CN103485819A

CN103485819A - Method for inverted step bag type filling of large dip angle coal seam gob

Info

Publication number: CN103485819A
Application number: CN201310434474.2A
Authority: CN
Inventors: 贾凯军; 冯光明; 李乃梁; 滑怀田; 任海兵; 李�杰; 张兆威; 张德成; 王清亚; 王帅; 刘永清; 李少华
Original assignee: China University of Mining and Technology CUMT
Current assignee: China University of Mining and Technology CUMT
Priority date: 2013-09-23
Filing date: 2013-09-23
Publication date: 2014-01-01
Anticipated expiration: 2033-09-23
Also published as: CN103485819B

Abstract

A method for inverted step bag type filling of a large dip angle coal seam gob comprises the steps of starting to incline a working surface from an open-off cut, adopting pseudo-inclined mining, performing gob bag type filling method filling on the gob, enabling one more filling body to be sequentially filled in a next subsection than in a front subsection, and enabling the filling bodies to be in an inverted step mode; performing propulsion along the trend along with the pseudo-inclined working surface, and filling the gob sequentially until filling work of the whole gob is finished. The large dip angle working surface is arranged in a pseudo-inclined mode, the dip angle of the working surface is reduced, the lower filling bodies serve as carriers for the upper filling bodies in the gob, the filling bodies can not only support a top plate and effectively control movement of overlying strata, but also form a whole, and the stability is good. The method is particularly suitable for large dip angle working surface gob filling propelled according to the trend, a filling process is simple, construction is simple, investment at an initial stage is less, and filling efficiency and filling density are high.

Description

A kind of large-inclination-angle coal bed goaf rank pocket type placement method of falling from power

Technical field

The present invention relates to a kind of large-inclination-angle coal bed goaf rank pocket type placement method of falling from power, be particularly useful for large-inclination-angle coal bed work plane and move towards the goaf filling advanced.

Background technology

For a long time, on " three times " pressure coal and water body, after coal mining, often cause the gross distortion on goaf overlying rock and earth's surface, cause that above ground structure can't be used because of distortion, lithic drainage is also destroyed.By filling is carried out in goaf, can address these problems.

At present, the pocket type placement method that goaf filling adopts, by the direct roof supporting of obturation, can reduce and crush and control surface movement, but it is only applicable to the goaf filling of moving towards propelling or facing upward oblique exploitation work plane that seam inclination is less, when seam inclination is greater than 25 °, when work plane moves towards to advance, filling bag will be in the packing job process and filling complete after slurry produce downslide because of Action of Gravity Field before solidifying, not only reduce pack completeness but also affected the stability of obturation, thereby limited the propagation and employment of pocket type placement method.

Summary of the invention

Technical problem: the objective of the invention is to overcome the deficiency of existing goaf pocket type filling technique, a kind of goaf bag-type packing method that high inclination-angle moves towards work plane that adapts to is provided.

Technical scheme: the large-inclination-angle coal bed goaf of the present invention rank pocket type placement method of falling from power comprises the steps:

A, from the open-off cut lower end, start the oblique adjusting coal-face, from the bottom up, take the flexible filling bag length as unit along the seam inclination direction to coal-face segmentation exploited, at first, along open-off cut, the first segmentation bottom advances equate with the flexible filling bag width section dark, and hang flexible filling bag in the goaf at its rear, flexible filling bag is carried out to filling; Then, in the first segmentation, advance again one to cut deeply, in the second segmentation, advance one to cut deeply simultaneously, and complete hanging bag and filling work in the goaf at its rear; Carry out in proper order, in the first segmentation, the second segmentation, advance again one to cut dark, in the 3rd segmentation, advance one to cut dark simultaneously, and complete hanging bag and filling operation in the goaf at its rear, constantly push ahead, until the oblique adjusting bashing stage, last segmentation of open-off cut upper end advances one to cut dark, and complete hanging bag and filling operation in the goaf at its rear, make coal-face (2) and track lane form angle α;

B, complete the oblique adjusting operation after, along the pseudo-tiltedly exploitation of moving towards of coal-face, one of the every propelling of coal-face cuts dark, hangs successively from the bottom up flexible filling bag in each segmentation of the goaf at its rear, and carries out filling;

C, with coal-face, constantly advance, when terminal that the coal-face exploitation by transportation lane one side closes on, start the coal-face of oblique adjusting is aligned, complete successively from the bottom up the filling operation of each segmentation, until go up a segmentation goaf most while completing the filling operation of last obturation, whole stowing operation finishes.

Described obturation is the rank arranged in form of falling from power in goaf; The angle α in described coal-face and track lane is 75 °～85 °.

Beneficial effect: owing to having adopted technique scheme, work plane moves towards to advance pseudo-tiltedly exploitation, and angle reduces, and length increases, and the back production work efficiency improves; Obturation is arranged with stepped form, the top obturation using to have condensed in bottom and the obturation that possesses some strength as support, having avoided slurry to solidify the cause deadweight glides, strengthened the self-stability of obturation, and under the high inclination-angle condition, each obturation relies on extruding mutually, forms an integral body, and the top board that goaf is exposed is supported.The present invention can solve " three times " and press coal low, the complex process of filling mining mode pack completeness and the larger problem of investment in the past, is applicable to the goaf filling that large-inclination-angle coal bed work plane move towards propelling.The optional scope of filler is wide, and filling process is simple, the initial stage less investment, and easily construction, pack effectiveness and pack densification are high, have practicality widely.

