A drilling device in coal mine construction

Abstract

The present application provides a drilling device for coal mine construction. The drilling device for coal mine construction includes a drilling equipment and a blowout prevention device. The drilling equipment includes a drilling machine body and multiple drill pipes. A directional drilling frame group is further assembled on the initial drill pipe. The blowout prevention device includes a steel casing and a positioning plate. A working hole position communicating with the inside of the steel casing is formed on the positioning plate, and a hydraulic chamber is cross-shaped inside the positioning plate. A sector plate that can extend into the working hole position is slidably connected to the inside of each hydraulic chamber. An arc-shaped cavity adapted to the drill pipe is formed at the end of each sector plate, and a plurality of elastic balls are rotatably connected to the inside of the arc-shaped cavity. In the present application, the directional drilling frame group provides a drilling guiding and deviation prevention effect to accurately detect the position of the aquifer. The sector plate assists in providing the accuracy of drilling and achieving the purpose of quickly plugging and stopping water to avoid accidents.

Description

Technical Field

[0001] The present application relates to the technical field of coal mine drilling, and in particular to a drilling device used in coal mine construction. Background Art

[0002] Safety is always the top priority during coal mine construction. Among them, water damage is one of the major threats faced by coal mining. Due to the complex stratum structure of coal mines and the widespread distribution of aquifers, during the construction process, such as when digging in underground tunnels, if water damage cannot be effectively prevented, it is very likely to cause serious accidents such as flooding of wells and working faces, which will not only lead to the stagnation of coal mine production, but also pose a huge threat to the lives and safety of miners, and cause huge economic losses.

[0003] When excavating in underground tunnels, advance water exploration and drainage is a key process in coal mine construction. Through advance water exploration and drainage, the hydrogeological conditions in front of the construction area can be understood in advance, and whether there are hidden dangers of water damage can be predicted so that corresponding measures can be taken. In some mines that are severely affected by water damage, it is not enough to just conduct water exploration and drainage, and grouting transformation of the aquifer is also required. Grouting transformation of the aquifer can effectively block the water-conducting channels such as cracks and pores in the aquifer, reduce the permeability of the aquifer, and thus reduce the possibility of water damage.

[0004] Whether it is to explore and release water or to inject grout to transform aquifers, a large number of boreholes need to be constructed to expose the aquifers. During the drilling process, in order to accurately explore the aquifers, the drilling accuracy of the boreholes must be ensured. After the initial positioning of the drilling angle, the drill rod is continuously lengthened in the later stage, causing the drill rod to be twisted during the drilling process, or the drill bit encounters a hard layer and causes drilling deviation. As the drilling distance continues to increase, the positioning of the explored aquifer is not accurate.

[0005] Moreover, once the borehole exposes the aquifer and the water output is large, if the water spraying cannot be effectively controlled in time, it is easy to cause an accident. Therefore, it is particularly important to install a blowout preventer at the orifice. The traditional borehole blowout preventer usually has a relatively simple structure. It mainly sets a leather ring on the outside of the drill rod, which has a certain elasticity and sealing. When the borehole is normally constructed and the water output is small, the drill rod can rotate smoothly in the leather ring without causing obvious impact on the construction. However, when the water output of the borehole is large and exceeds the normal control range, it is necessary to activate the blowout preventer function of the blowout preventer. At this time, the worker needs to operate multiple bolts on the outside of the leather ring. By tightening these bolts, the bolts will gradually apply pressure to the leather ring. Because the leather ring is elastic, the leather ring will gradually shrink and hold the drill rod under the extrusion of the bolts. In this way, the water in the borehole can be reduced to a certain extent from spraying out from the middle of the gate valve and the drill rod. In this way, the purpose of controlling the water volume is attempted to prevent a large amount of water from gushing out of the borehole and causing accidents.

[0006] The operation process of traditional blowout preventers is relatively cumbersome when dealing with large amounts of water coming out of holes. Workers are required to tighten multiple bolts one by one, which takes a long time. In coal mine construction, especially in emergency situations with large amounts of water coming out of boreholes, time is life. Every extra second of delay may dramatically increase the risk of water disasters. For example, in some mines with complex geological conditions and high water pressure in the aquifer, once the borehole penetrates the aquifer, water may gush out in large quantities in an instant. At this time, if the blowout preventer cannot be started quickly and the water volume cannot be effectively controlled, the water may quickly flood the working face or even spread to the entire mine tunnel. The process of tightening multiple bolts may delay the best control time, causing accidents that could have been avoided to eventually occur.

