CN100562646C - Large-inclination-angle coal bed mining top board multiple segment control exploration method for deeply inclined - Google Patents
Large-inclination-angle coal bed mining top board multiple segment control exploration method for deeply inclined Download PDFInfo
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Abstract
The invention provides a kind of large-inclination-angle coal bed mining top board multiple segment control exploration method for deeply inclined, this method is: arrange two in the same stage of coal seam with upper curtate/work plane, stay between section/work plane to establish to be used to the coal column protecting or isolate; Upper curtate/work plane when single seam mining in the same stage of exploitation earlier; When coal seam group mining, exploit day-coal earlier; First exploitation upper curtate/work plane in the same stage of same coal seam, not caving coal or carry out controlled caving coal in the recovery process; Normal caving coal mining operation is since second and with lower curtate/working face mining; Second and with in lower curtate/working face extraction process, recovery section section/work plane is used to the coal column protecting or isolate, make the spoil of upper curtate/work plane sliding, roll be filled in this section/work plane, the one-tenth space of upper area top coal after emitting.This method can improve large-inclination-angle coal bed top coal caving top-coal recovery rate, work plane output and guarantee safety in production.
Description
Technical field
The present invention relates to a kind of large-inclination-angle coal bed mining top board multiple segment control exploration method for deeply inclined, belong to the mining technique field.
Background technology
Large-inclination-angle coal bed be in tiltedly and the part of steeply pitching seam, generally the inclination angle is 35 °-55 ° coal seam.Be that international mining circle generally acknowledges awkward mining coal seam.
Large-inclination-angle coal bedly move towards coal wall when exploitation, along the rock stratum brisement of face length direction, move and strata behaviors can be divided into three zones, be that roof movement (mine pressure) manifests more weak lower area relatively, the upper area that central region that roof movement is subject to certain restrictions and roof movement are violent.Obviously, during large-inclination-angle coal bed top coal caving, in these three different zones, the raveling of top coal with to emit putting property different.At work plane lower area (1/4-1/3 that is about the work plane tilt length), coal degree deficiency or the top coal migration space that ravels in top is very little, emits putting property relatively poor; In work plane, upper area (3/4-2/3 that is about the work plane tilt length), the coal degree that ravels in top is good, emits putting property better.
Generally speaking, during large-inclination-angle coal bed top coal caving, the drawing effectiveness in the work plane central region is best, and the work plane upper area takes second place, and lower area is relatively poor; In addition, owing to put coal hopper (spheroid) axis (length) meeting generation deflection to a certain degree, its degree of deflection increases with the increase of seam inclination, causes the actual body of emitting of top coal to shift to top (coal discharge outlet inclination top); These two characteristics have also determined the basic trend of " top board-support-base plate " stability of a system in the drawing coal technology process, that is: in the drawing coal technology process, " top board-support-base plate " stability of a system is best in the work plane lower area, takes second place in the middle part, and top is relatively poor.Theoretical research and production practices show that all the large-inclination-angle coal bed stability of moving towards coal wall " top board-support-base plate " system is determining the output and the safety problem of top-coal caving face.Because in zones of different, emitting putting property and emitting effect of top coal is different, and the output source of work plane is different from the caving coal (output of work plane comes from all interior coal discharge outlets of the whole length ranges of work plane) on the universal.The output that high inclination-angle moves towards the longwell top-coal caving face mainly comes from the work plane, coal discharge outlet in the upper area, the problem that this situation is brought is exactly: if work plane improves output and top-coal recovery rate, just might make the top coal emptying in the work plane upper area, make and constitute element " top board " disappearance in work plane " top board-support-base plate " system, in the subregion on work plane top, can't form " top board-support-base plate " system or formation " antiforge system ", this obviously system constitutes the formation of element disappearance or " antiforge system ", can't guarantee the stability (can't form " support-country rock " interaction system) of work plane " top board-support-base plate " system, the supporting unstability that will inevitably cause the work plane regional area, support tilt appears, downslide and crowded, sting the frame phenomenon, and this phenomenon has " many meters Lip river effects ", to develop to central region from the work plane upper area, thereby make " top board-support-base plate " the system's unstability in the work plane multi-region section, cause work plane to stop." top board-support-base plate " system's unstability in a single day that even more serious is, the disrumpent feelings and motion of face roof has lost the constraint and the control of support, just might occur impacting dynamic pressure and manifest, and the catastrophe of initiation work plane country rock causes security incident.From another aspect, keep the stability of work plane " top board-support-base plate " system, prevent country rock catastrophe, cause security incident, just must control the top coal discharging amount of work plane, the output of work plane will be restricted, and top-coal recovery rate also just can reduce inevitably.
