CN107060762A - A kind of method of the anti-wall caving of coal seam shallow foundation pits - Google Patents

A kind of method of the anti-wall caving of coal seam shallow foundation pits Download PDF

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Publication number
CN107060762A
CN107060762A CN201710485023.XA CN201710485023A CN107060762A CN 107060762 A CN107060762 A CN 107060762A CN 201710485023 A CN201710485023 A CN 201710485023A CN 107060762 A CN107060762 A CN 107060762A
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CN
China
Prior art keywords
coal seam
coal
hole
caving
shallow foundation
Prior art date
Application number
CN201710485023.XA
Other languages
Chinese (zh)
Inventor
葛春贵
许帮贵
钱四发
李建
张世泰
林卫国
Original Assignee
淮北矿业(集团)有限责任公司
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Application filed by 淮北矿业(集团)有限责任公司 filed Critical 淮北矿业(集团)有限责任公司
Priority to CN201710485023.XA priority Critical patent/CN107060762A/en
Publication of CN107060762A publication Critical patent/CN107060762A/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C41/00Methods of underground or surface mining; Layouts therefor
    • E21C41/16Methods of underground mining; Layouts therefor
    • E21C41/18Methods of underground mining; Layouts therefor for brown or hard coal

Abstract

The invention discloses a kind of method of the anti-wall caving of coal seam shallow foundation pits, comprise the following steps:1) along working face, forward cloth drills;2) single hole extends along seam inclination;3) hole packer is put into hole, hole packer connects flood pattern close to aperture one end;4) after pouring water into borehole, coal seam middle and upper part and the coal body formation metastable tack coat of intensity in front of directly top junction working face;The invention also discloses a kind of coal seam shallow foundation pits system, including coal bed drilling, hole packer is placed with the middle part of described coal bed drilling, hole packer is connected by pipeline with external water pump, pipeline is provided with pressure-reducing valve close to water pump one end, is provided with close to hole packer one end on non-return valve, pipeline and is additionally provided with water meter and pressure gauge, using technical scheme, " three is soft " coal-bed flooding difficulty of construction is reduced;Effectively preventing working face of coal seam wall caving, it is ensured that the safety in production of " three is soft " working face of coal seam.

Description

A kind of method of the anti-wall caving of coal seam shallow foundation pits

Technical field

The invention belongs to coal mining field, it is more particularly related to a kind of anti-of coal seam shallow foundation pits The method of side.

Background technology

In process of coal mining, because the change of underground mine structure, working face wall caving or roof fall phenomenon, wall caving can be caused Refer to mine operation face, tunnel side wall to deform under action of underground, the phenomenon destroyed and come off;Roof fall be top plate it is out of control and from The phenomenon of row inbreak, no matter which kind of above-mentioned phenomenon occurs, and can all cause the generation of big mining accident, all coal mining accidents of China In, the casualties caused by the roof accident that wall caving, roof fall induce accounts for the 43% of all accidents in underground, especially " three It is soft " during seam mining, wall caving, roof fall phenomenon are particularly acute;In actual coal mining, due to " three is soft " seam mining The particularity of matter condition, if carrying out moving frame and supporting not in time, easily causes working face wall wall caving, induces roof fall accident, give Working surface production brings huge potential safety hazard, influence face propulsion speed and yield, and huge economy is caused to coal mining Loss;The characteristics of prior art is directed to " three is soft " Coal Quality and top, bottom plate is relatively soft, using coal-bed flooding technology come effectively Prevent and treat coal wall caving, use deep hole static pressure water filling wet operation mode more this coal-bed flooding technology, in the presence of constructed to hole it is difficult The defects such as degree is big, drilling design is difficult, borehole engineering amount big, pipe laying length, flood effectiveness difference.

The content of the invention

The technical problems to be solved by the invention are to provide a kind of reduction " three is soft " coal-bed flooding difficulty of construction guarantee work The method of the anti-wall caving of coal seam shallow foundation pits of face safety in production.

To achieve these goals, the technical scheme taken of the present invention is:A kind of coal seam shallow foundation pits provided The method of anti-wall caving, comprises the following steps:

1) along working face, forward cloth drills, and aperture is located at working face middle and upper part, i.e. working face mining height at top 2/3, The spacing of adjacent drilling is 5~8m, and drill center line and horizontal angle are 15~20 °;

2) single hole extends along seam inclination, is drilled in hole using the long 1m thick stick twist drill rods that connect, drilling depth is 6~7m, is faced upward Angle is 15~20 °;

3) hole packer is put into hole, hole packer connects flood pattern close to aperture one end;

4) after pouring water into borehole, coal seam middle and upper part and coal body formation intensity in front of directly top junction working face are metastable Tack coat, water pump supplies water, 6MPa≤hydraulic pressure≤10MPa, and water injection time is 10~30 minutes.

