CN112412374B

CN112412374B - Geological exploration system and construction method thereof

Info

Publication number: CN112412374B
Application number: CN202011290685.XA
Authority: CN
Inventors: 罗德刚; 龚德胜
Original assignee: Chongqing 2005 Survey And Design Co ltd
Current assignee: Chongqing 2005 Survey And Design Co ltd
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2022-06-10
Anticipated expiration: 2040-11-18
Also published as: CN112412374A

Abstract

The application relates to a geological exploration system and a construction method thereof, the geological exploration system comprises a power mechanism and a drill rod detachably connected with the output end of the power mechanism, and further comprises a drill bit and a plurality of core barrels, the core barrels coaxially slide to penetrate through the drill rod, the core barrels are coaxially spliced end to end, the drill bit is detachably connected to the bottom end of the drill rod, the core barrel close to the bottom end of the drill rod is connected with the drill bit, and the core barrel close to the top end of the drill rod is connected with the power mechanism. When the core sample is bored to the ground to the sample staff, with many core section of thick bamboo head and the tail concatenation and insert the drilling rod in, connect drilling rod and core section of thick bamboo with the drill bit again, begin to bore core sample work, after the sample is accomplished, pull down power unit and drill bit, can take out the core section of thick bamboo from the drilling rod fast, can be fast with the transportation of the inside core packing of core section of thick bamboo company of taking, this application has the core extraction and deposits convenient effect.

Description

Geological exploration system and construction method thereof

Technical Field

The application relates to the field of geological exploration, in particular to a geological exploration system and a construction method thereof.

Background

Geological exploration, namely investigation and research activities of surveying and detecting geology through various means and methods, determining a proper bearing stratum, determining a foundation type according to the foundation bearing capacity of the bearing stratum and calculating foundation parameters. The method is to find an industrially significant mineral deposit in mineral census, provide mineral reserves and geological data required by mine construction design for finding out the quality and quantity of the mineral and technical conditions of mining and utilization, and carry out investigation and research work on geological conditions such as rocks, strata, structures, mineral products, hydrology, landforms and the like in a certain area. Geological exploration equipment is used for exploring mineral deposits, stratum structures, soil properties and the like, a drilling machine is used for drilling holes into the underground, and soil or rock cores are taken out for analysis and research.

The patent with the publication number of CN205605109U discloses a backpack type sampling drilling machine, which comprises a power machine, a clutch, a handle frame, a gearbox, a water tap, a water pump, a drill rod and a drill bit, wherein the power machine and the clutch are connected and fixed on the handle frame, the gearbox is fixed below the handle frame, an input shaft of the gearbox is connected with the clutch, an output shaft of the gearbox is connected with a connecting end of the water tap by adopting a buckle structure, an output end of the water tap is connected with the drill rod by adopting a screw thread structure, the drill bit is connected with the drill rod by adopting the screw thread structure, and the water pump is connected with an input end of the water tap by a water pipe and a quick connector.

With respect to the related art among the above, there are the following drawbacks: after the sampling staff finish the drilling and sampling, the core in the drill rod needs to be drawn out from the drill rod, the friction force and the resistance between the core in the drill rod and the inner wall of the drill rod are large, and the core is taken out difficultly.

Disclosure of Invention

In order to conveniently and quickly take out a rock core in a drill rod, the geological exploration system and the construction method thereof are provided.

In a first aspect, the present application provides a geological survey system, which employs the following technical solutions:

the utility model provides a geological exploration system, includes power unit and can dismantle the drilling rod of connecting the power unit output, still includes drill bit and a plurality of core section of thick bamboo, the core section of thick bamboo is coaxial to be slided and is worn to establish in the drilling rod, and is a plurality of the coaxial concatenation of core section of thick bamboo head and the tail, the drill bit can be dismantled and connect in the bottom of drilling rod, is close to the core section of thick bamboo and the drill bit of drilling rod bottom are connected, are close to the core section of thick bamboo on drilling rod top is connected with power unit.

