CN113550754A - Method and system for performing advanced drilling of coal seam roadway based on bottom suction roadway cross-layer drilling - Google Patents
Method and system for performing advanced drilling of coal seam roadway based on bottom suction roadway cross-layer drilling Download PDFInfo
- Publication number
- CN113550754A CN113550754A CN202111088945.XA CN202111088945A CN113550754A CN 113550754 A CN113550754 A CN 113550754A CN 202111088945 A CN202111088945 A CN 202111088945A CN 113550754 A CN113550754 A CN 113550754A
- Authority
- CN
- China
- Prior art keywords
- roadway
- drilling
- water
- tunneling
- area
- 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.)
- Granted
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 135
- 239000003245 coal Substances 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 130
- 230000005641 tunneling Effects 0.000 claims abstract description 107
- 238000001514 detection method Methods 0.000 claims abstract description 42
- 230000002159 abnormal effect Effects 0.000 claims abstract description 25
- 230000001939 inductive effect Effects 0.000 claims abstract description 9
- 230000005856 abnormality Effects 0.000 claims abstract description 8
- 238000000605 extraction Methods 0.000 claims description 14
- 239000011435 rock Substances 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 11
- 238000009412 basement excavation Methods 0.000 abstract description 6
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000008569 process Effects 0.000 description 7
- 238000007599 discharging Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000002547 anomalous effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/003—Arrangement of measuring or indicating devices for use during driving of tunnels, e.g. for guiding machines
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
-
- 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
- E21F16/00—Drainage
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)
- Environmental & Geological Engineering (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The application relates to the technical field of tunnel construction, and provides a method and a system for performing advanced drilling of a coal seam roadway based on a bottom suction roadway cross-layer drill hole. The method comprises the following steps: carrying out geophysical prospecting on an underground excavation roadway from a plurality of different detection directions before advanced water drainage, and dividing the underground excavation roadway into a safe area, a water-affected area and an abnormal area; wherein, the safe area is the driving working face without water body threat, no top plate water or the top plate water is weak water-rich, the bottom plate belt pressure coefficient is less than 0.06
The area of (a); the water threatened area is an area threatened by a known water body on the tunneling working face; the abnormal area is the geophysical prospecting abnormality and has the inducing effect on the mine water damageThe geological formation and the area of the drilled water; in a safety area, performing bottom suction roadway layer-through drilling; and determining whether the drilling is supplemented in the water threatened area or not according to the loosening circle range of the tunneling roadway of the target coal seam, the water body threat on the tunneling working face and the final hole position of the bottom suction roadway cross-layer drilling.
Description
Technical Field
The application relates to the technical field of tunnel construction, in particular to a method and a system for performing advanced drilling of a coal seam roadway based on a bottom suction roadway cross-layer drill hole.
Background
With the increasing complexity of mine mining conditions, the threat of water damage to the mine is also increased. The method has the advantages that occurrence conditions in a certain range in front of the tunnel are detected in the process of tunneling the tunnel, the method is of great significance in ensuring safe tunneling of the tunnel, and corresponding basis can be provided for coal mine water prevention and control, so that accidents of water collapse on the wall surface are reduced. How to advance the water drainage of a target coal seam tunneling roadway and eliminate the threat of flood during the tunneling process of the roadway becomes a problem to be solved urgently during the tunneling of the coal seam.
Disclosure of Invention
The application aims to provide a method and a system for performing advanced drilling of a coal seam roadway based on a bottom suction roadway cross-layer drill hole, so as to solve or alleviate the problems in the prior art.
In order to achieve the above purpose, the present application provides the following technical solutions:
the application provides a method for performing advanced drilling of a coal seam roadway based on a bottom suction roadway cross-layer drilling hole, which comprises the following steps: s101, carrying out geophysical prospecting on an underground tunneling roadway from a plurality of different detection directions before advanced water drainage, and dividing the underground tunneling roadway into a safe area, a water-affected area and an abnormal area; wherein, the safe area is the driving working face without water body threat, no top plate water or the top plate water is weak water-rich, the bottom plate belt pressure coefficient is less than 0.06
The area of (a); the water threatened area is an area threatened by a known water body on the tunneling working face; the abnormal area is a geological structure with geophysical prospecting abnormality and an inducing effect on mine water damage and a region with drilled water; s102, in a safety area, performing bottom suction roadway layer-crossing drilling; and S103, determining whether the holes are additionally drilled in the water-threatened area or not according to the loosening circle range of the tunneling roadway of the target coal seam, the water body threat on the tunneling working face and the final hole position of the bottom suction roadway cross-layer drilling.
Preferably, in step S101, geophysical prospecting is performed on the underground excavation roadway from 3 transverse probing directions and 1 longitudinal probing direction before advanced water drainage; wherein, 3 horizontal detection directions are respectively: the direction of detection to the front top plate at an included angle of 45 degrees with the roadway top plate, the direction of detection to the front along the direction of the rock stratum, and the direction of detection to the front bottom plate at an included angle of 45 degrees with the roadway bottom plate; the 1 longitudinal detection direction is perpendicular to the tunneling direction and is used for detecting the top plate and the bottom plate of the roadway.