A kind of method of anti-wall caving of coal seam shallow foundation pits disclosed by the invention, flood pattern includes one end and hole packer Connection, the pipeline that the other end is connected with water pump, pipeline is provided with pressure-reducing valve close to water pump one end, and check is provided with close to hole packer one end Water meter and pressure gauge are additionally provided with valve, pipeline.

The invention also discloses a kind of coal seam shallow foundation pits system, including coal bed drilling, in described coal bed drilling Portion is placed with hole packer, and hole packer is connected by pipeline with external water pump, and pipeline is provided with pressure-reducing valve close to water pump one end, close Hole packer one end is provided with non-return valve, pipeline and is additionally provided with water meter and pressure gauge.

A kind of coal seam shallow foundation pits system disclosed by the invention, drilling depth is 6~7m, and the elevation angle is 15~20 °.

A kind of coal seam shallow foundation pits system disclosed by the invention, water pump is dynamical pressure water infusion pump.

Using technical scheme, the wet operation mode of coal-bed flooding is relatively soft in ature of coal and top, bottom plate Working face, along working face, forward cloth drills, and drilling depth is 6~7m, and the elevation angle is 15~20 °, hole packer is put into hole, hole packer is leaned on Adjacent pores mouthful one end connection flood pattern, the water pump that flood pattern is used is dynamical pressure water infusion pump, is noted with the deep hole static pressure of prior art Water is compared, and not only reduces the quantities of drilling and pipe laying, while enhancing the caking property and shearing strength in coal seam, is reduced " three is soft " coal-bed flooding difficulty of construction;Effectively preventing working face of coal seam wall caving, it is ensured that the safety of " three is soft " working face of coal seam Production;" three is soft " coal seam is used after shallow foundation pits, the coal body easily in front of coal seam middle and upper part with directly top junction working face Form intensity metastable with certain thickness tack coat.

Below with reference to drawings and examples, the present invention is described in detail.

Brief description of the drawings

The content expressed by each width accompanying drawing of this specification and the mark in figure are briefly described below:

Fig. 1 is a kind of schematic diagram of the method for the anti-wall caving of coal seam shallow foundation pits of the invention;

The master that Fig. 2 drills for working face in a kind of method schematic diagram of anti-wall caving of coal seam shallow foundation pits shown in Fig. 1 View;

Fig. 3 is the side view of the working face drilling shown in Fig. 2;

Fig. 4 is a kind of design sketch of the method for anti-wall caving of coal seam shallow foundation pits shown in Fig. 1.

Marked in figure:1st, dynamical pressure water infusion pump;2nd, pressure-reducing valve;3rd, water meter;4th, pressure gauge;5th, non-return valve;6th, coal seam;7th, seal Hole device;8th, aperture;9th, top;10th, bottom plate;11 tack coats.

Embodiment

Below against accompanying drawing, by the description to embodiment, to the embodiment of the present invention such as involved each structure Mutual alignment and annexation, the effect of each several part and operation principle, manufacturing process between the shape of part, construction, each several part And operate with method etc., be described in further detail, with help those skilled in the art to the inventive concept of the present invention, Technical scheme has more complete, accurate and deep understanding.

Fig. 1 is a kind of schematic diagram of the method for the anti-wall caving of coal seam shallow foundation pits of the invention;Fig. 2 is one shown in Fig. 1 Plant the front view that working face drills in the method schematic diagram of the anti-wall caving of coal seam shallow foundation pits;Fig. 3 is the working face shown in Fig. 2 The side view of drilling, Fig. 4 is a kind of design sketch of the method for anti-wall caving of coal seam shallow foundation pits shown in Fig. 1;As schemed A kind of method of the anti-wall caving of coal seam shallow foundation pits of the invention shown, comprises the following steps:

1) along working face, forward cloth drills, and aperture 8 is located at working face middle and upper part, i.e. working face mining height away from the height of top 9 about At 2/3, the spacing of adjacent drilling is 5~8m, and drill center line and horizontal angle are 15~20 °;

2) single hole extends along seam inclination, is drilled in hole using the long 1m thick stick twist drill rods that connect, drilling depth is 6~7m, is faced upward Angle is 15~20 °;

3) hole packer 7 is put into hole, depth >=1m of drilling is inserted, hole packer 7 connects flood pattern close to aperture one end;

4) after pouring water into borehole, the middle and upper part of coal seam 6 and coal body formation intensity in front of directly top junction working face are relative stable Tack coat 11, water pump supply water, 6MPa≤hydraulic pressure≤10MPa, water injection time be 10~30 minutes.

Flood pattern is connected including one end with hole packer 7, the pipeline that the other end is connected with water pump, and pipeline is close to water pump one end Provided with pressure-reducing valve 2, it is provided with close to the one end of hole packer 7 on non-return valve 5, pipeline and is additionally provided with water meter 3 and pressure gauge 4;Water pump is dynamic pressure Water injecting pump 1.

