CN101737047A

CN101737047A - Method for mining coal of steeply inclined thin seam

Info

Publication number: CN101737047A
Application number: CN200810137558A
Authority: CN
Inventors: 孙广义; 陈刚; 张俊文; 董长吉; 张继忠; 兰永伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-11-19
Filing date: 2008-11-19
Publication date: 2010-06-16

Abstract

The invention provides a method for mining coal of a steeply inclined thin seam on the basis of learning from a long-hole blasting coal mining method and a wire saw coal mining method, which is a long-hole blasting and wire saw coal mining method and relates to underground coal mining. The method comprises the following steps: long boreholes are arranged in a direction which is parallel to the cross pitch of the coal seam for coal blasting; after finishing blasting a work surface, making the coal slip out from a section coal bin and loading the coal for outward transport through a haulage drift; and when blasting to the vicinity of a tailgate through the long boreholes, stopping the blasting and utilizing a wire saw to mine remaining coal. The method has the advantages of no work surface support, rational tunnel arrangement, simple ventilation management, the capacity of realizing unmanned work surface mining, low cost, strong security, high coal mining rate, low worker labor intensity, good social and economic benefits and the like.

Description

A kind of coal-mining method of steeply inclined thin seam

Technical field:

The present invention relates to the exploitation method of the exploitation method of coal, particularly a kind of steeply inclined thin seam.

Background technology:

For the exploitation steeply inclined thin seam, mainly contain overhand mining at present, bow pseudo-tiltedly strike long wall method, wire saw coal-mining method and flexible type shield coal-mining method.Overhand mining is because labour intensity is big, and productivity ratio is low, and roof control work amount is big, and gas such as is easy to gather at characteristics, uses fewer and feweri at present.The pseudo-tiltedly strike long wall method of bowing has that work plane props up, the prop drawing workload is bigger, and the workman operates inconvenience, and labour intensity is big, and the section coal pillar loss is bigger, the shortcoming that cost is high.It is big that shrinkage stoping has workman's workload, and the easy wall caving of rib is hurted sb.'s feelings, poor stability, defective such as recovery ratio is low.Though the wire saw coal-mining method has been realized the manless working face exploitation, it is only applicable to the softer coal seam of ature of coal.The flexible type shield coal-mining method is owing to characteristics such as occurrence bad adaptability such as coal seam thickness, inclination angles, also be restricted its application.

Summary of the invention:

In order to solve above deficiency, the object of the present invention is to provide a kind of cost low, high safety, recovery ratio height, labour intensity is low, can adapt to coal seam thickness, inclination angle variation, the coal-mining method of manless working face exploitation is referred to as slotted hole blasting wire saw coal-mining method, and the content of this coal-mining method invention mainly comprises:

1, adopted horizontal drilling along bearing, boring is 12-13m deeply;

2, realized the manless working face exploitation, top board does not need supporting, and cost is low.

3, ventilation system is simple, is into five times, and full exhaust ventilation helps the goaf gas discharging.

4, on the basis of horizontal slotted hole blasting, increase wire saw, can improve coal recovery rate.

Description of drawings:

Fig. 1 is a slotted hole blasting wire saw coal-mining method roadway arrangement plan view of the present invention

A sectional drawing is arranged: the A-A sectional drawing among Fig. 1

Among the figure: the 1-tailgate; The 2-haulage way; 3-perforating inclined gallery; 4-air intake pedestrian inclined gallery; The 5-long drilled holes; The 6-milling coal hole; The 7-directive wheel; The 8-wire saw; The leading lane of 9-.

The specific embodiment:

1, at first tunnels the transportation and the tailgate of stope.After transportation and tailgate tunneled near the open-off cut, (from haulage way to the tailgate direction) tunneled perforating inclined gallery and air intake pedestrian inclined gallery from bottom to top, until tailgate.Perforating inclined gallery height is a coal seam thickness, width 1～2m.5～6m place begins the driving face fore drift above haulage way simultaneously, and the fore drift height tunnels along coal seam thickness, more than the width 3m.The fore drift connects every 5～6m driving milling coal hole and haulage way.After an inclined strip is tunneled in the fore drift, upwards tunnel perforating inclined gallery and two air intake pedestrian inclined gallery again until tailgate, form production system from haulage way.Distance between haulage way and the tailgate is determined according to the seam mining condition, general 30～50m.Each inclined strip length 25～30m.

2, will saw cutter by open-off cut, fore drift is connected with winch haulage cable in tailgate, the haulage way with the saw rope.Pull rope adopts the above wire rope of diameter 22mm as pull rope, and the saw rope rope footpath between the saw cutter can be slightly less than pull rope, and carries the short rope of growing into 2～2.5 meters and saw cutter and be connected.

3, after Working face Production System is ready to complete, utilize rig (wind coal borer) horizontal perforating in work plane in two perforating inclined gallery, the dark 12～13m of eye utilizes the jointed rod perforating.Borehole diameter 42mm then, carries out spaced loading, explosion to borehole.Every dozen of eyes, charge explosion once arrive tailgate until the perforating explosion.

4, in haulage way, the loose coal in the work plane is emitted by milling coal hole, and the entrucking outward transport, roof is inbreak along with emitting of coal.

When 5, treating slotted hole blasting to tailgate, open the wire saw winch, the haulage cable saw is at work plane back and forth movement extraction residue coal.

Claims

1. the coal-mining method of a steeply inclined thin seam promptly is a slotted hole blasting wire saw coal-mining method, it is characterized in that: said slotted hole is to adopt the horizontal drilling (5) that is parallel to bearing, and said wire saw is to be used for extraction residue coal.

2. horizontal drilling according to claim 1 (5) is characterized in that: the horizontal drilling flat drill eye of fetching water from two inclined gallery (3), borehole are that single eye is arranged, the dark 12～13m of eye.

3. slotted hole blasting according to claim 1 is characterized in that: utilize rig or the perforating of wind coal borer jointed rod, borehole diameter 42mm carries out spaced loading, explosion to borehole.Every dozen of eyes, charge explosion once arrive tailgate (1) until the perforating explosion.

4. according to the horizontal drilling shown in the claim 2 (5), it is characterized in that: two horizontal drilling eyeground of same absolute altitude are at a distance of 2～3m.

5. two inclined gallery according to claim 2 (3) is characterized in that: two inclined gallery (3) along seam inclination upwards from haulage way (2) to tailgate (1) driving, inclined gallery along bearing at a distance of 25～30m.

6. haulage way according to claim 5 (2) and tailgate (1) is characterized in that: haulage way (2) is inclined at a distance of 30～50m along the coal seam with tailgate (1).

7. wire saw according to claim 1 (8) is characterized in that: treat the perforating explosion from the fore drift (9) when tailgate (1) finishes, just use, pull rope adopts the above wire rope of diameter 22mm as pull rope.