[0007] Since it takes a certain amount of time to tighten the bolts, the water output from the borehole cannot be effectively and timely contained during this period of time. Even if all the bolts are tightened and the leather ring holds the drill rod tightly, a large amount of water has already flowed out during this process, which may have caused serious damage to the construction environment. Moreover, as the water continues to flow out, the ground in the construction area may become slippery, which will not only affect the normal operation of the workers, but may also cause workers to slip and get injured. At the same time, a large amount of water may also wash away some temporary support facilities, further exacerbating the safety hazards in the construction area.

[0008] Because the water cannot be quickly controlled, the entire construction area is in a dangerous state. On the one hand, the large outflow of water may cause the abnormal escape of harmful gases such as gas, increasing the risk of secondary disasters such as gas explosions. On the other hand, if the water is too strong, it may destroy the equipment around the borehole, such as drilling rigs, etc. These equipment may be damaged by the impact of the water flow and cause harm to the surrounding personnel. In addition, long-term water outflow may also affect the stability of the surrounding rock of the mine tunnel, causing accidents such as tunnel collapse. Summary of the invention

[0009] The present application provides a drilling device for coal mine construction, which has a good directional drilling effect, can accurately and reliably detect the location of the aquifer, and avoids deviation; the blowout prevention device provided can ensure auxiliary positioning drilling while having an efficient and convenient blocking effect to avoid accidents.

[0010] This application provides a drilling device for coal mine construction, including a drilling equipment for drilling and exploring the aquifer in the roadway, and a blowout preventer assembled at the orifice of the drill hole; the drilling equipment includes: a drilling machine body, multiple drill pipes assembled on the drilling machine body, and a drill bit connected to the initial drill pipe; an installation sleeve is sleeved on the initial drill pipe, a water pressure sensor is assembled inside the installation sleeve, and a wireless signal transmitter for transmitting the water pressure information of the aquifer detected by the water pressure sensor to the drilling machine body; a directional drilling frame group is also assembled on the initial drill pipe; the directional drilling frame group includes: a first ring plate and a second ring plate; a plurality of folding rod groups are connected between the first ring plate and the second ring plate, the first ring plate is rotatably connected to the initial drill pipe, and the second ring plate is slidably and rotatably connected to the initial drill pipe; a friction wheel group in contact with the hole wall of the drill hole is symmetrically assembled on one side of the second ring plate facing away from the first ring plate; when the friction wheel group moves in the first direction, the friction wheel group has a stop friction with the hole wall of the drill hole, and the folding rod group is in an unfolded state; when the friction wheel group moves in the second direction, the friction wheel group has a rolling contact with the hole wall of the drill hole, and the folding rod group is in a folded state; the blowout preventer includes: a steel casing inserted into the drill hole, and a positioning plate connected to the exposed end of the steel casing; a working hole position communicating with the inside of the steel casing is opened on the positioning plate, and a hydraulic chamber is cross-crossed inside the positioning plate, and a sector plate that can extend into the working hole position is slidably connected to the inside of each hydraulic chamber; an arc-shaped cavity adapted to the drill pipe is opened at the end of each sector plate, and a plurality of elastic balls are rotatably connected to the inside of the arc-shaped cavity; among them, any two relatively opposed hydraulic chambers are connected to the same oil pipeline, and the two oil pipelines are respectively connected to the hydraulic system of the drilling machine body; when the drilling machine body drives the drill pipe to rotate and advance, the hydraulic system pumps oil into a corresponding oil pipeline, and the corresponding two sector plates approach and press against each other to position the drill pipe, and a plurality of elastic balls have a rolling contact with the outer wall of the drill pipe; when the pressure information received by the drilling machine body from the water pressure sensor exceeds the set threshold, the hydraulic system pumps oil into the two oil pipelines, the arc-shaped cavities of the four sector plates surround the drill pipe, and a plurality of elastic balls contract into the corresponding arc-shaped cavities, and the four sector plates seal the working hole position.

[0011] In this application, after determining the drilling angle through the drilling machine body, initial drilling is carried out and then the blowout preventer is installed and withdrawn; subsequently, the drill pipe is continuously lengthened to explore the waterproof layer. As the drill pipe goes deeper, the directional drilling rig group provides a stable drilling angle guarantee. During the rotation of the drill pipe, a rotational connection relationship is formed with the first ring plate and the second ring plate. The friction wheel group forms a braking friction during the process of advancing along the drill hole. The distance between the first ring plate and the second ring plate is lengthened to ensure a high anti-deviation property. At the same time, when drilling a relatively deep drill hole, the two fan-shaped plates approach each other, making the drill pipe located at the center of the steel casing for drilling to avoid deflection and distortion. After exploring to the aquifer, the water pressure sensor receives the pressure information, the first ring plate and the second ring plate form a preliminary water blockage, and the hydraulic system pumps oil into the four hydraulic chambers to quickly seal the working hole position, achieving quick water stoppage and avoiding accidents. The overall drilling process is precise, and the water stoppage effect is efficient and convenient.

[0012] In a specific feasible implementation scheme, both the first ring plate and the second ring plate are perforated plates with water-permeable holes, enabling them to have water-permeable properties, not affecting the drilling process, and realizing the drainage function for the seepage water during the drilling process.

[0013] In a specific feasible implementation scheme, the first ring plate is fixedly sleeved on the initial section of the drill pipe through a double-row roller bearing to achieve a stable rotational connection relationship.

[0014] In a specific feasible implementation scheme, an installation through hole is provided on the second ring plate, and a plurality of universal balls are circumferentially arranged on the inner wall of the installation through hole to achieve a slidable and rotatable connection on the drill pipe.

[0015] In a specific feasible implementation scheme, the folding rod group includes: a first connecting rod rotatably connected to the first ring plate and a second connecting rod rotatably connected to the second ring plate; wherein, one ends of the first connecting rod and the second connecting rod facing each other are connected through a rotating shaft, which can adapt to increase the drilling guiding distance and prevent drilling deviation.

[0016] In a specific feasible implementation scheme, a plurality of adaptive telescopic rods are connected between the first ring plate and the second ring plate, making the connection performance more stable and reliable.

[0017] In a specific feasible implementation scheme, the friction wheel groups are all connected to the second ring plate through hinge rods, and a plurality of springs connecting the hinge rods are arranged on the second ring plate, which has strong elastic telescopic performance and makes the contact between the friction wheel groups and the hole wall of the drill hole more comprehensive.

[0018] In a specific feasible implementation scheme, the friction wheel group is a wheel group with a ratchet structure to achieve one-way rotation and facilitate the withdrawal from the drill hole.

[0019] In a specific feasible implementation, a plurality of anchoring holes are provided on the positioning plate. Positioning is achieved through the anchoring holes, making installation and positioning more convenient.

[0020] In a specific feasible implementation, the two oil pipelines are respectively: a first pipeline connecting two vertically opposite hydraulic chambers, and a second pipeline connecting two horizontally opposite hydraulic chambers; wherein, a first quick-connect valve connected to the hydraulic system is connected to the first pipeline, and a second quick-connect valve connected to the hydraulic system is connected to the second pipeline. It aims to assist in positioning and quickly and conveniently block the working hole positions to avoid accidents. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the working state of the drilling device in coal mine construction provided by an embodiment of the present application;

[0022] Figure 2 It is a schematic diagram of the structure of the installation sleeve provided by an embodiment of the present application;

[0023] Figure 3 It is a schematic diagram of the first state of the directional drilling rig group provided by an embodiment of the present application;

[0024] Figure 4 It is a schematic diagram of the second state of the directional drilling rig group provided by an embodiment of the present application;

[0025] Figure 5 It is a schematic diagram of the structure of the second ring plate provided by an embodiment of the present application;

[0026] Figure 6 It is a schematic diagram of the structure of the blowout preventer provided by an embodiment of the present application;

[0027] Figure 7 It is a schematic diagram of the first embodiment of the blowout preventer provided by the present application;

[0028] Figure 8 It is a schematic diagram of the second embodiment of the blowout preventer provided by the present application;

[0029] Figure 9 It is a schematic diagram of the third embodiment of the blowout preventer provided by the present application;

[0030] Figure 10 It is a schematic diagram of the structure of the sector plate provided by an embodiment of the present application.

[0031] Reference Numerals in the Drawings:

[0032] Tunnel - 100;

[0033] Drilling Machine Body - 200, Hydraulic System - 210;

[0034] Blowout preventer - 300, positioning plate - 310, anchoring hole - 311, working hole position - 312, first quick - connect valve - 313, first pipeline - 3131, second quick - connect valve - 314, second pipeline - 3141, hydraulic chamber - 315, sector plate - 316, sliding plate - 3161, rubber layer - 3162, arc - shaped cavity - 3163, elastic ball - 3164, pressing spring - 3165, steel casing - 320;

[0035] Drilling hole - 400;

[0036] Drill pipe - 500;

[0037] Initial drill pipe - 600, installation sleeve - 610, drill bit - 620, water pressure sensor - 630, wireless signal transmitter - 640, directional drilling rig group - 650, first ring plate 651, double - row roller bearing - 6511, second ring plate - 652, universal ball - 6521, water - permeable hole - 6522, folding rod group - 653, adaptive telescopic rod - 654, articulated rod - 655, friction wheel group - 656, spring - 657. Detailed implementation manners

[0038] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings.