Through adopting above-mentioned technical scheme, the sample staff is when boring the core sample to the ground, with many core section of thick bamboo end to end concatenation earlier, insert in the drilling rod, be connected drilling rod and power unit again, and connect drilling rod and core section of thick bamboo with the drill bit, make the drilling rod connect into whole with the core section of thick bamboo, begin to bore core sample work, the back is accomplished in the sample, take out the drilling rod from the ground, power unit and drill bit are pulled down, can take out the core section of thick bamboo from the drilling rod fast, serial number is arranged in proper order to the core section of thick bamboo, tap the core section of thick bamboo again, make two liang of core section of thick bamboos break off, can be with the core section of thick bamboo even take inside core packing transportation, the convenience is deposited in the core extraction.

Optionally, a sleeve is coaxially and fixedly arranged at one end, close to the drill rod, of the drill bit, threads are arranged on the outer wall and the inner wall of the sleeve, the screwing directions of the threads on the inner wall and the outer wall of the sleeve are opposite, an inner thread matched with the sleeve is arranged on the inner wall of the bottom end of the drill rod, the core barrel comprises a connecting barrel close to the drill bit, and an outer thread matched with the sleeve is arranged on the outer wall of the connecting barrel.

Through adopting above-mentioned technical scheme, the sample staff is when the installation drill bit, in the connecting cylinder threaded connection on the drill bit sleeve that is used for connecting the drill bit in the many core section of thick bamboos earlier, align the drilling rod with the sleeve again, and threaded connection, when drilling work goes on, it is rotatory along screwing up the drill bit direction to order about the drilling rod by actuating mechanism, make the drill bit can not drop in drilling work, and through connecting cylinder and the reverse threaded connection of sleeve, make the core section of thick bamboo in with inside core friction in-process, screw up with the drill bit under frictional force reaction power, stability is good.

Optionally, one end of the core barrel is fixedly provided with a plurality of bumps, the bumps are uniformly arranged along the circumferential direction of the core barrel at intervals, and the other end of the core barrel is provided with a groove matched with the bumps.

Through adopting above-mentioned technical scheme, when the concatenation core section of thick bamboo, make a plurality of core sections of thick bamboo end to end concatenation, in two core sections of concatenation department, the lug on a core section of thick bamboo inserts in another core section of thick bamboo upper groove to make two core sections of thick bamboos can not take place relative rotation, connect stably between the core section of thick bamboo, bore the core and sample the in-process stability better.

Optionally, the core barrel includes two unit petals with semi-ring cross-sections, a pair of unit petals are provided with a connecting piece for connecting the two unit petals, the connecting piece is a magnetic sheet, the magnetic sheet is fixedly connected to a contact surface of the unit petal in contact with the other unit petal, and the magnetic sheet is used for adsorbing the other unit petal.

Through adopting above-mentioned technical scheme, after accomplishing ground coring work, break each section core section of thick bamboo, overcome the magnetic force of magnetic sheet with two unit lamella of core section of thick bamboo again and unpack apart, can take out the core fast, use convenient operation.

Optionally, a transition piece is arranged at the edge of one side of the inner wall of the unit valve close to another unit valve, a transition groove matched with the transition piece is formed in the other side of the inner wall of the unit valve far away from the transition piece, the transition piece is attached to the inner wall of the other unit valve and embedded in the transition groove of the other unit valve, and the direction of one end of the transition piece far away from the unit valve is opposite to the rotation direction of the drill bit.

Through adopting above-mentioned technical scheme, set up the transition piece deviating from drill bit direction of rotation on the unit lamella, can effectively reduce in drilling process, the frictional force to unit lamella seam crossing production when the core rubs with the core section of thick bamboo inner wall, further improves core section of thick bamboo connection stability.

Optionally, the drill bit includes mount pad and annular cutter head, the mount pad is connected on the drilling rod, the annular cutter head sets up the one end of keeping away from the drilling rod at the mount pad, the articulated reaming blade that is provided with on the outer wall of mount pad, the articulated shaft of reaming blade is located the one end that the reaming blade is close to annular cutter head, be provided with the holding tank that is used for accomodating the reaming blade on the outer wall of mount pad, be provided with the drive assembly who is used for ordering about the reaming blade and changes out the holding tank in the mount pad.

