CN116070416A - Comprehensive test method for determining vertical three-zone development height of stope overlying strata - Google Patents
Comprehensive test method for determining vertical three-zone development height of stope overlying strata Download PDFInfo
- Publication number
- CN116070416A CN116070416A CN202211655311.2A CN202211655311A CN116070416A CN 116070416 A CN116070416 A CN 116070416A CN 202211655311 A CN202211655311 A CN 202211655311A CN 116070416 A CN116070416 A CN 116070416A
- Authority
- CN
- China
- Prior art keywords
- zone
- drilling
- height
- test method
- sigma
- 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
- 238000010998 test method Methods 0.000 title claims abstract description 24
- 238000011161 development Methods 0.000 title claims abstract description 22
- 238000005553 drilling Methods 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 208000008918 voyeurism Diseases 0.000 claims abstract description 16
- 238000002347 injection Methods 0.000 claims abstract description 15
- 239000007924 injection Substances 0.000 claims abstract description 15
- 239000011435 rock Substances 0.000 claims description 24
- 239000003245 coal Substances 0.000 claims description 17
- 238000003825 pressing Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 12
- 238000012360 testing method Methods 0.000 claims description 11
- 238000005065 mining Methods 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 238000012795 verification Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 2
- 230000008859 change Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000243 solution Substances 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/11—Complex mathematical operations for solving equations, e.g. nonlinear equations, general mathematical optimization problems
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
- G06Q50/02—Agriculture; Fishing; Forestry; Mining
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Data Mining & Analysis (AREA)
- Pure & Applied Mathematics (AREA)
- Business, Economics & Management (AREA)
- Mathematical Optimization (AREA)
- Mathematical Analysis (AREA)
- General Engineering & Computer Science (AREA)
- Computational Mathematics (AREA)
- Geometry (AREA)
- General Business, Economics & Management (AREA)
- Animal Husbandry (AREA)
- Health & Medical Sciences (AREA)
- Economics (AREA)
- General Health & Medical Sciences (AREA)
- Human Resources & Organizations (AREA)
- Marketing (AREA)
- Primary Health Care (AREA)
- Strategic Management (AREA)
- Tourism & Hospitality (AREA)
- Marine Sciences & Fisheries (AREA)
- Agronomy & Crop Science (AREA)
- Evolutionary Computation (AREA)
- Computer Hardware Design (AREA)
- Geology (AREA)
- Operations Research (AREA)
- Geochemistry & Mineralogy (AREA)
- Algebra (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Databases & Information Systems (AREA)
- Software Systems (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a comprehensive test method for determining the vertical three-zone development height of a stope overlying strata, which combines a drilling technology with the existing test method, has strong applicability compared with a direct test method, avoids the defects of a single test method such as poor peeping effect influenced by shrinkage cavities, large water injection error influenced by aquifers and the like, and has less interference factors and high accuracy compared with an indirect test method, so that the improvement guarantee of the vertical three-zone development height of the overlying strata is accurately determined.
Description
Technical Field
The invention relates to the technical field of test of the development height of a stope cover rock three-zone, in particular to a comprehensive test method for determining the development height of a stope cover rock vertical three-zone.
Background
When the coal seam is mined, under the influence of mining, the overlying strata sequentially presents a caving zone, a fracture zone and a bending sinking zone, wherein the caving zone and the fracture zone are key areas for gas occurrence and migration. When underground coal is mined, gas overrun phenomenon often occurs on a stoping working face, particularly on an upper corner of the working face, and in order to solve the problem, a pressure relief gas extraction technology is adopted by coal mine enterprises, and the key of the technology is to accurately determine the range of a rock covering fracture zone. In addition, for coal mining under water, the development heights of water guiding fracture zones after coal seam mining are different, so that water-containing bodies at different layers of overburden can be caused to flow into a mine, and the safety production of the mine is threatened. Therefore, the development height of the water guide fracture zone after the coal seam is mined is accurately determined, and the method has great significance for safe production of working faces and prevention and control of coal mine water damage.
The existing test methods can be classified into a direct test method and an indirect test method according to the test methods. The direct test method mainly comprises a drilling liquid laundry consumption method and a downhole double-end water injection method, and the methods are simple and practical to operate, are basic methods for obtaining the development height of the overburden rock, but often influence the measurement result when encountering a stratum with crack development or stronger water enrichment. The indirect test method mainly comprises optical fiber sensing, resistivity test and microseismic monitoring, and the method has good applicability, but is easy to be interfered in the actual measurement process, and the deviation of test results is larger.
Disclosure of Invention
Aiming at the technical defects, the invention aims to provide a comprehensive test method for determining the development height of the vertical three zones of the stope overlying strata.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a comprehensive test method for determining the development height of a vertical triple zone of a stope overlying strata, which comprises the following steps:
(a) Determining the development height of a goaf caving zone and a fracture zone through theoretical calculation;
(b) Constructing an inclined drilling hole with a certain angle in the return air cis-slot towards the goaf, so that the drilling hole penetrates through the collapse zone and the fracture zone;
(c) In the drilling process of the step (b), each drill rod is constructed, once drilling information is collected, drilling results are obtained according to the change of the drilling information and lithology characteristics, and three heights are pre-judged;
(d) After the drilling construction is completed, a drilling peeping instrument is used for peeping in the holes, peeping results are obtained according to the development form of cracks in the holes, and the pre-judging height is verified;
(e) After the peeping in the hole is finished, water injection test is carried out by using underground double-end water injection equipment, a water injection result is obtained according to a water injection leakage curve, and three zones of distribution are finally confirmed through mutual verification among the three.
Preferably, the goaf caving zone height is calculated in the step (a) by adopting the following formula:
(1) When a single coal seam is mined:
wherein: h m -collapse of the belt height; m-coal seam mining thickness; w-roof sag value; k is the rock breaking coefficient;
(2) When thick coal seam is mined in layers:
hard rock stratum (sigma) Pressing ＝40～80MPa)：
Medium hard rock stratum (sigma) Pressing ＝20～40MPa)：
Weak rock formation(σ Pressing ＝10～20MPa)：
Extremely soft weak strata (sigma) Pressing ﹤10MPa)：
Wherein: h m -collapse of the belt height; m-coal seam mining thickness.
Preferably, the fracture zone height is calculated in step (a) using the following formula:
hard rock stratum (sigma) Pressing ＝40～80MPa)：
Medium hard rock stratum (sigma) Pressing ＝20～40MPa)：
Weak rock stratum (sigma) Pressing ＝10～20MPa)：
Extremely soft weak strata (sigma) Pressing ﹤10MPa)：
Wherein: h L -collapse of the belt height; m-coal seam mining thickness.
Preferably, the angle of the inclined borehole in step (b) is 52 ° in elevation and-90 ° in azimuth.
Preferably, the information while drilling in step (c) comprises cuttings amount, feed force, torque, rate of drilling, rotational speed.
Preferably, step (c) determines the fracture zone to fracture zone boundary with a while-drilling information amplitude greater than 30% and determines the fracture zone to curved dip zone boundary with a while-drilling information amplitude greater than 15% when predicting the three zone height.
The invention has the beneficial effects that:
the invention combines the drilling technology with the existing testing method to form a comprehensive testing method of 'detection while drilling + peeping in holes + plugging and leakage detection', and the three-band distribution is accurately determined by mutual verification of three methods; compared with a direct test method, the application range is wide; compared with the indirect test method, the accuracy is high.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a plan view of an L1 aperture arrangement of one embodiment of the present invention.
FIG. 2 is a cross-sectional view of an L1 aperture arrangement of one embodiment of the invention.
Fig. 3 is a graph of L1 drill cuttings for one embodiment of the present invention.
Fig. 4 is a graph of L1 Kong Kuishi results for one embodiment of the invention.
