CN103670413B - Under slowing down coombe, the method manifested is pressed in shallow buried coal seam broadwall ore deposit - Google Patents
Under slowing down coombe, the method manifested is pressed in shallow buried coal seam broadwall ore deposit Download PDFInfo
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- CN103670413B CN103670413B CN201210378536.8A CN201210378536A CN103670413B CN 103670413 B CN103670413 B CN 103670413B CN 201210378536 A CN201210378536 A CN 201210378536A CN 103670413 B CN103670413 B CN 103670413B
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- 239000003245 coal Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000005065 mining Methods 0.000 claims abstract description 22
- 230000000694 effects Effects 0.000 claims abstract description 7
- 230000002159 abnormal effect Effects 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 2
- 239000011707 mineral Substances 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention belongs to Mineral Engineering field, under being specifically related to slow down coombe, the method manifested is pressed in shallow buried coal seam broadwall ore deposit.Manifest abnormal problem to solve shallow buried coal seam broadwall ore deposit pressure under coombe, the present invention proposes when shallow buried coal seam broadwall is carried out in coombe development area, and earth's surface coombe developmental state is considered as an important factor in order.According to mining effect angle and the disrumpent feelings angle of overlying strata, the influence area of coombe to exploitation is divided into without influence area, influence area and strong influence area.The determination keeping away ditch exploitation the position of terminal mining line with exploit along ditch that work plane arranges should according to following principle: keep away ditch exploit time, work plane the position of terminal mining line should be positioned at outside the strong influence area of coombe; When exploiting along ditch, the boundary position of the nearly ditch side of work plane should within the region that overlying strata height is greater than fissure zone height.The method relate to calculating parameter few, be easy to field conduct, safety is high, can be widely used in the wide scale security exploitation of shallow buried coal seam under coombe.
Description
Technical field
The invention belongs to Mineral Engineering field, under being specifically related to slow down coombe, the method manifested is pressed in shallow buried coal seam broadwall ore deposit.
Background technology
Along with the continuous enforcement of China's development of the West Regions state basic policy, the developing focus of coal resources in China has started to shift to western part.Compared with southwestern coalfield, coalfield, northwest surface vegetation is sparse, water and soil conservation ability is more weak, earth's surface water erosion is serious, coombe in length and breadth, greatly, landform is incoherent, and relative relief has more than 100 rice, mostly is coombe development area in slope body occurrence change.The adverse effect that surface relief produces seam mining by increasing theoretical research and engineering practice confirm.Such as, in old mine Pillar Recovery process, repeatedly there is the unexpected unstable phenomenon of irregular coal column, cause large area roof fall in the safe group of Inner Mongol gouy; In the progradation of new mine coal wall, stope can be pressed suddenly, and intensity exceedes pushes up first weighting always, then after advancing certain distance, returns to normal again, the theoretical unaccountable phenomenon of these conventional ore deposit pressures, all relevant with Coal Face Passing Through earth's surface coombe.Under coombe during shallow buried coal seam broadwall, manifest abnormal phenomenon for a series of ore deposits pressures such as hydraulic support pushed down, coal wall caving are serious, there is the problem of poor stability, high cost in existing technical measures, has a strong impact on the safety in production of mine.
Summary of the invention
Abnormal problem is manifested in order to solve shallow buried coal seam broadwall ore deposit pressure under coombe, the present invention proposes shallow buried coal seam broadwall ore deposit under slowing down coombe and press the method manifested, the method is convenient to practical operation, can be widely used in the wide scale security exploitation of coal resources under coombe.
For achieving the above object, the present invention adopts following technical scheme: when carrying out exploitation and disposing, for reducing or avoiding coombe on the impact of exploitation, by change work plane the position of terminal mining line and adjustment advance of the face direction, realize avoiding keeping away ditch exploitation or moving towards exploiting along ditch of exploitation along coombe of coombe exploitation; When keeping away ditch exploitation, according to mining effect angle (δ), overlying strata are disrumpent feelings angle
be divided into the influence area of coombe to exploitation without influence area (I), influence area (II) and strong influence area (III), work plane the position of terminal mining line (1) should be positioned at outside the strong influence area of coombe (III); When exploiting along ditch, the boundary position (2) of the nearly ditch side of work plane should be greater than within the region of fissure zone height (h) at overlying strata height (H).
The present invention slows down the beneficial effect of pressure process for show in shallow buried coal seam broadwall ore deposit under coombe:
(1) effectively can slow down shallow buried coal seam broadwall ore deposit pressure under coombe and manifest the impacts such as abnormal hydraulic support pushed down, the coal wall caving caused be serious, ensure the safe working of mine;
(2) deficiency of shallow buried coal seam longwall mining method under current coombe is made up;
(3) the method applicability is strong, easy to implement, can improve the rate of recovery of coal resources to greatest extent.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiments of the present invention are further described:
Accompanying drawing is the schematic diagram that the present invention slows down pressure process for show in shallow buried coal seam broadwall ore deposit under coombe.
In figure: 1-keep away ditch exploitation work plane stop adopting position, 2-exploits nearly ditch side work plane boundary position along ditch, 3-coombe slope push up, the line of demarcation of 4-influence area and strong influence area, I-without influence area, II-influence area, the strong influence area of III-, δ-mining effect angle,
-overlying strata are disrumpent feelings angle, the fissure zone height of h-position 2 correspondence, the overlying strata height of H-position 2 correspondence.
