CN103696772A - Method for increasing recovery rate of fully mechanized caving face - Google Patents
Method for increasing recovery rate of fully mechanized caving face Download PDFInfo
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- CN103696772A CN103696772A CN201310749086.3A CN201310749086A CN103696772A CN 103696772 A CN103696772 A CN 103696772A CN 201310749086 A CN201310749086 A CN 201310749086A CN 103696772 A CN103696772 A CN 103696772A
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Abstract
The invention relates to a coal mining method of a fully mechanized caving face, in particular to a method for increasing the recovery rate of a coal face. The first 20-meter coal seam is only subjected to coal cutting; behind the first 20-meter coal seam, a working surface is pressed by a top plate; coal mining operation is performed by the circulation of caving coal according to one-cutter one-caving multi-wheel interval sequence until 60 meters before a stop line of the working surface; when the caving ratio is more than or equal to 1:1.2 and less than 1:1.1, the coal caving interval is 0.8 to 1.2 m; when the caving ratio is more than or equal to 1:1.1, the coal caving interval is 0.6 to 0.8 m; from 60 meters before the stop line to the stop line, only coal cutting is performed; a top coal caving hydraulic bracket is selected as a low-level top coal caving hydraulic bracket; equipment used by the fully mechanized caving face is selected, so that the recovery rate of the fully mechanized caving face can be greatly increased, materials, working time and cost are saved, the construction efficiency is completely exerted, investment of staff, equipment, cost and work amount is effectively realized, the recovery rate of the fully mechanized caving face is increased, the coal mining efficiency can reach to above 93%, and an important effect is achieved on sustainable development of a mine.
Description
Technical field
The present invention relates to the coal-mining method of fully mechanized coal face, be specially the method that improves the fully mechanized coal face rate of extraction.
Background technology
According to statistics, the recovery ratio of China's fully mechanized coal face on average reaches 81%～83%, and according to coal industry policy, the recovery ratio of high seam stope must reach more than 93%, and therefore improving fully mechanized coal face recovery ratio is the important topic of being badly in need of solution; The coal-mining method of fully mechanized coal face generally is mining method now, and analyze according to mining Coal Loss, mining Coal Loss is aspect following two: be the loss that mining mining Design determines on the one hand, mainly that fully-mechanized mining working is arranged the unreasonable loss causing, the Coal Loss that mining technique causes on the other hand, coal breakage loss must be caused especially, a kind of method that fully mechanized coal face improves the rate of extraction need to be proposed.
Summary of the invention
The present invention, in order to solve the problem that the fully mechanized coal face rate of extraction is lower, provides the method that improves the fully mechanized coal face rate of extraction.
The present invention adopts following technical scheme to realize: the method that improves the fully mechanized coal face rate of extraction, front 20 meters of coal seam coal cuttings, after front 20 meters of coal seams, face roof is pressed, by a cutter one, put the coal mining activity that loops that many wheel intervening sequenceses are put coal, until work plane stops adopting first 60 meters of line, and when taking and placing ratio is more than or equal to 1:1.2 and is less than 1:1.1, drawing interval is at 0.8-1.2m, when taking and placing ratio is more than or equal to 1:1.1, drawing interval is at 0.6-0.8m, from stopping adopting line 60 meters to stopping adopting line, a coal cutting.
Drawing interval is the important parameter that affects drawing effectiveness, and approximately more than 60% coal is emitted by support coal discharge outlet, if drawing interval is too large, leaves Triangle Coal can not put out at goaf side, causes and loses in a large number coal; Fang Mei Walk is apart from too little, when the spoil of close goaf direction arrives coal discharge outlet, the coal at top has little time to arrive coal discharge outlet, by seeing that cash closes the principle of window, this part coal will be closed at coal discharge outlet to be lost in addition, as be not related to coal discharge outlet, a large amount of goafs spoil can pour in work plane, visible, only have the rational Fang Mei Walk of selection apart from improving top-coal recovery rate, reduce percentage of shale content, therefore the present invention is in conjunction with taking and placing ratio, optimize different taking and placing than corresponding drawing interval, reduced coal breakage loss, improved top-coal recovery rate.
The method of the above-mentioned raising fully mechanized coal face rate of extraction, caving roof coal hydraulic support is selected low caving coal hydraulic support, the model of the intermediate support in low caving coal hydraulic support is ZF15000/27.5/42, setting load is 12778KN, working resistance is 15000KN, structure height is 2750～4200MM, long * wide is 8600 * 1660MM or 8600 * 1860MM, excessively the model of support is ZFG13000/27.5/42, setting load is 10096KN, working resistance is 13000KN, structure height is 2750～4200MM, long * wide is 7800 * 1660MM or 7800 * 1860MM, the model of face end support is ZTZ20000/27.5/42, setting load is 15467KN, working resistance is 20000KN, structure height is 3000～4200MM, long * wide is 15106 * 32500MM.