The accompanying drawing explanation

Fig. 1 is filling floor map in oblique adjusting process of the present invention;

Fig. 2 is the present invention's filling floor map while completing oblique adjusting;

Filling floor map when Fig. 3 is the normal filling of the present invention;

Fig. 4 is the present invention's filling floor map while starting to align;

Fig. 5 is filling floor map in levelling process of the present invention;

Fig. 6 is filling floor map after sand off of the present invention.

In figure: the 1-open-off cut; The 2-coal-face; The 3-goaf; 4-track lane; 5-transports lane; The 6-obturation.

The specific embodiment

Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:

Shown in Fig. 1, take and arrange that along coal-face 2 five filling bag are example.After open-off cut 1 has tunneled, coal-face 2 is carried out to oblique adjusting, from the bottom up, the flexible filling bag length of take is divided into coal-face 2 as unit along the seam inclination direction five segmentations, at first, cutting that edge the first one of segmentation propelling bottom equates with the flexible filling bag width is dark, and hangs flexible filling bag in the goaf 3 at its rear, and flexible filling bag is carried out to filling; Then, in the first segmentation, advance again one to cut deeply, in the second segmentation, advance one to cut deeply simultaneously, and complete hanging bag and filling work in the goaf 3 at its rear; Carry out in proper order, in the first segmentation, the second segmentation, advance again one to cut dark, in the 3rd segmentation, advance one to cut dark simultaneously, and complete hanging bag and filling operation in the goaf 3 at its rear, constantly push ahead, until complete the oblique adjusting bashing stage, shown in Fig. 2, the 5th segmentation topmost advance first section dark, and the goaf 3 at its rear completes hanging bag and filling operation, makes coal-face 2 and track lane 4 form the angle α of 75 °～85 °.

Shown in Fig. 3, after completing the oblique adjusting operation, the pseudo-tiltedly exploitation of moving towards along coal-face 2, one of the every propelling of coal-face 2 cuts dark, hangs successively from the bottom up flexible filling bag in 3 each segmentations of the goaf at its rear, and carries out filling, until coal-face 2 first segmentations complete last section dark, arrival stops adopting line, and the goaf 3 at its rear completes corresponding hanging bag and filling operation, shown in Fig. 4.

Shown in Fig. 5, with coal-face 2, constantly advance, start the coal-face 2 of oblique adjusting is aligned, the second segmentation, the 3rd segmentation, the 4th segmentation and the 5th segmentation respectively advance one to cut dark, complete its packing job of hanging bag in its goaf, rear 3, now the second segmentation also reaches and stops adopting line, stop exploitation, carry out in proper order, the 3rd segmentation, the 4th segmentation reaches successively and stops adopting line, until the 5th segmentation topmost advance last section dark, reach and stop adopting line, and while in the goaf 3 at its rear, completing the filling operation of last obturation 6, whole stowing operation finishes, shown in Fig. 6.

According to the situation of goaf 3 overlying rocks, in case of necessity, in work plane track lane 4, transportation constructs fire dam in lane 5, obturation 6 and the service aisle that stops adopting between line are carried out to flood irrigation, until be full of.

Selected filler in above-mentioned example, possess certain mobility, is filled with filling bag and can solidifies after a period of time and form the induration with some strength, controls the activity of overlying rock.Such as high water filling material, paste filling material, paste-like backfill material etc.

Claims

1. the large-inclination-angle coal bed goaf rank pocket type placement method of falling from power, is characterized in that, comprises the steps:

A, from open-off cut (1) lower end, start oblique adjusting coal-face (2), from the bottom up, take the flexible filling bag length as unit along the seam inclination direction to coal-face (2) segmentation exploited, at first, along open-off cut (1), the first segmentation bottom advances equate with the flexible filling bag width section dark, and hang flexible filling bag in the goaf (3) at its rear, flexible filling bag is carried out to filling; Then, in the first segmentation, advance again one to cut deeply, in the second segmentation, advance one to cut deeply simultaneously, and complete hanging bag and filling work in the goaf (3) at its rear; Carry out in proper order, in the first segmentation, the second segmentation, advance again one to cut dark, in the 3rd segmentation, advance one to cut dark simultaneously, and complete hanging bag and filling operation in the goaf (3) at its rear, constantly push ahead, until the oblique adjusting bashing stage, last segmentation of open-off cut (1) upper end advances one to cut dark, and complete hanging bag and filling operation in the goaf (3) at its rear, make coal-face (2) and track lane (4) form angle α;

B, complete the oblique adjusting operation after, along the pseudo-tiltedly exploitation of moving towards of coal-face (2), one of the every propelling of coal-face (2) cuts dark, hangs successively from the bottom up flexible filling bag in each segmentation of goaf (3) at its rear, and carries out filling;

C, with coal-face (2), constantly advance, when terminal that coal-face (2) exploitation by transportation lane (5) one sides closes on, the coal-face (2) started oblique adjusting is aligned, complete successively from the bottom up the filling operation of each segmentation, until go up a segmentation goaf (3) most while completing the filling operation of last obturation (6), whole stowing operation finishes.

2. the large-inclination-angle coal bed goaf according to claim 1 rank pocket type placement method of falling from power, it is characterized in that: described obturation (6) is the rank arranged in form of falling from power in goaf (3).

3. the large-inclination-angle coal bed goaf according to claim 1 rank pocket type placement method of falling from power, it is characterized in that: described coal-face (2) is 75 °～85 ° with the angle α in track lane (4).