Through adopting above-mentioned technical scheme, when taking a sample to ground drilling, start drive assembly, order about rotation reaming blade on the drill bit mount pad and roll out the holding tank to increase the diameter of drilling among the drilling process and the interval between the core section of thick bamboo internal diameter, after drilling is accomplished, order about in the reaming blade is lax and accomodate into the holding tank, sample staff can deflect the drilling rod, makes the core junction fracture of drilling rod bottom, and the sample staff of being convenient for takes out the core from drilling.

Optionally, drive assembly includes the ejector pad, the annular tool bit sets up the one end that the drilling rod was kept away from to the mount pad along self circumference straight line slip, the ejector pad rigid coupling is close to the one end of mount pad at annular tool bit, the edge that the reaming blade is close to the lateral wall of mount pad central line and is close to annular tool bit sets up to the inclined plane, the slip hole of intercommunication holding tank is seted up along self axial to the one end that the mount pad is close to annular tool bit, the ejector pad is worn to establish in the slip hole by sliding, the ejector pad can with the inclined plane butt of annular tool bit.

Through adopting above-mentioned technical scheme, push down power unit at the sample staff and begin drilling work time, annular tool bit and ground contact, and under the pressure effect, annular tool bit is connected with the mount pad, and make ejector pad butt reaming blade back inclined plane on the annular tool bit, thereby release the holding tank with the reaming tool bit, with the expansion drilling diameter, after drilling, to lifting power unit, make annular tool bit lapse under the action of gravity, thereby make the reaming blade rotate to the holding tank, can conveniently rotate the drilling rod this moment, with the rupture of core bottom junction, high durability and convenient use.

Optionally, be provided with the elastic component that is used for driving about the expansion end of reaming blade in the holding tank and turns to in the holding tank, the elastic component is the spring, the one end of spring and the expansion end fixed connection of reaming blade, the inner wall fixed connection of the other end and holding tank.

Through adopting above-mentioned technical scheme, when sample staff finishes the sample and mentions power unit, the annular cutter head falls under the action of gravity, and the reaming blade is drawn into the holding tank under the spring action to effectively prevent to pull out at the drilling rod and get the core hole in-process and cause the hindrance, make things convenient for the drilling rod to take out.

In a second aspect, the present application provides a geological exploration construction method, which adopts the following technical scheme:

a geological exploration construction method comprises the following steps:

s1, construction preparation, equipment counting and exploration equipment splicing;

s2, opening a hole for sampling, obliquely drilling a crescent shallow groove by using equipment at a point on the ground, slowly righting the equipment by using the crescent shallow groove as a fulcrum, and vertically drilling the hole downwards;

s3, after the core at the bottom of the drill rod is broken, lifting the device, extracting the core barrel in the drill rod, and separating each section of the core barrel;

and S4, recording the core barrels according to the core pulling sequence, collecting and storing the core barrels, and finishing sampling.

By adopting the technical scheme, in the rock-soil core pulling work, the multiple core barrels are arranged in the drill rod in advance and connected through the drill bit, the drill rod and the drill bit are taken down after the drilling is completed, the core barrels can be rapidly drawn out of the drill rod, the core barrels are respectively broken and stored in sequence, and the core is rapidly taken out and is conveniently stored.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when sampling rock-soil drill cores, sampling workers splice a plurality of core barrels end to end and insert the core barrels into the drill rods, then connect the drill bits with the drill rods and the core barrels, start the core drilling and sampling work, and detach the power mechanism and the drill bits after sampling is finished, so that the core barrels can be quickly drawn out from the drill rods, the core barrels can be quickly packaged and transported with the internal cores, and the cores are convenient to draw out and store;

2. when a sampling worker installs a drill bit, the core cylinder is in threaded connection with a connecting cylinder connected with the drill bit, then the sleeve is in threaded connection with the drill rod, when the drilling work is carried out, the drill rod is driven to rotate along the direction of tightening the drill bit, so that the drill bit is stably installed, and the connecting cylinder is in reverse threaded connection with the sleeve, so that the core cylinder is tightened in the process of friction with the core, and the stability is good;