Detailed description of the invention
When carrying out exploitation and disposing, for reducing or avoiding the movable impact on exploitation of coombe slope body, by changing work plane the position of terminal mining line and adjustment advance of the face direction, realize keeping away ditch exploitation or exploiting along ditch.
With reference to accompanying drawing, when keeping away ditch exploitation, according to mining effect angle (δ), overlying strata are disrumpent feelings angle
the influence area of coombe to exploitation is divided into without influence area (I), influence area (II) and strong influence area (III).Mining effect angle (δ) and the disrumpent feelings angle of overlying strata
can be consulted by the field data in each mining area and obtain.When top, coombe slope (3) is subject to mining influence, the position residing for work plane is namely without the line of demarcation of influence area (I) and influence area (II); Push up (3) by coombe slope and do the disrumpent feelings angle of overlying strata
the corresponding line of demarcation of influence area (II) and strong influence area (III), position (4) i.e..Work plane the position of terminal mining line (1) should be positioned at outside the strong influence area of coombe (III).When exploiting along ditch, the boundary position (2) of the nearly ditch side of work plane should be greater than within the region of fissure zone height (h) at overlying strata height (H).Overlying strata height (H) can be obtained by the borehole data consulting mining area.The feature that when considering shallow buried coal seam broadwall under the body of coombe slope, fissure zone is grown, the field measurement data (fissure zone height is 10 ~ 14 times of mining height) of mining area shallow buried coal seam broadwall are grown, the design formulas of fissure zone height (h): h=10.9M+10.62 when obtaining shallow buried coal seam broadwall under the body of coombe slope in conjunction with UDEC numerical result, laboratory results of Physical and coombe.
In formula: h-fissure zone height, m.
M-mining height, m.
Claims (1)
1. one kind slow down coombe under shallow buried coal seam broadwall ore deposit press the method manifested, it is characterized in that: when carrying out exploitation and disposing, for reducing or avoiding coombe on the impact of exploitation, by change work plane the position of terminal mining line and adjustment advance of the face direction, realize avoiding keeping away ditch exploitation or moving towards exploiting along ditch of exploitation along coombe of coombe exploitation; When keeping away ditch exploitation, according to mining effect angle (δ), overlying strata are disrumpent feelings angle
be divided into the influence area of coombe to exploitation without influence area (I), influence area (II) and strong influence area (III), work plane the position of terminal mining line (1) should be positioned at outside the strong influence area of coombe (III); When exploiting along ditch, the boundary position (2) of the nearly ditch side of work plane should be greater than within the region of fissure zone height (h) at overlying strata height (H).
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| CN201210378536.8A CN103670413B (en) | 2012-09-21 | 2012-09-21 | Under slowing down coombe, the method manifested is pressed in shallow buried coal seam broadwall ore deposit |
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| CN201210378536.8A CN103670413B (en) | 2012-09-21 | 2012-09-21 | Under slowing down coombe, the method manifested is pressed in shallow buried coal seam broadwall ore deposit |
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| CN103670413A CN103670413A (en) | 2014-03-26 |
| CN103670413B true CN103670413B (en) | 2016-03-02 |
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| CN115860314B (en) * | 2023-02-14 | 2023-05-09 | 北京科技大学 | Method and system for preventing and controlling coal seam working face impact danger based on surface ditch |
Citations (5)
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|---|---|---|---|---|
| US4887935A (en) * | 1987-12-23 | 1989-12-19 | Bochumer Eisenhutte Heintzmann Gmbh & Co. Kg | Method of controlling the movement of a longwall excavation front, especially the face or breast of a coal seam |
| CN101109283A (en) * | 2007-08-20 | 2008-01-23 | 太原理工大学 | quantitative decision method for feasibility of mining above hollow |
| RU2341657C1 (en) * | 2007-06-15 | 2008-12-20 | Государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный горный институт имени Г.В. Плеханова (технический университет)" | Method of prevention of development entries in coal bed areas |
| CN101509378A (en) * | 2008-02-17 | 2009-08-19 | 刘玉德 | Shallow buried thin bedrock coal bed short wall continuous mining technology suitable condition classification method |
| CN102536238A (en) * | 2012-01-09 | 2012-07-04 | 中国矿业大学 | Mining method for large-inclined angle laminar non-coal solid mineral deposit |
-
2012
- 2012-09-21 CN CN201210378536.8A patent/CN103670413B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4887935A (en) * | 1987-12-23 | 1989-12-19 | Bochumer Eisenhutte Heintzmann Gmbh & Co. Kg | Method of controlling the movement of a longwall excavation front, especially the face or breast of a coal seam |
| RU2341657C1 (en) * | 2007-06-15 | 2008-12-20 | Государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный горный институт имени Г.В. Плеханова (технический университет)" | Method of prevention of development entries in coal bed areas |
| CN101109283A (en) * | 2007-08-20 | 2008-01-23 | 太原理工大学 | quantitative decision method for feasibility of mining above hollow |
| CN101509378A (en) * | 2008-02-17 | 2009-08-19 | 刘玉德 | Shallow buried thin bedrock coal bed short wall continuous mining technology suitable condition classification method |
| CN102536238A (en) * | 2012-01-09 | 2012-07-04 | 中国矿业大学 | Mining method for large-inclined angle laminar non-coal solid mineral deposit |
Non-Patent Citations (1)
| Title |
|---|
| 冲沟发育矿区浅埋煤层采动坡体活动机理及其控制研究;王旭锋;《中国博士学位论文全文数据库工程科技Ⅰ辑》;20100215(第2期);第3页、第9页、第18页、第21-25页、第43页及第97页 * |
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