Summary of the invention
At above-mentioned the deficiencies in the prior art, the invention provides a kind of improve large-inclination-angle coal bed top coal caving top-coal recovery rate, work plane output and guarantee safety in production large-inclination-angle coal bed mining top board multiple segment control exploration method for deeply inclined.
To achieve these goals, the technical solution used in the present invention is: a kind of large-inclination-angle coal bed mining top board multiple segment control exploration method for deeply inclined is characterized in that may further comprise the steps:
(1) arranges two in the same stage with upper curtate/work plane, be installed with between section/work plane and be used to the coal column protecting or isolate.
(2) when single seam mining, the upper curtate/work plane in the same stage of exploitation earlier; When coal seam group mining, exploit day-coal earlier; Exploit upper curtate/work plane earlier at same coal seam, in the same stage.
(3) in the coal seam in the same stage in upper curtate/working face mining process, not caving coal or guaranteeing that force piece does not occur carrying out controlled caving coal under sliding, as to fall and the sting frame prerequisite; Normal caving coal mining operation is since second and with lower curtate/working face mining;
(4) second and with in lower curtate/working face extraction process, guarantee the tunnel satisfy ventilate, under the prerequisite that the pedestrian requires, the recovery section section is used to the coal column protecting or isolate, reduces or eliminates the supporting role of section coal pillar to top board under slave mode;
(5) second and carry out top coal caving with lower curtate/work plane, in this section/working face mining process, section coal pillar weakens the supporting role of top board, cover the activity of roof strata multi-region section on impelling, make upper curtate/work plane through the cunning of the spoil after adopting, roll be filled in this section/work plane, the one-tenth space of upper area top coal after emitting.
Use this method to prolong work plane physical length and effective caving coal length, work plane top coal coal caving ratio and output have been improved, prevented in the large-inclination-angle coal bed top-coal caving face again, upper area " top board-support-base plate " system's unstability, guaranteed the work plane safety in production.This method has solved " top board-support-base plate " system's destabilization problems in the work plane upper area, is the key point that improves large-inclination-angle coal bed top coal caving top-coal recovery rate, work plane output and guarantee safety in production.
Below by drawings and Examples, the inventive method is described in further detail.
Description of drawings
Fig. 1 is two heading arrangement diagrams;
Fig. 2 is the inventive method working seam I schematic diagram;
Fig. 3 is the inventive method working seam II upper curtate schematic diagram;
Fig. 4 is the inventive method working seam II lower curtate schematic diagram.
Description of reference numerals:
Crossheading of 1-; No. two crossheadings of 2-; No. three crossheadings of 3-;
No. four crossheadings of 4-; No. five crossheadings of 5-; No. six crossheadings of 6-;
No. seven crossheadings of 7-; No. eight crossheadings of 8-; 9-coal seam I;
10-coal seam II; I first section 12-coal seam I second section that collapses in 11-coal seam collapses
Spoil falls; Spoil falls;
13-coal seam II first section spoil that falls that collapses.
The specific embodiment
Exploitation with a large-inclination-angle coal bed stage is an example, and two coal seams: coal seam I 9 and coal seam II 10 were arranged in this stage, and each coal seam is divided into two sections: form coal seam I first section by a crossheading 1 and No. two crossheadings 2; Form coal seam I second section by No. three crossheadings 3 and No. four crossheadings 4; Form coal seam II first section by No. five crossheadings 5 and No. six crossheadings 6; Form coal seam II second section by No. seven crossheadings 7 and No. eight crossheadings 8.
Large-inclination-angle coal bed mining top board multiple segment control exploration method for deeply inclined may further comprise the steps:
1. between coal seam I first section and coal seam I second section (No. two crossheadings 2 and No. three crossheading 3 between) is installed with protection or isolated coal pillar; (No. six crossheadings 6 and No. seven crossheading 7 between) stays and establishes protection or isolated coal pillar between coal seam II first section and coal seam II second section.
2. earlier coal seam I is exploited as shown in Figure 1; Earlier I first section in coal seam is exploited in the same stage at working seam I.
3. I first section in coal seam is being carried out in the recovery process not caving coal or guaranteeing that force piece does not occur carrying out controlled caving coal under sliding, as to fall and the sting frame prerequisite; Normal caving coal mining operation is exploited from coal seam I second section.