[0039] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in one or more embodiments of this specification should be the ordinary meanings understood by those with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in one or more embodiments of this specification do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. "Connection" or "connection" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to represent relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0040] To facilitate the understanding of the drilling device provided in the embodiments of the present application during coal mine construction, first, its application scenario will be described. This drilling device during coal mine construction is mainly used in the technical field of coal exploration holes. Whether it is water exploration and drainage or grouting to transform the aquifer, a large number of drill holes need to be constructed to expose the aquifer. During the drill hole construction process, in order to accurately explore the aquifer, it is necessary to ensure the drilling accuracy of the drill hole. After the initial positioning of the drilling angle, due to the continuous lengthening of the drill pipe in the later stage, the drill pipe generates deflection and distortion during the drilling process, or the drill bit encounters a hard layer and causes drilling deviation. As the drilling distance increases continuously, the positioning of the explored aquifer becomes inaccurate. Moreover, once the drill hole exposes the aquifer and the water output is large, if the water spray cannot be effectively controlled in a timely manner, accidents are likely to occur. Therefore, it is particularly important to install a blowout preventer at the hole opening. The traditional blowout preventer at the drill hole opening usually has a relatively simple structure. It mainly sets a leather ring outside the drill pipe, and this leather ring has certain elasticity and sealing performance. When the drill hole is under normal construction and the water output is small, the drill pipe can rotate smoothly within the leather ring without significantly affecting the construction. However, when the water output of the drill hole is large and exceeds the normal control range, it is necessary to activate the blowout prevention function of the blowout preventer. At this time, the worker needs to operate multiple bolts arranged outside the leather ring. By tightening these bolts, the bolts will gradually apply pressure to the leather ring. Due to the elasticity of the leather ring, under the extrusion of the bolts, the leather ring will gradually shrink and tightly hold the drill pipe. In this way, it can reduce the water in the drill hole from spraying out between the gate valve and the drill pipe to a certain extent. By this means, an attempt is made to achieve the purpose of controlling the water volume and prevent a large amount of water from gushing out of the drill hole and causing accidents. When the traditional blowout preventer is dealing with a large water output from the hole, its operation process is relatively cumbersome. Workers need to tighten multiple bolts one by one, and this process takes a relatively long time. In coal mine construction, especially in the emergency situation where the water output of the drill hole is large, time is of the essence. Every additional second of delay may sharply increase the risk of water disaster accidents. If the blowout preventer cannot be quickly activated and effectively control the water volume, the water may quickly flood the working face and even spread to the entire mine roadway. And the process of tightening multiple bolts may delay the best control opportunity, resulting in the occurrence of accidents that could have been avoided. Because the water cannot be quickly controlled, the entire construction area is in a dangerous state. On the one hand, the large amount of water gushing out may cause abnormal escape of harmful gases such as gas, increasing the risk of secondary disasters such as gas explosion. On the other hand, if the water flow is too fierce, it may wash away the equipment around the drill hole, such as the drilling rig, and these equipment may be damaged under the impact of the water flow and cause harm to the surrounding personnel. In addition, the long-term water flow gushing out may also affect the stability of the surrounding rock of the mine roadway, triggering accidents such as roadway collapse. In view of this, the drilling device during coal mine construction in the present application has a good directional drilling effect, accurately and reliably explores the position of the aquifer, and avoids deviation; the provided blowout preventer has an efficient and convenient plugging effect while ensuring auxiliary positioning drilling, and avoids accidents.

[0041] refer to Figure 1 The drilling device in coal mine construction provided in the embodiment of the present application includes: a drilling device for drilling holes in the tunnel 100 to explore the aquifer; the drilling device includes: a drilling machine body 200, a multi-section drill rod 500 mounted on the drilling machine body 200, and a drill bit 620 connected to the primary drill rod 600; the drilling machine body 200 in the present application adopts a crawler drilling machine, which can be applied to different coal mine tunnels 100, and the distribution of the aquifer is explored by drilling holes 400, so as to provide preventive measures for the subsequent tunnel 100 excavation. The drilling machine body 200 achieves the purpose of exposing the aquifer by adding a multi-section drill rod 500. The drill bit 620 is mounted on the primary drill rod 600, and the primary drill rod 600 in the present application is equipped with a sensor component for exploring the aquifer pressure, providing data reference for subsequent treatment, and ensuring a high treatment and prevention effect.

