A rapid drilling and backfilling device for cracks in coal seam subsidence areas

Abstract

The present invention discloses a rapid drilling and backfilling device for cracks in a coal seam subsidence area, which includes a drill rig, an outer cylinder, drill pipes and a drilling probe. The outer cylinder and the drill pipes are installed and connected to the drill rig. A drilling probe is installed at the lower end of the drill pipes. On the inner wall of the outer cylinder, a first mounting seat and a second mounting seat are respectively fixed. The drilling probe includes a rotating shell cover and a telescopic middle rod. The rotating shell cover is rotatably connected to the first mounting seat and the second mounting seat. The telescopic middle rod includes an upper column rod and a lower column cylinder. The upper column rod is embedded in the middle of the rotating shell cover. A drill bit is connected to the lower end of the lower column cylinder. The upper end of the lower column cylinder is embedded in the middle of a flow blocking component, and the flow blocking component is installed on the inner wall of the rotating shell cover.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling in coal seam subsidence areas, and specifically to a rapid drilling and backfilling device for cracks in coal seam subsidence areas. Background Art

[0002] During the monitoring of the condition of coal seams, drilling is carried out on the deep part of the coal seam through the drilling method, so as to facilitate understanding the conditions of different depths of the coal seam. Among them, when drilling the coal seam at the crack of the coal seam subsidence area, when the existing drilling equipment is used for drilling, due to the uneven distribution of the hardness of the rock formation texture in the coal seam subsidence area, the outside of the drilling probe will be subjected to irregular and uneven collisions, and moreover, the phenomena of borehole collapse and drill sticking are likely to occur. At the same time, the drilling rate is slow and unstable.

[0003] Therefore, those skilled in the art have provided a rapid drilling and backfilling device for cracks in coal seam subsidence areas to solve the problems raised in the above background art. Summary of the Invention

[0004] To achieve the above object, the present invention provides the following technical solution: A rapid drilling and backfilling device for cracks in coal seam subsidence areas, including a drill rig, an outer cylinder, a drill pipe and a drilling probe. The outer cylinder and the drill pipe are installed and connected to the drill rig. The lower end of the drill pipe is installed with a drilling probe. The inner wall of the outer cylinder is respectively fixed with a mounting seat one and a mounting seat two. The drilling probe includes a rotating shell cover and a telescopic middle rod. The rotating shell cover is rotatably connected to the mounting seat one and the mounting seat two. The telescopic middle rod includes an upper column rod and a lower column cylinder. The upper column rod is embedded in the middle of the rotating shell cover. The lower end of the lower column cylinder is connected with a drill bit. The upper end of the lower column cylinder is embedded in the middle of a flow blocking component. The flow blocking component is installed on the inner wall of the rotating shell cover.

[0005] Further, preferably, the flow blocking component includes an outer guiding slide rail and a flow blocking sleeve. The outer guiding slide rail is fixed on the inner wall of the rotating shell cover. The lower end of the outer guiding slide rail is fixed with a lower stop block. The cross-section of the flow blocking sleeve is in a Z-shaped structure on one side. A vertical guiding groove is opened on the inner circumferential wall of the flow blocking sleeve. The upper end of the guiding groove is fixed with an upper stop block. A slider is also fixed on the upper circumferential wall of the flow blocking sleeve.

[0006] The flow blocking sleeve is configured as first sleeves, second sleeves and third sleeves with different inner diameters. The slider in the first sleeve is slidably connected to the guiding groove in the second sleeve. The slider in the second sleeve is slidably connected to the guiding groove in the third sleeve. The slider in the third sleeve is slidably connected to the outer guiding slide rail. And between the first sleeve and the second sleeve, between the second sleeve and the third sleeve, and between the third sleeve and the inner wall of the rotating shell cover are respectively connected by a first connecting spring.

