CN102425431B - Ultra-close coal layer mining roadway distributing method - Google Patents

Abstract

The invention discloses an ultra-close coal layer mining roadway distributing method, which comprises the following steps that: a contact eye which is communicated with a return airway of a lower coal layer is bored above an upper coal layer cutting eye to form a primary air return system; an air return roadway which is lagged to maintain is bored on an outline of an originally-designed upper coal layer return airway, a contact eye which is communicated with the return airway of the lower coal layer is bored every 20 to 60m on the lagged maintained roadway to form a complete production system. The return airway which is lagged to maintain is a roadway which is formed through the maintenance of an individual strut after coal is mined on the upper coal layer, and the working face return airway of the upper coal layer is unnecessary to drive, so the tunneling rate per 10,000 tons can be reduced, the labor intensity of workers can be reduced, the discharge of recrement can be reduced, and the pressure on a transportation system can be reduced.

Description

A kind of ultra-close coal layer mining roadway distributing method

Technical field

The present invention relates to seam mining roadway layout method.

Background technology

The point blank coal seam of indication of the present invention refers to two coal seams of Liang Ge up and down within the scope of 1-5m.

In coal production, each support in gateway of coal mining face of general every layer forms by transporting lane, return airway and cutting eye, and transportation lane is mainly used to transport coal, the spoil of extraction, air intake and pedestrian; Return airway is mainly used to return air, haul and pedestrian; Cut eye and be used for laying fully-mechanized mining equipment so that digging, both sides are connected with crossheading.If tunnel is all arranged in the coal seam up and down of point blank in the manner described above, some waste just seems.

Summary of the invention

The object of the invention is to utilize the extremely near feature of distance between coal seam, designed the coal cutting roadway method for arranging that a kind of upper and lower coal seam shares a return airway, thereby reach the object of saving stope drift active workings.

Ultra-close coal layer mining roadway distributing method of the present invention is:

In Xia coal seam, by traditional usual manner, arrange transportation lane, return airway and cut eye; In Shang coal seam, arrange transportation lane and cut eye; It is characterized in that ，Shang coal seam cuts the crosscut that the return airway in the top developing Yi Geyuxia coal seam of eye connects, form preliminary air return system; Exploitation along with upper coal seam, the individual prop that to beat 1-3 row, array pitch on intrinsic on the outline line of coal seam return airway be 600-1000mm, and add metal hinge top beam and support top board, thereby " ” return aircourse is safeguarded in hysteresis to form one, then along with the continuous propelling in upper coal seam, every 20-60m, in hysteresis, safeguard that the return airway of digging again a crosscut Yu Xia coal seam on tunnel connects, thereby form complete production system; Wherein:

The section width of crosscut is 1.8-3.0m; Crosscut top board adopts bolt support, and roofbolt row are apart from being 0.8-1.0m, and array pitch is 0.8-1.2m;

Hysteresis safeguards that goaf one side in tunnel, tunnel seals with double spoil bag wall, double spoil bag wall sealing for crosscut rear end outside, inner side are sealed with air duct fabric, air duct fabric upper end is clipped between metal hinge top beam and upper roof, lower end material compaction, prevent roof fall, leak out and toxic and harmful (as CO, CH ₄deng) overflow and enter tunnel, the spoil that also prevents inbreak is simultaneously scurried into tunnel and is washed upside down pillar and injure pedestrian by a crashing object.

The invention has the beneficial effects as follows:

1, the tunnel forming is safeguarded by individual prop after mining in the Shi Shang coal seam, return aircourse that hysteresis is safeguarded, without tunneling upper working face of coal seam return airway, has reduced by ten thousand tons of drivage ratios again, has reduced labor strength;

2, the return aircourse length that hysteresis is safeguarded is short, is easy to safeguard, tunnel lengthens along with the propelling of work plane, when arriving next crosscut, the advance of the face gets final product prop drawing caving, and tamp a crosscut, and enable new crosscut, saved a large amount of supporting expenses;

3, on each, coal seam coal-face has been dug a return airway less, has reduced the discharge of spoil, reduces the pressure of Liao Dui transportation system;

4, on each, coal seam coal-face tunnels a return airway less, has accelerated the layout in coal-face tunnel, thereby alleviated mine, produces the nervous situation that continues.

Accompanying drawing explanation

Fig. 1 is the production system schematic diagram in upper and lower coal seam;

Fig. 2 is upper working face of coal seam production system schematic diagram;

Fig. 3 lags behind to safeguard tunnel floor map;

Fig. 4 lags behind to safeguard tunnel sectional drawing;

Fig. 5 is crosscut sectional drawing;

Fig. 6 is crosscut supporting sectional drawing.