[0042] Combination Figure 2 As shown in the figure, the primary drill pipe 600 is provided with an installation sleeve 610, and the installation sleeve 610 is provided with a water pressure sensor 630 and a wireless signal transmitter 640 for transmitting the water pressure information of the aquifer detected by the water pressure sensor 630 to the drilling machine body 200. Through wireless signal transmission, when the drill bit 620 drills into the aquifer, as the installation sleeve 610 goes deeper, the water pressure sensor 630 detects the pressure of the aquifer, providing reference data for subsequent treatment and prevention. At the same time, the operator on the drilling machine body 200 timely adjusts the orifice of the borehole 400 according to the received water pressure data to avoid water damage. The aquifer is widely distributed and irregular. With the continuous in-depth exploration, the drill pipe 500 is continuously lengthened. Due to the geological reasons inside the borehole 400 or the twisting change of the drill pipe 500 in a long state, the drilling accuracy is poor and it does not have good guiding performance. To this end, the initial section drill rod 600 in the present application is also equipped with a directional drilling frame assembly 650; the directional drilling frame assembly 650 is used to support and guide the inner wall of the borehole 400 during the continuous drilling process of the drill bit 620, and to achieve more precise guiding operations based on the initially set drilling angle, thereby ensuring that the drilling angle is within a reasonable deviation range, thereby accurately locating the position of the aquifer and providing reliable reference data for subsequent management and prevention.

[0043] Combination Figure 3 and Figure 4As shown in the figure, the directional drilling rig group 650 includes: a first ring plate 651 and a second ring plate 652; both the first ring plate 651 and the second ring plate 652 are perforated plates with water-permeable holes 6522. This gives them water-permeable properties, enabling drainage of seepage water during the drilling process without affecting the drilling process. A plurality of folding rod groups 653 are connected between the first ring plate 651 and the second ring plate 652; the folding rod group 653 includes: a first connecting rod rotatably connected to the first ring plate 651 and a second connecting rod rotatably connected to the second ring plate 652; wherein, one end of the first connecting rod and the second connecting rod facing each other is connected by a rotating shaft. This can adapt to an increase in the drilling guiding distance and prevent drilling deviation. Moreover, a plurality of adaptive telescopic rods 654 are connected between the first ring plate 651 and the second ring plate 652. The connection performance is more stable and reliable. In this application, the folding rod group 653 and the adaptive telescopic rods 654 ensure the connection stability between the first ring plate 651 and the second ring plate 652. At the same time, when the distance between the first ring plate 651 and the second ring plate 652 is adjusted, the characteristics of stretching, folding, and extending and contracting are correspondingly realized. Thus, in different working scenarios, the guiding positioning distance can be adaptively adjusted, and a buffer adjustment is provided when the drill pipe 500 exits the drill hole 400, and the overall guiding performance is stable and reliable.

[0044] To better achieve guiding stability, the first ring plate 651 and the second ring plate 652 do not rotate in the drill hole 400. During the process of the drill pipe 500 advancing deeply, the first ring plate 651 and the second ring plate 652 are driven to rub against the hole wall of the drill hole 400 at a set angle for guiding. Specifically, the first ring plate 651 is rotatably connected to the initial section drill pipe 600, and the first ring plate 651 is fixedly sleeved on the initial section drill pipe 600 through a double-row roller bearing 6511. A stable rotational connection relationship is achieved. The second ring plate 652 is slidably and rotatably connected to the initial section drill pipe 600; combined with Figure 5 As shown in the figure, an installation through-hole is provided on the second ring plate 652, and a plurality of universal ball bearings 6521 are circumferentially arranged on the inner wall of the installation through-hole. This enables it to be slidably and rotatably connected to the drill pipe 500. It can be seen that the initial section drill pipe 600 is fixedly connected to the double-row roller bearing 6511 through a key. During the process of the drill pipe 500 rotating and advancing, the first ring plate 651 does not follow the rotation. The plurality of universal ball bearings 6521 provided on the inner wall of the installation through-hole are in rolling contact with the initial section drill pipe 600. Thus, on the premise of not affecting the distance adjustment between the first ring plate 651 and the second ring plate 652, a stable rolling contact with the initial section drill pipe 600 is ensured, reducing wear.

