN201720916320 U CN 201720916320U CN 206972234 U CN206972234 U CN 206972234U
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- China
- Prior art keywords
- pit shaft
- drilling
- inner ring
- ring drilling
- exposes
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Abstract
The utility model overcomes the shortcomings of the prior art, there is provided a kind of pit shaft exposes safely projecting coal bed constructing structure, can effectively avoid Gas Outburst and gas explosion accident；In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：A kind of pit shaft exposes safely projecting coal bed constructing structure, including pit shaft, coal seam, outer ring drilling and inner ring drilling, the pit shaft is located at the top in coal seam, the drilling of two circles is provided with the outside of the pit shaft, respectively outer ring drilling and inner ring drilling, the lower end of the outer ring drilling and inner ring drilling is located at below seat earth, metallic framework is fitted with the inner ring drilling, cement mortar is perfused with the outer ring drilling and inner ring drilling, the bottom side of the pit shaft is provided with multiple boreholes, and water is marked with after borehole loads explosive in the pit shaft；The utility model can be widely applied to field of coal mine safety.
Description
Technical field
A kind of pit shaft of the utility model exposes safely projecting coal bed constructing structure, belongs to technical field of mine safety.
Background technology
Pit shaft exposed coal is the engineering of a relative risk, especially exposes projecting coal bed, and coal and gas prominent easily occurs
Or the accident such as gas explosion.Although before exposed coal is projecting coal bed, it is necessary to take gas pre-drainage and a series of through validity check etc.
Measure, error or other factorses are examined it is also possible to existing, can not avoid that gas accident occurs completely.The country often has because pit shaft is taken off
Coal and the coal and gas prominent or gas explosion accident occurred.
Utility model content
The utility model overcomes the shortcomings of the prior art, there is provided a kind of pit shaft exposes safely projecting coal bed apply
Work structure, it can effectively avoid Gas Outburst and gas explosion accident.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：A kind of pit shaft exposes safely protrusion
The constructing structure in coal seam, including pit shaft, coal seam, outer ring drilling and inner ring drilling, the pit shaft are located at the top in coal seam, the well
The outside of cylinder is provided with the drilling of two circles, respectively outer ring drilling and inner ring drilling, the lower end of the outer ring drilling and inner ring drilling
Below seat earth, metallic framework is fitted with the inner ring drilling, is irrigated in the outer ring drilling and inner ring drilling
There is cement mortar, the bottom side of the pit shaft is provided with multiple boreholes, water is marked with after borehole loads explosive in the pit shaft.
The bottom of the pit shaft is at least 2m with coal seam normal distance.
The lower end of the outer ring drilling and inner ring drilling is located at 1.5~3m below seat earth.
Depth of cracking closure of the water in pit shaft is 3~5m.
Pitch of holes between each hole of outer ring drilling is 0.3~0.7m, the pitch of holes between each hole of inner ring drilling
Also it is 0.3~0.7m.
The outer ring drilling and inner ring drilling are set in bell mouth shape, and the big mouth down of horn mouth.
The whole hole point of the outer ring drilling is located at pit shaft outboard wheel 2~4m of profile, and the whole hole point of inner ring drilling is located on the outside of pit shaft
Outer 1~the 3m of contour line, and the pitch of holes between the whole hole point of outer ring drilling and the whole hole point of inner ring drilling is 1m.
The utility model has an advantageous effect in that compared with prior art：The utility model is simple in construction, easy to operate,
And it can be largely avoided and coal and gas prominent or gas explosion accident occurs.
Brief description of the drawings
The utility model is described further below in conjunction with the accompanying drawings.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the sectional view of Section A-A in Fig. 1.
In figure：1 it is pit shaft, 2 be coal seam, 3 be outer ring drilling, 4 be inner ring drilling, 5 be cement mortar, 6 is water.
Embodiment
As shown in Figure 1 and Figure 2, a kind of pit shaft of the utility model exposes safely projecting coal bed constructing structure, including pit shaft 1,
Coal seam 2, outer ring drilling 3 and inner ring drilling 4, the pit shaft 1 is located at the top in coal seam 2, and the outside of the pit shaft 1 is provided with two circles
Drilling, respectively outer ring drilling 3 and inner ring drilling 4, the lower end of the outer ring drilling 3 and inner ring drilling 4 are located under the bottom plate of coal seam 2
It is square, metallic framework is fitted with the inner ring drilling 4, cement mortar 5, institute are perfused with the outer ring drilling 3 and inner ring drilling 4
The bottom side for stating pit shaft 1 is provided with multiple boreholes, and water 6 is marked with after borehole loads explosive in the pit shaft 1.
The bottom of the pit shaft 1 is at least 2m with the normal distance of coal seam 2.
The lower end of the outer ring drilling 3 and inner ring drilling 4 is located at 1.5~3m below the bottom plate of coal seam 2.
Depth of cracking closure of the water 6 in pit shaft 1 is 3~5m.
Pitch of holes between 3 each holes of outer ring drilling is 0.3~0.7m, between the hole between 4 each holes of inner ring drilling
Away from being also 0.3~0.7m.
