CN1734225A - Blasting method for fully mechanized mining face - Google Patents
Blasting method for fully mechanized mining face Download PDFInfo
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- CN1734225A CN1734225A CN 200410070481 CN200410070481A CN1734225A CN 1734225 A CN1734225 A CN 1734225A CN 200410070481 CN200410070481 CN 200410070481 CN 200410070481 A CN200410070481 A CN 200410070481A CN 1734225 A CN1734225 A CN 1734225A
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- mechanized mining
- blasting method
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Abstract
This invention relates to a blast method of the full mechanized working face, which includes the following steps: firstly packing the explosive in the PVC tube; drilling a polarity of blast holes on the middle of the full mechanized working face distantly, and arranging them on the same beeline, wherein the length of the blast hole is 10-18m, the vertical depth is 8-10m, the elevation angle is 25-35 degree, and the distance between the blast hole and the hole cutting bar is 2-3m;Putting the PVC tube which contains with explosive into the blast hole; using the series connection and double detonating fuses and double detonators to ignite the explosive in each blast hole. This invention can make sufficient preparation for ground, the down-hole organization is in perfect order, the explosive packing time is shortened, the working intension is lower, and the top boards in hole digging area of the working face are all laid down after firing guns, so the back spoil of the bracket covers tightly, and the demolish effect is well.
Description
Technical field
The present invention relates to a kind of blasting method of fully-mechanized mining working, relate in particular to a kind of deep hole presplit blasting method of fully-mechanized mining working.
Background technology
At present, in the coal in China industry, the fully-mechanized mining working in many collieries equipment is the comprehensive equipment of adopting of a complete set of world-class high-yield and high-efficiency of introducing.
These equipments are comparatively expensive, and the working surface production ability is bigger.In the practice process of back production fully-mechanized mining working, sometimes the first weighting step pitch of working face reaches about 50m, and being the formula of cutting strides, impact failure power is bigger, hydraulic support has been produced the huge impact destruction, and especially damage amounts such as stent strut, valve group, oil cylinder are bigger, also have indivedual supports phenomenon also to occur killing in addition, the damage of these equipment has not only caused waste economically, has also seriously influenced project progress.Simultaneously, the hurricane that first weighting produces constitutes a serious threat to operating personnel's life security of working face, keeps the safety in production normally thereby influence working face.
This collapses and implements the top board explosion before falling so at the fully-mechanized mining working place, to destroy the integrality on old top, make it collapse as early as possible, reduce the first weighting step pitch, avoid or alleviate impulse force destruction that old top first weighting produces support and the threat that operating personnel's life is constituted as far as possible, guarantee working face safety ordinary production, bring into play the advantage of sophisticated equipment better, make contributions for the coal in China cause to greatest extent.
But the time of existing blasting method is long, blasting efficiency is low, demolition effect is relatively poor, and the back working face goaf top plate of blowing out fails all to put down, and the tight degree of spoil inbreak is lower behind the support.
Therefore, be necessary to design a kind of blasting method of new fully-mechanized mining working, to overcome above-mentioned various defectives.
Summary of the invention
The object of the present invention is to provide a kind of blasting method of fully-mechanized mining working, by adopting this blasting method, made adequate preparation in ground, the down-hole tissue is reasonable, the powder charge time shortens, and labour intensity is lower, and blows out the back working face and adopt the porose area top board and all put down, the spoil inbreak is tight behind the support, and demolition effect is good.
In order to realize goal of the invention, method of the present invention comprises the following steps:
(1) explosive is packed in advance in the pvc pipe;
(2) compartment of terrain is drilled with arrangement a plurality of blast holes point-blank in the middle part of combining the employing working face, wherein blast hole length is 10-18m (being preferably 15m), vertical depth is 8-10m (being preferably 8.17m), the elevation angle is 25-35 degree (being preferably 33 degree), and blast hole is paid the 2-3m (being preferably 2.5m) of group apart from cutting eye;
(3) pvc pipe that explosive will the be housed blast hole of packing into;
(4) adopt the series connection connection mode, and adopt two primacords and double detonator to ignite the interior explosive of each blast hole.
By using the blasting method of this fully-mechanized mining working, made adequate preparation in ground, the down-hole tissue is reasonable, the powder charge time shortens, labour intensity is lower, and blows out the back working face and adopt the porose area top board and all put down, behind the support spoil inbreak tight, demolition effect is good.
Description of drawings
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail, wherein:
Fig. 1 is the flow chart of the blasting method of fully-mechanized mining working of the present invention.
