CN112483185A - Method for observing rock burst danger range under three-dimensional coal pillar - Google Patents
Method for observing rock burst danger range under three-dimensional coal pillar Download PDFInfo
- Publication number
- CN112483185A CN112483185A CN202011510250.1A CN202011510250A CN112483185A CN 112483185 A CN112483185 A CN 112483185A CN 202011510250 A CN202011510250 A CN 202011510250A CN 112483185 A CN112483185 A CN 112483185A
- Authority
- CN
- China
- Prior art keywords
- observation
- borehole
- coal pillar
- stress
- observing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003245 coal Substances 0.000 title claims abstract description 60
- 239000011435 rock Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000005065 mining Methods 0.000 claims abstract description 11
- 238000010276 construction Methods 0.000 claims abstract description 7
- 238000005553 drilling Methods 0.000 claims abstract description 5
- 238000009933 burial Methods 0.000 description 2
- 230000035772 mutation Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a method for observing a rock burst danger range under a three-dimensional coal pillar, which comprises the following steps: step one, analyzing influence boundaries of three-dimensional coal pillars: preliminarily determining the influence boundary of the three-dimensional coal pillar according to occurrence conditions of the three-dimensional coal pillar, mining history background, mine pressure and rock stratum movement observation data; step two, tunnel observation drilling construction: according to the coal seam roadway layout, stress observation drill holes are respectively constructed before and after the roadway enters a coal pillar influence area, the depths are consistent, the apertures are consistent, and comparison observation is carried out; step three, relative stress comparison observation: and (3) installing an active pressure-bearing type borehole stress meter in the observation borehole, wherein the depth of the borehole is 7-8m, the distance is 10-15m, observing the relative stress of a plurality of boreholes, and observing the borehole with sudden stress change, wherein the borehole can be regarded as a coal pillar influence boundary and an impact danger range.
Description
Technical Field
The invention belongs to the technical field of coal mining, and particularly relates to a method for observing a rock burst danger range under a three-dimensional coal pillar.
Background
Rock burst is one of the most serious disasters of coal mines in China. Because the geological conditions of coal mines in China are complex and changeable, the number of faults is large, the coal bed variability is large, and a plurality of large coal pillars are usually left in coal mining, so that the hidden danger of serious rock burst is caused in mining of lower coal beds. Factors influencing rock burst comprise construction, burial depth, roof, coal bed hardness, mining factors and the like, wherein unreasonable coal pillar problems caused by the mining factors are the most common influencing factors of the rock burst with large range, particularly the rock burst of deep three-dimensional coal pillars under the condition of impacting dangerous coal beds and hard roofs is serious, and the rock burst is easy to happen in mining activities. How to solve the three-dimensional coal pillar type rock burst is a major technical problem faced by coal mines. Under the condition, the rock burst is difficult to achieve the degree of complete control by adopting the conventional measures of improving roadway layout, coal seam water injection, strong support, strong pressure relief of the coal seam, top breaking, bottom breaking and the like. With the increase of mining depth, especially when the coal pillar is close to the coal bed and a hard top plate exists, the range and the risk of predicting the impact risk are the precondition for preventing and controlling the impact. Therefore, stope rock burst prediction and control under the conditions of three-dimensional coal pillar influence, high stress and large burial depth are important problems to be solved urgently.
At present, the prediction of the rock burst danger range under the condition is basically consistent with that of a conventional stope, the prediction mainly comprises ore pressure observation, microseismic, a drilling cutting method and the like, and the conventional observation method is difficult to quantify due to the fact that three-dimensional coal pillar irregularity and rock stratum combination difference under the deep condition are large. Until now, no effective observation method for the impact danger range aiming at the specific coal bed condition that the three-dimensional coal pillar influences the rock burst exists. Conventional monitoring techniques of conventional methods have difficulty quantitatively predicting impact hazard ranges. And (4) combining with a roadway construction project, performing head-on point distribution of the roadway and continuous observation of the roadway backward path, and acquiring the stress influence range of the related coal pillars.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide an impact risk range determining method adopting relative stress change aiming at the situation that the impact risk range is difficult to quantify under the condition of a three-dimensional coal pillar.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a method for observing a rock burst danger range under a three-dimensional coal pillar comprises the following steps:
step one, analyzing influence boundaries of three-dimensional coal pillars: preliminarily determining the influence boundary of the three-dimensional coal pillar according to occurrence conditions of the three-dimensional coal pillar, mining history background, mine pressure and rock stratum movement observation data;
step two, tunnel observation drilling construction: according to the coal seam roadway layout, stress observation drill holes are respectively constructed before and after the roadway enters a coal pillar influence area, the depths are consistent, the apertures are consistent, and comparison observation is carried out;
step three, relative stress comparison observation: and (3) installing an active pressure-bearing type borehole stress meter in the observation borehole, wherein the depth of the borehole is 7-8m, the distance is 10-15m, observing the relative stress of a plurality of boreholes, and observing the borehole with sudden stress change, wherein the borehole can be regarded as a coal pillar influence boundary and an impact danger range.