The outer ring drilling 3 and inner ring drilling 4 are set in bell mouth shape, and the big mouth down of horn mouth.
3 whole hole points of the outer ring drilling are located at the outboard wheel 2~4m of profile of pit shaft 1, and inner ring 4 whole hole points of drilling are located at pit shaft 1
Outer 1~the 3m of outboard wheel profile, and the pitch of holes between the 4 whole hole points of whole hole point and inner ring drilling of outer ring drilling 3 is 1m.
The pit shaft that the utility model is related to exposes safely projecting coal bed method, implements in the steps below：
The first step, when projecting coal bed 2 normal distance, 2~3m is taken off in the construction of pit shaft 1 to distance, stop driving, cleaning is floating
After cash, drilled along the circle of the surrounding of pit shaft 1 arrangement two, i.e. outer ring drilling 3 and inner ring drilling 4, the outer ring drilling 3 and inner ring drilling 4
Construction extremely enters 1.5~3m below the bottom plate of coal seam 2；
Second step, insertion steel pipes or rail as metallic framework and inject cement mortar 5 and fixed in inner ring drilling 4,
Cement mortar is all injected in outer ring drilling 3, after cement slurry sets, can form a circle safety curtain, playing prevents from sending out during exposed coal
The effect of soft coal and gas burst accident；
3rd step, multiple boreholes are set in the bottom of pit shaft 1, after borehole construction finishes and loads explosive, filled with water 6
Pit shaft 1, depth of fill is 3~5m, during explosion, can effectively avoid that gas explosion accident occurs.
4th step, the filling water 6 in pit shaft 1, after blasting work terminates, ground is drawn to by slush pump.
Embodiment of the present utility model is explained in detail above in conjunction with accompanying drawing, but the utility model is not limited to
Embodiment is stated, in those of ordinary skill in the art's possessed knowledge, the utility model aims can also not departed from
On the premise of various changes can be made.
Claims (7)
1. a kind of pit shaft exposes safely projecting coal bed constructing structure, it is characterised in that：Including pit shaft（1）, coal seam（2）, outer ring
Drilling（3）Drilled with inner ring（4）, the pit shaft（1）Positioned at coal seam（2）Top, the pit shaft（1）Outside be provided with two circles
Drilling, respectively outer ring drill（3）Drilled with inner ring（4）, the outer ring drilling（3）Drilled with inner ring（4）Lower end be located at coal
Layer（2）Below bottom plate, the inner ring drilling（4）Inside it is fitted with metallic framework, the outer ring drilling（3）Drilled with inner ring（4）It is interior
It is perfused with cement mortar（5）, the pit shaft（1）Bottom side be provided with multiple boreholes, the pit shaft（1）Inherent borehole loads explosive
After be marked with water（6）.
2. a kind of pit shaft according to claim 1 exposes safely projecting coal bed constructing structure, it is characterised in that：The well
Cylinder（1）Bottom and coal seam（2）Normal distance is at least 2m.
3. a kind of pit shaft according to claim 1 exposes safely projecting coal bed constructing structure, it is characterised in that：It is described outer
Circle drilling（3）Drilled with inner ring（4）Lower end be located at coal seam（2）1.5~3m below bottom plate.
4. a kind of pit shaft according to claim 1 exposes safely projecting coal bed constructing structure, it is characterised in that：The water
（6）In pit shaft（1）Interior depth of cracking closure is 3~5m.
5. a kind of pit shaft according to claim 1 exposes safely projecting coal bed constructing structure, it is characterised in that：It is described outer
Circle drilling（3）Pitch of holes between each hole is 0.3~0.7m, the inner ring drilling（4）Pitch of holes between each hole also for 0.3~
0.7m。
6. a kind of pit shaft according to claim 1 exposes safely projecting coal bed constructing structure, it is characterised in that：It is described outer
Circle drilling（3）Drilled with inner ring（4）Set in bell mouth shape, and the big mouth down of horn mouth.
7. a kind of pit shaft according to claim 1 or 6 exposes safely projecting coal bed constructing structure, it is characterised in that：Institute
State outer ring drilling（3）Whole hole point is located at pit shaft（1）Outboard wheel 2~4m of profile, inner ring drilling（4）Whole hole point is located at pit shaft（1）Outside
Outer 1~the 3m of side wheel profile, and the outer ring drills（3）Whole hole point drills with inner ring（4）Pitch of holes between whole hole point is 1m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720916320.0U CN206972234U (en) | 2017-07-26 | 2017-07-26 | A kind of pit shaft exposes safely projecting coal bed constructing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720916320.0U CN206972234U (en) | 2017-07-26 | 2017-07-26 | A kind of pit shaft exposes safely projecting coal bed constructing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206972234U true CN206972234U (en) | 2018-02-06 |
Family
ID=61397173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720916320.0U Expired - Fee Related CN206972234U (en) | 2017-07-26 | 2017-07-26 | A kind of pit shaft exposes safely projecting coal bed constructing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206972234U (en) |
-
2017
- 2017-07-26 CN CN201720916320.0U patent/CN206972234U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180206 Termination date: 20180726 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |