CN112901272A - Geophysical prospecting and drilling cooperative advanced water detection and drainage construction method - Google Patents
Geophysical prospecting and drilling cooperative advanced water detection and drainage construction method Download PDFInfo
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- CN112901272A CN112901272A CN202110057466.5A CN202110057466A CN112901272A CN 112901272 A CN112901272 A CN 112901272A CN 202110057466 A CN202110057466 A CN 202110057466A CN 112901272 A CN112901272 A CN 112901272A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 264
- 238000001514 detection method Methods 0.000 title claims abstract description 123
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F16/00—Drainage
Abstract
The invention provides a geophysical prospecting and drilling cooperative advanced prospecting water drainage construction method, which comprises the following steps: s1, clearing the roadway; s2, detecting water-endowing property information in each direction in the roadway by adopting a mine transient electromagnetic method exploration device, and determining a warning line and a water detection line in the tunneling direction of the roadway; s3, when tunneling to a position between the warning line and the water detection line, observing whether the surrounding rock of the roadway is moist, if so, stopping tunneling, drilling a water detection hole on the tunnel face, and discharging water; if no moisture condition exists between the warning line and the water detecting line, the roadway continues to be tunneled; s4, when the tunnel is tunneled to a water detection line, drilling a water detection hole on the face, and discharging water in time if water is discharged; and in the process of tunneling the roadway, the elevation of the bottom plate of the roadway is lowered for a certain distance to drill a water detection hole on the face, and if water exists, water is drained in time through the water detection hole. The construction method has the advantages of higher efficiency, strong operability, reasonable method and lower cost.
Description
Technical Field
The invention belongs to the technical field of mine exploration, and particularly relates to a geophysical prospecting and drilling cooperative advanced prospecting drainage construction method.
Background
With the development of social economy in China, the development prospects of urban rails and underground mines are good, and various problems of tunnel construction are brought about due to the fact that underground space construction projects are increased continuously. The problem of sudden water seepage and mud gushing is often encountered in the construction of underground engineering, and a large amount of gushing water, particularly confined water, is extremely difficult to treat. The water control exploration in the safe range of the operation area is needed. At present, the commonly used methods in China are hydrogeological analysis, water exploration drilling and the like, the method is single, and the defects of multiple working procedures, long construction period, difficulty in detection accuracy and the like exist.
Therefore, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The invention aims to provide a geophysical prospecting and drilling cooperative advanced prospecting drainage construction method, which at least solves the problems that the existing water detection method has multiple processes, long period, difficulty in accurate detection and the like.
In order to achieve the above purpose, the invention provides the following technical scheme:
a geophysical prospecting and drilling cooperative advanced prospecting water drainage construction method comprises the following steps:
step S1, before physical exploration, cleaning the roadway and suspending production work to meet physical exploration conditions;
step S2, the physical exploration is to use a mine transient electromagnetic exploration device to detect a tunnel, before the tunnel is tunneled, the mine transient electromagnetic exploration device is used to detect water bearing information in each direction in the tunnel, and a warning line and a water detection line in the tunneling direction of the tunnel are determined;
step S3, when the roadway is dug between the warning line and the water detection line, observing whether the surrounding rock of the roadway has the wet waterlogging condition, if the wet waterlogging condition exists, stopping tunneling, drilling a water detection hole on the face, and discharging water through the water detection hole; if no wet waterlogging condition exists between the warning line and the water detection line, the roadway continues to be tunneled and constructed;
step S4, when the tunnel is tunneled to a water detection line, drilling a water detection hole on the face, and if water is discharged, discharging water through the water detection hole in time; if the water detection holes do not discharge water, continuing the tunneling construction of the roadway, in the tunneling construction process, descending the elevation of the bottom plate of the roadway for a certain distance to drill the water detection holes on the face, and if water exists, timely discharging water through the water detection holes.
In the geophysical prospecting and drilling cooperative advanced water exploration and drainage construction method, preferably, in step S2, a transient electromagnetic instrument is used for detecting a top plate, a bottom plate and a tunnel face of a roadway, and each face is detected in a plurality of detection directions.
The geophysical prospecting and drilling cooperative advanced water exploration and drainage construction method preferably detects a plurality of detection directions on the tunnel face of the roadway;
preferably, the plurality of detection directions are respectively inclined at ± 45 °, ± 22.5 ° and 0 ° from the horizontal direction.
In the geophysical prospecting and drilling cooperative advanced water exploration and drainage construction method, preferably, the top plate and the bottom plate of the roadway are respectively probed in a plurality of probing directions;
preferably, the included angles between the horizontal direction and the plurality of detection directions for the top plate and the bottom plate are 90 °, 67.5 °, 45 °, 22.5 ° and 0 °, respectively.
In the geophysical prospecting and drilling collaborative advanced water exploration and drainage construction method, preferably, in the step S3, when the tunnel is excavated to the water exploration line, 1-2 water exploration holes are drilled on the face of the tunnel, if the water exploration holes do not discharge water, the tunnel is continuously excavated, and when the elevation of the bottom plate of the tunnel drops for a certain distance in the excavation process, 1-3 water exploration holes are drilled on the face of the tunnel, if the water discharge does not occur, the tunnel is continuously excavated, and if the water exploration holes discharge water, the water is timely drained;
preferably, when the tunnel tunnelling to visit behind the waterline, every 1m that falls of bottom plate elevation in tunnel drills on the face and establishes 2 and visit the water hole, the aperture of visiting the water hole is 65mm, and the hole depth in two water holes of visiting is 20m, 40m respectively, the axis of visiting the water hole is compared in horizontal direction tilt up 3.
The geophysical prospecting and drilling collaborative advanced water detection and drainage construction method preferably includes the step S4 that 1-2 water detection holes are drilled in the face of a tunnel when a tunnel is excavated to a water detection line, 1-3 water detection holes are constructed in the face of the tunnel every time the elevation of a bottom plate of the tunnel is lowered by 1m in the subsequent tunneling process, and water is drained in time if the water detection holes discharge water.
According to the geophysical prospecting and drilling collaborative advanced water detection and drainage construction method, preferably, after the roadway is constructed to the water detection line, the observation hole is drilled at the lowest position of the tunnel face while the water detection hole is drilled on the tunnel face, and water is drained in time if the water detection hole and the observation hole discharge water.
In the geophysical prospecting and drilling cooperative advanced water detection and drainage construction method, preferably, in steps S3 and S4, if the water detection hole does not flow out, the water detection hole which does not flow out is completely blocked by using a blocking material;
preferably, the plugging material is concrete.
In the geophysical prospecting and drilling cooperative advanced water exploration and drainage construction method, preferably, in steps S3 and S4, when the water detection hole is drained, a connecting sleeve is installed in the water detection hole, and a water stop valve is arranged on the connecting sleeve and used for controlling the water quantity during water drainage.
In the geophysical prospecting and drilling collaborative advanced water exploration construction method, preferably, a thin pipe is inserted into a gap between the connecting sleeve and the water exploration hole, and the thin pipe is connected with a slurry pump and used for injecting cement slurry into a gap between the connecting sleeve and the water exploration hole;
preferably, the water-cement ratio of the cement paste ranges from 0.6 to 1.1.
Compared with the closest prior art, the technical scheme provided by the invention has the following excellent effects:
compared with the traditional single method, the method has the advantages of higher construction efficiency, strong operability, reasonable method and lower cost. By using the geophysical prospecting and drilling cooperative advanced water detection and drainage construction method, not only can the safety production be ensured, but also the number of drilled holes can be reduced, and the production cost is saved.
Drawings
FIG. 1 is a schematic view of a geophysical prospecting direction from a left upper to a right upper of a tunnel face according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a survey apparatus for detecting a tunnel face according to an embodiment of the invention;
FIG. 3 is a schematic view of the direction of geophysical prospecting from the top to the bottom of a tunnel face in an embodiment of the present invention;
FIG. 4 is a schematic diagram of a detection direction of a roof of a roadway by geophysical prospecting according to an embodiment of the invention;
FIG. 5 is a schematic flow chart of a geophysical prospecting and drilling cooperative advanced water exploration and drainage construction method in an embodiment of the invention;
FIG. 6 is a schematic view of the installation of the connecting sleeve and the water stop valve in the borehole according to the embodiment of the present invention.
In the figure: 10. a palm surface; 20. an exploration device; 30. a left side of the roadway; 40. right wall of the tunnel; 50. a top plate; 60. a base plate; 1. a rock mass; 2. a water detecting hole; 3. connecting a sleeve; 4. a water stop valve; 5. a thin tube; 6. and (5) slurry pumps.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are for convenience of description of the present invention only and do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected" and "connected" used herein should be interpreted broadly, and may include, for example, a fixed connection or a detachable connection; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
According to the specific embodiment of the invention, as shown in fig. 1-6, the invention provides a water-advancing construction method, and the water-advancing construction method provided by the invention adopts a comprehensive water-advancing means such as cooperative geophysical prospecting and drilling in a water-containing layer for construction, so that the problems of multiple working procedures, long period, difficulty in accurate detection and the like of the existing water-advancing method can be better overcome. The method is mainly suitable for water exploration and drainage construction of tunneling operation surfaces under water bodies, aquifers, unknown karst caves and goafs in metal or nonmetal underground mines.
The geophysical prospecting and drilling cooperative advanced water exploration and drainage construction method has the technical principle that advanced geophysical prospecting is carried out in an aquifer by applying a mining transient electromagnetic instrument to determine a low-resistance abnormal region, drilling precision check verification is carried out by adopting an optimal method, the abnormal range is further accurate, the influence of toxic and harmful gases is eliminated, and water drainage work is carried out. Effectively control and prevent the influence of water damage. The conductivity characteristics of the geophysical prospecting instrument are in a fixed change rule in the original stratum state, and the stratum electrical distribution rule is broken through in the aquifer. When the structural fracture zone exists, the conductivity is poor, and the local resistivity is obviously improved; when a water-rich region is present, the local resistivity drops significantly, which is interpreted as a low-resistance anomaly. If the goaf contains water, it is equivalent to a low-resistivity material because of its good conductivity, and is interpreted as relatively water-carrying. And determining the large-range profile of the aquifer by using the judgment of the low-resistance abnormity. The geophysical prospecting and drilling cooperative advanced water exploration and drainage construction method is used for ensuring timely exploration and drainage according to the principle of reducing working time and shortening water exploration and drainage workload on the premise of ensuring safe operation.
The mine transient electromagnetic prospecting device used in the super water exploration construction comprises a YCS200 mine intrinsic safety type transient electromagnetic instrument, a YCS200 receiving coil and a YCS200 transmitting coil, wherein the YCS200 receiving coil is connected to the YCS200 mine intrinsic safety type transient electromagnetic instrument through a YSC200 receiving coil connecting line, and the YCS200 transmitting coil is connected to the YCS200 mine intrinsic safety type transient electromagnetic instrument through a YSC200 transmitting coil connecting line.
The advanced water exploration construction method comprises the following steps:
step S1, before physical exploration, the roadway is cleaned, and production work is suspended to meet physical exploration conditions.
Specifically, 1, ensuring that the transient electromagnetic method is used for forecasting the construction environment condition in advance:
firstly, before the advance forecast construction, the tunnel face 10 should be detected to perform corresponding cleaning work, so as to ensure that the face 10 meets the construction conditions, for example, accumulated water on the face 10 should be extracted in time, the face 10 is removed from slag in place to meet the placing conditions of the overlapped coils, and the like.
And secondly, during the construction period of advanced forecasting, relevant production work should be suspended in the detection roadway and nearby roadways, so that the detection roadway and nearby roadways are ensured to meet transient electromagnetic detection conditions, such as power failure, backward movement of metal objects of a fully-mechanized excavating machine, a drilling machine and the like by 10m, and the authenticity and the resolution of acquired data are guaranteed.
2. The technical measures of the transient electromagnetic method for advanced prediction are as follows:
firstly, before data acquisition, an instrument is calibrated strictly according to a specification.
Strictly setting parameters of sampling delay, superposition times, emission current and other instruments determined by tests.
And thirdly, in the construction process, the deviation between the line measuring direction and the point distance is reduced as much as possible. Under the influence of terrain, ground feature conditions and the like, the point-line distance and the network density are adjusted in time, and the network density is remeasured in time, so that accidental errors are eliminated to the maximum extent, and reliable and rich geological information is obtained.
Checking the electric leakage condition of the instrument and the lead at any time in the construction process, ensuring insulation, and avoiding interpretation errors caused by distortion of an observation curve.
Fifth, the education and management of quality consciousness of the personnel participating in the project are strengthened; strictly according to ISO: the 9001 and ISO2000 quality management system is constructed by the procedures, and self-checking and mutual inspection are enhanced. For the data not meeting the quality requirement, the reason is found out, and the immediate rework is caused by the subjective factors.
The mine transient electromagnetic prospecting device 20 is of a type of an overlapped loop combined device, a splayed square coil with the side length of 1.5m is used for excitation and reception, the number of turns of an excitation coil (namely a transmitting coil) is 4, and the number of turns of a receiving coil is 40. The supply current is 100A, and the supply pulse width is 5 ms. And each measuring point selects proper superposition times according to the actual signal quality to improve the signal-to-noise ratio and ensure the reliability of the original data.
Step S2, detecting the roadway by using the mine transient electromagnetic prospecting device 20 in the physical prospecting, and before the roadway is tunneled, detecting water-endowing property information in each direction in the roadway by using the mine transient electromagnetic prospecting device 20 to determine a warning line and a water detection line in the tunneling direction of the roadway; the top plate 50, the bottom plate 60 and the face 10 of the roadway are detected by a transient electromagnetic instrument, and each face is detected in a plurality of detection directions.
The water exploration line is a starting line for water exploration by a drilling method. The water detection line is defined by parallelly extrapolating a certain distance along the water accumulation line according to the water pressure of a water flooded area, the tensile strength and stability of a coal (rock) layer, the reliability of data and other factors.
The warning line is the initial line for enhancing the observation of the water condition and vigilance of the threat of the ponding. The warning line is defined by a water detection line and a certain distance of parallel extrapolation; when the excavation working surface approaches the line, the danger of water accumulation should be warned and the water situation change of the excavation working surface should be noticed.
Detecting a plurality of detection directions of a tunnel face 10 of a tunnel, as shown in fig. 1, detecting the tunneling direction of the tunnel face 10 in the transverse direction from a left tunnel upper 30 to a right tunnel upper 40, detecting a plurality of detection directions at each point from 1# -13# in fig. 1, wherein included angles between the plurality of detection directions and the horizontal direction are respectively +/-45 degrees, +/-22.5 degrees and 0 degree; namely, the existing excavation direction of the tunnel face 10 is taken as a reference, and the existing excavation direction is respectively the direction of a top plate 50 with an angle of 45 degrees upwards, the direction of the top plate 50 with an angle of 22.5 degrees upwards, the direction of a bottom plate 60 with a angle of 22.5 degrees downwards horizontally and horizontally (parallel to the excavation direction of the tunnel), and the direction of the bottom plate 60 with an angle of 45 degrees downwards. The construction survey line range is-60 to 60 degrees in the transverse direction, and the scanning section coverage included angle is 120 degrees.
Detecting a plurality of detection directions of a top plate 50 and a bottom plate 60 of the roadway respectively; the angles between the horizontal direction and the plurality of detection directions of the top plate 50 and the bottom plate 60 are respectively 90 °, 67.5 °, 45 °, 22.5 ° and 0 °.
Step S3, when the roadway is dug between the warning line and the water detecting line, and abnormal phenomena such as the roadway surrounding rock becoming moist, waterlogging, even a small amount of water gushing and the like occur, timely shutdown is required; namely observing whether the tunnel surrounding rock has the wet waterlogging condition, if the wet waterlogging condition occurs, stopping tunneling, drilling a water detection hole on the tunnel face 10, and discharging water through the water detection hole; and if the wet waterlogging condition does not occur between the warning line and the water detection line, the roadway continues to be tunneled and constructed.
Specifically, in the embodiment, when a tunnel is excavated to a water detection line, 1-2 water detection holes are drilled in a tunnel face 10, if the water detection holes do not discharge water, the tunnel is continuously excavated, and when the elevation of a bottom plate 60 of the tunnel is reduced by a certain distance in the excavation process, 1-3 water detection holes are drilled in the tunnel face 10, if the water discharge does not occur, the tunnel is continuously excavated, and if the water detection holes discharge water, water is discharged in time; when the tunnel is tunneled to the water detection line, every 1m of 60 elevations of the bottom plate of the tunnel descends, 2 water detection holes are drilled on the tunnel face 10, the hole diameter of each water detection hole is 65mm, the hole depths of the two water detection holes are respectively 20m and 40m, and the axis of each water detection hole is inclined upwards by 3 degrees in the horizontal direction. In this embodiment, the drill model is ZY-150.
Step S4, when the tunnel is tunneled to a water detection line, drilling a water detection hole on the tunnel face 10, and if water is discharged, discharging water through the water detection hole in time; if the water detection hole does not discharge water, continuing the driving construction of the roadway, in each driving construction process of the roadway, lowering the elevation of the bottom plate 60 of the roadway for a certain distance to drill the water detection hole on the tunnel face 10, and if water exists, timely discharging water through the water detection hole.
Step S4 is specifically that when a roadway is excavated to a water detection line, 1-2 water detection holes are drilled on the tunnel face 10, in the subsequent roadway excavation process, 1-3 water detection holes are constructed on the tunnel face 10 when the elevation of the bottom plate 60 of the roadway is lowered by 1m, and when the water detection holes are drilled on the tunnel face 10, observation holes are drilled at the lowest position of the tunnel face 10 and are used for detecting the front water level line. If the water outlet of the water detecting hole is water, water is discharged in time; if the water outlet of the water detecting hole is water, the water is discharged in time.
In the embodiment of the present invention, in steps S3 and S4, if the water detection hole does not flow out, the water detection hole which does not flow out is completely blocked by the blocking material; the plugging material is concrete.
In the embodiment of the present invention, in steps S3 and S4, when the water is discharged from the water detecting hole 2, the connecting sleeve 3 and the water stop valve 4 are installed in the water detecting hole 2, and the water stop valve 4 is used for controlling the amount of water during discharging water. Connection ofThe sleeve 3 is installed in the water exploration hole, and then the sleeve 3 is fixedly connected through grouting. Specifically, as shown in fig. 6, when the water detection hole 2 is drilled in the rock body 1 and water is discharged, the connecting sleeve 3 is inserted into the water detection hole 2, and the length of the connecting sleeve 3 inserted into the water detection hole 2 is not less than 10 m. Connecting sleeve 3's external diameter is less than the diameter of exploring water hole 2, in order to carry out the shutoff to connecting sleeve 3 and the gap of exploring between the water hole 2, insert connecting sleeve 3 and the gap of exploring between the water hole 2 with tubule 5, tubule 5 is connected with slush pump 6, slush pump 6 pours into the thick liquid into connecting sleeve 3 and the gap of exploring between the water hole 2 into as the power supply, treat that connecting sleeve 3 and visit after having a small amount of thick liquids to flow in the gap between the water hole 2, continue to carry out the slip casting, until after the slip casting has certain pressure, stop to pour into the thick liquid into the gap between connecting sleeve 3 and the water hole 2 into, wait for the thick liquid to solidify, make connecting sleeve 3 and the gap of exploring between the water hole 2 can be closed completely. The slurry is cement slurry, and the specific gravity of the cement in the cement slurry is 1.5-1.8 kg/m3(namely the water-cement ratio is between 0.6 and 1.1, and the water-cement ratio refers to the weight ratio of the water consumption to the cement consumption), namely under the condition that the slurry pump 6 can be pressed into the gap between the connecting sleeve 3 and the water detection hole 2 through the thin pipe 5, the cement paste is thickened as much as possible.