Preferably, in the safety zone, the performing of the bottom suction roadway cross-layer drilling comprises: and performing bottom suction roadway cross-layer drilling according to the determined relative position relationship between the bottom suction roadway and the tunneling roadway and the determined hole opening position, the final hole spacing, the drilling density, the drilling length and the hole opening angle.
Preferably, according to the formula:
calculating effective extraction radius of cross-layer drill hole
Determining the final hole spacing of the bottom suction roadway cross-layer drilling; in the formula (I), the compound is shown in the specification,
the gas flow in the drill hole is extracted;
is the flow attenuation coefficient;
the extraction time is;
is the average density of the coal bed;
the gas extraction rate is;
the original gas content in the coal bed; if 2
Less than the tunneling width of the coal seam roadway
And the distance between the final holes of the bottom suction roadway cross-layer drilling
(ii) a If 2
The distance between the final holes of the bottom suction roadway cross-layer drill hole is larger than the tunneling width of the coal seam roadway
Is less than or equal toWidth of coal seam roadway
。
Preferably, according to the formula:
calculating the number of the cross-layer drill holes along the width direction of the roadway
To determine the drilling density of the bottom suction roadway cross-layer drilling.
Preferably, the drilling length of the bottom suction roadway cross-layer drilling hole penetrates through the full thickness of a target coal seam, and the final hole is at least 0.5 m above the top plate and/or the bottom plate of the coal seam; the bottom suction roadway cross-layer drill holes are uniformly arranged in a fan shape and cover at least 20 meters outside outline lines of two sides of the target coal seam tunneling roadway.
Preferably, step S103 includes: according to the formula:
calculating the radius of a loosening ring of a tunneling roadway of a target coal seam
To determine if additional drilling is required; wherein the content of the first and second substances,
the equivalent circle radius of the roadway;
is the average volume force of the overburden;
is buried depth;
the cohesive force of the surrounding rock;
the internal friction angle of the surrounding rock;
if the tunneling working face is threatened by known base plate pressure bearing water and the bottom suction roadway is located in the range of the loosening zone of the tunneling roadway of the target coal seam, supplementary drilling is conducted below the tunneling roadway base plate along the target coal seam, the supplementary drilling covers the range of two sides below the tunneling roadway base plate, and the position of the final hole of the supplementary drilling exceeds the range of the loosening zone of the tunneling roadway of the target coal seam by at least 1 meter.
Preferably, at least 2 is arranged below the bottom plate of the tunneling roadway along the target coal seam
At least 1 drilling hole is formed in each of two sides of the center line of the roadway and is located right below the target coal seam tunneling roadway; wherein the content of the first and second substances,
greater than or equal to 2.
Preferably, the water threat comprises: and sealing bad drilled holes, old water, roof water and floor confined water.
The embodiment of the application still provides a system for carry out advance probing of coal seam tunnel based on take out tunnel cross-layer drilling, include: the area dividing unit is configured to perform geophysical prospecting on the underground tunneling roadway from a plurality of different detection directions before advanced water drainage, and divide the underground tunneling roadway into a safe area, a water-affected area and an abnormal area; wherein, the safe area is the working surface of the driving tunnel without water body threat, no roof water or weak water-rich roof water, and the base plate belt pressure coefficient is less than 0.06
The area of (a); the water threatened area is an area threatened by a known water body on the tunneling working face; the abnormal area is a geological structure with geophysical prospecting abnormality and an inducing effect on mine water damage and a region with drilled water; a cross-layer drilling unit configured to perform drilling in a safe areaDrawing a roadway, penetrating a layer and drilling; and the supplementary drilling unit is configured to determine whether supplementary drilling is carried out in the water threatened area or not according to the loosening circle range of the tunneling roadway of the target coal seam, the water body threat on the tunneling working face and the final hole position of the bottom suction roadway cross-layer drilling.
