CN109236293A - A kind of large-mining-height working surface squeeze blasting construction method - Google Patents
A kind of large-mining-height working surface squeeze blasting construction method Download PDFInfo
- Publication number
- CN109236293A CN109236293A CN201811138510.XA CN201811138510A CN109236293A CN 109236293 A CN109236293 A CN 109236293A CN 201811138510 A CN201811138510 A CN 201811138510A CN 109236293 A CN109236293 A CN 109236293A
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- China
- Prior art keywords
- class
- circle
- height
- mining
- presbyopia
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
- E21C37/06—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole
- E21C37/14—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole by compressed air; by gas blast; by gasifying liquids
Abstract
The present invention provides a kind of large-mining-height working surface squeeze blasting construction method, using the parallel perforating operation of multi-section side machine, a circle class onepull or circle two separate explosion of class；Borehole arrangement specifically: arrange five presbyopia when coal wall bottom cash thickness is more than working face mining height 2/3；When thickness arranges three presbyopia in 1/3~2/3 range of working face mining height；When spoil thickness is less than working face mining height 1/3, single eye is arranged；When a circle class onepull: when hole depth is 2.3m, eye distance 0.7m, explosive payload is volume 3；When circle two separate explosion of class: when hole depth is 1.8m, eye distance 1.0m, explosive payload is volume 2.Advantage are as follows: increase the selectivity according to a circle class onepull or circle two separate explosion of class; improve bottom cash crushing effect after explosion; a possibility that reducing secondary blasting; reduce the time consumed by blast working; guarantee is provided for the normal back production of working face, similar problems is encountered for subsequent coal exploiting field and provides Technical Reference.
Description
Technical field
The present invention relates to blasting technique field under mine, a kind of specifically large-mining-height working surface squeeze blast working
Method.
Background technique
Squeeze area is encountered during working face extraction under mine, bottom plate is mostly packsand, and the regional effect back production is long
Degree and width, bottom cash thickness is thicker, and because bottom cash is sandstone, lithology is harder, and coal machine cutting is difficult, need to carry out perforating and loosen dynamic big gun.
And in the prior art, lack the effective measures that dynamic big gun is loosened in perforating in response to this.
Summary of the invention
The technical problem to be solved by the present invention is to how improve bottom cash crushing effect after explosion, reduce secondary blasting
Possibility.
The present invention solves above-mentioned technical problem by the following technical programs:
A kind of large-mining-height working surface squeeze blasting construction method, comprising the following steps:
Using the parallel perforating operation of multi-section side machine, a circle class onepull or circle two separate explosion of class；
Borehole arrangement specifically: arrange five presbyopia when coal wall bottom cash thickness is more than working face mining height 2/3；When thickness is in work
Make to arrange three presbyopia in 1/3~2/3 range of face mining height；When spoil thickness is less than working face mining height 1/3, single eye is arranged；
When a circle class onepull: when hole depth is 2.3m, eye distance 0.7m, explosive payload is volume 3；When a circle class is quick-fried twice
When broken: when hole depth is 1.8m, eye distance 1.0m, explosive payload is volume 2.
Preferably, bottom row's eye distance is not more than 0.5m from bottom plate, and sealed borehole length must not be lower than 0.6m, borehole angle: top eye water
90 ° of straight angle degree, 5~10 ° of vertical angle；90 ° of bottom eye level angle, 10~15 ° of vertical angle.
When preferably, using five presbyopia or three presbyopia, arranging eye distance up and down is 0.5m.
The present invention has the advantages that
The selectivity according to a circle class onepull or circle two separate explosion of class is increased, bottom cash is broken after improving explosion
Effect, reduces the time consumed by blast working, provides for the normal back production of working face a possibility that reducing secondary blasting
It ensures, encounters similar problems for subsequent coal exploiting field and provide Technical Reference.
Detailed description of the invention
Fig. 1 is that 1 thickness of spoil layer is less than work in a kind of large-mining-height working surface squeeze blasting construction method of the present embodiment
Make the cloth ocular structure schematic diagram when mining height 1/3 of face；
Fig. 2 is that 1 thickness of spoil layer is more than work in a kind of large-mining-height working surface squeeze blasting construction method of the present embodiment
Make to arrange cloth ocular structure schematic diagram when five presbyopia when the mining height 2/3 of face；.
Fig. 3 is the structural schematic diagram that hole depth and angle, explosive are placed in the present embodiment.
Specific embodiment
The effect of to make to structure feature of the invention and being reached, has a better understanding and awareness, to preferable
Examples and drawings cooperation detailed description, is described as follows:
As shown in Figure 1 and Figure 2, a kind of large-mining-height working surface squeeze blasting construction method, comprising the following steps:
Using the parallel perforating operation of multi-section side machine, a circle class onepull or circle two separate explosion of class；
Borehole arrangement specifically: arrange five presbyopia when spoil layer 1 thickness in coal wall bottom is more than working face mining height 2/3；Work as cash
1 thickness of rock layers arranges three presbyopia in 1/3~2/3 range of working face mining height；When 1 thickness of spoil layer is less than working face mining height 1/3
When, arrange single eye；
As shown in figure 3, when a circle class onepull: when hole depth is 2.3m, eye distance 0.7m, 4 explosive payload of explosive is 3
Volume；When circle two separate explosion of class: when 5 depth of hole is 1.8m, eye distance 1.0m, explosive payload is volume 2.
Bottom arranges eye distance and is not more than 0.5m from bottom plate 2, and 3 length of sealing section must not be lower than 0.6m, borehole angle: top eye horizontal angle
90 °, 5~10 ° of vertical angle of degree；90 ° of bottom eye level angle, 10~15 ° of vertical angle.
When using five presbyopia or three presbyopia, arranging eye distance up and down is 0.5m.Original substantially of the invention has been shown and described above
Reason, main feature and advantages of the present invention.
It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, above-described embodiment and explanation
It is the principle of the present invention described in book, the present invention also has various changes without departing from the spirit and scope of the present invention
Change and improve, these changes and improvements are both fallen in the range of claimed invention.The present invention claims protection scope by
Appended claims and its equivalent define.
Claims (3)
1. a kind of large-mining-height working surface squeeze blasting construction method, it is characterised in that: the following steps are included:
Using the parallel perforating operation of multi-section side machine, a circle class onepull or circle two separate explosion of class；
Borehole arrangement specifically: arrange five presbyopia when coal wall bottom cash thickness is more than working face mining height 2/3；When thickness is in working face
Three presbyopia are arranged in 1/3~2/3 range of mining height；When spoil thickness is less than working face mining height 1/3, single eye is arranged；
When a circle class onepull: when hole depth is 2.3m, eye distance 0.7m, explosive payload is volume 3；When circle two separate explosion of class
When: when hole depth is 1.8m, eye distance 1.0m, explosive payload is volume 2.
2. a kind of large-mining-height working surface squeeze blasting construction method according to claim 1, it is characterised in that: bottom row
Eye distance is not more than 0.5m from bottom plate, and sealed borehole length must not be lower than 0.6m, borehole angle: 90 ° of eye level angle of top, vertical angle 5
~10 °；90 ° of bottom eye level angle, 10~15 ° of vertical angle.
3. a kind of large-mining-height working surface squeeze blasting construction method according to claim 1, it is characterised in that: use
When five presbyopia or three presbyopia, arranging eye distance up and down is 0.5m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811138510.XA CN109236293A (en) | 2018-09-28 | 2018-09-28 | A kind of large-mining-height working surface squeeze blasting construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811138510.XA CN109236293A (en) | 2018-09-28 | 2018-09-28 | A kind of large-mining-height working surface squeeze blasting construction method |
Publications (1)
| Publication Number | Publication Date |
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| CN109236293A true CN109236293A (en) | 2019-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811138510.XA Pending CN109236293A (en) | 2018-09-28 | 2018-09-28 | A kind of large-mining-height working surface squeeze blasting construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112682040A (en) * | 2020-12-29 | 2021-04-20 | 四川川煤石洞沟煤业有限责任公司 | Mining method for large-dip-angle coal seam flexible shield support falling frame arrangement zero coal pillar |
Citations (5)
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|---|---|---|---|---|
| SU1680990A1 (en) * | 1989-04-18 | 1991-09-30 | Филиал Новочеркасского политехнического института им.С.Орджоникидзе в г.Шахты | Method for working very thin gently sloping coal seams |
| SU1788254A1 (en) * | 1988-04-04 | 1993-01-15 | Uk Ni Pk I Podzemnoj Gidravlic | Method for unattended mining of thin steep outburst-prone and running-out coal seams |
| CN106939795A (en) * | 2017-05-02 | 2017-07-11 | 中国神华能源股份有限公司 | Thin bedrock high-seam working face large section cuts the method for protecting support of eye |
| CN107120137A (en) * | 2017-07-12 | 2017-09-01 | 安徽理工大学 | A kind of coal roadway tunneling is along seat earth Deephole pre-splitting blasting pumping method |
| CN107387085A (en) * | 2017-09-26 | 2017-11-24 | 河南理工大学 | A kind of tight roof and the porous controlled blasting softening method in coal seam |
-
2018
- 2018-09-28 CN CN201811138510.XA patent/CN109236293A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1788254A1 (en) * | 1988-04-04 | 1993-01-15 | Uk Ni Pk I Podzemnoj Gidravlic | Method for unattended mining of thin steep outburst-prone and running-out coal seams |
| SU1680990A1 (en) * | 1989-04-18 | 1991-09-30 | Филиал Новочеркасского политехнического института им.С.Орджоникидзе в г.Шахты | Method for working very thin gently sloping coal seams |
| CN106939795A (en) * | 2017-05-02 | 2017-07-11 | 中国神华能源股份有限公司 | Thin bedrock high-seam working face large section cuts the method for protecting support of eye |
| CN107120137A (en) * | 2017-07-12 | 2017-09-01 | 安徽理工大学 | A kind of coal roadway tunneling is along seat earth Deephole pre-splitting blasting pumping method |
| CN107387085A (en) * | 2017-09-26 | 2017-11-24 | 河南理工大学 | A kind of tight roof and the porous controlled blasting softening method in coal seam |
Non-Patent Citations (1)
| Title |
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| 裴春利: "大采高工作面过薄煤区安全回采技术", 《山东煤炭科技》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112682040A (en) * | 2020-12-29 | 2021-04-20 | 四川川煤石洞沟煤业有限责任公司 | Mining method for large-dip-angle coal seam flexible shield support falling frame arrangement zero coal pillar |
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Application publication date: 20190118 |