CN112253226A - Reinforcing filling body in structural filling mining and stability monitoring method thereof - Google Patents
Reinforcing filling body in structural filling mining and stability monitoring method thereof Download PDFInfo
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- CN112253226A CN112253226A CN202011050794.4A CN202011050794A CN112253226A CN 112253226 A CN112253226 A CN 112253226A CN 202011050794 A CN202011050794 A CN 202011050794A CN 112253226 A CN112253226 A CN 112253226A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 34
- 238000005065 mining Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 29
- 230000003068 static effect Effects 0.000 claims description 17
- 239000002994 raw material Substances 0.000 claims description 5
- 239000011435 rock Substances 0.000 claims description 5
- 230000003993 interaction Effects 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 2
- 239000003245 coal Substances 0.000 description 12
- 230000007613 environmental effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000368 destabilizing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011664 nicotinic acid Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000004162 soil erosion Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 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
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/20—Investigating the presence of flaws
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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- Chemical Kinetics & Catalysis (AREA)
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- General Health & Medical Sciences (AREA)
- Mining & Mineral Resources (AREA)
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Abstract
A reinforced filling body in structural filling mining and a stability monitoring method thereof belong to the technical field of structural filling mining, and aim to provide a method for reinforcing the filling body in underground structural filling mining and monitoring the stability of the filling body by research. The stability monitoring system monitors the stability of the filling body in the load bearing process, a metal grid net is poured inside the filling body, and the bearing capacity of the filling body is improved by utilizing the restraint effect of the metal grid net on the transverse expansion of the filling body during bearing. The metal grid net is poured in the filling body, so that the integrity of the filling body is improved, the long-term stability is improved, and the filling body is prevented from being exploded and damaged due to overlarge stress in the bearing process to cause sudden instability. And the strain and the resistance of the filling body are monitored in the whole bearing period of the filling body, so that the stability monitoring of the whole life period of the filling body is realized.
Description
Technical Field
The invention belongs to the technical field of structural filling mining, and particularly relates to a reinforced filling body in structural filling mining and a stability monitoring method thereof.
Background
Coal is a main energy source in China and an important industrial raw material, and has an important position in the energy structure in China. However, in the coal mining process, due to the large-scale, high-strength and extensive mining in the past, many environmental problems, such as surface subsidence, underground water level reduction, soil erosion, atmosphere pollution and the like, are caused, so that the contradiction between resources and the environment is increasingly prominent. Aiming at the caused ecological environment problems, how to rely on the progress of the technical field to ensure that the influence on the ecological environment is minimized when coal is mined is an urgent problem to be solved. The students propose a series of advanced concepts for promoting the coordination of coal mining and ecological environment and mining concepts and technologies oriented to different situations, such as green mining, bionic mining, water retention mining, scientific mining precision mining and the like according to the scientific and practical requirements. Filling mining is an environment-friendly mining technology and is an effective means for solving resource and environmental problems.
Because the mechanical conditions of the surrounding rock and the overlying strata of the filling stope are quite complex, the filling body limits the movement of the overlying strata by preventing the deformation and the displacement of the top plate, and can effectively weaken the settlement of the earth surface. Therefore, in the filling exploitation, the design of the filling body is a key ring, and whether the design is reasonable or not directly influences the moving deformation control effect of the overlying strata and the safety and stability of the underground space. Therefore, the reinforcement of the filling body in the filling and mining of the underground structure and the method for monitoring the stability of the filling body are significant.
Disclosure of Invention
The invention aims to provide a method for reinforcing a filling body in underground structure filling mining and researching the monitoring of the stability of the filling body.
The invention adopts the following technical scheme:
a reinforcing filling body in structural filling mining comprises a plurality of gangue cemented filling bodies and a plurality of metal grid nets pre-buried in the gangue cemented filling bodies, wherein an overlying strata is arranged above the gangue cemented filling bodies.
A stability monitoring method for a reinforced filling body in structural filling mining comprises the following steps:
firstly, preparing raw materials and a metal grid net of a gangue cementing filling body;
secondly, embedding a metal grid net in the mold, and pouring to obtain a pouring-molded reinforcing filling body;
filling the cast and molded reinforcing filling body according to the bearing capacity required by the overlying rock stratum;
fourthly, monitoring the change of strain in the whole period by using a static load type strain gauge in the process of bearing the whole service life of the reinforced filling body;
and fifthly, monitoring the change of the resistivity of the reinforced filling body in the whole period by using a resistivity tester in the process of bearing the whole service life of the reinforced filling body.
And in the third step, filling comprises column filling or strip filling or interaction of column filling and strip filling.
