CN201301723Y

CN201301723Y - Fully-mechanized mining working plane ventilating structure

Info

Publication number: CN201301723Y
Application number: CN 200820227689
Authority: CN
Inventors: 张文昌; 杨晓红; 白鹏
Original assignee: Shanxi Coking Coal Group Co Ltd
Current assignee: Shanxi Coking Coal Group Co Ltd
Priority date: 2008-11-26
Filing date: 2008-11-26
Publication date: 2009-09-02
Anticipated expiration: 2018-11-26

Abstract

The utility model relates to the colliery methane governance field, in particular to a fully-mechanized mining working plane ventilating structure, which solves the problems that the prior fully-mechanized mining working plane ventilating system causes the methane concentration of a main return airway or a tail way to locate in the critical value to affect the normal production due to higher methane and oxygen concentration from a return air upper corner to a methane-discharge transverse section. The fully-mechanized mining working plane ventilating structure comprises a railway groove master air intake tunnel, a belt groove auxiliary air intake tunnel, a return air groove, a methane-discharge transverse and a return air transverse, and is characterized in that an isolated wall is arranged at the position which is arranged on one side of a gob along the return air upper corner of a gateway to a methane-discharge transverse port, the isolated wall changes the flow circuit line in the gob, reduces the methane discharge of the gob, solves the hidden danger of high concentration of methane from the working plane return air upper corner to the methane-discharge transverse section, reduces the total discharge amount of methane of the methane-discharge transverse section, lowers the methane concentration of the tail way and a general return air way, and enhances the suction effect of methane.

Description

The fully-mechanized mining working ventilating structure

Technical field

The utility model relates to the control of coalmine gas field, is specially a kind of fully-mechanized mining working ventilating structure.

Background technology

Fully-mechanized mining working is place most important under the coal mine, most critical, but the ambient conditions difference of Coal Production, owing to be gas, coal dust and spontaneous combustion disaster, make longwall top coal caving be subjected to great restriction, can the inflammable high seam of high gas realize exploitation, and key is decided by the degree of reliability of various Its Preventive Measures.In the inflammable thick coal-layer mining of high gas, the ventilating structure of work plane has a variety of, " two advance one time " ventilation system for example, i.e. track crossheading master air intake, the auxiliary air intake of belt crossheading, tail lane return air; Install booster at the belt crossheading air feed is just before carried out in the tail lane, dilution tail lane (return air traverses with the lining) gas is in the safe concentration scope of " safety regulations in coal mine " defined.

Shown in Fig. 3,5, there is following defective in this kind ventilating structure, the one, fully-mechanized mining working return air upper corner to the gas-removing section of traversing exist gas, oxygen concentration reach in the explosion limit scope may, in case may produce spark during the fracture of anchor pole, anchor cable, have great potential safety hazard; The 2nd, along with the propelling of fully-mechanized mining working; the return air upper corner is more and more longer to the distance of the gas-removing section of traversing; gob side entry retaining is subjected to the influence of roof pressure; the return air upper corner is more and more littler to the gas-removing section of traversing available ventilation section, and flowing resistance increases gradually, and air quantity sharply reduces; expansion along with the goaf scope; goaf gas can traverse from gas-removing and pour out, and causes panel main return airway gas density to be in critical condition through regular meeting, is directly restricting the fully-mechanized mining working ordinary production.

Summary of the invention

The utility model for solve existing fully-mechanized mining working ventilation system exist the return air upper corner to the gas-removing section of traversing gas, oxygen concentration is higher and cause main return airway and tail lane gas density to be in threshold, influence the problem of ordinary production, and a kind of fully-mechanized mining working ventilating structure is provided.

The utility model is to adopt following technical scheme to realize: the fully-mechanized mining working ventilating structure, comprise auxiliary intake of track crossheading master intake, belt crossheading and the air return way (being the tail lane) arranged along the coal seam, comprise also that gas-removing between auxiliary intake of belt crossheading and air return way traverses, return air traverses, innovative point of the present utility model is that return air upper corner to the gas-removing of the one side gob side entry retaining in the goaf traverses mouth and is provided with divider wall.