[0007] Further, preferably, it further includes a flow hole, hydraulic oil, control oil pump one, control oil pump two, a storage oil tank, and a ring gasket. The flow hole is opened on the longitudinal wall of the flow-blocking sleeve housing, and the number of flow holes in the flow-blocking sleeve housing with a smaller inner diameter is less than that in the flow-blocking sleeve housing with a larger inner diameter. The ring gasket is fixedly installed on the lower port of the rotating housing cover and is hermetically fitted with the outer wall of the lower cylinder.

[0008] The hydraulic oil is filled inside the rotating housing cover. The control oil pump one and the control oil pump two are respectively fixed outside the rotating housing cover. The inlet end of the control oil pump one is connected to a conduit one, and the conduit one is connected to the lower chamber of the rotating housing cover. The discharge end of the control oil pump two is connected to a conduit two, and the conduit two is connected to the upper chamber of the rotating housing cover. Moreover, the discharge end of the control oil pump one and the inlet end of the control oil pump two are respectively connected to a group of the storage oil tanks, and the two groups of storage oil tanks are connected through a short pipe.

[0009] Further, preferably, a uniformly laid bulging bladder is provided on the upper liquid surface of the hydraulic oil, and the bulging bladder is connected to the inner wall of the upper end of the rotating housing cover.

[0010] Further, preferably, the outer side of the ring gasket is hermetically fixed to the inner wall of the rotating housing cover through a tensioning ring piece.

[0011] Further, preferably, a guiding sliding sleeve one and a guiding sliding sleeve two are fixedly installed outside the lower end of the rotating housing cover. The guiding sliding sleeve one is slidably sleeved outside the lower cylinder, and the lower end of the guiding sliding sleeve two is slidably sleeved outside the drill bit. Moreover, a connecting spring two is also connected between the guiding sliding sleeve one and the drill bit.

[0012] Further, preferably, it further includes multiple groups of filling pipes. The filling pipes are fixedly installed through mounting seat one and mounting seat two, and the lower ends of the filling pipes are close to the drill bit.

[0013] Further, preferably, a slidable sliding cylinder hole pipe is sleeved on the lower end of the filling pipe. The sliding cylinder hole pipe is connected to a transfer seat through a top extension spring, and the transfer seat is fixedly sleeved on the filling pipe.

[0014] Compared with the prior art, the present invention provides a rapid drilling and backfilling device for cracks in coal seam subsidence areas, having the following beneficial effects:

[0015] In the present invention, through the settings of the telescopic middle rod, the flow-blocking component, and the connecting spring II, an elastic support deformable structure is formed between the drill bit and the drill pipe, enabling the drill bit to adapt to different textures and hardnesses of rock during the process of diving and drilling. On this basis, through the settings of the hydraulic oil, the control oil pump I, and the control oil pump II, it can be further ensured that when the drill bit switches between different rock layers, the elastic pushing force of the drill bit can be actively controlled and regulated, so that when the drill bit drills different rock layers, the optimal drilling force can be applied, thereby improving the protection of the drill bit, avoiding drill sticking, and with the cooperation of the bulging bladder, the drill bit can effectively absorb and buffer the impact of short-term low-frequency irregular actions, ensuring the drilling rate of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the drilling and backfilling equipment of the present invention;

[0017] Figure 2 is an enlarged partial structural diagram of the filling pipe of the present invention;

[0018] Figure 3 is an enlarged partial structural diagram of the drilling probe of the present invention;

[0019] Figure 4 is an enlarged structural diagram of the group flow component of the present invention;

[0020] In the figure: 1, drill rig; 2, outer cylinder; 3, drill pipe; 4, drilling bit; 5, mounting seat I; 6, mounting seat II; 7, filling pipe; 8, sliding cylinder hole pipe; 9, top extension spring; 10, telescopic middle rod; 11, drill bit; 12, rotating shell cover; 13, flow-blocking component; 14, hydraulic oil; 15, conduit I; 16, control oil pump I; 17, control oil pump II; 18, fuel tank; 19, conduit II; 20, bulging bladder; 21, first housing; 22, second housing; 23, third housing; 24, guide groove; 25, slider; 26, flow hole; 27, upper stop block; 28, connecting spring I; 29, outer guide slide rail; 30, lower stop block; 31, expansion ring piece; 32, ring gasket; 33, guide sliding sleeve I; 34, guide sliding sleeve II; 35, connecting spring II. DETAILED DESCRIPTION OF THE INVENTION