Compared with the closest prior art, the technical scheme of the embodiment of the application has the following beneficial effects:
according to the technical scheme provided by the embodiment of the application, geophysical prospecting is carried out on an underground tunneling roadway before advanced water drainage from a plurality of different detection directions, and the underground tunneling roadway is divided into a safe area, a water-affected area and an abnormal area; and (3) carrying out real-time bottom suction roadway cross-layer full control in the safety area, and determining whether to additionally drill holes in the water threatened area or not according to the loosening circle range of the tunneling roadway of the target coal seam, the water body threat on the tunneling working face and the final hole position of the bottom suction roadway cross-layer drill holes. Therefore, the underground bottom suction roadway cross-layer drilling is used for replacing the advance water drainage work of the tunneling roadway, before the roadway is tunneled, the geophysical prospecting is used for advance detection, meanwhile, the advance drilling of the bottom suction roadway cross-layer drilling is combined for detecting the tunneling roadway from a plurality of different detection directions, the comprehensive coverage of the tunneling roadway of the target coal seam is achieved, the found abnormal area or the water-affected area can be subjected to encryption detection and treatment, the working loss of the advance detection construction of the target coal seam is effectively reduced, the drilling precision is effectively improved, the tunneling efficiency is improved, and the water-borne threat in the tunneling process of the roadway is eliminated.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. Wherein:
fig. 1 is a schematic flow chart of a method for advanced drilling of a coal seam roadway based on a bottom suction roadway cross-layer borehole according to some embodiments of the present application;
fig. 2 is a technical roadmap of a method of advanced drilling of coal seam roadways based on a bottom suction roadway cross-layer borehole according to some embodiments of the present application;
FIG. 3 is a schematic view of a geophysical prospecting direction provided in accordance with some embodiments of the present application;
fig. 4 is a schematic cross-sectional view of a safe zone undercut cross-layer borehole provided in accordance with some embodiments of the present application;
fig. 5 is a schematic top view of a safe zone bottom entry cross-layer borehole provided in accordance with some embodiments of the present application;
fig. 6 is a schematic cross-sectional view of a top plate water threat zone bottom suction roadway cross-layer borehole provided in accordance with some embodiments of the present application;
fig. 7 is a schematic cross-sectional view of a bottom suction roadway cross-layer borehole of a confined water threat zone of a floor provided in accordance with some embodiments of the present application;
fig. 8 is a schematic illustration of an anomalous zone bottom draw lane supplementary borehole provided in accordance with some embodiments of the present application;
fig. 9 is a schematic structural diagram of a system for advanced drilling of a coal seam roadway based on a bottom suction roadway cross-layer borehole according to some embodiments of the present application.
Detailed Description
The present application will be described in detail below with reference to the embodiments with reference to the attached drawings. The various examples are provided by way of explanation of the application and are not limiting of the application. In fact, it will be apparent to those skilled in the art that modifications and variations can be made in the present application without departing from the scope or spirit of the application. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. It is therefore intended that the present application cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
In the embodiment provided by the application, the concept of one-hole multi-purpose and branch-saving consumption reduction of the gas drainage drill hole of the bottom suction roadway is comprehensively considered, the advanced water detection method for fully utilizing the construction of the layer-penetrating drill hole of the bottom suction roadway to fully cover the tunneling roadway of the target coal seam is designed, the advanced water detection and drainage of the tunneling roadway are replaced by the underground layer-penetrating drill hole of the bottom suction roadway, the advanced detection is carried out by physical detection before the tunneling of the roadway, meanwhile, the advanced drilling of the layer-penetrating drill hole of the bottom suction roadway is combined to detect the front part and two sides of the tunneling roadway, the detected abnormal area or the threatened area by water is encrypted and probed, the advanced drainage or grouting reinforcement mode is adopted to treat the water leakage, the working loss of the advanced detection construction of the target coal seam is reduced, the drilling precision is effectively improved, the tunneling efficiency is improved, and the water flood threat in the tunneling process is eliminated.
Fig. 1 is a schematic flow chart of a method for advanced drilling of a coal seam roadway based on a bottom suction roadway cross-layer borehole according to some embodiments of the present application; as shown in fig. 1 and fig. 2, the method for performing advanced drilling of a coal seam roadway based on a bottom-pumping roadway cross-layer borehole includes:
s101, carrying out geophysical prospecting on an underground tunneling roadway from a plurality of different detection directions before advanced water drainage, and dividing the underground tunneling roadway into a safe area, a water-affected area and an abnormal area;
in the embodiment of the application, the safe area does not have water body threat for the driving face, no top plate water or the top plate water is weak water-rich, and the bottom plate belt pressure coefficient is less than 0.06
The area of (a); the water threatened area is an area threatened by a known water body on the tunneling working face; the abnormal area is an area with geophysical prospecting abnormality, geological structure with inducing effect on mine water damage and drilling water.
In the embodiment of the application, according to the principle of 'geophysical prospecting is advanced and drilling verification', the underground driving roadway is subjected to geophysical prospecting before advanced water drainage. In the geophysical prospecting, geophysical prospecting is performed from 4 detection directions, specifically, as shown in fig. 3, geophysical prospecting is performed on an underground roadway from 3 transverse detection directions and 1 longitudinal detection direction before advanced water drainage; wherein, 3 horizontal detection directions are respectively: a direction (45-degree direction of the top plate) which forms an included angle of 45 degrees with a roadway top plate and is detected to a front top plate, a direction (0-degree direction) which is detected to the front along a rock stratum direction and is detected to the front bottom plate, and a direction (45-degree direction of the bottom plate) which forms an included angle of 45 degrees with a roadway bottom plate and is detected to the front bottom plate; the 1 longitudinal detection direction is perpendicular to the tunneling direction and is a direction (a top plate direction or a bottom plate direction) for detecting a top plate and a bottom plate of the roadway. Therefore, the method has the advantages that the occurrence conditions and the change trend of the front water body are analyzed through multi-angle and multi-sector data acquisition, the complete front space information is obtained as far as possible, compared with the existing detection method, the detection method is multiple in detection angle and wide in detection range, and the detection precision is effectively improved.
