CN1069946C

CN1069946C - Method for mining on near water-level very thin coal seam manless operating face

Info

Publication number: CN1069946C
Application number: CN98110118A
Authority: CN
Inventors: 翟德元; 姜培旺; 王祥胜
Original assignee: MINING INST SHANDONG MINING INDUSTRY COLLEGE
Current assignee: MINING INST SHANDONG MINING INDUSTRY COLLEGE
Priority date: 1998-03-18
Filing date: 1998-03-18
Publication date: 2001-08-22
Anticipated expiration: 2018-03-18
Also published as: CN1229165A

Abstract

The present invention relates to a method for mining on the manless operating face of a very thin coal seam, particularly to a near water-level very thin coal seam. The present invention is characterized in that deep blast holes are drilled parallel to the operating face of a coal seam; the deep blast holes are connected in series by a blasting fuse for loading powder at intervals; coal is blasted down by blasting once; then, the coal is conveyed to a conveying flat roadway by a screw coal conveyer. Workers only need to operate the processes in a roadway without entering the operating face, and therefore, the present invention solves the problem of mining the very thin coal seam, achieves the purpose of reclaiming underground resources with high safety and high efficiency and solves the difficult problems of production and digging for old ore districts.

Description

Method for mining near water-level very thin coal seam manless operating face

The invention belongs to the exploitation method of underground coal, relate to the special exploitation of ultra-thin coal seam.

In the underground mining of colliery, the condition of coal seam occurrence complexity, for the coal seam more than 0.5 meter, existing both at home and abroad ripe exploitation method, or coal-winning machine mechanical coal mining, or artificial big gun is adopted.But less than the ultra-thin coal seam below 0.5 meter, and the inclination angle is less than 10 ° near horizontal ultra-thin coal seam for coal seam thickness, is difficult to realize that mechanical mining and big gun adopt the significant wastage that causes resource.China's easy mining coal seam in a lot of old mining areas has been adopted to the greatest extent, all is faced with the problem of the exploitation of ultra-thin coal seam, is sought after a kind of new exploitation method.

Purpose of the present invention provides the particularly exploitation method of nearly horizontal ultra-thin coal seam of a kind of ultra-thin coal seam.This method can be come out coal mining under the operatorless situation of work plane, plays the purpose that economic security reclaims subterranean resource.

Realize that technical scheme of the present invention is as follows:

One,,, carries out development heading and arrange along the bearing face of assigning a work at first as the seam mining of general condition; Promptly above pre-mining face, open up tailgate, below developing haulage way, selected according to condition on the ore deposit, haulage way deployment rails mine car, scraper plate machine or conveyor etc., selected according to condition on the ore deposit; Carry out artificial open-off cut by conventional method then, promptly manually get through work plane.

Two, installation work face coal handling system

The work plane coal handling system comprises screw coal conveyer, track flat car, temporary track, pulling equipment etc.Wherein screw coal conveyer is to realize key equipment of the present invention, and its structure will be described later.

1. respectively lay temporary track at tailgate, haulage way, install the track flat car, all arrange pulling equipment in the work plane direction of advance.

2. the flat car of tailgate installs and fixes coal conveyor tail seat, and the flat car of haulage way installs and fixes the coal conveyor head.

With the screw coal conveyer cylinder from cutting eye top one and connect gradually successively and pushing away along cutting now, until exposing first segment, be connected with the power output shaft of screw conveyer head with flange at haulage way; The afterbody of the last joint of cylinder is installed on the tail seat of return airway side.

Three, deep hole blasting coal breakage technology

1. drilling deep hole borehole.Arrange drilling cramp and rig in a tunnel therein, rig can adopt powerful electric coal drill, adopts spreading formula drilling rod, is parallel to work plane drilling deep hole borehole in the coal seam, until boring saturating opposite side tunnel;

2. filling explosive.Adopt the spaced loading structure, packing method can adopt following any:

(1) explosive cartridge is bundled at interval on the thin ropy and detonating fuse on, one of cord is bundled on the drilling rod that does not withdraw from, along with withdrawing from of drilling rod gone into borehole with string powder charge volume tractive, tractive limit, limit bundlees explosive cartridge, up to running through whole borehole;

(2) explosive cartridge is bundled on detonating fuse and the elongate rod at interval, pushes borehole from the top downwards, the limit pushes long thin bar of edge joint and binding powder stick, up to running through whole borehole;

The explosive package is finished, and exposes the detonating fuse head, borehole two shutoff stemming.

3. coal blasting.Bundle detonator on the detonating fuse head that exposes, device is ignited in-place blasting out work plane coal seam with firing.

Four, coal-face coal course of conveying

1. start screw coal conveyer after the explosion, make work plane coal revolve to push to carry and fall on the haulage device of haulage way at helical blade;

2. when starting screw coal conveyer, constantly start the puffer in tailgate and the haulage way, coal conveyor is constantly advanced to work plane the place ahead,, finish first periodic duty until quick-fried loose coal is all transferred out work plane.

Five, coal-face normal cyclic operation

Connect first circulation, repeat above-mentioned deep hole blasting coal breakage technology and coal-face coal course of conveying, the circulation that goes round and begins again advances, until adopting complete design coal mining section.

Six, realizing key equipment of the present invention, is to have designed the defeated coal task that screw coal conveyer is finished coal-face.This coal conveyor structure is made up of head, tail and spiral cylinder.Head comprises power motor and reducer, and the power output shaft of reducer is connected with the cylinder head with flange; Cylinder tail jack connection tailstock; Cylinder is to weld helical blade on the tubulose hub, and is provided with base and arc spillplate; For the ease of installing, be designed to the more piece jointing type, joint with save between employing activity socket connect easy installation and removal.