3. when taking a sample to ground drilling, order about rotation reaming blade on the drill bit mount pad and roll out the holding tank to increase the diameter of drilling among the drilling process and the interval between a core section of thick bamboo internal diameter, after drilling is accomplished, order about in the reaming blade is lax and accomodate into the holding tank, the drilling rod can deflect to the sample staff, makes the core junction fracture of drilling rod bottom, and the sample staff of being convenient for takes out the core from drilling.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

FIG. 2 is a partial cross-sectional structural schematic view of a drill rod according to an embodiment of the present application.

Fig. 3 is a schematic view of the overall structure of one end of the cartridge according to the embodiment of the present application.

Fig. 4 is a schematic view of the entire structure of the other end of the cartridge according to the embodiment of the present application.

FIG. 5 is a schematic view of a portion of a cross-section of a drill bit according to an embodiment of the present application.

Description of reference numerals: 1. a power mechanism; 2. a drill stem; 3. a drill bit; 31. a sleeve; 32. a mounting seat; 33. an annular cutter head; 34. reaming the blade; 35. accommodating grooves; 36. a drive assembly; 361. a push block; 362. a slide hole; 363. a spring; 4. a core barrel; 41. a bump; 42. a groove; 43. a unit flap; 44. a magnetic sheet; 45. a transition piece; 46. a transition groove; 47. a connecting cylinder; 48. an anti-drop sheet.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a geological exploration system. Referring to fig. 1 and 2, the geological exploration system comprises a power mechanism 1, a drill rod 2, a core barrel 4 and a drill bit 3. The power mechanism 1 can adopt a gasoline engine, and the drill rod 2 is fixedly connected with an output shaft of the gasoline engine in a threaded connection mode. The core section of thick bamboo 4 has a plurality ofly, and the leading concatenation in proper order wears to establish in drilling rod 2, in this embodiment, can penetrate into three core sections of thick bamboo 4 in every drilling rod 2. The core barrel 4 close to the gasoline engine is abutted against the output shaft of the gasoline engine, and the core barrel 4 far away from the gasoline engine is fixedly connected with the drill rod 2 through the drill bit 3.

Referring to fig. 2, the drill bit 3 comprises a mounting block 32 for connecting the drill rod 2 to the core barrel 4, and an annular cutting head 33 connected at an end of the mounting block 32 remote from the drill rod 2. The mounting seat 32 is annular, and the size of the inner ring of the mounting seat 32 is not larger than the inner diameter of the core barrel 4. Fixedly connected with sleeve 31 on the mount pad 32 leaves the space between core section of thick bamboo 4 and the drilling rod 2 inner wall, and sleeve 31 cooperation is connected between the core section of thick bamboo 4 and the drilling rod 2 of keeping away from gasoline engine.

Referring to fig. 2, the core barrel 4 far away from the gasoline engine is a connecting barrel 47, threads with opposite thread turning directions are respectively arranged on the inner wall and the outer wall of the sleeve 31, and an internal thread and an external thread matched with the threads on the sleeve 31 are respectively arranged on the inner wall of the drill rod 2 and the outer wall of the connecting barrel 47. When the drill bit 3 drills downward, the output shaft of the gasoline engine is rotated in the same direction as the drill rod 2 is rotated on the mounting seat 32, and in the opposite direction to the direction in which the core barrel 4 is rotated on the mounting seat 32. Thereby realizing that the drill bit 3 is stable and does not fall off in the drilling process of the drill bit 3, and the core barrel 4 is kept connected with the drill bit 3.