[0045] Meanwhile, in order to better target the drilling 400 operations under different conditions, a friction wheel set 656 that contacts the hole wall of the drilling 400 is symmetrically assembled on one side of the second ring plate 652 facing away from the first ring plate 651; the friction wheel sets 656 are all connected to the second ring plate 652 through hinge rods 655, and a plurality of springs 657 for connecting the hinge rods 655 are arranged on the second ring plate 652. It has strong elastic telescopic performance, enabling the friction wheel sets 656 to contact the hole wall of the drilling 400 more comprehensively. The friction wheel set 656 is a wheel set with a ratchet structure. It realizes one-way rotation, facilitating the withdrawal from the drilling 400. When the friction wheel set 656 moves in the first direction, the friction wheel set 656 has a stopping friction with the hole wall of the drilling 400, and the folding rod set 653 is in an unfolded state; when the friction wheel set 656 moves in the second direction, the friction wheel set 656 has a rolling contact with the hole wall of the drilling 400, and the folding rod set 653 is in a folded state. Thus, when the drill pipe 500 rotates and penetrates continuously, the friction wheel set 656 forms a stopping friction relationship with the hole wall of the drilling 400, enabling it to have good guiding performance and reliable drilling accuracy. When the drill bit 620 withdraws from the drilling 400, the friction wheel set 656 has a rolling contact relationship with the hole wall of the drilling 400, and the distance between the first ring plate 651 and the second ring plate 652 is adjusted less, reducing the resistance generated during withdrawal.

[0046] Meanwhile, in this application, for deeper drillings 400, in order to ensure the drilling accuracy, a blowout preventer 300 is provided at the orifice of the drilling 400. While ensuring that the aquifer does not spout, the blowout preventer 300 achieves the effect of assisting in positioning the drill pipe 500.

[0047] Refer to Figure 6 , the blowout preventer 300 of this application includes: a steel casing 320 inserted into the interior of the drilling 400. After initially positioning the drilling angle, a drill bit larger than the diameter of the drilling 400 by 5 mm to 15 mm is installed through the drilling machine body 200, and a drilling 400 with a depth of not less than 200 cm is pre-drilled. Subsequently, the steel casing 320 is inserted into the drilling 400, and a positioning plate 310 is hermetically welded to the exposed end of the steel casing 320. Anchor holes 311 are opened at the four corners of the positioning plate 310. By anchor-mounting the positioning plate 310 on the drilling surface, a working hole position 312 communicating with the interior of the steel casing 320 is opened on the positioning plate 310. The steel casing 320 has the same inclination as the preset drilling angle. Subsequently, the matching drill bit 620 for the drilling 400 is replaced, and the drilling 400 operation is started.

[0048] During the continuous drilling process, in this application, a sector plate 316 that can be hydraulically driven to expand and contract on the positioning plate 310 is used to position the drill pipe 500. At the same time, it can increase the working distance of the drilling machine body 200, facilitating operation and preventing damage to the drilling machine body 200 caused by the collapse of the weak drill wall.

[0049] Combined Figures 7 - 9 As shown in Figure 7 It is a schematic diagram of the first embodiment of the blowout preventer and a schematic diagram of the initial working state of the positioning plate. The drill bit 620 enters the steel casing 320 through the working hole 312 for preliminary work. Figure 8 It is a schematic diagram of the second embodiment of the blowout preventer. During the rotation and advancement of the drill pipe 500, the two opposite sector plates 316 clamp the drill pipe 500 to ensure high positioning accuracy. Figure 9 It is a schematic diagram of the third embodiment of the blowout preventer. After the drill bit 620 exposes the aquifer, the water pressure exceeding the set threshold surges towards the orifice. The four sector plates 316 block the working hole 312 in a mutually closed manner to achieve strong and rapid water stop performance.

[0050] Specifically, the interior of the positioning plate 310 has a cross-shaped hydraulic chamber 315. Inside each hydraulic chamber 315, a sector plate 316 that can extend into the working hole 312 is slidably connected; as Figure 10 shown in, the sector plate 316 is connected to the corresponding hydraulic chamber 315 through a sliding plate 3161. An arc-shaped cavity 3163 adapted to the drill pipe 500 is provided at the end of each sector plate 316, and a plurality of elastic balls 3164 are rotatably connected inside the arc-shaped cavity 3163; the plurality of elastic balls 3164 are connected to the arc surface of the arc-shaped cavity 3163 through a pressing spring 3165, having rotational and retractable concealability. At the same time, rubber layers 3162 or rabbets are provided on both sides of each sector plate 316, so as to achieve the tightness of blocking the working hole 312.