The specific embodiment
See also Fig. 1, the blasting method of fully-mechanized mining working of the present invention may further comprise the steps:
(1) in pvc pipe is packed explosive on ground in advance, wherein explosive adopts high-strength emulsified explosive, and specification is preferably ф 70 * 500mm, and coefficient of charge is preferably 0.6, adopts the continuous coupled mode powder charge of forward;
(2) compartment of terrain is drilled with arrangement a plurality of blast holes point-blank in the middle part of combining the employing working face, wherein blast hole length is 10-18m (being preferably 15m), vertical depth is 8-10m (being preferably 8.17m), the elevation angle is 25-35 degree (being preferably 33 degree), and blast hole is paid the 2-3m (being preferably 2.5m) of group apart from cutting eye;
(3) pvc pipe that explosive will the be housed blast hole of packing into;
(4) adopt the series connection connection mode, and adopt two primacords and double detonator to ignite the interior explosive of each blast hole, distance and the warning line distance of blowing out all is not less than 300m.
In addition, blasting method that should fully-mechanized mining working is with pvc pipe powder charge stemming, and stemming quantity can reach designing requirement, and two groups of parallel carrying out are adopted in the powder charge of underground blasting hole, and speed is very fast.
By using the blasting method of this fully-mechanized mining working, made adequate preparation in ground, save well The lower blast hole powder charge time, the down-hole tissue is reasonable, the powder charge time shorten, and labour intensity is lower, and And the rear working face of blowing out is adopted the porose area top board and is all put down, behind the support spoil inbreak tight, explosion effect Fruit is good, and workman's labour intensity also reduces greatly simultaneously, has successfully implemented combining of deep hole blasting The mining face First Weighting Interval of Main reduces than original, and the degree of first weighting greatly weakens or be not clear Aobvious, avoided immense pressure that large-area first weighting produces and shock wave to support and operation people Member's harm is laid a good foundation for the normal safety in production of working face, has improved Homes Using TV, Thereby realization high-yield and high-efficiency.
Claims (5)
1. the blasting method of a fully-mechanized mining working is characterized in that: the blasting method of this fully-mechanized mining working may further comprise the steps:
(1) explosive is packed in advance in the pvc pipe;
(2) be drilled with arrangement a plurality of blast holes point-blank in the comprehensive compartment of terrain, working face middle part of adopting, wherein blast hole length is 10-18m, and vertical depth is 8-10m, and the elevation angle is the 25-35 degree, and blast hole is apart from cutting the eye pair 2-3m of group;
(3) pvc pipe that explosive will the be housed blast hole of packing into;
(4) adopt the series connection connection mode, and adopt two primacords and double detonator to ignite the interior explosive of each blast hole.
2. the blasting method of fully-mechanized mining working as claimed in claim 1 is characterized in that: the explosive that adopts is an emulsion, and charging means is the continuous coupled mode of forward.
3. the blasting method of fully-mechanized mining working as claimed in claim 2 is characterized in that: the hole length described in second step is preferably 15m, and the elevation angle is preferably 33 degree.
4. the blasting method of fully-mechanized mining working as claimed in claim 3 is characterized in that: the explosive specification described in the first step is preferably φ 70 * 500mm, and coefficient of charge is preferably 0.6.
5. the blasting method of fully-mechanized mining working as claimed in claim 4 is characterized in that: the blast hole spacing is between the 8-12m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410070481 CN1734225A (en) | 2004-08-03 | 2004-08-03 | Blasting method for fully mechanized mining face |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410070481 CN1734225A (en) | 2004-08-03 | 2004-08-03 | Blasting method for fully mechanized mining face |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1734225A true CN1734225A (en) | 2006-02-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410070481 Pending CN1734225A (en) | 2004-08-03 | 2004-08-03 | Blasting method for fully mechanized mining face |
Country Status (1)
| Country | Link |
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| CN (1) | CN1734225A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498681A (en) * | 2013-10-14 | 2014-01-08 | 兖州煤业股份有限公司 | Method for preventing hard roof large-area abnormal pressure coming from fully mechanized caving face |
| CN106643355A (en) * | 2017-01-19 | 2017-05-10 | 中国矿业大学(北京) | Forced roof caving method for hugely-thick hard roof in deep coal mine |
-
2004
- 2004-08-03 CN CN 200410070481 patent/CN1734225A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498681A (en) * | 2013-10-14 | 2014-01-08 | 兖州煤业股份有限公司 | Method for preventing hard roof large-area abnormal pressure coming from fully mechanized caving face |
| CN106643355A (en) * | 2017-01-19 | 2017-05-10 | 中国矿业大学(北京) | Forced roof caving method for hugely-thick hard roof in deep coal mine |
| CN106643355B (en) * | 2017-01-19 | 2019-07-09 | 中国矿业大学(北京) | A kind of overhead caving method of the huge thick tight roof of deep coalmine |
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