In the drainage process of the water detecting hole, a special worker monitors the drainage condition, constantly observes water pressure and water quantity data and makes relevant records. If the water pressure and the water quantity change rapidly, the accident reason needs to be found and timely treated. The site of draining water should carry out real-time supervision to the scene harmful gas condition, or install poisonous and harmful gas detector according to the scene condition, guarantee simultaneously that the point of draining ventilates smoothly, avoid the poisonous and harmful gas gathering to arouse the incident. After water discharging is finished, the actual water discharging amount and the estimated accumulated water amount need to be evaluated and calculated, if the actual water discharging amount and the estimated accumulated water amount do not accord with each other, the reason is found out in time, and accumulated water residue is prevented.
Under any circumstances, the accumulated water in the roadway needs to be discharged in time, and if the accumulated water is discharged in time, danger is formed on field workers and field equipment is damaged. Water is required to be discharged, and the life and property safety of field workers is ensured.
In conclusion, the geophysical prospecting and drilling cooperative advanced water exploration and drainage construction method is used for performing drilling verification in a region with geophysical prospecting low resistance abnormal range in a targeted mode, accurate and effective construction is achieved, the general investigation performance of drilling in the prior art is avoided, and the water exploration and drainage cost is greatly reduced. Compared with the traditional single method, the cooperative system combining the advance geophysical prospecting to determine abnormal areas and the drilling optimization method to accurately detect holes, detect water and discharge is higher in construction efficiency, strong in operability, reasonable in method and lower in cost.
The construction method is that before the roadway is tunneled, a safe operation area is formed at one time within the height difference range of 50-100m by reasonably optimizing the design construction of drilling water detection and drainage. The construction process of the water detecting and discharging technology on the tunneling working face mainly comprises the steps of detecting a water accumulation area by using a transient electromagnetic detection (TEM), using a drilling construction technology during water detecting and discharging, and solving the problems of preparation work required in the early stage of water detecting and discharging work and attention required in the whole construction process. The cooperative water detecting and discharging technology is used, accumulated water in goafs of adjacent working faces is effectively discharged, the water inrush accident of the driving working face is avoided, and important guarantee is provided for safe and efficient construction of the driving working face of the roadway. The application of the method can be effectively prevented and guaranteed in the aspects of safety, environmental protection, occupational health and the like. And the geophysical prospecting and drilling cooperative advanced water detection and drainage construction method can ensure safe production, reduce the number of drilled holes and save production cost.
The above description is only exemplary of the invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the invention is intended to be covered by the appended claims.
Claims (10)
1. A geophysical prospecting and drilling cooperative advanced prospecting water drainage construction method is characterized by comprising the following steps:
step S1, before physical exploration, cleaning the roadway and suspending production work to meet physical exploration conditions;
step S2, the physical exploration is to use a mine transient electromagnetic exploration device to detect a tunnel, before the tunnel is tunneled, the mine transient electromagnetic exploration device is used to detect water bearing information in each direction in the tunnel, and a warning line and a water detection line in the tunneling direction of the tunnel are determined;
step S3, when the roadway is dug between the warning line and the water detection line, observing whether the surrounding rock of the roadway has the wet waterlogging condition, if the wet waterlogging condition exists, stopping tunneling, drilling a water detection hole on the face, and discharging water through the water detection hole; if no wet waterlogging condition exists between the warning line and the water detection line, the roadway continues to be tunneled and constructed;
step S4, when the tunnel is tunneled to a water detection line, drilling a water detection hole on the face, and if water is discharged, discharging water through the water detection hole in time; if the water detection holes do not discharge water, continuing the tunneling construction of the roadway, in the tunneling construction process, descending the elevation of the bottom plate of the roadway for a certain distance to drill the water detection holes on the face, and if water exists, timely discharging water through the water detection holes.
