CN101418689A - High mining height workface stepped coal cutting process - Google Patents
High mining height workface stepped coal cutting process Download PDFInfo
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- CN101418689A CN101418689A CNA2008102363150A CN200810236315A CN101418689A CN 101418689 A CN101418689 A CN 101418689A CN A2008102363150 A CNA2008102363150 A CN A2008102363150A CN 200810236315 A CN200810236315 A CN 200810236315A CN 101418689 A CN101418689 A CN 101418689A
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Abstract
Provided is a large mining height fully-mechanized step type coal cutting process. In a fully mechanized working face, a coal mining machine cuts the coal on the coal wall along the coal seam thickness direction to form a step on the coal wall, and then cutting coal for the step at lower part of the coal wall, and the processes are performed circularly in order; or the front and the rear rollers of the coal mining machines are adopted to directly perform upper and lower cutting to keep the cut coal wall having one step all the time; when the height of the coal wall of the coal mining working face is changed, the upper and lower height of the step of the coal wall is adjusted to make the height of the coal seam above the step always lower than the height of the coal seam under the step so as to the optimal stress state of the coal wall area, and to essentially improve the stability of the coal rock of the working face. The process not only can effectively control the large area rib spalling or end surface roof caving caused by long time stay of the large mining high coal wall, but also can work as an operation platform for outburst prevention circulation measure construction for the coal and gas projecting under the coal seam. The process is simple, convenient in construction, easy in operation, and has wide practicability.
Description
Technical field
The present invention relates to big mining and high comprehensive mining coal cutting technology, especially a kind of high mining height workface stepped coal cutting technology.
Background technology
The safety and high efficiency of coal resources is directions of world's coal industry development.In recent ten years, continuous development along with science and technology, the technical equipment and the production management level of coal in China exploitation constantly promote, be greatly improved aspect the key technology in solving coal production, make the safe and efficient production of coal constantly jump onto new height, wherein having significant production technique is the mining technology.This technology makes the safety and high efficiency problem of thick and super high seam obtain good solution through in the continuous development of China nearly two more than ten years and perfect.But because the complexity and the diversity of China's condition of coal seam occurrence, in the thick coal-layer mining under some complex conditions, top coal caving is restricted, and for example has the condition of thick seam of coal and gas outburst risk.Especially under coal seam thickness is condition of thick seam about 5.0m, face the selection of multiple production practice mode.Wherein once adopting complete thick big mining height fully-mechanized mining technology mode is one of effective technology mode, also is the development trend that realizes high-efficiency mining both at home and abroad under the condition of thick seam about 5.0m.At present, China carries out big mining height and once adopts the complete thick success that obtained reaching more firmly under the hard coal seam condition, but, highly big when coal cutting, when the coal seam is softer, working face wall easily produces wall caving, and then cause the roof fall of work plane roof of head face, cause casualties and production technique normally to implement.Because under cherry coal or three soft (top board, coal seam, base plate) coal seam conditions, Surrounding Rock Control problems such as coal wall caving and end face roof fall are difficult to effective solution, make the safety and high efficiency problem progress of making a breakthrough property never under this condition, thereby become emphasis and the difficult point problem of researching and solving in the coal production.
Summary of the invention
The objective of the invention is at the problem that exists in the prior art, provide a kind of technology simple, easy to operate, can effectively solve the high mining height workface stepped coal cutting technology of coal wall caving and end face roof fall.
High mining height workface stepped coal cutting technology of the present invention: in fully-mechanized mining working, with coal mining machine roller along the coal seam thickness direction, earlier coal cutting is carried out on rib top, make rib be formed with the step of a flat distance up and down, and then the step of the flat distance of rib carried out coal cutting, circulation is carried out successively, to avoid coal wall caving and end face roof fall; Perhaps directly cut up and down with the time-division, make the rib of cutting remain the step of a flat distance with the front and back cylinder of coal-winning machine; When coal-face rib height changes, adjust the height up and down of rib step, make coal seam height on the step be lower than coal seam height under the step all the time.
The step thicknesses of described flat distance is that cutting of coal mining machine roller is dark, and minimum value is not less than 600mm.
High mining height workface stepped coal cutting technology of the present invention, adopt the step coal winning technology, elder generation's extraction is topped bar, reserve and get out of a predicament or an embarrassing situation, both can be used as the operating platform of projecting coal bed next the protrusion-dispelling circulation measure construction of coal and gas, and also can effectively control long-time stop of big mining height rib and cause large tracts of land wall caving or end face roof fall.For guaranteeing the stability that the two prominent high seam full-seam mining mine coal of dead-soft are helped and preventing the end face roof fall, and create conditions for effective enforcement of the projecting coal bed work plane of coal and gas part outburst prevention measures, fundamentally improve the stability of work plane coal petrography, and create conditions for effective enforcement of the local outburst prevention measures of work plane, especially the high-efficiency mining for dead-soft thick seam large mining high comprehensive mining provides guarantee, and the safe working projecting coal bed for coal and gas has great importance.Its technology is simple, and easy construction is easy to operate, has practicality widely.
Description of drawings
Fig. 1 is the top bar structural representation of coal of coal mining machine roller of the present invention cutting;
Fig. 2 is the get out of a predicament or an embarrassing situation structural representation of coal of coal mining machine roller of the present invention cutting;
Fig. 3 is the structural representation that coal mining machine roller of the present invention cuts the up/down steps coal simultaneously.
Among the figure: a-work plane machine mining height degree, the height of topping bar of b-step coal cutting, c-flat distance, 1-rib, 2-coal mining machine roller, 3-support.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are further described:
High mining height workface stepped coal cutting technology of the present invention: in fully-mechanized mining working, adopt the mode of the two-way step coal cutting of coal-winning machine, along the coal seam thickness direction, earlier coal cutting is carried out on rib 1 top with coal mining machine roller 2, make rib 1 form a step, shown in Figure 1.And then the step of rib 1 lower part carried out coal cutting, shown in Figure 2.Subsequently support 3 is moved frame, each work cycle all adopts the step coal cutting along the coal seam thickness direction, and first extraction is topped bar, and reserves and gets out of a predicament or an embarrassing situation, and then adopt and get out of a predicament or an embarrassing situation, and circulation is carried out successively, to avoid rib 1 wall caving and end face roof fall.Perhaps directly the cylinder of coal-winning machine is set to former and later two, and the distance between before and after two cylinders equates apart from c with the flat of coal seam step.Two cylinders up and down with former and later two positions of coal-winning machine carry out coal cutting simultaneously, make the rib of cutting remain a step, and are shown in Figure 3.When coal-face rib height a changes, adjust the height up and down of rib step, make coal seam height b on the step be lower than coal seam height a-b under the step all the time, the flat thickness apart from c of up/down steps is that cutting of coal mining machine roller is dark, and the flat coal seam height a-b minimum under c rib step of step is not less than 600mm.
Claims (2)
1. high mining height workface stepped coal cutting technology, it is characterized in that: in fully-mechanized mining working, with coal mining machine roller (2) along the coal seam thickness direction, earlier coal cutting is carried out on rib (1) top, make rib (1) be formed with a flat step up and down apart from (c), and then the flat step apart from (c) of rib (1) carried out coal cutting, circulation is carried out successively, to avoid rib (1) wall caving and end face roof fall; Perhaps directly use the front and back cylinder (2) of coal-winning machine to cut up and down, make the rib (1) of cutting remain a flat step apart from (c) with the time-division; When coal-face rib height (a) when changing, adjust the height up and down of rib step, make coal seam height (b) on the step be lower than coal seam height (a-b) under the step all the time.
