CN104088639A - Large-inclination angle thick coal seam strike long-wall workface large-mining height mining method - Google Patents
Large-inclination angle thick coal seam strike long-wall workface large-mining height mining method Download PDFInfo
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Abstract
The invention discloses a large-inclination angle thick coal seam strike long-wall workface large-mining height mining method. The method comprises the following steps: selecting a false-inclined strike long-wall workface as an actual mining workface of a large-inclination angle thick coal seam, wherein the included angle of the workface and a real inclined workface is about 0-7 degrees and the inclination length of the workface is larger than 80m; mounting a special totally-closed lower end bracket and a tail bracket on a conveying alley end at the lower end of the workface, sequentially arranging a scraper conveyer, a coal miner and a two-column covered type or four-column covered type hydraulic bracket along the inclination direction of the workface, mining the large-inclination angle coal seam by taking the strike of the large-inclination angle coal seam as a push direction, allowing the coal miner on the workface to obliquely cut triangular coal by use of a feed cutter and move down, namely cutting the coal from an air returning alley to the conveying alley, moving upwards, namely clearing away float coal from the conveying alley to the air returning alley, and sequentially moving the brackets and pushing forwards the conveyer from bottom to top, wherein one technical loop is finished after the float coal is cleared by the coal miner. The method disclosed by the invention has the beneficial effect of maintaining the stability of a system during a mining process.
Description
Technical field
The invention belongs to seam mining technical field, relate to a kind of face in steep thick coal seam and move towards the large mining height exploitation method in coal wall.
Background technology
Large-inclination-angle coal bed is to tilt and the part of steeply pitching seam, generally refers to that burying inclination angle is the coal seam of 35～55 °, is the generally acknowledged difficult mining coal seam in coal seam and international mining circle of the special mode of occurence of a class.When longwell (be in tilted layout, move towards advance) working face mining is moved towards in employing, caved gangue non-uniform placement, bearing pressure asymmetric distribution, bottom deformation and destruction possibility in work plane goaf along inclined direction increase and work plane " top board-support-base plate " system unstability and cause catastrophe etc.
Due to large-inclination-angle coal bed These characteristics, at present, fully-mechanized mining can only be applied among the medium-thickness seam of 1.3～3.5m, high seam generally adopts Coal Mining Equipment Complement, these class methods exist that roof control difficulty, top coal coal caving ratio are low, work plane " support-country rock " (top board-support-base plate) stability of a system is difficult for the problems such as guarantee, cannot ensure safety and high efficiency.Solve above face in steep thick coal seam and move towards the series of problems that longwell comprehensive mechanical top coal caving exists, must arrange and work plane relevant equipment is started with and studied from work plane, adopt the large-inclination-angle coal bed method of moving towards the large mining height of longwell (full-seam mining) to exploit such coal seam.
Summary of the invention
The object of the present invention is to provide a kind of face in steep thick coal seam to move towards the large mining height exploitation method in coal wall, solved the existing stability of a system and be difficult for the problem ensureing.
The technical solution adopted in the present invention is to carry out according to following steps:
Step 1: work plane is determined: select a puppet to face upward and tiltedly move towards coal wall as the actual exploitation of face in steep thick coal seam work plane, the angle of work plane and true dip work plane is about 0 °～7 °, and work plane tilt length is greater than 80m;
Step 2: work plane is arranged: at the transport heading of work plane lower end, totally-enclosed special lower end support and last person's support are installed, arrange successively drag conveyor, coal-winning machine and two column protected type or four post support shield type hydraulic support along work plane incline direction, return air heading at work plane upper end is installed crab bearer, upper end support, in transport lane, be provided with advance support and support lower end support, advance support is set in return airway and is used for supporting upper end support;
Step 3: seam mining method: adopt the exploitation of fully-mechanized mining full-seam mining exploitation method, taking the determined work plane of step 1 as actual exploitation work plane, and exploit large-inclination-angle coal bed taking large-inclination-angle coal bed trend as direction of propulsion, the coal-winning machine of work plane stays the Triangle Coal feed of cutting sth. askew descending, from return airway to transport lane direction coal cutting, up from transporting lane to the clear float coal of return airway direction, order is moved frame, pushing and sliding from bottom to top, unit advance and coal-winning machine cut the dark 0.6m of being, and the clear complete float coal of coal-winning machine completes a process cycles.
