CN103557000A - Method for preventing gob-side entry rock burst through side-drawing filling - Google Patents

Abstract

The invention discloses a method for preventing gob-side entry rock burst through side-drawing filling. The method comprises the following steps: additionally arranging a bracket for supporting behind a stope face bracket; constructing, exploding and drilling holes in entry sides behind the support bracket at certain intervals, wherein shallow holes are pre-cracking holes for loosening coal, and deep holes are throwing holes for throwing loosened coal into the entry; filling a part of the entry to form a pressure relief protection zone, and forming a wedged clamping anti-burst structure through top plates and bottom plates; tunneling in a previous mining surface filling entry following the mining surface gob-side entry, supporting by using a shed, carrying out guniting on the surface of the entry behind a tunneling head, and reinforcing and preventing and extinguishing fire in partial areas by taking backfill grouting measures. A novel anti-burst technical system for performing explosion, filling, in-situ tunneling and supporting behind the mining surface is established.

Description

The method of side filling control gob side entry bump is taken out in utilization

Technical field

The invention belongs to Coal Mining Technology field, the method that side filling prevents and treats gob side entry bump is taken out in the utilization that relates in particular to a kind of colliery control gob side entry bump.

Background technology

The control problem of coal mine rock burst is still an international difficult problem, and especially deep-well is usually followed damaging impact along empty working face mining and pressed, and causes serious personnel casualty accidents.Roadway along Gob in Deep Mine major part takes to stay fender to protect lane method at present, and mining Practice shows that the method exists the shortcomings such as resource recovery is low, deformation of the surrounding rock in tunnel amount is large, advance support is difficult, Controlling of Coal Outburst workload is large.As CN1664310A discloses a kind of control method for coal mine detached island coal pillar rock burst; first it arrange coal cutting roadway in the low stress area of isolated island coal column; and stay 3.0 ~ 4.0 meters to protect coal columns; at the empty crossheading in upper and lower edge, every 3.0 ~ 4.0 meters, bore unloading pressure by blasting hole; hole depth is coal seam thickness or span length 3 times; then to upper and lower gate road, help body superficial part to reinforce, finally to Bang Ti deep, tunnel physical modification.The mode complex process adopting, engineering quantity is huge, and release effect can not get ensureing.Therefore the control problem of Roadway along Gob in Deep Mine bump also not basic solution is at present larger along the degree of danger in empty working face mining process.

Summary of the invention

In order to address the above problem, the object of the invention is to stay fender to protect the great deficiency that lane exists many Controlling of Coal Outburst problems for most of employing of current gob side entry, utilize change top board structure and tunnel position to propose a kind of method that side filling control gob side entry bump is taken out in utilization.

Technical scheme of the present invention is: utilize the method for taking out side filling control gob side entry bump, specifically comprise the following steps:

The back supporting of step 1. work plane rear:

First when upper working face extraction, at back production support rear, increase a support of the same type and carry out supporting, guarantee that the top board within the scope of the tunnel 10 ~ 15m of support rear is complete, and the needs that can meet ventilation, blow out;

Step 2. is arranged and is taken out side filling shot hole explosion:

According to face advanced distance, on portion of the side sidewall in tunnel, described support frame rear, apart from base plate 1.0 ~ 1.3m place, play pre-splitting hole and throwing boring, described pre-splitting hole and the throwing spacing of wells are 1m, the degree of depth of described pre-splitting hole is 6 ~ 7m, portion of the side sidewall in angle and tunnel is 40 ~ 45 °, borehole bottom location is 4 ~ 5m apart from the rib degree of depth, and sealed borehole length is 2.5 ~ 3m; Described throwing drilling depth is 11 ~ 12m, portion of the side sidewall in angle and tunnel is 65 ~ 70 °, borehole bottom location is 8 ~ 10m apart from the rib degree of depth, sealed borehole length is 4 ~ 5m, outside hole, line adopts short-delay blasting, explosion is extracted loosening portion of side coal body out throwing in tunnel, pack portion tunnel, form unloading pressure protection band on a large scale, along with the advance of the face, the top board sinking of rupturing gradually, base plate is heaved gradually under geostatic stress effect, roof and floor can form wedge shape clamping anti-washing structure, and in structure, coal body is substantially without going out possibility;

Step 3. gob side entry is arranged:

Continue work plane gob side entry at upper work plane stowboard position driving, and roof and floor is solid rock, adopts shed shoring, whitewashes to surface, tunnel in heading end rear, and subregion can take grouting behind shaft or drift lining measure to reinforce and anti-fire extinguishing.