Caving roof coal hydraulic support is the key equipment that fully mechanized coal face is mined, caving roof coal hydraulic support coal discharge outlet divides high, in, 3 kinds of low levels, high, meta caving roof coal hydraulic support, because drawing opening position is high, coal lower than coal discharge outlet bottom margin can not be put out, top-coal recovery rate is low, therefore low caving coal hydraulic support is that the frame that top coal recovery rate is the highest is capable, coal discharge outlet is also difficult for stopping up, drawing effectiveness is good, the tail boom of support is swingable, plate can be cut coarse coal, and the present invention optimizes model and the running parameter of low caving coal hydraulic support, these models and parameter are all drawn through great many of experiments by staff.
The method of the above-mentioned raising fully mechanized coal face rate of extraction, it is characterized in that fully mechanized coal face adopts following equipment: model is the coal-winning machine of Eickhoff SL-500, its power is 1715kw, ability is 2700t/h, voltage is 3.3kv, model is the front scrapping plate machine of PF6/1142, its power is 2 * 1050kw, ability is 2500t/h, voltage is 3.3kv, model is the rear scrapper conveyor of PF6/1342, its power is 2 * 1050kw, ability is 3000t/h, voltage is 3.3kv, model is the elevating conveyor of PF6/1542, its power is 600kw, ability is 3500t/h, voltage is 3.3kv, model is the leather belt head elevating conveyor of IMW60, its power is 600kw, ability is 3500t/h, voltage is 10kv, model is the crushing engine of SK1118, its power is 400kw, ability is 4250t/h, voltage is 3.3kv, model is the conveyor of DSJ140/350/3*500, its power is 3 * 500kw, ability is 3500t/h, voltage is 10kv, model is the emulsification pump of WRB400/31.5A, its power is 250kw, ability is 400L/min, voltage is 3.3kv, model is the atomizing pump of BPW315K1A, its power is 125kw, ability is 315L/min, voltage is 3.3kv.
The present invention has carried out preferably the model of fully-mechanized mining working device therefor, give full play to construction usefulness, the input that has effectively realized personnel, equipment, expense, engineering quantity, has improved the fully mechanized coal face rate of extraction, and the sustainable development of mine has been played an important role.
The present invention is preferred hydraulic support of top-coal saving face frame type and drawing interval, can improve greatly the rate of extraction of comprehensive coal face, both material, man-hour and expense had been saved, give full play to construction usefulness, effectively realized the input of personnel, equipment, expense, engineering quantity, improved the fully mechanized coal face rate of extraction, coal mining efficiency can reach more than 93%, and the sustainable development of mine is played an important role.Improve the rate of extraction of comprehensive extracting and caving face, can effectively alleviate present stage China's energy-intensive state at the more coal resources of unit interval energy output, its social benefit is apparent; Improve the comprehensive extracting and caving face rate of extraction and can reduce the coal that stays in goaf, reduced the hidden danger of goaf fire, saved fund input, significant to safety; The raising of the comprehensive extracting and caving face rate of extraction is from truly having realized the low input high repayment of work plane.
The specific embodiment
Improve the method for the fully mechanized coal face rate of extraction, front 20 meters of coal seam coal cuttings, after front 20 meters of coal seams, face roof is pressed, by a cutter one, put the coal mining activity that loops that many wheel intervening sequenceses are put coal, until stop adopting first 60 meters of line to work plane, and taking and placing ratio being when being more than or equal to 1:1.2 and being less than 1:1.1, and drawing interval is at 0.8-1.2m, when taking and placing ratio is more than or equal to 1:1.1, drawing interval is at 0.6-0.8m, from stopping adopting line 60 meters to stopping adopting line, a coal cutting.
The method of the above-mentioned raising fully mechanized coal face rate of extraction, caving roof coal hydraulic support is selected low caving coal hydraulic support, the model of the intermediate support in low caving coal hydraulic support is ZF15000/27.5/42, setting load is 12778KN, working resistance is 15000KN, structure height is 2750～4200MM, long * wide is 8600 * 1660MM or 8600 * 1860MM, excessively the model of support is ZFG13000/27.5/42, setting load is 10096KN, working resistance is 13000KN, structure height is 2750～4200MM, long * wide is 7800 * 1660MM or 7800 * 1860MM, the model of face end support is ZTZ20000/27.5/42, setting load is 15467KN, working resistance is 20000KN, structure height is 3000～4200MM, long * wide is 15106 * 32500MM.
The method of the above-mentioned raising fully mechanized coal face rate of extraction, fully mechanized coal face adopts following equipment: model is the coal-winning machine of Eickhoff SL-500, its power is 1715kw, ability is 2700t/h, voltage is 3.3kv, model is the front scrapping plate machine of PF6/1142, its power is 2 * 1050kw, ability is 2500t/h, voltage is 3.3kv, model is the rear scrapper conveyor of PF6/1342, its power is 2 * 1050kw, ability is 3000t/h, voltage is 3.3kv, model is the elevating conveyor of PF6/1542, its power is 600kw, ability is 3500t/h, voltage is 3.3kv, model is the leather belt head elevating conveyor of IMW60, its power is 600kw, ability is 3500t/h, voltage is 10kv, model is the crushing engine of SK1118, its power is 400kw, ability is 4250t/h, voltage is 3.3kv, model is the conveyor of DSJ140/350/3*500, its power is 3 * 500kw, ability is 3500t/h, voltage is 10kv, model is the emulsification pump of WRB400/31.5A, its power is 250kw, ability is 400L/min, voltage is 3.3kv, model is the atomizing pump of BPW315K1A, its power is 125kw, ability is 315L/min, voltage is 3.3kv.