And in the fourth step, the static load type strain gauge is used for monitoring the change of the strain in the whole period, and comprises a strain sheet and a static load type strain gauge, wherein the strain sheet is adhered to the surface of the reinforced filling body, the strain sheet is connected with the static load type strain gauge through a lead, and the static load type strain gauge is connected with a computer.
And in the fifth step, the resistivity tester is used for monitoring the change of the resistivity in the whole period, and comprises a resistivity tester which is connected with the metal grid net through a resistance clamp.
And an epoxy resin layer is arranged on the surface of the strain gauge.
The invention has the following beneficial effects:
1. according to the invention, the metal grid net is poured inside the filling body, and the bearing capacity of the filling body is improved by utilizing the constraint effect of the metal grid net on the transverse expansion of the filling body during bearing.
2. The metal grid net is poured in the filling body, so that the integrity of the filling body is improved, the long-term stability is improved, and the situation that the filling body is suddenly unstable due to explosion damage caused by overlarge stress in the bearing process is prevented.
3. And the strain and the resistance of the filling body are monitored in the whole bearing period of the filling body, so that the stability monitoring of the whole life period of the filling body is realized.
Drawings
Fig. 1 is a schematic structural view of pouring metal grid nets in column filling of the present invention, wherein a is 1 metal grid net, b is two metal grid nets, and c is 3 metal grid nets;
fig. 2 is a schematic structural view of the metal grid net poured in strip filling of the present invention, wherein a is 1 metal grid net, b is two metal grid nets, and c is 3 metal grid nets;
FIG. 3 is a schematic view of a stability monitoring apparatus of the present invention;
FIG. 4 is a schematic diagram of three different filling modes of the present invention, wherein a is pillar filling, b is the interaction of pillar filling and stripe filling, and c is stripe filling;
FIG. 5 is a schematic view of the column packing detection system shown in FIG. 4, section 1-1;
wherein: 1-a metal grid mesh; 2-a resistance clamp; 3-resistivity wire; 4-resistivity tester; 5-reinforcing the filling body; 6-strain gauge; 7-strain gauge wire; 8-static strain gauge; 9-overburden.
Detailed Description
The invention is further explained by taking a Xinyang coal mine as an example by combining the attached drawings.
The Shanxi province Lulian mountain east foot of the mining area in the middle of the loess plateau is covered by loess, the loess gully is relatively developed and belongs to the landform of low hills, and the relative height difference of the landform is about 120 mm. The new yang mining area mainly adopts coal of Shanxi group No. 2, the average thickness of the coal bed is 2.5 m, the inclination angle of the coal bed is 2-11 degrees (average 9 degrees), and the coal bed belongs to a coal bed which has simple and stable structure and can be mined. The direct roof of the No. 2 coal seam is sandy mudstone, the thickness is about 1.5 m, the unidirectional compressive strength is 27.125 MPa, and the tensile strength is 1.61 MPa. And carrying out strip-type structure filling mining on the No. 2 coal seam.
As shown in the figure, the reinforcing filling body in the structural filling mining comprises a plurality of gangue cemented filling bodies and a plurality of metal grid nets pre-buried in the gangue cemented filling bodies, wherein an overlying strata is arranged above the gangue cemented filling bodies.
A stability monitoring method for a reinforced filling body in structural filling mining comprises the following steps:
firstly, preparing raw materials and a metal grid mesh of the gangue cementing filling body, wherein the raw materials are prepared according to the following proportion:
secondly, embedding a metal grid net in the mold, and pouring to obtain a pouring-molded reinforcing filling body;
filling the cast and molded reinforcing filling body according to the bearing capacity required by the overlying rock stratum;
fourthly, monitoring the change of strain in the whole period by using a static load type strain gauge in the process of bearing the whole service life of the reinforced filling body;
and fifthly, monitoring the change of the resistivity of the reinforced filling body in the whole period by using a resistivity tester in the process of bearing the whole service life of the reinforced filling body.
And in the third step, filling comprises column filling or strip filling or interaction of column filling and strip filling.
And in the fourth step, the static load type strain gauge is used for monitoring the change of the strain in the whole period, and comprises a strain sheet and a static load type strain gauge, wherein the strain sheet is adhered to the surface of the reinforced filling body, the strain sheet is connected with the static load type strain gauge through a lead, and the static load type strain gauge is connected with a computer.
And in the fifth step, the resistivity tester is used for monitoring the change of the resistivity in the whole period, and comprises a resistivity tester which is connected with the metal grid net through a resistance clamp.
And dynamically monitoring the stability of the filling body according to the change of the strain value and the resistivity of the filling body in the service life cycle.