Using technical scheme, the wet operation mode of the water filling of coal seam 6, ature of coal and top 9, bottom plate 10 compared with Soft working face, along working face, forward cloth drills, and drilling depth is 6~7m, and the elevation angle is 15~20 °, and hole packer 7 is put into hole, Hole packer 7 connects flood pattern close to aperture one end, and the water pump that flood pattern is used is dynamical pressure water infusion pump 1, with prior art Deep hole static pressure water filling is compared, and not only reduces the quantities of drilling and pipe laying, while enhancing the caking property in coal seam 6 and resisting Intensity is cut, " three is soft " coal-bed flooding difficulty of construction is reduced;The working face wall caving of effectively preventing coal seam 6, it is ensured that " three is soft " coal seam The safety in production of working face;" three is soft " coal seam is used after shallow foundation pits, easily in coal seam middle and upper part with directly pushing up junction work Square coal body formation intensity is metastable in face of work has certain thickness tack coat 11.

The present invention is exemplarily described above in conjunction with accompanying drawing, it is clear that the present invention is implemented not by aforesaid way Limitation, as long as the improvement of the various unsubstantialities of inventive concept and technical scheme of the present invention progress is employed, or without changing Enter and the design of the present invention and technical scheme are directly applied into other occasions, within protection scope of the present invention.

Claims (9)

1. a kind of method of the anti-wall caving of coal seam shallow foundation pits, it is characterised in that:Comprise the following steps:
1) along working face, forward cloth drills;
2) single hole extends along seam inclination;
3) hole packer is put into hole, hole packer connects flood pattern close to aperture one end;
4) after pouring water into borehole, coal seam middle and upper part and the coal body formation metastable bonding of intensity in front of directly top junction working face Layer.
2. according to a kind of method of anti-wall caving of coal seam shallow foundation pits described in claim 1, it is characterised in that:Described step Rapid 1) along working face, forward cloth drills, and aperture is located at working face middle and upper part, i.e. working face mining height at top 2/3, adjacent brill The spacing in hole is 5~8m, and drill center line and horizontal angle are 15~20 °.
3. according to a kind of method of anti-wall caving of coal seam shallow foundation pits described in claim 1, it is characterised in that:Described step Rapid 2) single hole extends along seam inclination, is drilled in hole using the long 1m thick stick twist drill rods that connect, drilling depth is 6~7m, and the elevation angle is 15 ~20 °.
4. according to a kind of method of anti-wall caving of coal seam shallow foundation pits described in claim 1, it is characterised in that:Described step Rapid 3) hole packer insertion drilling, inserts depth >=1m of drilling.
5. according to a kind of method of anti-wall caving of coal seam shallow foundation pits described in claim 1, it is characterised in that:Described note Water system is connected including one end with hole packer, the pipeline that the other end is connected with water pump, and pipeline is provided with pressure-reducing valve close to water pump one end, It is provided with close to hole packer one end on non-return valve, pipeline and is additionally provided with water meter and pressure gauge.
6. according to a kind of method of anti-wall caving of coal seam shallow foundation pits described in claim 1, it is characterised in that:Described step Rapid 4) water pump supplies water, 6MPa≤hydraulic pressure≤10MPa, and water injection time is 10~30 minutes.
7. a kind of coal seam shallow foundation pits system, including coal bed drilling, it is characterised in that:Placed in the middle part of described coal bed drilling There is hole packer, hole packer is connected by pipeline with external water pump, pipeline is provided with pressure-reducing valve close to water pump one end, close to hole packer One end is provided with non-return valve, pipeline and is additionally provided with water meter and pressure gauge.
8. according to a kind of coal seam shallow foundation pits system described in claim 7, it is characterised in that:Described drilling depth is 6~7m, the elevation angle is 15~20 °, depth >=1m of hole packer insertion drilling.
9. according to a kind of coal seam shallow foundation pits system described in claim 7, it is characterised in that:Described water pump is dynamic pressure Water injecting pump.
CN201710485023.XA 2017-06-23 2017-06-23 A kind of method of the anti-wall caving of coal seam shallow foundation pits CN107060762A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4226475A (en) * 1978-04-19 1980-10-07 Frosch Robert A Underground mineral extraction
CN104514579A (en) * 2014-12-23 2015-04-15 淮北矿业股份有限公司 High pressure shallow hole water injector for fully mechanized coal mining face
CN105863717A (en) * 2016-06-13 2016-08-17 淮南矿业(集团)有限责任公司 Method for preventing rib spalling by injecting water to soft coal seam mining face

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4226475A (en) * 1978-04-19 1980-10-07 Frosch Robert A Underground mineral extraction
CN104514579A (en) * 2014-12-23 2015-04-15 淮北矿业股份有限公司 High pressure shallow hole water injector for fully mechanized coal mining face
CN105863717A (en) * 2016-06-13 2016-08-17 淮南矿业(集团)有限责任公司 Method for preventing rib spalling by injecting water to soft coal seam mining face

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王云东: "《特厚极软煤层放顶煤工作面防片帮、漏顶技术的研究》", 《煤炭技术》 *

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Application publication date: 20170818