The spacing of described divider wall and coal group is 800mm.

The terminal spacing with fully-mechanized mining working surface hydraulic support of described divider wall is always 2m, this distance determine what this application people summarized the experience out through long-term practice.If this distance is too little, gas can be forced into work plane, and influence is exploitation normally, and has very big potential safety hazard; Otherwise then can't change the distinguished and admirable route in goaf, can't solve the high dense gas hidden danger of return air upper corner.

Compared with prior art, the utility model adopts divider wall that the goaf is separated, and can change the distinguished and admirable route in goaf, reduces goaf gas and gushes out; Can effectively solve the problem that panel main return airway gas density often is in threshold, liberate panel and fully-mechanized mining working production capacity greatly, the mine ventilation ability has obtained overall lifting; Substantially solve work plane return air upper corner to gas-removing and traversed Duan Gaonong gas hidden danger; Reduce gas that gas-removing the traverses total amount of gushing out, reduced tail lane and main return airway gas density, solved the hidden danger that tail lane and main return airway gas density often are in threshold; Eliminated of the influence of main ventilation fan full blast pressure simultaneously, can be widely used in the ventilation system of various structures, be particularly useful for two and advance one time goaf and the next layer gas extraction " ventilation system.

Description of drawings

Fig. 1 is a structural representation of the present utility model

Fig. 2 is the enlarged drawing of divider wall among Fig. 1

Fig. 3 does not set the gas route schematic diagram of divider wall for fully-mechanized mining working

Fig. 4 sets gas route schematic diagram behind the divider wall for fully-mechanized mining working

Fig. 5 does not set the gas suction by drilling route schematic diagram of divider wall for fully-mechanized mining working

Fig. 6 sets gas suction by drilling route schematic diagram behind the divider wall for fully-mechanized mining working

Among the figure: the auxiliary intake 3-air return way 4-gas-removing of 1-track crossheading master intake 2-belt crossheading traverses 5-return air and traverses 6-goaf 7-divider wall 8-hydraulic support

The specific embodiment

The fully-mechanized mining working ventilating structure, as Fig. 1, shown in 2, comprise the track crossheading master intake of arranging along the coal seam 1, auxiliary intake 2 of belt crossheading and air return way 3, the gas-removing that also comprises between auxiliary intake 2 of belt crossheading and air return way 3 traverses 4, return air traverses 5, return air upper corner to the gas-removing of 6 one side gob side entry retainings traverses mouth and is provided with divider wall 7 in the goaf, divider wall 7 is 800mm with the spacing of coal group, divider wall 7 terminal spacings with fully-mechanized mining working surface hydraulic support 8 are always 2m, as shown in the figure, when divider wall sets, can set the point off density post at gob side entry retaining earlier, the pillar top adds plate-girder, follows closely plank at the full section of gob side entry retaining point post then, and plank must overlap by fish scale, guarantee tightly, spray enclosed material at last; Divider wall also can adopt the method for gob side entry retaining masonry panel to realize.

As shown in Figure 4, the setting of divider wall can significantly reduce the gas density that fully-mechanized mining working return air upper corner traverses the place to gas-removing, as shown in Figure 6, divider wall separates the goaf, change the distinguished and admirable route in goaf, reduced goaf gas and gushed out, improved the effect of gas drainage under suction.

Claims

1, a kind of fully-mechanized mining working ventilating structure, comprise auxiliary intake (2) of track crossheading master intake (1), belt crossheading and the air return way (3) arranged along the coal seam, comprise also that the gas-removing that is positioned between auxiliary intake (2) of belt crossheading and the air return way (3) traverses (4), return air traverses (5), return air upper corner to the gas-removing that it is characterized in that (6) the one side gob side entry retainings in the goaf traverses and mouthful is provided with divider wall (7).

2, fully-mechanized mining working ventilating structure according to claim 1 is characterized in that the divider wall (7) and the spacing of coal group are 800mm.

3, fully-mechanized mining working ventilating structure according to claim 1 and 2 is characterized in that the terminal spacing with fully-mechanized mining working surface hydraulic support (8) of divider wall (7) is always 2m.