The surface of foil gage is equipped with the epoxy layer to avoid the influence of environmental factor to meeting an emergency.
The principle of the invention is as follows: and pouring a metal grid net in the filling body, and constraining the loaded filling body by utilizing the hoop effect of the metal grid net on the filling body so as to improve the bearing capacity and integrity of the filling body in the service cycle and prevent the filling body from suddenly destabilizing. In the stability monitoring system, the internal damage and the creep value of the filling body are monitored by utilizing a resistivity tester and a static load type strain gauge monitoring means, the filling body can be timely maintained according to the internal damage condition and the creep value, and the stability monitoring of the filling body in the service life cycle is realized.
If the numerical values of the static load type strain gauge and the resistivity tester of one or more filling bodies are changed greatly in the service life cycle, the filling bodies are maintained in time, and therefore the stability of the filling bodies in the service life cycle is monitored.
Claims (6)
1. The utility model provides a reinforcing obturator in structure cut-and-fill exploitation which characterized in that: the gangue cementing filling structure comprises a plurality of gangue cementing filling bodies and a plurality of metal grid nets pre-buried in the gangue cementing filling bodies, wherein an overlying rock stratum is arranged above the gangue cementing filling bodies.
2. A method of monitoring the stability of a reinforced infill in structural cut and fill mining as claimed in claim 1, wherein: the method comprises the following steps:
firstly, preparing raw materials and a metal grid net of a gangue cementing filling body;
secondly, embedding a metal grid net in the mold, and pouring to obtain a pouring-molded reinforcing filling body;
filling the cast and molded reinforcing filling body according to the bearing capacity required by the overlying rock stratum;
fourthly, monitoring the change of strain in the whole period by using a static load type strain gauge in the process of bearing the whole service life of the reinforced filling body;
and fifthly, monitoring the change of the resistivity of the reinforced filling body in the whole period by using a resistivity tester in the process of bearing the whole service life of the reinforced filling body.
3. A method of monitoring the stability of a reinforced infill in structural cut and fill mining as claimed in claim 2, wherein: and in the third step, filling comprises column filling or strip filling or interaction of column filling and strip filling.
4. A method of monitoring the stability of a reinforced infill in structural cut and fill mining as claimed in claim 2, wherein: and in the fourth step, the static load type strain gauge is used for monitoring the change of the strain in the whole period, and comprises a strain sheet and a static load type strain gauge, wherein the strain sheet is adhered to the surface of the reinforced filling body, the strain sheet is connected with the static load type strain gauge through a lead, and the static load type strain gauge is connected with a computer.
5. A method of monitoring the stability of a reinforced infill in structural cut and fill mining as claimed in claim 2, wherein: and in the fifth step, the resistivity tester is used for monitoring the change of the resistivity in the whole period, and comprises a resistivity tester which is connected with the metal grid net through a resistance clamp.
6. A method of monitoring the stability of a reinforced infill in structural cut and fill mining as claimed in claim 2, wherein: and an epoxy resin layer is arranged on the surface of the strain gauge.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011050794.4A CN112253226B (en) | 2020-09-29 | 2020-09-29 | Reinforcing filling body in structure filling exploitation and stability monitoring method thereof |
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|---|---|---|---|
| CN202011050794.4A CN112253226B (en) | 2020-09-29 | 2020-09-29 | Reinforcing filling body in structure filling exploitation and stability monitoring method thereof |
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| Publication Number | Publication Date |
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| CN112253226A true CN112253226A (en) | 2021-01-22 |
| CN112253226B CN112253226B (en) | 2023-05-16 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699432A (en) * | 2016-01-13 | 2016-06-22 | 太原理工大学 | Paste filling effect evaluating method |
| CN206571532U (en) * | 2017-03-29 | 2017-10-20 | 山东科技大学 | A kind of new equipment for obturation STABILITY MONITORING |
| CN111006993A (en) * | 2019-11-22 | 2020-04-14 | 太原理工大学 | Stability detection device for gangue cemented filling material and use method thereof |
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2020
- 2020-09-29 CN CN202011050794.4A patent/CN112253226B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699432A (en) * | 2016-01-13 | 2016-06-22 | 太原理工大学 | Paste filling effect evaluating method |
| CN206571532U (en) * | 2017-03-29 | 2017-10-20 | 山东科技大学 | A kind of new equipment for obturation STABILITY MONITORING |
| CN111006993A (en) * | 2019-11-22 | 2020-04-14 | 太原理工大学 | Stability detection device for gangue cemented filling material and use method thereof |
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| CN112253226B (en) | 2023-05-16 |
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