Further, in described step 2, in the time that face length changes, setting up flexible transition supporting at work plane upper end place regulates.
While the invention has the beneficial effects as follows maintenance exploitation, system is stable.
Brief description of the drawings
Fig. 1 is that puppet is faced upward slanting face layout schematic diagram;
Fig. 2 is that work plane of the present invention is arranged top view;
Fig. 3 is the A-A sectional drawing of Fig. 2.
In figure: 1-return airway, 2-transports lane, 3-work plane, 4-goaf, 5-advance support; 6-upper end support, 7-crab bearer, 8-last person's support, 9-lower end support, 10-hydraulic support, 11-coal-winning machine, 12-drag conveyor, 13-seat earth, 14-coal seam, 15-roof.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
The method that the present invention adopts is: step 1: work plane 3 is determined: work plane 3 is that puppet is faced upward slanting face, select a puppet to face upward and tiltedly move towards coal wall as the actual exploitation of described face in steep thick coal seam work plane, puppet is faced upward slanting face 3 and is about 0 °～7 ° with the angle of true dip work plane, and work plane tilt length is greater than 80m;
As shown in Figure 1, AD is that puppet is faced upward slanting face 3, and work plane tilt length is greater than 80m, and ∠ ACB is true dip angle, i.e. seam inclination α, and ∠ ADB is pseudo-inclination angle, ∠ CAD is that pseudo-slanting face is 0 °～7 ° with moving towards angular separation (abbreviation moves towards angle), L
veryfor true dip length, L
pseudo-for pseudo-tilt length, be greater than 80m, DC direction is that work plane moves towards direction of propulsion, CA direction is incline direction.
Step 2: the layout of mining equipment: in actual recovery process, pseudo-slanting face angle ∠ CAD, between 0 °～7 °, has reduced the downslide of large mining height process medium-height trestle and equipment, meanwhile, coal wall caving possibility can appropriately reduce large mining height time.
Wherein, in the goaf 4 in Fig. 2, Fig. 3, seat earth 13, coal seam 14 and roof 15 have formed whole bank.
As Fig. 2, shown in 3, face upward in puppet transport lane 2 ends that slanting face is work plane 3 lower ends, totally-enclosed special lower end support 9 and last person's support 8 are installed, arrange successively drag conveyor 12 along work plane incline direction, coal-winning machine 11 and two column protected type or four post support shield type hydraulic support 10, return airway 1 end at work plane 3 upper ends is installed crab bearer 7, upper end support 6, in transport lane 2, be provided with advance support 5 and support lower end support 9, be used for supporting upper end support 6 at the interior advance support 5 that arranges of return airway 1, in the time of work plane 3 change in length, can set up at work plane 3 upper end places flexible transition supporting regulates, the face 3 of finishing the work is arranged,
Step 3: seam mining method: adopt the exploitation of fully-mechanized mining full-seam mining exploitation method, face upward slanting face as actual exploitation work plane taking the determined puppet of step 1, and exploit large-inclination-angle coal bed taking described large-inclination-angle coal bed trend as direction of propulsion; Work plane 3 direction of propulsion are shown in Fig. 2, the coal-winning machine 11 of work plane 3 stays the Triangle Coal feed of cutting sth. askew descending, from return airway 1 to transport lane 2 direction coal cuttings, up from transporting lane 2 to the clear float coal of return airway 1 direction, order is moved frame, pushing and sliding from bottom to top, unit advance and coal-winning machine cut the dark 0.6m of being, and the clear complete float coal of coal-winning machine completes a process cycles.