In the embodiment of the application, the well field is divided into 3 areas according to the coal seam geological conditions and the water prevention and control principle: safe zones, water-threatened zones and abnormal zones. The safe area is an area which is determined by comprehensive analysis directions such as ground geophysical prospecting, underground geophysical prospecting, production mining and theoretical pushing and has no geophysical prospecting abnormal area, no geological structure with induction effect on mine water damage, no closed bad drill holes, old vacant water and other water threats. The weak water-richness of the safety zone refers to the water inflow per drilling unit
Wherein the unit water inflow of the drilling hole is the caliber 91mmThe water level of the pumping water is reduced by 10mThe standard is.
In the embodiment of the application, the water-affected area is an area where the heading face is subjected to water body maintenance systems such as known roof water, floor confined water, old air water or known water guiding (containing) structures; the abnormal area is a geophysical prospecting abnormal area, a geological structure with an inducing effect on mine water damage and a region with drilled water. Geological structures which have inducing effect on mine water damage include, but are not limited to, faults, collapse columns and the like.
S102, in a safety area, performing bottom suction roadway layer-crossing drilling;
and as shown in fig. 4, 5, 6 and 7, performing the bottom suction roadway cross-layer drilling according to the determined relative position relationship between the bottom suction roadway and the tunneling roadway, and the determined hole opening position, final hole distance, drilling hole density, drilling hole length and hole opening angle. Wherein, the relative position of the bottom suction roadway and the tunneling roadway comprises the vertical distance, the horizontal distance and the layer position of the bottom suction roadway and the tunneling roadway; the vertical distance between the bottom suction roadway and the tunneling roadway is the safe distance between the bottom suction roadway and the tunneling roadway; the position of the hole (the drill hole pulling height) is determined according to the field conditions and the water detecting and discharging construction design (including the non-qualitative conditions of the hole opening angle and the drill hole length); the drilling density can be determined according to the number of the drilling holes in each group and the drilling distance.
In the actual production process, because dynamic pressure caused in the process of working face tunneling or stoping can be transferred to the coal seam floor in a certain mode, the surrounding rocks of the roadway of the floor are redistributed, and the surrounding rocks of the roadway are continuously deformed. Therefore, parameters such as vertical distance, horizontal distance and the like between the bottom suction roadway and the coal seam can directly influence the engineering quantity of cross-layer drilling, gas extraction and water exploration and drainage effects. Therefore, the relative position of the bottom suction roadway and the tunneling roadway is determined, so that the engineering quantity of cross-layer drilling can be effectively reduced, and the gas extraction and water exploration and drainage effects are improved.
In the embodiment of the application, the drill hole is used for exploring the geological structure of the target coal seam and extracting gas, so that the distance between the final holes of the drill hole is determined according to the extraction radius of the cross-layer drill hole. Specifically, the effective extraction radius of the cross-layer drill hole is calculated according to the formula (1). Equation (1) is as follows:
in the formula (I), the compound is shown in the specification,
represents the effective extraction radius of the cross-layer borehole in meters
，
The unit of the gas flow in the drill hole is gas extraction
；
Is the flow attenuation coefficient with the unit of 1/year
；
For extracting time, the unit is year
；
Is the average density of the coal bed in units of tons per cubic meter
；
The gas extraction rate is;
is the original gas content in the coal bed and has the unit of cubic meter per ton
。
Wherein the content of the first and second substances,
is the flow attenuation coefficient with the unit of 1/year
In particular, the amount of the surfactant is,
，
。
in the examples of this application, if 2
Less than the tunneling width of the coal seam roadway
(unit is meter)
) And the distance between the final holes of the bottom suction roadway cross-layer drilling
(ii) a If 2
The distance between the final holes of the bottom suction roadway cross-layer drill hole is larger than or equal to the tunneling width of the coal seam roadway
Less than or equal to the tunneling width of coal seam roadway
. Thereby, by restricting the spacing of the final holes, it is ensured that at least one of the boreholes can penetrate the roof of the coal seam.
In the embodiment of the application, when the drilling density is determined, the number of the cross-layer drilling holes in the roadway width direction is calculated according to the formula (2). Equation (2) is as follows:
in the embodiment of the application, each group of construction of cross-layer drilling
Drilling holes and constructing on two sides of central line of tunnel
And each group of cross-layer drill holes are spaced by 5 meters. For example, according to the advance drilling distance of 100 meters, the maximum running tunneling distance is 70 meters, the advance distance is not less than 30 meters, 100 meters are taken as a unit, and each unit is arranged at least
And (4) drilling.
In the embodiment of the application, when the drilling hole length is determined, the drilling hole length of the bottom suction roadway cross-layer drilling hole penetrates through the full thickness of a target coal seam, and the final hole is at least 0.5 m above a top (bottom) plate of the coal seam; when the opening angle is determined, all the drill holes of the bottom suction roadway cross-layer drill holes are uniformly arranged in a fan shape, and the range of at least 20 meters outside the outline line of the two sides of the target coal seam tunneling roadway is covered. Therefore, the detection of the front and the two sides of the tunneling roadway is realized.