The invention has the positive effects that:
1. the coal pillar influence boundary can be preliminarily determined by observing the rock stratum movement and the pressure propagation angle of the stereo coal pillar area and combining the coal pillar interlayer spacing;
2. through arranging observation drill holes in the coal seam roadway, the contrast observation of relative stress is carried out, and the boundaries influenced by coal pillars and not influenced by the coal pillars can be obviously distinguished.
Drawings
FIG. 1 is a schematic view of a coal pillar influencing boundary, FIG. 2 is a schematic view of a borehole arrangement, and FIG. 3 is a stress curve.
Detailed Description
The embodiment of the invention provides a method for observing a rock burst danger range under a three-dimensional coal pillar, which comprises the following steps:
firstly, determining a coal pillar influence area according to data such as geological mining conditions of a specific working face of a three-dimensional coal pillar area, mine pressure reports and the like and by combining specific rock stratum movement data, wherein A is a coal pillar area, and B is an influence area, which is shown in figure 1;
and secondly, according to the construction progress of the coal seam roadway, observation drill holes are respectively arranged inside and outside the affected area, and drilling parameters, construction processes and the like are completely consistent. The diameter of the drilled hole is 42mm, the distance is 10-15m, and the depth is 8-10m, as shown in figure 2;
and thirdly, mounting the pressure-bearing borehole stress meter sensor at the bottom of the hole, observing the stress change condition, determining the influence range of the coal pillar according to the stress mutation, wherein the 2 and 3 curves belong to the mutation, and see fig. 3.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. A method for observing a rock burst danger range under a three-dimensional coal pillar is characterized by comprising the following steps: the method comprises the following steps:
step one, analyzing influence boundaries of three-dimensional coal pillars: preliminarily determining the influence boundary of the three-dimensional coal pillar according to occurrence conditions of the three-dimensional coal pillar, mining history background, mine pressure and rock stratum movement observation data;
step two, tunnel observation drilling construction: according to the coal seam roadway layout, stress observation drill holes are respectively constructed before and after the roadway enters a coal pillar influence area, the depths are consistent, the apertures are consistent, and comparison observation is carried out;
step three, relative stress comparison observation: and (3) installing an active pressure-bearing type borehole stress meter in the observation borehole, wherein the depth of the borehole is 7-8m, the distance is 10-15m, observing the relative stress of a plurality of boreholes, and observing the borehole with sudden stress change, wherein the borehole can be regarded as a coal pillar influence boundary and an impact danger range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011510250.1A CN112483185A (en) | 2020-12-18 | 2020-12-18 | Method for observing rock burst danger range under three-dimensional coal pillar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011510250.1A CN112483185A (en) | 2020-12-18 | 2020-12-18 | Method for observing rock burst danger range under three-dimensional coal pillar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112483185A true CN112483185A (en) | 2021-03-12 |
Family
ID=74914776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011510250.1A Pending CN112483185A (en) | 2020-12-18 | 2020-12-18 | Method for observing rock burst danger range under three-dimensional coal pillar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112483185A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101344012A (en) * | 2008-08-05 | 2009-01-14 | 山东省尤洛卡自动化装备股份有限公司 | Dynamic monitoring system of coal mine roof plate |
| CN102644482A (en) * | 2012-05-18 | 2012-08-22 | 河南大有能源股份有限公司 | Rock burst predicting and warning method |
| CN103104294A (en) * | 2013-02-01 | 2013-05-15 | 湖南科技大学 | Rock burst prediction method |
| CN104101313A (en) * | 2014-08-04 | 2014-10-15 | 山东科技大学 | Method for quantitative observation determination of impact coal body volume expansion |
| CN106443784A (en) * | 2016-10-20 | 2017-02-22 | 山东科技大学 | Fault zone rock burst dangerousness monitoring method |