In figure, the upper roof of 1-; 2-Shang coal seam; The upper seat earth of 3-; 4-Xia coal seam; Seat earth under 5-; 6-crosscut; 7-Xia coal seam return airway; Transportation lane, 8-Xia coal seam; 9-goaf; 10-individual prop; The upper working face of coal seam of 11-; The return aircourse that 12-lags behind and safeguards; Transportation lane, 13-Shang coal seam; 14-metal hinge top beam; The double spoil bag of 15-wall; 16-cloth; 17-anchor metal.

The specific embodiment:

Yi Mou ore deposit is that example further illustrates ultra-close coal layer mining roadway distributing method below.

There is the two-layer coal seam of point blank in ，Mou ore deposit as shown in Figure 1, and coal bed texture is comprised of upper roof 1 ,Shang coal seam 2, upper seat earth (also descending roof) 3 ,Xia coal seams 4, lower seat earth 5.In figure, shown exploitation tunnel arrangement form, in Ta Shixia coal seam 4, by traditional usual manner cloth, deposited transportation lane, coal seam 8 ,Xia coal seam return airways 7 and cut eye (not mark); In Shang coal seam 2, cloth is set up transportation lane, coal seam 13 and cuts eye; Shang coal seam 2 is cut the return airway position of eye and is opened up the crosscut 6 of the return airway perforation in Yi Geyuxia coal seam 4, forms preliminary air return system.Exploitation along with upper coal seam 2, in the design lines of intrinsic return airway, beat the individual prop 10 that 1-3 arranges, array pitch is 600-1000mm, and add metal hinge top beam 14 and support roof 1, thereby form a return aircourse 12 that lags behind and safeguard, then along with the continuous propelling of upper working face of coal seam 11, formation goaf, rear 9; Every propelling 20-60m digs a crosscut 6 Yu Xia coal seam return airways 7 again and connects, thereby forms complete production ventilation system; Work plane return air circuit is: return aircourse 12 → crosscut 6 return airway 7 → windstone gate → ventilating shaft → ground, →Xia coal seam that transportation lane, ground → auxiliary shaft → haulage cross-cut →Shang coal seam 13 → work plane 11 → hysteresis is safeguarded.

As shown in Figure 5, Figure 6, the section width of crosscut 6 is 1.8-3.0m; Crosscut 6 top boards adopt anchor pole 17 supportings, and the anchor pole row of top board are apart from being 0.8-1.0m, and array pitch is 0.8-1.2m.

As shown in Figure 3, Figure 4, double spoil bag wall 15 sealings for 9 one sides of 12 goaf, return aircourse that lag behind and safeguard, crosscut 6 rear end outsides are also with double spoil bag wall 15 sealings, cloth 16 sealings for inner side, cloth 16 upper ends are clipped between metal hinge top beam 14 and upper roof 1, lower end material compaction, prevent roof fall, leak out and toxic and harmful (as CO, CH ₄deng) overflow and enter tunnel, the spoil that also prevents inbreak is simultaneously scurried into tunnel and is washed upside down pillar and injure pedestrian by a crashing object.

Claims (1)

1. a ultra-close coal layer mining roadway distributing method, arranges transportation lane, return airway and cuts eye in Ta Shixia coal seam; In Shang coal seam, arrange transportation lane and cut eye; It is characterized in that ，Shang coal seam cuts the crosscut that the return airway in the top developing Yi Geyuxia coal seam of eye connects, form preliminary air return system; Exploitation along with upper coal seam, the individual prop that to beat 1-3 row, array pitch on intrinsic on the outline line of coal seam return airway be 600-1000mm, and add metal hinge top beam and support top board, thereby form a return aircourse that lags behind and safeguard, then along with the continuous propelling in upper coal seam, the return airway of digging again a crosscut Yu Xia coal seam on 20-60m is lagging behind the return aircourse of safeguarding connects, thereby forms complete production system; Wherein

The section width of crosscut is 1.8-3.0m; Crosscut top board adopts bolt support, and roofbolt row are apart from being 0.8-1.0m, and array pitch is 0.8-1.2m;

Goaf one side of the return aircourse that hysteresis is safeguarded is sealed with double spoil bag wall, double spoil bag wall sealing for crosscut rear end outside, inner side are sealed with air duct fabric, air duct fabric upper end is clipped between metal hinge top beam and upper roof, lower end material compaction.

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