[0051] In order to reduce manual intervention in plugging the working hole 312, in this application, the hydraulic system 210 of the drilling machine body 200 is used to adjust the extended position of the sector plate 316. Specifically, any two relatively opposed hydraulic chambers 315 are connected to the same oil pipeline, and the two oil pipelines are respectively connected to the hydraulic system 210 of the drilling machine body 200. When the drilling machine body 200 drives the drill rod 500 to rotate and advance, the hydraulic system 210 pumps oil into a corresponding oil pipeline, and the corresponding two sector plates 316 approach each other to press and position the drill rod 500, and multiple elastic balls 3164 are in rolling contact with the outer wall of the drill rod 500. When the pressure information received by the water pressure sensor 630 of the drilling machine body 200 exceeds the set threshold, the hydraulic system 210 pumps oil into the two oil pipelines, and the arc-shaped cavities 3163 of the four sector plates 316 surround the drill rod 500, and multiple elastic balls 3164 contract into the interior of the corresponding arc-shaped cavities 3163, and the four sector plates 316 seal the working hole 312. The two oil pipelines are respectively: the first pipeline 3131 connecting the two relatively opposed upper and lower hydraulic chambers 315, and the second pipeline 3141 connecting the two relatively opposed left and right hydraulic chambers 315. Among them, a first quick-connect valve 313 connected to the hydraulic system 210 is connected to the first pipeline 3131, and a second quick-connect valve 314 connected to the hydraulic system 210 is connected to the second pipeline 3141. It has the purpose of assisting in positioning and quickly and conveniently plugging the working hole 312, and avoiding accidents. The hydraulic system 210 is respectively connected to the two pipelines through quick-connect valves to achieve the purpose of separate control. According to the change of the angle during drilling, the corresponding two sector plates 316 are pre-extended to contact the drill rod 500, and multiple elastic balls 3164 only have a rotational relationship with the drill rod 500, reducing the friction coefficient. After the drill bit 620 exposes the aquifer, hydraulic oil is pumped into the first pipeline 3131 and the second pipeline 3141 at the same time until the four sector plates 316 are closed to each other, multiple elastic balls 3164 retract in place, and the arc surface of the arc-shaped cavity 3163 fits the outer wall of the drill rod 500, realizing fast and convenient sealing, and the water-stopping effect is remarkable.

[0052] In this application, after determining the drilling angle through the drilling machine body 200, the anti-blowout device 300 is installed after the initial drilling and then withdrawn; subsequently, the drill pipe 500 is continuously lengthened to explore the waterproof layer. As the drill pipe 500 goes deeper, the directional drilling frame group 650 provides a stable drilling angle guarantee. During the rotation of the drill pipe 500, a rotational connection relationship is formed with the first ring plate 651 and the second ring plate 652. The friction wheel group 656 forms a stopping friction during the movement along the drill hole 400, and the distance between the first ring plate 651 and the second ring plate 652 is lengthened to ensure a high anti-deviation property; at the same time, when drilling a relatively deep drill hole 400, the two sector plates 316 approach each other, so that the drill pipe 500 is located at the center of the steel casing 320 for drilling to avoid deflection and distortion; after exploring to the aquifer, the water pressure sensor 630 receives the pressure information, the first ring plate 651 and the second ring plate 652 form a preliminary water block, and the hydraulic system 210 pumps oil into the four hydraulic chambers 315 to quickly seal the working hole position 312 to achieve quick water stop and avoid accidents. The overall drilling process is precise, and the water stop effect is efficient and convenient.

[0053] Those of ordinary skill in the art should understand that any discussion of the above embodiments is exemplary only and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples; under the concept of the present disclosure, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of one or more embodiments of the present specification as above. For the sake of brevity, they are not provided in detail.

[0054] In addition, for the sake of simplicity of description and discussion, and in order not to make one or more embodiments of the present specification difficult to understand, the well-known power / ground connections of integrated circuits and other components may or may not be shown in the provided drawings. In addition, the device may be shown in block diagram form to avoid making one or more embodiments of the present specification difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform on which one or more embodiments of the present specification are to be implemented (i.e., these details should be completely within the understanding of those skilled in the art). In the case of elaborating specific details to describe the exemplary embodiments of the present disclosure, it is obvious to those skilled in the art that one or more embodiments of the present specification can be implemented without these specific details or with changes to these specific details. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0055] One or more embodiments of this specification are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of this specification shall be included within the scope of protection of this disclosure.