And in actual recovery process, adopt force piece to carry out synchronous supporting to reality exploitation work plane, described force piece is two column protected type or four post support shield type hydraulic support, support adopts high thrust jack and box side guard board, adjust jack linkage or separately stretch out or retract at the end, be convenient to align support, and use the anti-coal wall caving of large area face guard, protective baffle plate Jiang Ji road and sidewalk separate, work plane coal breakage adopts double-ended shearer, work plane transport adopts large transport power drag conveyor, work plane utilizes " three machines " (coal-winning machine, drag conveyor, support) coordinate and install additional special equipment prevent mining face equipment glide.
The above-mentioned large-inclination-angle coal bed large mining height exploitation method in coal wall of moving towards, is characterized in that:
(1) as shown in Figure 3, one time mining height H reaches the coal seam of 35 °～55 ° at the seam inclination a of 3.5～5.0m, is applicable to exploit thick and special thick large-inclination-angle coal bed.
(2) work plane two column protected type or four post support shield type hydraulic support, support adopts high thrust jack and box side guard board, and working resistance reaches 6500kN, and adjust jack linkage or separately stretch out or retract at the end, is convenient to align support; Bracket support height 2.2～5.0m, support self width b is 1.75～2.0m, and uses the anti-coal wall caving of large area face guard (1.75～2.0m × 1.5m), protective baffle plate Jiang Ji road and sidewalk to separate; Work plane double-ended shearer diameter of cylinder D is 1.8～2.3m; Working face conveyor power is not less than 900kW; Work plane utilizes " three machines " (coal-winning machine, drag conveyor, support) to coordinate and installs special equipment additional and prevents that mining face equipment from gliding.
Described force piece is two column protected type or four post support shield type hydraulic support 10, support adopts high thrust jack and box side guard board, adjust jack linkage or separately stretch out or retract at the end, be convenient to align support, and use the anti-coal wall caving of large area face guard, protective baffle plate Jiang Ji road and sidewalk to separate, work plane coal breakage adopts double-ended shearer 11, work plane transports to adopt large transport power drag conveyor 12, work plane utilization " three machines " (coal-winning machine, drag conveyor, support) to coordinate and install special equipment additional and prevents that mining face equipment from gliding.
To sum up, in actual recovery process, actual exploitation work plane is that pseudo-oblique angle ∠ CAD is that the puppet of 0 °～7 ° is faced upward tilted direction and arranged, and advances along coal seam; Actual exploitation work plane is selected the two column protected type or the four post support shield type hydraulic support that are added with special shielding equipment, and supporting double-ended shearer, large transport power drag conveyor, lower end support etc.Ensure that the large mining height of high inclination-angle moves towards coal wall safety and high efficiency.
The above, be only preferred embodiments of the present invention, not the present invention imposed any restrictions, and every any simple modification of above example being done according to invention technical spirit, change and equivalent structure change, and all still belong in the protection domain of technical solution of the present invention.
The present invention has the following advantages:
(1) the simple constructability of reasonable in design, exploitation method.
(2) ensured that a large-inclination-angle coal bed mining height reaches 3.5～5.0m, increased substantially the resource recovery of exploiting such thickness coal seam, simplified process for stoping.
(3) under the high inclination-angle condition adopting, large mining height hydraulic support and outfit can ensure the stability in mining height 3.5～5.0m, 35 °～55 ° work planes in inclination angle " support-country rock " system, and while having overcome employing top coal caving, " top board-support-base plate " system element lack the support equipment downslide causing and topples over problem.
In sum, the present invention is reasonable in design, exploitation method is simple, easy construction and the large mining height hydraulic support adopting and outfit reasonable in design, easy and simple to handle, result of use good, can effectively solve that the rate of extraction existing in existing face in steep thick coal seam top coal caving is low, the practical problem such as complex process, support system are unstable.Exploitation method is simple, easy construction and the large mining height hydraulic support adopting and outfit reasonable in design, easy and simple to handle, result of use good, the practical problem such as can effectively solve that the rate of extraction existing in existing face in steep thick coal seam top coal caving is low, complex process, support system are unstable.