And S103, determining whether the holes are additionally drilled in the water-threatened area or not according to the loosening circle range of the tunneling roadway of the target coal seam, the water body threat on the tunneling working face and the final hole position of the bottom suction roadway cross-layer drilling.
In the embodiment of the application, the holes are drilled according to the design requirements, the hole forming rate is guaranteed during the drilling construction, and the holes are timely repaired in the areas which do not meet the design requirements. Firstly, determining the loosening zone range of the tunneling roadway of the target coal seam. Specifically, the loosening zone range is determined by combining well field hydrogeological conditions and geophysical prospecting results and simulating the surrounding rock damage condition of a roadway dug by a surrounding mine or a roadway of an adjacent working face of the coal seam.
In the embodiment of the application, the working face geological model is simplified, the equivalent circle is used for replacing a rectangular roadway, and the working face plastic damage width and the roadway surrounding rock loosening damage ring width are calculated. And (4) theoretically calculating the plastic zone of surrounding rock around the roadway, wherein the influence radius (radius of the loosening ring) is calculated according to a formula (3). Equation (3) is as follows:
wherein the content of the first and second substances,
radius of loose circle of target coal seam tunneling roadway, and unit is meter
，
Is equivalent circle radius of tunnel, and the unit is meter
；
Is the average volume force of the overburden in newtons per square meter
；
Is buried deep in kilometers
；
The cohesive force of the surrounding rock is in MPa
；
Is the internal friction angle of the surrounding rock.
If the tunneling working face is threatened by known base plate pressure bearing water and the bottom suction roadway is located in the range of the loosening zone of the tunneling roadway of the target coal seam, supplementary drilling is conducted below the tunneling roadway base plate along the target coal seam, the supplementary drilling covers the range of two sides below the tunneling roadway base plate, and the position of the final hole of the supplementary drilling exceeds the range of the loosening zone of the tunneling roadway of the target coal seam by at least 1 meter.
If the tunneling working face is threatened by the known roof water, the final hole position of the bottom suction roadway cross-layer drilling exceeds the radius of the loosening circle of the tunneling roadway of the target coal seam
At least 1 meter; the final hole position of the through-layer drilling is located within the range of the loosening ring, or the distance from the loosening ring is less than 1 meter, and the drilling is not needed to be supplemented. Namely, if the water threatened area of the top plate is superposed with the loose ring or is in the loose ring, the purpose of exploration can be achieved by drilling through layers.
In the embodiment of the application, at least 2 is arranged below the bottom plate of the tunneling roadway along the target coal seam
At least 1 drilling hole is arranged along two sides of the center line of the roadway and is positioned under the target coal seam tunneling roadway, wherein,
2 or more as shown in fig. 8.
In the embodiment of the application, for a geophysical prospecting abnormal region, firstly, determining the relative position of the geophysical prospecting abnormal region and a bottom suction roadway by combining well field hydrogeological conditions and geophysical prospecting results; then, at least 1 drill hole is constructed in the geophysical exploration abnormal area of the bottom suction roadway, and the position of a final hole enters the range of the abnormal area (as shown in fig. 7); and if hydrological abnormality occurs after drilling construction, finding out the water guiding condition, and treating the water guiding condition by utilizing an advanced drainage or grouting reinforcement mode.
In the embodiment of the application, the bottom suction roadway cross-layer drilling needs to be 30 meters ahead of the tunneling of the coal roadway; the command of the cross-layer drilling is verified to reach the standard, so that the drilling is real and effective; when geological conditions such as faults, collapse columns, broken zones and the like are greatly changed, targeted coal seam water exploration and drainage are required.
In the embodiment of the application, the bottom suction roadway is ahead of the coal roadway tunneling construction, and the multiple groups of detection construction processes of layer-crossing drilling can effectively meet the requirement that 30 meters of water-discharging coal pillars are reserved in front in the tunneling process of the tunneling roadway; the cross-layer drill holes are arranged in the roadway in a fan shape, and the final hole positions of the drill holes completely cover the range of 20 meters on two sides of the roadway of the upper coal seam, so that the requirement that the water detecting and discharging wall distance is not less than 20 meters can be effectively met; the cross-layer drill hole penetrates through the upper coal seam from the bottom pumping roadway to the top plate of the coal seam to be integrally covered, so that the upper coal seam is not influenced by bottom plate water in roadway excavation; when the stope face is constructed, the water discharging requirements are met, meanwhile, the gas extraction problem is solved, the utilization rate of the drilled holes is improved, and the effect of one hole with multiple purposes is achieved.
Fig. 9 is a schematic structural diagram of a system for advanced drilling of a coal seam roadway based on a bottom suction roadway cross-layer borehole according to some embodiments of the present application; as shown in fig. 9, the system for performing advanced drilling of a coal seam roadway based on a bottom suction roadway cross-layer drilling hole comprises: an area dividing unit 901, a cross-layer drilling unit 902 and a supplementary drilling unit 903.