Referring to fig. 3 and 4, in order to keep the core barrels 4 in the drill rod 2 stably accommodating the core during the drilling process of the drill bit 3, a splicing structure is formed between every two adjacent core barrels 4. The one end of core section of thick bamboo 4 has the boss along self circumference protrusion, still is fixed on the boss to protrude there is lug 41, and lug 41 is equipped with a plurality ofly along the even interval of the circumference of core section of thick bamboo 4, and lug 41 has eight in this embodiment, and lug 41 also can be four or six. The other end of the core barrel 4 is concavely formed with a ring groove matched with the size of the lug boss, and the bottom wall of the ring groove is concavely formed with a groove 42 with the same position and size as the lug boss 41. When the adjacent core cylinders 4 are spliced, the convex block 41 on one core cylinder 4 is embedded into the concave groove 42 on the other core cylinder 4, so that the relative rotation between the core cylinders 4 is effectively prevented, and the stability of the core cylinder 4 in the drill rod 2 in the drilling process is kept.

Referring to fig. 3 and 4, after drilling is completed, the joints of the core barrels 4 are knocked open, and then the core is transported together with the core barrels 4. In order to quickly take out the core in the core barrel 4, the core barrel 4 is composed of two unit petals 43 with semi-ring cross-sectional shapes, and the two unit petals 43 can be spliced to form a complete cylinder. The splicing positions of the two unit petals 43 are connected into a whole through a connecting piece, in the embodiment, the connecting piece is a magnetic sheet 44, the magnetic sheet 44 is a strong magnet, and the unit petals 43 are all iron pipes. The magnetic sheets 44 are two sheets, and are respectively fixed on the contact surfaces of the two unit petals 43 on one core barrel 4, and when the core barrel 4 is spliced, the magnetic sheet 44 on one unit petal 43 is butted with one side without the magnetic sheet 44 on the other unit petal 43.

Referring to fig. 3 and 4, in order to prevent the core from being pushed from the joint position of the two unit petals 43 to expand the two unit petals 43 outwards during the friction sliding process in the core barrel 4, each unit petal 43 is also integrally formed with a transition piece 45 extending towards the rotation direction of the drill rod 2 at the joint position. The end of the transition piece 45 remote from the unit lobe 43 is reduced in thickness, and the inner wall of the transition piece 45 is smooth and coplanar with the inner wall of the unit lobe 43. The other side of the inner wall of the unit valve 43, which is far away from the transition piece 45, is provided with a transition groove 46 matched with the shape of the transition piece 45, and when the two unit valves 43 are spliced with each other, the transition piece 45 on the unit valve 43 is smoothly clamped in the transition groove 46 on the other unit valve 43.

Referring to fig. 2, in order to improve the stability of the core barrel 4 within the drill rod 2, support ribs are welded to the inner wall of the drill rod 2. The support ribs are arranged along the circumferential direction of the drill rod 2 at intervals, and when the core barrel 4 is inserted into the drill rod 2, the support ribs are abutted against the outer wall of the core barrel 4, so that the core barrel 4 can be effectively prevented from being propped open by a core during the drilling process.

Referring to fig. 2 and 5, after drilling, the core is easily connected to the bottom wall of the borehole, and the sampling worker is required to rock the drill rod 2 in order to break the core from the bottom of the borehole. The side wall of the mounting seat 32 on the drill bit 3 is further provided with a reaming blade 34, the bottom of the reaming blade 34 is hinged with the mounting seat 32, and the side wall of the mounting seat 32 is further provided with a receiving groove 35 capable of receiving the reaming blade 34. By rotating the reaming blades 34 out during drilling, the borehole diameter is increased and after drilling is completed, the sampling staff can shake the drill rod 2 a little to break the connection at the bottom of the core.

Referring to fig. 5, the movable end of the reaming blade 34 is connected to an anti-slip piece 48 at a position close to the mounting seat 32, and the anti-slip piece 48 is rotatably disposed in the receiving groove 35 by taking the rotation axis of the reaming blade 34 as a center of circle, so as to effectively prevent the reaming blade 34 from completely rotating out of the receiving groove 35. The accommodating groove 35 is provided with an elastic member for driving the movable end of the reaming blade 34 to rotate into the accommodating groove 35, in this embodiment, the elastic member is a spring 363, one end of the spring 363 is fixedly connected with the movable end of the reaming blade 34, and the other end of the spring 363 is fixedly connected with the inner wall of the accommodating groove 35.