Claims (2)
1. face in steep thick coal seam moves towards the large mining height exploitation method in coal wall, it is characterized in that carrying out according to following steps:
Step 1: work plane (3) is determined: select a puppet to face upward and tiltedly move towards coal wall as the actual exploitation of face in steep thick coal seam work plane, work plane (3) is about 0 °～7 ° with the angle of true dip work plane, and work plane tilt length is greater than 80m;
Step 2: work plane (3) is arranged: at the transport lane (2) of work plane (3) lower end end, totally-enclosed special lower end support (9) and last person's support (8) are installed, arrange successively drag conveyor (12) along work plane incline direction, coal-winning machine (11) and two column protected type or four post support shield type hydraulic support (10), return airway (1) end at work plane (3) upper end is installed crab bearer (7), upper end support (6), in transport lane (2), be provided with advance support (5) and support lower end support (9), advance support (5) is set in return airway (1) and is used for supporting upper end support (6),
Step 3: seam mining method: adopt the exploitation of fully-mechanized mining full-seam mining exploitation method, taking the determined work plane of step 1 (3) as actual exploitation work plane, and exploit large-inclination-angle coal bed taking large-inclination-angle coal bed trend as direction of propulsion, the coal-winning machine (11) of work plane (3) stays the Triangle Coal feed of cutting sth. askew descending, from return airway (1) to transport lane (2) direction coal cutting, up from transporting lane (2) to the clear float coal of return airway (1) direction, order is moved frame from bottom to top, pushing and sliding, unit advance and coal-winning machine cut the dark 0.6m of being, the clear complete float coal of coal-winning machine completes a process cycles.
2. move towards the large mining height exploitation method in coal wall according to a kind of face in steep thick coal seam described in claim 1, it is characterized in that in described step 2, setting up flexible transition supporting in the time of work plane (3) change in length at work plane (3) upper end place regulates.
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Cited By (14)
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| CN104847351A (en) * | 2015-05-31 | 2015-08-19 | 西安科技大学 | Three-dimensional roof controlling method for fully mechanized caving of steeply inclined and extremely thick coal seam |
| CN104929642A (en) * | 2015-06-03 | 2015-09-23 | 西安科技大学 | Top coal caving quantity regional control method for variable angle fully mechanized caving face of steeply dipping seam |
| CN105134215A (en) * | 2015-09-25 | 2015-12-09 | 西安科技大学 | Local filling mining method for longwall face along strike of steeply dipping seam |
| CN105484783A (en) * | 2015-12-04 | 2016-04-13 | 西安科技大学 | Parallelogram hydraulic support suitable for large-dip-angle coal-seam long-wall false dipping working face |
| CN105649628A (en) * | 2016-01-15 | 2016-06-08 | 西安科技大学 | False-inclined inclination-angle-variable arrangement method for large-dip-angle coal seam angle-variable fully-mechanized coal mining/caving working face |
| CN107605531A (en) * | 2017-08-01 | 2018-01-19 | 天地（常州）自动化股份有限公司 | The gridding division methods of fully-mechanized mining working |
| CN108374660A (en) * | 2018-03-26 | 2018-08-07 | 四川川煤华荣能源股份有限公司 | Face in steep thick coal seam recovery method |
| CN108547658A (en) * | 2018-03-20 | 2018-09-18 | 四川省安全科学技术研究院 | A kind of high inclination-angle ultra-thin coal seam spoil is from slipping backfilling goaf method |