The area dividing unit 901 is configured to perform geophysical prospecting on the underground excavation roadway from a plurality of different detection directions before advanced water drainage, and divide the underground excavation roadway into a safe area, a water-affected area and an abnormal area; wherein, the safe area is the working surface of the driving tunnel without water body threat, no roof water or weak water-rich roof water, and the base plate belt pressure coefficient is less than 0.06
The area of (a); the water threatened area is an area threatened by a known water body on the tunneling working face; the abnormal area is an area with geophysical prospecting abnormality, geological structure with inducing effect on mine water damage and drilling water.
A cross-layer drilling unit 902 configured to perform a bottom suction roadway cross-layer drilling in a safe area; and the supplementary drilling unit 903 is configured to determine whether supplementary drilling is performed in the water-threatened area according to the loosening circle range of the tunneling roadway of the target coal seam, the water body threat on the tunneling working face and the final hole position of the bottom suction roadway cross-layer drilling.
The system for performing advanced drilling of the coal seam roadway based on the bottom-suction roadway cross-layer drilled hole, provided by the embodiment of the application, can realize the steps and the flows of any method embodiment for performing advanced drilling of the coal seam roadway based on the bottom-suction roadway cross-layer drilled hole, and achieves the same beneficial effects, and the steps are not repeated one by one.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A method for performing advanced drilling of a coal seam roadway based on a bottom suction roadway cross-layer drill hole is characterized by comprising the following steps:
s101, carrying out geophysical prospecting on an underground tunneling roadway from a plurality of different detection directions before advanced water drainage, and dividing the underground tunneling roadway into a safe area, a water-affected area and an abnormal area; wherein, the safe area is the driving working face without water body threat, no top plate water or the top plate water is weak water-rich, the bottom plate belt pressure coefficient is less than 0.06
The area of (a); the water threatened area is an area threatened by a known water body on the tunneling working face; the abnormal area is a geological structure with geophysical prospecting abnormality and an inducing effect on mine water damage and a region with drilled water;
s102, in a safety area, performing bottom suction roadway layer-crossing drilling;
and S103, determining whether the holes are additionally drilled in the water-threatened area or not according to the loosening circle range of the tunneling roadway of the target coal seam, the water body threat on the tunneling working face and the final hole position of the bottom suction roadway cross-layer drilling.
2. The method for advanced drilling of coal seam roadway based on bottom-suction roadway cross-layer drilling hole according to claim 1, wherein in step S101,
carrying out geophysical prospecting on an underground tunneling roadway from 3 transverse detection directions and 1 longitudinal detection direction before advanced water detection and drainage; wherein, 3 horizontal detection directions are respectively: the direction of detection to the front top plate at an included angle of 45 degrees with the roadway top plate, the direction of detection to the front along the direction of the rock stratum, and the direction of detection to the front bottom plate at an included angle of 45 degrees with the roadway bottom plate; the 1 longitudinal detection direction is perpendicular to the tunneling direction and is used for detecting the top plate and the bottom plate of the roadway.
3. The method for advanced drilling of coal seam roadway based on bottom-suction roadway cross-layer drill hole according to claim 1, wherein in a safe area, implementing the bottom-suction roadway cross-layer drill hole comprises:
and performing bottom suction roadway cross-layer drilling according to the determined relative position relationship between the bottom suction roadway and the tunneling roadway and the determined hole opening position, the final hole spacing, the drilling density, the drilling length and the hole opening angle.
4. The method for advanced drilling of coal seam roadway based on bottom suction roadway cross-layer drilling according to claim 3,
according to the formula:
calculating effective extraction radius of cross-layer drill hole
Determining the final hole spacing of the bottom suction roadway cross-layer drilling; in the formula (I), the compound is shown in the specification,
the gas flow in the drill hole is extracted;
is the flow attenuation coefficient;
the extraction time is;
is the average density of the coal bed;
the gas extraction rate is;
the original gas content in the coal bed;
if 2
Less than the tunneling width of the coal seam roadway
And the distance between the final holes of the bottom suction roadway cross-layer drilling
(ii) a If 2
The distance between the final holes of the bottom suction roadway cross-layer drill hole is larger than the tunneling width of the coal seam roadway
Less than or equal to the tunneling width of coal seam roadway
。
5. The method for advanced drilling of coal seam roadway based on bottom suction roadway cross-layer drilling according to claim 4,
according to the formula:
calculating the number of the cross-layer drill holes along the width direction of the roadway
To determine the drilling density of the bottom suction roadway cross-layer drilling.
6. The method for advanced drilling of coal seam roadway based on bottom suction roadway cross-layer drilling hole according to claim 3,
the drilling length of the bottom suction roadway cross-layer drilling hole penetrates through the full thickness of a target coal seam, and the final hole is at least 0.5 m above the top plate and/or the bottom plate of the coal seam;
the bottom suction roadway cross-layer drill holes are uniformly arranged in a fan shape and cover at least 20 meters outside outline lines of two sides of the target coal seam tunneling roadway.