[0056] The above is only the specific implementation manner of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed by this application can easily think of changes or substitutions, which should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application shall be subject to the scope of protection of the claims.

Claims

1. A drilling device for coal mine construction, comprising a drilling device for drilling holes in tunnels to explore aquifers, and a blowout prevention device mounted at the orifice of the borehole; characterized in that: The drilling equipment comprises: a drilling machine body, a multi-section drill rod mounted on the drilling machine body, and a drill bit connected to the initial section drill rod; a mounting sleeve is mounted on the initial section drill rod, a water pressure sensor is mounted inside the mounting sleeve, and a wireless signal transmitter for transmitting the water pressure information of the aquifer detected by the water pressure sensor to the drilling machine body; The primary drill rod is also equipped with a directional drilling frame group; the directional drilling frame group includes: a first ring plate and a second ring plate; a plurality of folding rod groups are connected between the first ring plate and the second ring plate, the first ring plate is rotatably connected to the primary drill rod, and the second ring plate is slidably and rotatably connected to the primary drill rod; a friction wheel group in contact with the wall of the drill hole is symmetrically equipped on a side of the second ring plate facing away from the first ring plate; when the friction wheel group moves along the first direction, the friction wheel group and the wall of the drill hole are stopped and rubbed, and the folding rod group is in an unfolded state; when the friction wheel group moves along the second direction, the friction wheel group and the wall of the drill hole are rollingly contacted, and the folding rod group is in a folded state; The blowout prevention device comprises: a steel casing inserted into the borehole, and a positioning plate connected to the exposed end of the steel casing; the positioning plate is provided with a working hole connected to the interior of the steel casing, and the interior of the positioning plate is cross-intersected with hydraulic chambers, and the interior of each hydraulic chamber is slidably connected with a fan-shaped plate that can extend to the working hole; the end of each fan-shaped plate is provided with an arc cavity adapted to the drill rod, and the interior of the arc cavity is rotatably connected with a plurality of elastic balls; wherein, Any two opposite hydraulic chambers are connected to the same oil pipeline, and the two oil pipelines are respectively connected to the hydraulic system of the drilling machine body; When the drilling machine body drives the drill rod to rotate and move, the hydraulic system pumps oil to a corresponding oil pipeline, and the corresponding two fan-shaped plates approach each other to press and position the drill rod, and a plurality of elastic balls roll in contact with the outer wall of the drill rod; when the pressure information of the water pressure sensor received by the drilling machine body exceeds a set threshold, the hydraulic system pumps oil to the two oil pipelines, the arc-shaped cavities of the four fan-shaped plates embrace the drill rod, the plurality of elastic balls shrink to the inside of the corresponding arc-shaped cavities, and the four fan-shaped plates seal the working hole positions.

2. The drilling device for coal mine construction according to claim 1, characterized in that: The first ring plate and the second ring plate are both orifice plates with water-permeable holes.

3. The drilling device for coal mine construction according to claim 1, characterized in that: The first ring plate is fixedly sleeved on the primary drill pipe via a double-row roller bearing.

4. The drilling device for coal mine construction according to claim 3, characterized in that: The second ring plate is provided with a mounting through hole, and a plurality of universal balls are circumferentially arranged on the inner wall of the mounting through hole.

5. The drilling device for coal mine construction according to claim 4, characterized in that: The folding rod group includes: a first connecting rod rotatably connected to the first ring plate, and a second connecting rod rotatably connected to the second ring plate; wherein the first connecting rod and the second connecting rod are connected by a rotating shaft at one end facing each other.

6. The drilling device for coal mine construction according to claim 5, characterized in that: A plurality of adaptive telescopic rods are connected between the first ring plate and the second ring plate.

7. The drilling device for coal mine construction according to claim 1, characterized in that: The friction wheel sets are all connected to the second ring plate via hinged rods, and the second ring plate is provided with a plurality of springs connected to the hinged rods.

8. The drilling device for coal mine construction according to claim 7, characterized in that: The friction wheel set is a wheel set with a ratchet structure.

9. The drilling device for coal mine construction according to claim 1, characterized in that: The positioning plate is provided with a plurality of anchor holes.

10. The drilling device for coal mine construction according to claim 9, characterized in that: The two oil delivery pipelines are: a first pipeline connecting two hydraulic chambers opposite to each other, and a second pipeline connecting two hydraulic chambers opposite to each other; wherein, The first pipeline is connected with a first quick-connect valve connected with the hydraulic system, and the second pipeline is connected with a second quick-connect valve connected with the hydraulic system.

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