| CN110273686A (en) * | 2019-08-05 | 2019-09-24 | 四川川煤华荣能源股份有限公司 | High inclination-angle structure is complicated thick seam large mining high comprehensive mining process for stoping |
| CN111734479A (en) * | 2020-06-08 | 2020-10-02 | 扎赉诺尔煤业有限责任公司 | Lapping material transportation system for lapping mining working face |
| CN111734412A (en) * | 2020-06-08 | 2020-10-02 | 扎赉诺尔煤业有限责任公司 | Thick coal seam layered lapping mining working face equipment model selection matching type |
| CN112943248A (en) * | 2021-03-17 | 2021-06-11 | 西安科技大学 | Mining method for inclined layered solid deposit |
| CN112983422A (en) * | 2021-03-17 | 2021-06-18 | 西安科技大学 | Ore drawing mining method for inclined layered solid deposit |
| CN114412500A (en) * | 2021-12-13 | 2022-04-29 | 国家能源集团宁夏煤业有限责任公司枣泉煤矿 | Coal face top roof supporting device |
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| CN104847351B (en) * | 2015-05-31 | 2017-07-25 | 西安科技大学 | A kind of severe inclined thick coal seam longwall top coal caving controls top method with three-dimensional |
| CN104847351A (en) * | 2015-05-31 | 2015-08-19 | 西安科技大学 | Three-dimensional roof controlling method for fully mechanized caving of steeply inclined and extremely thick coal seam |
| CN104929642A (en) * | 2015-06-03 | 2015-09-23 | 西安科技大学 | Top coal caving quantity regional control method for variable angle fully mechanized caving face of steeply dipping seam |
| CN104929642B (en) * | 2015-06-03 | 2017-05-10 | 西安科技大学 | Top coal caving quantity regional control method for variable angle fully mechanized caving face of steeply dipping seam |
| CN105134215A (en) * | 2015-09-25 | 2015-12-09 | 西安科技大学 | Local filling mining method for longwall face along strike of steeply dipping seam |
| CN105484783A (en) * | 2015-12-04 | 2016-04-13 | 西安科技大学 | Parallelogram hydraulic support suitable for large-dip-angle coal-seam long-wall false dipping working face |
| CN105649628B (en) * | 2016-01-15 | 2018-07-10 | 西安科技大学 | The large-inclination-angle coal bed comprehensive coal mining caving working face puppet of varied angle, which is faced upward, tiltedly becomes inclination angle method for arranging |
| CN105649628A (en) * | 2016-01-15 | 2016-06-08 | 西安科技大学 | False-inclined inclination-angle-variable arrangement method for large-dip-angle coal seam angle-variable fully-mechanized coal mining/caving working face |
| CN107605531A (en) * | 2017-08-01 | 2018-01-19 | 天地（常州）自动化股份有限公司 | The gridding division methods of fully-mechanized mining working |
| CN108547658A (en) * | 2018-03-20 | 2018-09-18 | 四川省安全科学技术研究院 | A kind of high inclination-angle ultra-thin coal seam spoil is from slipping backfilling goaf method |
| CN108374660A (en) * | 2018-03-26 | 2018-08-07 | 四川川煤华荣能源股份有限公司 | Face in steep thick coal seam recovery method |
| CN110273686A (en) * | 2019-08-05 | 2019-09-24 | 四川川煤华荣能源股份有限公司 | High inclination-angle structure is complicated thick seam large mining high comprehensive mining process for stoping |
| CN111734479A (en) * | 2020-06-08 | 2020-10-02 | 扎赉诺尔煤业有限责任公司 | Lapping material transportation system for lapping mining working face |
| CN111734412A (en) * | 2020-06-08 | 2020-10-02 | 扎赉诺尔煤业有限责任公司 | Thick coal seam layered lapping mining working face equipment model selection matching type |
| CN112943248A (en) * | 2021-03-17 | 2021-06-11 | 西安科技大学 | Mining method for inclined layered solid deposit |
| CN112983422A (en) * | 2021-03-17 | 2021-06-18 | 西安科技大学 | Ore drawing mining method for inclined layered solid deposit |
| CN114412500A (en) * | 2021-12-13 | 2022-04-29 | 国家能源集团宁夏煤业有限责任公司枣泉煤矿 | Coal face top roof supporting device |
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Application publication date: 20141008 |