The invention has the beneficial effects as follows: will continue work plane gob side entry and former stowboard location overlap of the method arranged, can weaken or eliminate gob side entry shock hazard.Tunnel filling is constructed in goaf, work plane rear, does not affect working face extraction, reduces Coal Pillar Design, greatly reduce gob side entry deflection and advance support and bottle up, and roof and floor can form wedge shape clamping anti-washing structure, has substantially eliminated bump dangerous.

Accompanying drawing explanation

Fig. 1 is embodiments of the present invention schematic diagrames.

Fig. 2 is the layout schematic diagram of boring of the present invention.

Fig. 3 is the wedge shape clamping anti-washing structure schematic diagram that the present invention forms.

In figure:

1, coal seam; 2, tunnel; 3, support; 4, support frame; 5, throwing boring; 6, shallow pre-splitting hole; 7, explosion produces fracture area; 8, throwing is to coal body in tunnel; 9, old rimrock layer; 10, immediate roof rock stratum; 11, floor strata; 12, the work plane that continues; 13. goafs.

 

The specific embodiment

Below in conjunction with specific embodiment, specific embodiments of the invention are described further technical scheme of the present invention.

As Figure 1-3, the method for side filling control gob side entry bump is taken out in utilization of the present invention, specifically comprises the following steps:

1. in deep-well coal wall, tunnel 2 width are 4.5m, first at working face of coal seam 1 back production support 3 rears, increase a support of the same type and carry out supporting, as support frame 4, guarantee that the top board 10 within the scope of the tunnel 210 ~ 15m of support rear is complete, and can meet ventilation, the needs such as blow out.

2, if work plane average advance distance every day is 5m, increasing by two blasting boreholes of portion of side construction in support 4 tunnels, rear 2, aperture is 42mm, aperture is arranged in apart from base plate 1.2m place, pre-splitting hole 6 is pre-ceasma, the quick-fried pine of coal body, drilling depth is 7m, portion of the side sidewall in angle and tunnel is 45 °, borehole bottom location is 5m apart from the rib degree of depth, sealed borehole length is 3m, deep hole 5 is throwing hole, to become flexible portion of side coal body 8 and extract throwing out in tunnel 2, pack portion tunnel, drilling depth is 11m, portion of the side sidewall in angle and tunnel is 65 °, borehole bottom location is 10m apart from the rib degree of depth, sealed borehole length is 4m.

3, the interior coal body soft broken in blast area 7, can form unloading pressure protection band on a large scale, along with the advance of the face, top board 9 sinking of rupturing gradually, base plate 11 is heaved gradually under geostatic stress effect, and top board 9, base plate 11 can form wedge shape clamping anti-washing structure, and in structure, coal body is substantially without going out possibility;

4, after work plane 1 exploitation finishes, tunnel 2 also filling is complete; Continue work plane 12 gob side entries at upper work plane stowboard 2 position drivings, top board 9, base plate 11 are solid rock, adopting shed shoring, whitewashes to surface, tunnel in heading end rear, and subregion can take grouting behind shaft or drift lining measure to reinforce and anti-fire extinguishing.

Claims (1)

1. utilize the method for taking out side filling control gob side entry bump, specifically comprise the following steps:

The back supporting of step 1. work plane rear:

First when upper working face extraction, at back production support rear, increase a support of the same type and carry out supporting, guarantee that the top board within the scope of the tunnel 10 ~ 15m of support frame rear is complete, and the needs that can meet ventilation, blow out;

Step 2. is arranged and is taken out side filling shot hole explosion:

According to face advanced distance, on portion of the side sidewall in tunnel, described support frame rear, apart from base plate 1.0 ~ 1.3m place, play pre-splitting hole and throwing boring, described pre-splitting hole and the throwing spacing of wells are 1m, the degree of depth of described pre-splitting hole is 6 ~ 7m, portion of the side sidewall in angle and tunnel is 40 ~ 45 °, borehole bottom location is 4 ~ 5m apart from the rib degree of depth, and sealed borehole length is 2.5 ~ 3m; Described throwing drilling depth is 11 ~ 12m, portion of the side sidewall in angle and tunnel is 65 ~ 70 °, borehole bottom location is 8 ~ 10m apart from the rib degree of depth, sealed borehole length is 4 ~ 5m, outside hole, line adopts short-delay blasting, explosion is extracted loosening portion of side coal body out throwing in tunnel, pack portion tunnel, form unloading pressure protection band on a large scale, along with the advance of the face, the top board sinking of rupturing gradually, base plate is heaved gradually under geostatic stress effect, roof and floor can form wedge shape clamping anti-washing structure, and in structure, coal body is substantially without going out possibility;

Step 3. gob side entry is arranged:

Continue work plane gob side entry at upper work plane stowboard position driving, and roof and floor is solid rock, adopts shed shoring, whitewashes to surface, tunnel in heading end rear, and subregion can take grouting behind shaft or drift lining measure to reinforce and anti-fire extinguishing.

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