Referring to fig. 5, in order to urge reamer blade 34 to rotate out of receiving slot 35 when the sampling operator depresses power mechanism 1 to begin drilling, a drive assembly 36 is provided within mounting block 32 for urging reamer blade 34 to rotate out of receiving slot 35. In this embodiment, the driving assembly 36 is a push block 361, one end of the annular cutting head 33 close to the mounting seat 32 is fixedly connected with a sliding rod parallel to the axis of the annular cutting head 33, one end of the mounting seat 32 close to the annular cutting head 33 is provided with a sliding groove along the length direction, and the sliding rod is linearly slidably mounted in the sliding groove. The side of the mounting seat 32 with the sliding groove is further provided with a sliding hole 362 communicated with the accommodating groove 35 along the axial direction, and the push block 361 is welded and fixed on the end face of the annular cutter head 33 with the sliding rod and corresponds to the sliding hole 362.

Referring to fig. 5, the edge of the ring blade near the side wall of the center line of the mounting seat 32 and near the ring blade 33 is provided with an inclined surface, when the sampling operator presses down the power mechanism 1, the ring blade 33 contacts the ground and is forced to approach the mounting seat 32, so that the push block 361 is inserted into the sliding hole 362 and abuts against the inclined surface on the back of the chambering blade 34, thereby pushing the chambering blade 34 to rotate out of the receiving groove 35 against the elastic force of the spring 363.

The implementation principle of the geological exploration system in the embodiment of the application is as follows: when sampling the rock-soil drill core, a sampling worker firstly splices the core cylinders 4 end to end and inserts the core cylinders into the drill rod 2. Then the drill rod 2 is connected with the gasoline engine through threads, and the drill bit 3 is respectively connected with the drill rod 2 and the core barrel 4, so that the drill rod 2 and the core barrel 4 are connected into a whole, and the core drilling and sampling work is started. After sampling is finished, the drill rod 2 is pulled out of the rock soil, the gasoline engine and the drill bit 3 are disassembled, and the core barrel 4 can be quickly pulled out of the drill rod 2. Then, the core barrels 4 are sequenced and numbered, and the core barrels 4 are tapped again, so that every two core barrels 4 are disconnected, the core barrels 4 with the inner cores can be packaged and transported, and the cores can be extracted and stored conveniently.

The embodiment of the application also discloses a geological exploration construction method. Referring to fig. 1 and 2, the method comprises the following steps:

s1, construction preparation, equipment counting, screwing the gasoline engine and the drill rod 2 in a threaded connection mode, and then sequentially inserting the core barrels 4 into the drill rod 2 to enable the core barrels 4 to be spliced end to end. And (3) placing the connecting cylinder 47 in the core cylinder 4 at the tail end of the drill rod 2, and then using the drill bit 3 to be sequentially in threaded connection with the connecting cylinder 47 and the drill rod 2 to complete equipment splicing.

And S2, opening a hole for sampling, obliquely drilling a crescent shallow groove by using equipment at a point on the ground, slowly righting the equipment by using the crescent shallow groove as a fulcrum, and continuously and vertically drilling downwards.

And S3, after the core at the bottom of the drill rod 2 is broken, lifting the equipment, dismantling the drill bit 3 and extracting the core barrel 4 in the drill rod 2. The joint of the core cylinders 4 is tapped to separate each section of the core cylinder 4.

And S4, recording the core barrel 4 according to the core pulling sequence, collecting and storing the core barrel 4, and finishing sampling.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a geological exploration system, includes power unit (1) and can dismantle drilling rod (2) of connecting power unit (1) output, its characterized in that: the drill bit is characterized by further comprising a drill bit (3) and a plurality of core barrels (4), the core barrels (4) are coaxially arranged in the drill rod (2) in a sliding mode in a penetrating mode, the core barrels (4) are coaxially spliced end to end, the drill bit (3) is detachably connected to the bottom end of the drill rod (2), the core barrel (4) close to the bottom end of the drill rod (2) is connected with the drill bit (3), and the core barrel (4) close to the top end of the drill rod (2) is connected with the power mechanism (1); the drill bit (3) are close to the coaxial sleeve (31) that has set firmly of one end of drilling rod (2), all be provided with the screw thread on the outer wall of sleeve (31) and the inner wall, the screw thread revolves to opposite on the inside and outside wall of sleeve (31), be provided with the internal thread with sleeve (31) adaptation on the inner wall of drilling rod (2) bottom, core section of thick bamboo (4) are including connecting cylinder (47) that are close to drill bit (3), be provided with the external screw thread with sleeve (31) adaptation on the outer wall of connecting cylinder (47).