FIG. 5 is a graph of L1 hole water injection for one embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 5, the embodiment provides a comprehensive test method for determining the development height of a vertical triple zone of a stope cover rock, which specifically includes the following steps:
a. the maximum fracture zone height is calculated by theory
b. The test site of the embodiment is positioned at the 22301 gas treatment roadway and 20m away from the belt gate way, a crack zone drilling hole L1 is constructed at the position 40m behind the goaf of the 22301 gas treatment roadway, the elevation angle is 52 degrees, the azimuth angle is-90 degrees, the footage is 80m, and the vertical distance is controlled to be 60m. An L1 drilling layout plan view and a section view are shown in fig. 1 and 2;
c. collecting information while drilling in the drilling construction process; the drilling information acquired by the embodiment is the drilling cuttings quantity, the drilling cuttings quality is acquired once for each 1.5m drill rod construction, and an L1 drilling cuttings graph is shown in FIG. 3;
d. as can be seen from fig. 3, the amount of the drill cuttings in the L1 hole increases by more than 15% at 53.19m, and the lithology is unchanged, which indicates that the drill cuttings are positioned at the boundary between the fracture zone and the bending subsidence zone, and the fracture zone height is predicted to be 53.19m according to the while-drilling information;
e. after the drilling construction is completed, a drilling peeping instrument is used for peeping in the hole, and the result of L1 Kong Kuishi is shown in fig. 4;
f. as can be seen from fig. 4, the L1 hole has shrinkage at 25.21m, and the combination of the drilling construction position indicates that the hole penetrates through the gas control roadway overburden layer and enters into the fracture zone; the L1 hole has lighter rock mass damage at 54.36m, and the crack is not expanded, so that the crack enters a bending sinking zone from a collapse zone, the height of the crack zone is 54.36m according to the peeping result in the hole, and the pre-judging result is further verified;
g. after the peeping in the hole is finished, water injection test is carried out by using underground double-end water injection equipment, and the water injection leakage curve of the L1 hole is shown in figure 5;
h. as can be seen from FIG. 5, the L1 Kong Loushi amount increases rapidly at 25.22m, and the leakage amount is greater than 25×10 -3 m 3 And/min, indicating that the gas passes through the overlying strata of the gas control roadway and enters a fracture zone; gradually reducing at 53.58m, and enabling the leakage amount to be smaller than 15 multiplied by 10 < -3 > m < 3 >/min, wherein the leakage amount is indicated to pass through the fracture zone and enter the bending subsidence zone, the fracture zone height is 53.58m according to the water injection result, and the difference between the detection while drilling and the peeping result in the hole is smaller, so that the test result is accurate and reliable.
i. The fracture zone height is determined to be 53.19 m-54.36 m according to the comprehensive test result of 'detection while drilling + peeping in holes + plugging and leakage detection'.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (6)
1. The comprehensive test method for determining the vertical three-zone development height of the stope overlying strata is characterized by comprising the following steps:
(a) Determining the development height of a goaf caving zone and a fracture zone through theoretical calculation;
(b) Constructing an inclined drilling hole with a certain angle in the return air cis-slot towards the goaf, so that the drilling hole penetrates through the collapse zone and the fracture zone;
(c) In the drilling process of the step (b), each drill rod is constructed, once drilling information is collected, drilling results are obtained according to the change of the drilling information and lithology characteristics, and three heights are pre-judged;
(d) After the drilling construction is completed, a drilling peeping instrument is used for peeping in the holes, peeping results are obtained according to the development form of cracks in the holes, and the pre-judging height is verified;
(e) After the peeping in the hole is finished, water injection test is carried out by using underground double-end water injection equipment, a water injection result is obtained according to a water injection leakage curve, and three zones of distribution are finally confirmed through mutual verification among the three.
2. The comprehensive test method for determining the vertical three zone development height of the stope cover rock according to claim 1, wherein the goaf caving zone height is calculated in the step (a) by adopting the following formula:
(1) When a single coal seam is mined:
wherein: h m -collapse of the belt height; m-coal seam mining thickness; w-roof sag value; k is the rock breaking coefficient;
(2) When thick coal seam is mined in layers:
hard rock stratum (sigma) Pressing ＝40～80MPa)：
Medium hard rock stratum (sigma) Pressing ＝20～40MPa)：
Weak rock stratum (sigma) Pressing ＝10～20MPa)：
Extremely soft weak strata (sigma) Pressing ﹤10MPa)：
Wherein: h m -collapse of the belt height; m-coal seam mining thickness.
3. The comprehensive test method for determining the vertical three zone development height of the stope cover rock according to claim 1, wherein the following formula is adopted in the step (a) to calculate the fracture zone height:
hard rock stratum (sigma) Pressing ＝40～80MPa)：
Medium hard rock stratum (sigma) Pressing ＝20～40MPa)：
Weak rock stratum (sigma) Pressing ＝10～20MPa)：
Extremely soft weak strata (sigma) Pressing ﹤10MPa)：
/>
Wherein: h L -collapse of the belt height; m-coal seam mining thickness.
4. The integrated test method for determining the vertical three zone development height of a stope cover rock of claim 1, wherein the angle of the inclined borehole in step (b) is 52 ° in elevation, and-90 ° in azimuth.