Claims (3)
1. improve the method for the fully mechanized coal face rate of extraction, it is characterized in that front 20 meters of coal seam coal cuttings, after front 20 meters of coal seams, face roof is pressed, by a cutter one, put the coal mining activity that loops that many wheel intervening sequenceses are put coal, until stop adopting first 60 meters of line to work plane, and taking and placing ratio being when being more than or equal to 1:1.2 and being less than 1:1.1, and drawing interval is at 0.8-1.2m, when taking and placing ratio is more than or equal to 1:1.1, drawing interval is at 0.6-0.8m, from stopping adopting line 60 meters to stopping adopting line, a coal cutting.
According to right to go described in 1 the method for the raising fully mechanized coal face rate of extraction, it is characterized in that caving roof coal hydraulic support selection low caving coal hydraulic support, the model of the intermediate support in low caving coal hydraulic support is ZF15000/27.5/42, setting load is 12778KN, working resistance is 15000KN, structure height is 2750～4200MM, long * wide is 8600 * 1660MM or 8600 * 1860MM, excessively the model of support is ZFG13000/27.5/42, setting load is 10096KN, working resistance is 13000KN, structure height is 2750～4200MM, long * wide is 7800 * 1660MM or 7800 * 1860MM, the model of face end support is ZTZ20000/27.5/42, setting load is 15467KN, working resistance is 20000KN, structure height is 3000～4200MM, long * wide is 15106 * 32500MM.
3. the method for the raising fully mechanized coal face rate of extraction according to claim 1 and 2, it is characterized in that fully mechanized coal face adopts following equipment: model is the coal-winning machine of Eickhoff SL-500, its power is 1715kw, ability is 2700t/h, voltage is 3.3kv, model is the front scrapping plate machine of PF6/1142, its power is 2 * 1050kw, ability is 2500t/h, voltage is 3.3kv, model is the rear scrapper conveyor of PF6/1342, its power is 2 * 1050kw, ability is 3000t/h, voltage is 3.3kv, model is the elevating conveyor of PF6/1542, its power is 600kw, ability is 3500t/h, voltage is 3.3kv, model is the leather belt head elevating conveyor of IMW60, its power is 600kw, ability is 3500t/h, voltage is 10kv, model is the crushing engine of SK1118, its power is 400kw, ability is 4250t/h, voltage is 3.3kv, model is the conveyor of DSJ140/350/3*500, its power is 3 * 500kw, ability is 3500t/h, voltage is 10kv, model is the emulsification pump of WRB400/31.5A, its power is 250kw, ability is 400L/min, voltage is 3.3kv, model is the atomizing pump of BPW315K1A, its power is 125kw, ability is 315L/min, voltage is 3.3kv.
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Cited By (4)
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| CN104153780A (en) * | 2014-07-28 | 2014-11-19 | 鞍钢集团矿业公司 | Sublevel caving shrinkage continuous recovery process for thin ore body |
| CN105604551A (en) * | 2015-12-21 | 2016-05-25 | 中国神华能源股份有限公司 | Large mining height full-mechanized caving mining method |
| CN109488301A (en) * | 2018-09-30 | 2019-03-19 | 中国矿业大学 | A kind of mine, which picks up, fills place's recovery method |
| CN116122814A (en) * | 2022-12-30 | 2023-05-16 | 天地上海采掘装备科技有限公司 | Coal mining machine type selection method, system and storage medium |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153780A (en) * | 2014-07-28 | 2014-11-19 | 鞍钢集团矿业公司 | Sublevel caving shrinkage continuous recovery process for thin ore body |
| CN104153780B (en) * | 2014-07-28 | 2016-06-01 | 鞍钢集团矿业公司 | Lean ore body sublevel caving stays ore deposit continuous stoping technique |
| CN105604551A (en) * | 2015-12-21 | 2016-05-25 | 中国神华能源股份有限公司 | Large mining height full-mechanized caving mining method |
| CN109488301A (en) * | 2018-09-30 | 2019-03-19 | 中国矿业大学 | A kind of mine, which picks up, fills place's recovery method |
| RU2724161C1 (en) * | 2018-09-30 | 2020-06-22 | Китайский Университет Горного Дела И Технологии | Method for mine development of deposits, separation of rocks, filling of mined space and dressing of ore |
| CN116122814A (en) * | 2022-12-30 | 2023-05-16 | 天地上海采掘装备科技有限公司 | Coal mining machine type selection method, system and storage medium |
| CN116122814B (en) * | 2022-12-30 | 2024-01-23 | 天地上海采掘装备科技有限公司 | Coal mining machine type selection method, system and storage medium |
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Application publication date: 20140402 |