2. A geological survey system as claimed in claim 1, wherein: the core barrel is characterized in that one end of the core barrel (4) is fixedly provided with a plurality of convex blocks (41), the convex blocks (41) are uniformly arranged at intervals along the circumferential direction of the core barrel (4), and the other end of the core barrel (4) is provided with a groove (42) matched with the convex blocks (41).

3. A geological survey system as claimed in claim 2, wherein: the core barrel (4) comprises two unit petals (43) with semi-ring-shaped cross sections, a pair of unit petals (43) are provided with connecting pieces for connecting the two unit petals (43), the connecting pieces are magnetic sheets (44), the magnetic sheets (44) are fixedly connected on a contact surface of the unit petals (43) and the other unit petal (43), and the magnetic sheets (44) are used for adsorbing the other unit petal (43).

4. A geological survey system as claimed in claim 3, wherein: one side edge that is close to another unit lamella (43) on unit lamella (43) inner wall is provided with transition piece (45), another side of keeping away from transition piece (45) on unit lamella (43) inner wall is seted up and is passed transition groove (46) with transition piece (45) adaptation, the inner wall of another unit lamella (43) of transition piece (45) laminating is inlayed and is established in the transition groove (46) of another unit lamella (43), transition piece (45) keep away from unit lamella (43) one end orientation and drill bit (3) direction of rotation opposite.

5. A geological survey system as claimed in claim 1, wherein: drill bit (3) are including mount pad (32) and annular tool bit (33), mount pad (32) are connected on drilling rod (2), annular tool bit (33) set up the one end of keeping away from drilling rod (2) in mount pad (32), the articulated reaming blade (34) that is provided with on the outer wall of mount pad (32), the articulated shaft of reaming blade (34) is located the one end that reaming blade (34) are close to annular tool bit (33), be provided with holding tank (35) that are used for accomodating reaming blade (34) on the outer wall of mount pad (32), be provided with in mount pad (32) and be used for ordering about drive assembly (36) that reaming blade (34) rolled out holding tank (35).

6. A geological survey system as claimed in claim 5, wherein: drive assembly (36) include ejector pad (361), annular tool bit (33) set up the one end that drilling rod (2) were kept away from in mount pad (32) along self circumference straight line slip, ejector pad (361) rigid coupling is close to the one end of mount pad (32) in annular tool bit (33), reaming blade (34) are close to the lateral wall of mount pad (32) central line and are close to the edge of annular tool bit (33) and set up to the inclined plane, sliding hole (362) of intercommunication holding tank (35) are seted up along self axial to the one end that mount pad (32) are close to annular tool bit (33), ejector pad (361) slide and wear to establish in sliding hole (362), ejector pad (361) can with the inclined plane butt of annular tool bit (33).

7. A geological survey system as claimed in claim 5, wherein: the movable end that is used for driving reaming blade (34) in holding tank (35) turns to the elastic component in holding tank (35) in being provided with in holding tank (35), the elastic component is spring (363), the one end of spring (363) and the movable end fixed connection of reaming blade (34), the inner wall fixed connection of the other end and holding tank (35).

8. A geological exploration construction method comprising the geological exploration system as claimed in any one of claims 1 to 7, characterized by comprising the following steps:

s3, after the core at the bottom of the drill rod (2) is broken, lifting the device, extracting the core barrel (4) in the drill rod (2), and separating each section of the core barrel (4);

and S4, recording the core barrel (4) according to the core pulling sequence, collecting and storing the core barrel (4), and finishing sampling.