5. The integrated test method for determining the vertical three zone development height of a stope cover rock of claim 1, wherein the while-drilling information in step (c) comprises drill cuttings amount, feeding force, torque, drilling rate and rotation speed.
6. The method of claim 1, wherein step (c) determines the boundary between the fracture zone and the fracture zone with an increase in information while drilling of greater than 30% and determines the boundary between the fracture zone and the curved dip zone with an increase in information while drilling of greater than 15% when the three zone heights are predicted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211655311.2A CN116070416A (en) | 2022-12-21 | 2022-12-21 | Comprehensive test method for determining vertical three-zone development height of stope overlying strata |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211655311.2A CN116070416A (en) | 2022-12-21 | 2022-12-21 | Comprehensive test method for determining vertical three-zone development height of stope overlying strata |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116070416A true CN116070416A (en) | 2023-05-05 |
Family
ID=86172563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211655311.2A Pending CN116070416A (en) | 2022-12-21 | 2022-12-21 | Comprehensive test method for determining vertical three-zone development height of stope overlying strata |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116070416A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116929237A (en) * | 2023-07-17 | 2023-10-24 | 安徽理工大学 | Application and use method of optical fiber in coal mine roof three-zone monitoring |
-
2022
- 2022-12-21 CN CN202211655311.2A patent/CN116070416A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116929237A (en) * | 2023-07-17 | 2023-10-24 | 安徽理工大学 | Application and use method of optical fiber in coal mine roof three-zone monitoring |
| CN116929237B (en) * | 2023-07-17 | 2024-04-12 | 安徽理工大学 | Application and use method of optical fiber in coal mine roof three-zone monitoring |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113464121B (en) | Method for determining gamma geosteering drilling track of azimuth while drilling | |
| CN112711847B (en) | Method for determining surface subsidence coefficients of key layer at different positions of overlying strata | |
| CN106285776B (en) | A kind of unrestrained method of roof water based on Technology of Directional Drilling | |
| CN112780340B (en) | Method for preventing rock burst in advance in underground coal mine area | |
| CN113685132B (en) | Ground double-hole combined water inrush prevention method for overburden movement monitoring and separation layer water drainage | |
| CN104265270A (en) | Carbonatite fissure cavern drilling track design and control method | |
| CN110735629B (en) | Water guide fracture zone height judging method based on upward drilling speed | |
| CN111932128B (en) | Method for determining directional drilling grouting horizon of confined aquifer of coal seam floor | |
| Zhang et al. | Practice and understanding of sidetracking horizontal drilling in old wells in Sulige Gas Field, NW China | |
| CN116070416A (en) | Comprehensive test method for determining vertical three-zone development height of stope overlying strata | |
| Meng et al. | In situ investigation and numerical simulation of the failure depth of an inclined coal seam floor: a case study | |
| CN104989330A (en) | Coalbed gas recovery method | |
| CN114397421A (en) | Mining coal seam floor damage depth monitoring method | |
| CN113622952A (en) | Comprehensive treatment method for water damage of mountain green coal in structurally complex area | |
| CN112948924A (en) | Near unconsolidated formation mining water flowing fractured zone height determination method based on overlying strata structure | |
| CN116771348A (en) | Method for reducing dynamic pressure influence of main roadway in last mining and optimizing stoping line coal pillar | |
| Tan et al. | The height of fractured zones caused by strip Wongawilli mining in a shallow buried coal seam underlying a hard roof | |
| CN114439428A (en) | Enhanced extraction method for coal bed gas horizontal well under through goaf group | |
| CN114444266A (en) | Feasibility evaluation method for improving recovery upper limit safety mining of coal seam under near unconsolidated formation | |
| Kasperczyk et al. | Tiltmeter monitoring to verify growth of hydraulic fractures used for preconditioning of strong roof rock | |
| Song et al. | A method for determining the overburden failure height of coal mining based on the change of drilling speed and the leakage of sectional water injection in underground upward bolehole | |
| CN115450693B (en) | Large-drop deep-discharging method and system for steeply inclined aquifer | |
| Ge et al. | Research on horizontal directional staged fracturing technology for roof of surface wells | |
| CN117468963A (en) | Grouting water plugging method for hard rock stratum | |
| CN118014414A (en) | Mining depth and mining thickness ratio calculation and evaluation method considering rock stratum strength |
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 |