7. The method for performing advanced drilling of a coal seam roadway based on a bottom suction roadway cross-layer drill hole according to claim 1, wherein the step S103 comprises:
according to the formula:
calculating the radius of a loosening ring of a tunneling roadway of a target coal seam
To determine if additional drilling is required; wherein the content of the first and second substances,
the equivalent circle radius of the roadway;
is the average volume force of the overburden;
is buried deep in kilometers
；
The cohesive force of the surrounding rock;
the internal friction angle of the surrounding rock;
if the tunneling working face is threatened by known base plate pressure bearing water and the bottom suction roadway is located in the range of the loosening zone of the tunneling roadway of the target coal seam, supplementary drilling is conducted below the tunneling roadway base plate along the target coal seam, the supplementary drilling covers the range of two sides below the tunneling roadway base plate, and the position of the final hole of the supplementary drilling exceeds the range of the loosening zone of the tunneling roadway of the target coal seam by at least 1 meter.
8. The method for advanced drilling of coal seam roadway based on bottom suction roadway cross-layer drilling according to claim 7, characterized in that at least 2 is arranged below the bottom plate of the heading roadway along the target coal seam
At least 1 drilling hole is formed in each of two sides of the center line of the roadway and is located right below the target coal seam tunneling roadway; wherein the content of the first and second substances,
greater than or equal to 2.
9. The method for advanced drilling of coal seam roadway based on bottom suction roadway cross-layer borehole according to any of claims 1-8, characterized in that water body threat comprises: and sealing bad drilled holes, old water, roof water and floor confined water.
10. The utility model provides a system for carry out coal seam tunnel advanced drilling based on take out tunnel cross-layer drilling, its characterized in that includes:
the area dividing unit is configured to perform geophysical prospecting on the underground tunneling roadway from a plurality of different detection directions before advanced water drainage, and divide the underground tunneling roadway into a safe area, a water-affected area and an abnormal area; wherein, the safe area does not have water body threat for the driving tunnel working face, and does not have roof water or the roof water is weak richWater-based, the bottom plate pressed coefficient is less than 0.06
The area of (a); the water threatened area is an area threatened by a known water body on the tunneling working face; the abnormal area is a geological structure with geophysical prospecting abnormality and an inducing effect on mine water damage and a region with drilled water;
the layer-penetrating drilling unit is configured to implement layer-penetrating drilling of a bottom suction roadway in a safety area;
and the supplementary drilling unit is configured to determine whether supplementary drilling is carried out in the water threatened area or not according to the loosening circle range of the tunneling roadway of the target coal seam, the water body threat on the tunneling working face and the final hole position of the bottom suction roadway cross-layer drilling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111088945.XA CN113550754B (en) | 2021-09-16 | 2021-09-16 | Method and system for performing advanced drilling of coal seam roadway based on bottom suction roadway cross-layer drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111088945.XA CN113550754B (en) | 2021-09-16 | 2021-09-16 | Method and system for performing advanced drilling of coal seam roadway based on bottom suction roadway cross-layer drilling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113550754A true CN113550754A (en) | 2021-10-26 |
| CN113550754B CN113550754B (en) | 2021-12-10 |
Family
ID=78134631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111088945.XA Active CN113550754B (en) | 2021-09-16 | 2021-09-16 | Method and system for performing advanced drilling of coal seam roadway based on bottom suction roadway cross-layer drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113550754B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102116170A (en) * | 2011-01-27 | 2011-07-06 | 中国矿业大学 | Method for determining grid type layer-through drilling intervals of floor roadway |
| CN102777183A (en) * | 2012-07-24 | 2012-11-14 | 河南理工大学 | Baseboard lane hydraulic coal mining process |
| CN102797486A (en) * | 2012-08-30 | 2012-11-28 | 中国矿业大学 | Fabricated grilling anti-invert method for treating pucking |
| CN103291354A (en) * | 2013-05-20 | 2013-09-11 | 中国矿业大学 | Filling and reinforcing method for floor roadway cross-layer pressure-relief borehole |
| CN104763462A (en) * | 2015-04-07 | 2015-07-08 | 中国矿业大学 | Method for extracting high-pressure hydraulic cave-manufacturing gas from rock roadway crossing hole |
| CN105909254A (en) * | 2016-04-29 | 2016-08-31 | 中煤科工集团西安研究院有限公司 | Outburst coal seam floor pitch-up through-bed directional hole leading area shield coal roadway driving method |
| WO2018233149A1 (en) * | 2017-06-23 | 2018-12-27 | 中国矿业大学 | Argillaceous soft rock roadway partition multi-granularity grouting reinforcement method |