2. The geophysical and drilling cooperative advance water drainage construction method as claimed in claim 1, wherein in the step S2, a transient electromagnetic instrument is used to detect the top plate, the bottom plate and the face of the tunnel, each face being detected in a plurality of detection directions.
3. The geophysical and drilling cooperative advance prospecting water drainage construction method as claimed in claim 2, wherein a plurality of detection directions are detected for a tunnel face of a roadway;
preferably, the plurality of detection directions are respectively inclined at ± 45 °, ± 22.5 ° and 0 ° from the horizontal direction.
4. The geophysical and drilling cooperative advance prospecting water drainage construction method according to claim 2, wherein detection of a plurality of detection directions is performed on a top plate and a bottom plate of a roadway, respectively;
preferably, the included angles between the horizontal direction and the plurality of detection directions for the top plate and the bottom plate are 90 °, 67.5 °, 45 °, 22.5 ° and 0 °, respectively.
5. The geophysical prospecting and drilling cooperative advance prospecting water drainage construction method according to claim 1, wherein in step S3, when a tunnel is excavated to a water detection line, 1-2 water detection holes are drilled on a tunnel face, if the water detection holes do not flow out, the tunnel is continuously excavated, 1-3 water detection holes are drilled on the tunnel face every time the elevation of a bottom plate of the tunnel drops for a certain distance in the excavation process, if the water does not flow out, the tunnel is continuously excavated, and if the water detection holes flow out, water drainage is performed in time;
preferably, when the tunnel tunnelling to visit behind the waterline, every 1m that falls of bottom plate elevation in tunnel drills on the face and establishes 2 and visit the water hole, the aperture of visiting the water hole is 65mm, and the hole depth in two water holes of visiting is 20m, 40m respectively, the axis of visiting the water hole is compared in horizontal direction tilt up 3.
6. The geophysical prospecting and drilling cooperative advance prospecting water drainage construction method according to claim 5, wherein in step S4, when the roadway is excavated to the water detection line, 1-2 water detection holes are drilled in the face of the tunnel, 1-3 water detection holes are constructed in the face of the tunnel every time the elevation of the bottom plate of the roadway drops by 1m in the subsequent excavation of the roadway, and water drainage is performed in time if the water detection holes are drained.
7. The geophysical prospecting and drilling cooperative advance prospecting water drainage construction method according to claim 6, wherein after the roadway is constructed to a water detection line, a water detection hole is drilled in the tunnel face, an observation hole is drilled in the lowest position of the tunnel face, and water drainage is performed in time if the water detection hole and the observation hole discharge water.
8. The geophysical prospecting and drilling cooperative advanced prospecting water discharge construction method as claimed in claim 6, wherein in steps S3 and S4, if the water detection hole is not drained, the water detection hole which is not drained is completely plugged by plugging material;
preferably, the plugging material is concrete.
9. The geophysical prospecting and drilling cooperative advance prospecting water discharge construction method according to claim 6, wherein in steps S3 and S4, when the water detection hole is drained, a connecting sleeve is installed in the water detection hole, and a water stop valve is arranged on the connecting sleeve and used for controlling the water quantity during water discharge.
10. The geophysical prospecting and drilling cooperative advance prospecting water drainage construction method according to claim 9, wherein a thin pipe is inserted into a gap between the connecting sleeve and the water detection hole, and the thin pipe is connected with a mud pump and used for injecting cement slurry into a gap between the connecting sleeve and the water detection hole;
preferably, the water-cement ratio of the cement paste ranges from 0.6 to 1.1.
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