Good effect of the present invention is: realized the particularly mining problem of nearly level board girdle of ultra-thin coal seam.Because ultra-thin coal seam work plane personnel pass in and out difficulty, adopt this method, the workman only needs to operate in the tunnel, need not enter work plane, and just energy extraction coal has solved the difficult problem that the ultra-thin coal seam resource reclaims.In addition, because exploitation method is simple, equipment is simple, and work plane is unmanned without supporting, so cost of winning is low, and personal security, social benefit and remarkable in economical benefits.

Further specify embodiment of the present invention again below in conjunction with accompanying drawing.

Fig. 1 is the coal-face schematic diagram, and Fig. 2 is wherein one section a main pseudosection of screw coal conveyer, and Fig. 3 is the lateral view of Fig. 2.

Marginal data: 1-return airway; 2-top winch; The 3-winch rope; The 4-temporary track; The 5-stemming; 6-explosive and detonating fuse; The 7-borehole; The 8-working face wall; 9-fortune colliery car; The 10-flange; The 11-haulage way; 12-bottom winch and winch rope; 13-lower flat wooden handcart; The 14-motor; The 15-reduction box; The 16-spillplate; 17-cuts eye; The 18-cylinder; 19-tail seat; 20-upper flat wooden handcart; The 21-helical blade; 22-cylinder hub; The 23-bolt; 24-bearing shell lid; 25-has the drum shaft of square skewer head; The 26-seat stay; The 27-base.

The coal-mining method of Fig. 1 is: 1. open up tailgate 1 and haulage way 11 in predetermined exploiting field for about 30 meters along the bearing interval, lay temporary track 4, arrange conveying track and mine car 9 in the haulage way 11, manually dig at pre-mining face and cut eye 17; 2. in tailgate 1 and haulage way 11, arrange respectively and install

puffer

2 and 12, on the track 4 of top and the bottom, install track

flat car

20 and 13 respectively, and winch cable 3 is fastened respectively on the track flat car; 3. above cutting eye 17, helix drum 18 1 is pushed away for 17 times along cutting eye successively, and be connected with reducer 15 by flange 10; The afterbody of the minor details of cylinder 18 is connected on the tail seat 19, and tail seat 19 is fixed on the flat car 20.In gallery 1 or 11 apart from about 8 one meters of ribs with powerful electric coal borer machine blast hole drilling 7, load explosive cartridge 6 at interval by detonating fuse, about 0.7 meter of spacing distance, borehole two, filling back is stopped up with stemming 5, stemming length is not less than 1.0 meters.On the appearing of detonating fuse, tie up blasting cap initiation then.5. after detonating, the motor 14 that turns on the power is delivered to quick-fried back coal breakage in the mine car 9 in the gallery 11, in course of conveying, constantly start

puffer

2 and 12 according to circumstances, screw coal conveyer is constantly advanced forward, finish up to whole coal breakages are carried, finish first working cycles.6. repeat the above-mentioned 4-5 course of work and enter the regular work circulation, until adopting complete design section.

The structure of one section cylinder is among Fig. 2 Fig. 3: 1. helical form is welded blade 21 on cylinder hub 22, a welding of cylinder hub 22 has the drum shaft 25 of square plug, square socket is taken the lead in the other end, when installing in the down-hole, earlier the square plug of a joint is inserted the square skewer mouth of another joint.2. weld spillplate 16 and left and right sides seat stay 26 on base 25, the length of base can be held 2 above cylinders of installation, depends on the circumstances; 3. the cylinder that links up is installed on the bracing frame, is about to drum shaft 25 and is stuck in the half slot of left and right sides seat stay 27; Bearing shell cover 24 is blocked drum shaft 25, tighten up with bolt 23 and get final product.

Claims

1. the ultra-thin coal seam manless working face exploitation method of nearly horizontal ultra-thin coal seam particularly, it comprises that the following step poly-:

(1) at first along the bearing face of assigning a work, top developing tailgate, below developing haulage way and get through and cut eye;

(2) installation work face coal handling system;

(I) each is auxilliaryly established temporary track and installs flat car at tailgate and haulage way, and arranges pulling equipment in work plane the place ahead;

(II) with the haulage way flat car install and fix the coal conveyor head, the return airway flat car installs and fixes coal conveyor tail seat;

(III) from cutting eye top one and connect gradually successively and pushing away along cutting now, is connected in first segment on the power output shaft of screw coal conveyer head the screw coal conveyer cylinder with flange; The last joint of cylinder is connected on the coal conveyor tailstock;

(3) deep hole blasting coal breakage:

(I) drilling deep hole borehole; In a side tunnel, arrange drilling cramp and rig, with spreading formula drilling rod be parallel to work plane in the coal seam drilling deep hole borehole until the saturating opposite side of brill tunnel;

(II) filling explosive: adopt detonating fuse series connection spaced loading structure, bundle at interval and be bundled in cord during filling on the drilling rod that does not withdraw to withdraw from and draw in borehole, or be bundled at interval and push borehole on the elongate rod with drilling rod; On the detonating fuse head that exposes, bundle detonator, ignite quick-fried loose work plane coal seam with exploder;

(4) work plane coal is carried:

(I) starts screw conveyer, work plane coal revolved at blade push on the haulage device that is delivered to haulage way;

(II) when starting coal conveyor, the pulling equipment that constantly starts in two lanes constantly advances until all quick-fried loose coals of being totally lost conveyer to work plane the place ahead, finish first circulation;

(5) repeat above-mentioned (three) described deep hole blasting coal breakage and (four) described work plane coal and carry two steps, the propelling that goes round and begins again, circulates is until adopting complete design coal mining section.