| CN109915140A (en) * | 2019-04-13 | 2019-06-21 | 山东科技大学 | Press control method to a kind of irregular gob-surrounded pillar roadway bump |
| CN111608663A (en) * | 2020-04-29 | 2020-09-01 | 临沂矿业集团菏泽煤电有限公司 | Omnibearing pressure relief method for rock burst dangerous roadway of thick coal seam working face |
-
2020
- 2020-12-18 CN CN202011510250.1A patent/CN112483185A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101344012A (en) * | 2008-08-05 | 2009-01-14 | 山东省尤洛卡自动化装备股份有限公司 | Dynamic monitoring system of coal mine roof plate |
| CN102644482A (en) * | 2012-05-18 | 2012-08-22 | 河南大有能源股份有限公司 | Rock burst predicting and warning method |
| CN103104294A (en) * | 2013-02-01 | 2013-05-15 | 湖南科技大学 | Rock burst prediction method |
| CN104101313A (en) * | 2014-08-04 | 2014-10-15 | 山东科技大学 | Method for quantitative observation determination of impact coal body volume expansion |
| CN106443784A (en) * | 2016-10-20 | 2017-02-22 | 山东科技大学 | Fault zone rock burst dangerousness monitoring method |
| CN109915140A (en) * | 2019-04-13 | 2019-06-21 | 山东科技大学 | Press control method to a kind of irregular gob-surrounded pillar roadway bump |
| CN111608663A (en) * | 2020-04-29 | 2020-09-01 | 临沂矿业集团菏泽煤电有限公司 | Omnibearing pressure relief method for rock burst dangerous roadway of thick coal seam working face |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109611143B (en) | Roof hydraulic fracturing multi-parameter comprehensive monitoring system and fracturing effect judging method | |
| CN111270987B (en) | Method for accurately preventing and controlling rock burst in remote area under coal mine | |
| CN209761499U (en) | Roof hydraulic fracturing multi-parameter comprehensive monitoring system | |
| CN102644482B (en) | Rock burst predicting and warning method | |
| CN105909254B (en) | Projecting coal bed bottom plate, which is faced upward, wears the advanced area cover coal roadway tunneling method of layer directional hole | |
| CN112780340B (en) | Method for preventing rock burst in advance in underground coal mine area | |
| CN103939099A (en) | Method for controlling strong shock risk coal seam group rock burst | |
| CN112901169B (en) | Impact instability judging and anti-impact mining method for asymmetrical island working surface | |
| CN115788435A (en) | System and method for preventing rock burst in coal mine from up and down in three-dimensional manner | |
| CN110905596A (en) | Hard roof type rock burst prevention and treatment method based on change of medium properties | |
| CN112576305A (en) | Method for preventing and controlling water damage of working surface separation layer | |
| CN111396118A (en) | Coal seam group rapid rock cross-cut coal uncovering outburst eliminating method | |
| CN114215530A (en) | Rapid roadway driving method for hard roof directional hydraulic fracturing gob-side roadway | |
| Wang et al. | Advanced directional drilling technology for gas drainage and exploration in Australian coal mines | |
| CN113756808A (en) | Combined pressure relief method for blasting and large-diameter drilling of steeply inclined super-thick hard coal seam | |
| CN117027954B (en) | System and method for monitoring overlying strata and coal pillars of roof of gob-side entry | |
| CN112377256B (en) | Impact danger large-diameter drilling hole inspection method based on microseism monitoring | |
| CN112031772B (en) | Method for inducing overall damage of overlying residual coal pillars by using high-pressure water jet | |
| CN113338931A (en) | Method for controlling strong mine pressure of stope by ground pre-splitting high-position inclined coal pillar structure | |
| CN112483185A (en) | Method for observing rock burst danger range under three-dimensional coal pillar | |
| CN117167011A (en) | Series-parallel connection full-length pressure relief hole distribution method for broken surrounding rock based on long horizontal holes of top plate | |
| CN115163172B (en) | Advanced pre-extraction rapid coal uncovering method for gas tunnel | |
| CN115288607A (en) | Large-diameter drilling pressure relief method for high horizontal stress area of regional structure | |
| CN115030719A (en) | Method for preventing and controlling rock burst by combining hydraulic fracturing of thick and hard rock stratum with pressure relief of coal seam | |
| CN107143375A (en) | A kind of comprehensive outburst control method in great burying gently inclined seam region |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210312 |
|
| RJ01 | Rejection of invention patent application after publication |