| CN109209472A (en) * | 2018-07-27 | 2019-01-15 | 中国矿业大学 | The coal seam pressure relief anti-burst method that a kind of punching, explosion, water filling intercouple |
| CN111997585A (en) * | 2020-07-15 | 2020-11-27 | 中煤科工集团西安研究院有限公司 | Coal mine transparent working face construction method based on cross-layer hole logging |
| CN112879079A (en) * | 2021-04-09 | 2021-06-01 | 平顶山天安煤业股份有限公司 | Full life cycle utilization method for bottom drainage roadway of outburst coal seam |
-
2021
- 2021-09-16 CN CN202111088945.XA patent/CN113550754B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102116170A (en) * | 2011-01-27 | 2011-07-06 | 中国矿业大学 | Method for determining grid type layer-through drilling intervals of floor roadway |
| CN102777183A (en) * | 2012-07-24 | 2012-11-14 | 河南理工大学 | Baseboard lane hydraulic coal mining process |
| CN102797486A (en) * | 2012-08-30 | 2012-11-28 | 中国矿业大学 | Fabricated grilling anti-invert method for treating pucking |
| CN103291354A (en) * | 2013-05-20 | 2013-09-11 | 中国矿业大学 | Filling and reinforcing method for floor roadway cross-layer pressure-relief borehole |
| CN104763462A (en) * | 2015-04-07 | 2015-07-08 | 中国矿业大学 | Method for extracting high-pressure hydraulic cave-manufacturing gas from rock roadway crossing hole |
| CN105909254A (en) * | 2016-04-29 | 2016-08-31 | 中煤科工集团西安研究院有限公司 | Outburst coal seam floor pitch-up through-bed directional hole leading area shield coal roadway driving method |
| WO2018233149A1 (en) * | 2017-06-23 | 2018-12-27 | 中国矿业大学 | Argillaceous soft rock roadway partition multi-granularity grouting reinforcement method |
| CN109209472A (en) * | 2018-07-27 | 2019-01-15 | 中国矿业大学 | The coal seam pressure relief anti-burst method that a kind of punching, explosion, water filling intercouple |
| CN111997585A (en) * | 2020-07-15 | 2020-11-27 | 中煤科工集团西安研究院有限公司 | Coal mine transparent working face construction method based on cross-layer hole logging |
| CN112879079A (en) * | 2021-04-09 | 2021-06-01 | 平顶山天安煤业股份有限公司 | Full life cycle utilization method for bottom drainage roadway of outburst coal seam |
Non-Patent Citations (3)
| Title |
|---|
| 刘明举等: "底板巷穿层钻孔水力冲孔防突技术", 《煤炭科学技术》 * |
| 刘震等: "下向穿层钻孔综合水力化防突技术研究", 《采矿与安全工程学报》 * |
| 吕栋男等: "水力冲孔增透技术的研究与应用", 《陕西煤炭》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113550754B (en) | 2021-12-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107044289B (en) | A kind of bored grouting blocks the water damage control method of overlying strata water producing fractures main channel | |
| CN109577982B (en) | Wall type continuous mining and continuous filling water-retaining coal mining and water resource migration monitoring and water damage early warning method | |
| Gao et al. | Influential factors and control of water inrush in a coal seam as the main aquifer | |
| Wang et al. | Karst geology and mitigation measures for hazards during metro system construction in Wuhan, China | |
| CN103323887B (en) | The appraisal procedure of a kind of Coal Exploitation Dynamic stability district coal-seam gas reserves and system | |
| CN105909254B (en) | Projecting coal bed bottom plate, which is faced upward, wears the advanced area cover coal roadway tunneling method of layer directional hole | |
| CN107083988A (en) | Mining induced fissure band gas pumping technical method based on km directional drilling | |
| WO2015158153A1 (en) | Water conservation method used in coal mining process | |
| CN103742149A (en) | Method for re-mining residual floor coal in fully-mechanized top coal caving face | |
| CN107165626A (en) | A kind of coal-face floods prevention method with cranny development country rock top plate | |
| CN112392431A (en) | Technology for preventing and treating water damage of coal seam roof by dynamic pressure-maintaining grouting and plugging of horizontal long drill hole in mining fracture zone | |
| CN109162731B (en) | Water inrush grouting treatment method for deep mining of iron mine area | |
| CN104314610A (en) | Coal road stripe region burst-preventing method | |
| CN106761902B (en) | A kind of stereo synthesis pressure relief gas pumping mining method suitable for soft rock protective coat extracted | |
| CN107740707A (en) | Thick coal-layer mining water damage prevention and controls under a kind of deep high artesian | |
| CN110645039A (en) | Comprehensive control method for rock burst and gas composite disaster of thick and hard roof | |
| CN111827878B (en) | Method for quickly and accurately probing hidden water inrush channel of coal seam floor | |
| CN110645040A (en) | Outburst coal seam 'Wuding' gas treatment method based on directional drilling machine | |
| CN115788435A (en) | System and method for preventing rock burst in coal mine from up and down in three-dimensional manner | |
| CN113622952A (en) | Comprehensive treatment method for water damage of mountain green coal in structurally complex area | |
| CN113756808A (en) | Combined pressure relief method for blasting and large-diameter drilling of steeply inclined super-thick hard coal seam | |
| CN113550754B (en) | Method and system for performing advanced drilling of coal seam roadway based on bottom suction roadway cross-layer drilling | |
| CN106285777B (en) | The method that flood mine mineral building discharges water in advance | |
| CN112211666B (en) | Coal face blind area distinguishing method | |
| CN113294203A (en) | Water protection method for preventing and controlling coal uncovering during safe tunneling of water-rich coal seam rock roadway |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |