CN104265364A - Monitoring determining method for working face goaf lateral coal plastic area width - Google Patents

Monitoring determining method for working face goaf lateral coal plastic area width Download PDF

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Publication number
CN104265364A
CN104265364A CN201410370533.9A CN201410370533A CN104265364A CN 104265364 A CN104265364 A CN 104265364A CN 201410370533 A CN201410370533 A CN 201410370533A CN 104265364 A CN104265364 A CN 104265364A
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China
Prior art keywords
work plane
monitoring
coal body
plastic zone
body width
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CN201410370533.9A
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CN104265364B (en
Inventor
王书文
毛德兵
蓝航
潘俊锋
夏永学
秦子晗
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Tiandi Science and Technology Co Ltd
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Tiandi Science and Technology Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F17/00Methods or devices for use in mines or tunnels, not covered elsewhere
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00Survey of boreholes or wells
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F17/00Methods or devices for use in mines or tunnels, not covered elsewhere
    • E21F17/18Special adaptations of signalling or alarm devices

Abstract

A monitoring determining method for the working face goaf lateral coal plastic area width comprises the steps that (a) within the range of advancing a working face by 50 m to 100 m, a plurality of horizontal holes with different depths are drilled in a non-mining wall of a mining roadway; (b) a borehole stressmeter is arranged in each horizontal hole; (c) the borehole stressmeters are all connected to a signal connection station, the signal collection station is arranged in the mining roadway, and the working face is advanced by 200 m to 300 m; (d) the borehole stressmeters and the signal connection station are powered on, and vertical stress of monitoring points is begun to be continued to be monitored; (e) when the working face to be mined is pushed and mined to the position 10 m to 20 m away from the signal collection station, a stress change curve is generated; (f) the type of the stress change curve of the monitoring points is determined, and the working face goaf lateral coal plastic area width is determined. The monitoring determining method is convenient to operate, safe, reliable and high in accuracy.

Description

Work plane goaf side is to coal body Width of Plastic Zone monitoring defining method
Technical field
The present invention relates to work plane goaf side to coal body Width of Plastic Zone monitoring defining method.
Background technology
Actual mining face goaf side is one of important evidence of carrying out section coal pillar design to coal body Width of Plastic Zone.With regard to coal body plastic zone or rupture zone are measured, existing many measuring methods at present, wherein, apply the more boring that has and spy on method, drilling cuttings method, water filling osmosis, seismic wave method, acoustic-emission etc., but practice shows, the rupture zone width measure effect of these class methods to macroscopical cranny development is better, inadequate to Width of Plastic Zone certainty of measurement.And these methods are not easy to measure to coal body for goaf side.Therefore, at present, for side direction coal body Width of Plastic Zone, especially goaf side carries out measurement to coal body Width of Plastic Zone and determines to be still a difficult problem.
Borehole stressmeter is the lane side vertical stress monitoring equipment that underground coal mine is conventional, and this equipment volume is little, and structure is simple, is convenient to install, and can be arranged on goaf rear side in coal body, be convenient to the monitoring of goaf side to coal body plastic zone.But in fact, borehole stressmeter monitoring result is only the corresponding force value of coal body, the meaning of monitoring result essence is reflection monitoring point stress in coal bed variation tendency.Therefore, the monitoring result between different borehole stressmeter does not have relative value, just cannot accurately judge peak stress actual position yet, and the borehole stressmeter monitoring method adopted at present determines to there is the not high problem of the degree of accuracy equally for the monitoring of coal body plastic zone.
At present, also do not have in prior art a kind of easy and simple to handle, implement the high work plane goaf side of safety, the degree of accuracy to coal body Width of Plastic Zone monitoring defining method.
Summary of the invention
Adopt the moulding width of borehole stressmeter monitoring coal body to there is the not high reason of the degree of accuracy, the mainly precision problem of borehole stressmeter own, between different borehole stressmeter, the size of monitoring result can accurately not reflect monitoring point stress intensity relation.But for same borehole stressmeter, its pressure trend can reflect the variation tendency of this monitoring point stress in coal bed comparatively accurately.Based on this, the invention provides a kind of easy and simple to handle, safe and reliable, monitoring determination result accurately work plane goaf side to coal body Width of Plastic Zone monitoring defining method.
The technical solution used in the present invention is as follows:
Work plane goaf side, to coal body Width of Plastic Zone monitoring defining method, comprises the steps:
(a) within the scope of mining in advance work plane 50 ~ 100m, in the non-back production side of stope drift active workings, drill through different depth lateral aperture several;
A borehole stressmeter is arranged in (b) lateral aperture described in each;
C described borehole stressmeter is all connected to signals collecting station by (), described signals collecting station is arranged in described stope drift active workings, advanced described stope 200 ~ 300m;
D () is powered to described borehole stressmeter and described signals collecting station, make it start to monitor continuously each monitoring point vertical stress;
E () pushes to adopt to during apart from described signals collecting station 10 ~ 20m until described stope, the stress data utilizing described signals collecting station to gather generates stress changing curve;
F () determines the stress changing curve type of each monitoring point before and after work plane pushes to adopt, accordingly, determine side direction coal body Width of Plastic Zone in work plane goaf.
At above-mentioned work plane goaf side in coal body Width of Plastic Zone monitoring defining method, the stress changing curve type of the described each monitoring point of step (f) is divided into two kinds, one is " rising-decline-stable " type curve, there is plastic failure in reflection coal body, one is " rise-stablize " type curve, reflection coal body is still in elastic stage, and plastic failure does not occur.According to this kind of classification, when the stress changing curve type of adjacent two monitoring points occurs different, confirm that goaf side is between these two monitoring points to boundary line, coal body plastic zone, determine that in work plane goaf, side direction coal body Width of Plastic Zone is the vertical distance of these two monitoring point line mid points and described stope drift active workings.
At above-mentioned work plane goaf side in coal body Width of Plastic Zone monitoring defining method, the described lateral aperture of step (a) is all perpendicular to lane side, and the strike separation of adjacent two described lateral apertures is 1m, and depth difference is 1m.
At above-mentioned work plane goaf side in coal body Width of Plastic Zone monitoring defining method, the described lateral aperture quantity of step (a) is 10, and minimum-depth is 5m.
At above-mentioned work plane goaf side in coal body Width of Plastic Zone monitoring defining method, described borehole stressmeter and described signals collecting station connection line are helped to arrange near described non-back production, and use casing protection.
Technique scheme of the present invention has the following advantages compared to existing technology:
1. work plane goaf side provided by the invention is to coal body Width of Plastic Zone monitoring defining method, due to only need at the complete front disposable installation borehole stressmeter of working face extraction, observation process is without the need to manual intervention, goaf is entered without the need to workman, therefore, the present invention is easy and simple to handle, and construction cost is low, safe and reliable.
2. work plane goaf side provided by the invention is to coal body Width of Plastic Zone monitoring defining method, owing to only analyzing the variation of stress of same borehole stressmeter, do not need to compare analysis to different borehole stressmeter monitoring numerical values recited, therefore, the present invention has got around the difficult problem that borehole stressmeter itself cannot realize accurate quantitative analysis monitoring, and the degree of accuracy of monitoring determination result obtains and effectively improves.
Accompanying drawing explanation
In order to make content of the present invention be more likely to be clearly understood, below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is that work plane goaf side of the present invention is implemented to arrange schematic diagram to coal body Width of Plastic Zone monitoring defining method;
Fig. 2 is that work plane goaf side of the present invention monitors monitoring point " rising-decline-stable " the type stress changing curve of defining method acquisition and " rising-stablize " type stress changing curve to coal body Width of Plastic Zone.
In figure, Reference numeral is expressed as: 1-stope, 2-stope drift active workings, the non-back production side of 3-, 4-lateral aperture, 5-borehole stressmeter, 6-signals collecting station, 7-work plane goaf, 8-" rise-decline-stable " type stress changing curve, 9-" rise-stable " type stress changing curve.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Described work plane goaf side, to coal body Width of Plastic Zone monitoring defining method, comprises the steps:
(a) within the scope of 50 ~ 100m of mining in advance work plane 1, in the non-back production side 3 of stope drift active workings 2, drill through different depth lateral aperture 4 several;
A borehole stressmeter 5 is arranged in (b) lateral aperture 4 described in each;
C described borehole stressmeter 5 is all connected to signals collecting station 6 by (), described signals collecting station 6 is arranged in described stope drift active workings 2, and the distance of advanced described stope 1 is 200 ~ 300m;
D () is powered to described borehole stressmeter 5 and described signals collecting station 6, start to monitor continuously each monitoring point vertical stress;
E (), when to push to adopt to the distance with described signals collecting station 6 be 10 ~ 20m to described stope 1, the stress data utilizing described signals collecting station 6 to gather generates stress changing curve;
F () determines the stress changing curve type of each monitoring point before and after work plane pushes to adopt, accordingly, determine side direction coal body Width of Plastic Zone in work plane goaf 7.
In the present embodiment, the stress changing curve type of the described each monitoring point of step (f) is divided into two kinds, and one is " rising-decline-stable " type curve 8, and one is " rise-stablize " type curve 9.
In the present embodiment, the described lateral aperture 4 of step (a) is all perpendicular to lane side, and the strike separation of adjacent two described lateral apertures 4 is 1m, and depth difference is 1m.
In the present embodiment, step (a) described lateral aperture 4 quantity is 10, and minimum-depth is 5m.
In the present embodiment, described borehole stressmeter 5 helps 3 to arrange with described signals collecting station 6 connection line near described non-back production, and uses casing protection.
In other embodiments, the described lateral aperture 4 of step (a) is all perpendicular to lane side, and the strike separation of adjacent two described lateral apertures 4 is 1m, and depth difference is 0.5m.
Execute in example at other, step (a) described lateral aperture 4 quantity is 20, and minimum-depth is 5m.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain of the invention.

Claims (5)

1. work plane goaf side is to coal body Width of Plastic Zone monitoring defining method, it is characterized in that: comprise the steps:
(a) within the scope of mining in advance work plane (1) 50 ~ 100m, in non-back production side (3) of stope drift active workings (2), drill through different depth lateral aperture (4) several;
A borehole stressmeter (5) is arranged in (b) lateral aperture (4) described in each;
C described borehole stressmeter (5) is all connected to signals collecting station (6) by (), described signals collecting station (6) is arranged in described stope drift active workings (2), advanced described stope (1) 200 ~ 300m;
D () is powered to described borehole stressmeter (5) and described signals collecting station (6), start to monitor continuously each monitoring point vertical stress;
E () pushes to adopt to during apart from described signals collecting station (6) 10 ~ 20m until described stope (1), the stress data utilizing described signals collecting station (6) to gather generates stress changing curve;
F () determines the stress changing curve type of each monitoring point before and after work plane pushes to adopt, accordingly, determine work plane goaf (7) interior side direction coal body Width of Plastic Zone.
2. work plane goaf side according to claim 1 is to coal body Width of Plastic Zone monitoring defining method, it is characterized in that: the stress changing curve type of the described each monitoring point of step (f) is divided into two kinds, one is " rising-decline-stable " type curve (8), and one is " rise-stablize " type curve (9).
3. work plane goaf side according to claim 1 and 2 is to coal body Width of Plastic Zone monitoring defining method, it is characterized in that: the described lateral aperture of step (a) (4) is all helped perpendicular to lane, the strike separation of adjacent two described lateral apertures (4) is 1m, and depth difference is 1m.
4. monitor defining method according to the arbitrary described work plane goaf side of claims 1 to 3 to coal body Width of Plastic Zone, it is characterized in that: at above-mentioned work plane goaf side in coal body Width of Plastic Zone monitoring defining method, the described lateral aperture of step (a) (4) quantity is 10, and minimum-depth is 5m.
5. monitor defining method according to the arbitrary described work plane goaf side of Claims 1 to 4 to coal body Width of Plastic Zone; it is characterized in that: described borehole stressmeter (5) and described signals collecting station (6) connection line help (3) to arrange near described non-back production, and use casing protection.
CN201410370533.9A 2014-07-31 2014-07-31 Monitoring determining method for working face goaf lateral coal plastic area width Active CN104265364B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104931353A (en) * 2015-07-17 2015-09-23 天地科技股份有限公司 Coal pillar plastic zone testing method and device
CN108050982A (en) * 2016-01-22 2018-05-18 山东科技大学 A kind of method for monitoring coal body transversely deforming on-line
CN109211180A (en) * 2018-09-14 2019-01-15 华北科技学院 Longwall top coal caving deformation of the surrounding rock in tunnel divided stages and determining method
CN110630328A (en) * 2019-08-19 2019-12-31 天地科技股份有限公司 Method and system for measuring protective range of mining protective layer

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104931353A (en) * 2015-07-17 2015-09-23 天地科技股份有限公司 Coal pillar plastic zone testing method and device
CN108050982A (en) * 2016-01-22 2018-05-18 山东科技大学 A kind of method for monitoring coal body transversely deforming on-line
CN109211180A (en) * 2018-09-14 2019-01-15 华北科技学院 Longwall top coal caving deformation of the surrounding rock in tunnel divided stages and determining method
CN110630328A (en) * 2019-08-19 2019-12-31 天地科技股份有限公司 Method and system for measuring protective range of mining protective layer

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