4. as shown in Figure 2; in the coal seam I second section exploitation process; guaranteeing the satisfied ventilation in tunnel; under the prerequisite that the pedestrian requires; reclaim part segment protection or isolated coal pillar between No. two crossheadings 2 and No. three crossheadings 3; reduce segment protection or isolated coal pillar bulk strength; under slave mode, reduce or eliminate section coal pillar to the supporting role of top board (only play isolate the coal seam machine adopt spoil effect in the thickness range); the scope of activities (I second section in coal seam collapse spoil 12 territory of settling in an area that collapses that falls) that makes this section roof strata and the coal seam I first section roof strata scope of activities of having adopted (I first section in coal seam collapse spoil 11 territory of settling in an area that collapses that falls) intersect and participate in the coal seam I second section country rock activity; thereby enlarge this work plane overlying rock scope of activities, form " large working area ".
5. as shown in Figure 3, in the coal seam II first section recovery process, not caving coal or guaranteeing that force piece does not occur carrying out controlled caving coal under sliding, as to fall and the sting frame prerequisite; Normal caving coal mining operation is exploited from coal seam II second section.As shown in Figure 4; in the coal seam II second section recovery process; guaranteeing the satisfied ventilation in tunnel; under the prerequisite that the pedestrian requires; reclaim part segment protection or isolated coal pillar between No. six crossheadings 6 and No. seven crossheadings 7; reduce segment protection or isolated coal pillar bulk strength; carry out top coal caving at coal seam II second section; impel the activity of overlying rock multi-region section; make coal seam I first section spoil 11 that falls that collapses; coal seam I second section spoil 12 that falls that collapses; collapse fall spoil 13 of coal seam II first section is sliding; roll and be filled in this section (work plane); the space of one-tenth after upper area top coal is emitted; thereby work plane physical length and effective caving coal length had both been prolonged; work plane top coal coal caving ratio and output have been improved; prevented again in the large-inclination-angle coal bed top-coal caving face; upper area " top board-support-base plate " system's unstability has guaranteed the work plane safety in production.
Claims (1)
1. large-inclination-angle coal bed mining top board multiple segment control exploration method for deeply inclined is characterized in that may further comprise the steps:
(1) arranges two in the same stage of coal seam with upper curtate/work plane, be installed with between section/work plane and be used to the coal column protecting or isolate;
(2) when single seam mining, the upper curtate/work plane in the same stage of exploitation earlier; When coal seam group mining, the exploitation day-coal is exploited upper curtate/work plane earlier at same coal seam, in the same stage earlier;
(3) in the coal seam in the same stage in upper curtate/working face mining process, not caving coal or guaranteeing that force piece does not occur carrying out controlled caving coal under sliding, as to fall and the sting frame prerequisite; Normal caving coal mining operation is since second and with lower curtate/working face mining;
(4) second and with in lower curtate/working face extraction process, guarantee the tunnel satisfy ventilate, under the prerequisite that the pedestrian requires, recovery section is used to the section coal pillar protecting or isolate, reduces or eliminates the supporting role of section coal pillar to top board under slave mode;
(5) second and carry out top coal caving with lower curtate/work plane, in the recovery process, section coal pillar weakens the supporting role of top board, cover the activity of roof strata multi-region section on impelling, make upper curtate/work plane through the cunning of the spoil after adopting, roll be filled in this section/work plane, the one-tenth space of upper area top coal after emitting.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101884160A CN100562646C (en) | 2007-11-30 | 2007-11-30 | Large-inclination-angle coal bed mining top board multiple segment control exploration method for deeply inclined |
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| CNB2007101884160A CN100562646C (en) | 2007-11-30 | 2007-11-30 | Large-inclination-angle coal bed mining top board multiple segment control exploration method for deeply inclined |
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| CN100562646C true CN100562646C (en) | 2009-11-25 |
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Cited By (1)
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| CN102080545A (en) * | 2010-12-17 | 2011-06-01 | 长沙矿山研究院 | High-risk pillar open-air deep hole collaborative stoping method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080545A (en) * | 2010-12-17 | 2011-06-01 | 长沙矿山研究院 | High-risk pillar open-air deep hole collaborative stoping method |
| CN102080545B (en) * | 2010-12-17 | 2014-02-26 | 长沙矿山研究院 | High-risk pillar open-air deep hole collaborative stoping method |
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