2. high mining height workface stepped coal cutting technology according to claim 1 is characterized in that: the step thicknesses of described flat distance (c) is that cutting of coal mining machine roller is dark, and minimum value is not less than 600mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008102363150A CN101418689A (en) | 2008-11-07 | 2008-11-07 | High mining height workface stepped coal cutting process |
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| CNA2008102363150A CN101418689A (en) | 2008-11-07 | 2008-11-07 | High mining height workface stepped coal cutting process |
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| CN101418689A true CN101418689A (en) | 2009-04-29 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949291A (en) * | 2009-07-09 | 2011-01-19 | 玛珂系统分析和开发有限公司 | Control method |
| CN102061922A (en) * | 2010-10-26 | 2011-05-18 | 中国矿业大学 | Method for carrying out comprehensive mechanical coal mining and continuous propulsion mining on split and merged coal beds |
| CN102536225A (en) * | 2011-12-20 | 2012-07-04 | 中国矿业大学 | Large-mining-height fully-mechanized-face fast coal mining technology |
| CN103362511A (en) * | 2013-07-25 | 2013-10-23 | 山东科技大学 | Steep medium-thickness coal seam stepped coal pillar-free coal mining method |
| CN104265292A (en) * | 2014-09-19 | 2015-01-07 | 中国矿业大学 | Layered false roof retaining method on solid filled coal face |
| CN104564070A (en) * | 2014-11-27 | 2015-04-29 | 中国煤炭科工集团太原研究院有限公司 | Method for type selection of short-wall mining working face equipment of continuous miner |
| CN108166976A (en) * | 2018-02-28 | 2018-06-15 | 桂林电子科技大学 | A kind of classification pusher efficiently cutting device of coal mining machine and method |
| CN109209367A (en) * | 2018-10-31 | 2019-01-15 | 攀枝花学院 | Fully mechanized mining for high working face coal wall |
-
2008
- 2008-11-07 CN CNA2008102363150A patent/CN101418689A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949291B (en) * | 2009-07-09 | 2014-06-18 | 玛珂系统分析和开发有限公司 | Control method |
| CN101949291A (en) * | 2009-07-09 | 2011-01-19 | 玛珂系统分析和开发有限公司 | Control method |
| CN102061922A (en) * | 2010-10-26 | 2011-05-18 | 中国矿业大学 | Method for carrying out comprehensive mechanical coal mining and continuous propulsion mining on split and merged coal beds |
| CN102061922B (en) * | 2010-10-26 | 2012-10-24 | 中国矿业大学 | Method for carrying out comprehensive mechanical coal mining and continuous propulsion mining on split and merged coal beds |
| CN102536225B (en) * | 2011-12-20 | 2016-01-20 | 中国矿业大学 | The quick coal winning technology in mining height workface face |
| CN102536225A (en) * | 2011-12-20 | 2012-07-04 | 中国矿业大学 | Large-mining-height fully-mechanized-face fast coal mining technology |
| CN103362511A (en) * | 2013-07-25 | 2013-10-23 | 山东科技大学 | Steep medium-thickness coal seam stepped coal pillar-free coal mining method |
| CN103362511B (en) * | 2013-07-25 | 2015-08-05 | 山东科技大学 | High-dipping medium-thickness seam step is without pillar working |
| CN104265292A (en) * | 2014-09-19 | 2015-01-07 | 中国矿业大学 | Layered false roof retaining method on solid filled coal face |
| CN104564070A (en) * | 2014-11-27 | 2015-04-29 | 中国煤炭科工集团太原研究院有限公司 | Method for type selection of short-wall mining working face equipment of continuous miner |
| CN108166976A (en) * | 2018-02-28 | 2018-06-15 | 桂林电子科技大学 | A kind of classification pusher efficiently cutting device of coal mining machine and method |
| CN108166976B (en) * | 2018-02-28 | 2023-10-27 | 桂林电子科技大学 | Hierarchical propulsion type high-efficiency coal cutter cutting device and method |
| CN109209367A (en) * | 2018-10-31 | 2019-01-15 | 攀枝花学院 | Fully mechanized mining for high working face coal wall |
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Open date: 20090429 |