[0021] Refer to Figures 1-4, the present invention provides a technical solution: a rapid drilling and backfilling device for cracks in a coal seam collapse area, including a drill rig 1, an outer cylinder 2, a drill pipe 3 and a drilling probe 4. The outer cylinder 2 and the drill pipe 3 are installed and connected to the drill rig 1. The lower end of the drill pipe 3 is installed with a drilling probe 4. On the inner wall of the outer cylinder 2, a first mounting seat 5 and a second mounting seat 6 are respectively fixed. The drilling probe 4 includes a rotating shell cover 12 and a telescopic middle rod 10. The rotating shell cover 12 is rotatably connected to the first mounting seat 5 and the second mounting seat 6. The telescopic middle rod 10 includes an upper column rod and a lower column cylinder. The upper column rod is fixedly embedded in the middle of the rotating shell cover 12. The lower end of the lower column cylinder is connected with a drill bit 11. The upper end of the lower column cylinder is fixedly embedded in the middle of a flow blocking component 13. The flow blocking component 13 is installed on the inner wall of the rotating shell cover 12;

[0022] In this embodiment, a cross-shaped sliding groove is formed on the outer surface of the upper column rod, and a cross-shaped rib is provided on the inner cylinder wall of the lower column cylinder. The rib is slidably connected to the cross-shaped sliding groove. So that under the condition of ensuring the telescopic function, the rotational force of the drill pipe can be directly and more stably transmitted to the lower column cylinder, thereby driving the drill bit to rotate and drill. The flow blocking component is used to push the lower column cylinder, so that the lower column cylinder extends downward, thereby reserving a certain buffer height. So that when the drill bit encounters a hard rock layer or a crack or a soft rock layer, it can cope with the top pressure or clamping misalignment or pulling down condition suffered by the drill bit. And it should be noted that the pressure of the drill bit on the rock layer is an elastic deformable top pressure transformed from the top pressure of the drill pipe. So that no matter what force is generated on the drill bit due to top pressure or clamping misalignment or pulling down, it can well cooperate with the displacement movement, thereby providing a reaction time for regulating the drilling rate and protecting the drill bit.

[0023] In this embodiment, the flow blocking component 13 includes an outer guiding slide rail 29 and a flow blocking sleeve. The outer guiding slide rail 29 is fixed on the inner wall of the rotating shell cover. A lower stop block 30 is fixed at the lower end of the outer guiding slide rail 29. The cross section of the flow blocking sleeve is in a Z-shaped structure on one side. A vertical guiding groove 24 is formed on the inner circumferential wall of the flow blocking sleeve. An upper stop block 27 is fixed at the upper end of the guiding groove. A slider 25 is also fixed on the upper side circumferential wall of the flow blocking sleeve;

[0024] The flow blocking sleeve is configured as a first sleeve 21, a second sleeve 22, and a third sleeve 23 with different inner diameter specifications. The slider in the first sleeve 21 is slidably connected to the guiding groove in the second sleeve 22. The slider in the second sleeve 22 is slidably connected to the guiding groove in the third sleeve 23. The slider in the third sleeve 23 is slidably connected to the outer guiding slide rail 29. And between the first sleeve 21 and the second sleeve 22, between the second sleeve 22 and the third sleeve 23, and between the third sleeve 23 and the inner wall of the rotating shell cover 12, they are respectively connected by a first connecting spring 28.

[0025] In this embodiment, there are also a flow hole 26, hydraulic oil 14, a first control oil pump 16, a second control oil pump 17, an oil storage tank 18, and a ring gasket 32. The flow hole 26 is opened on the longitudinal wall of the flow blocking sleeve housing, and the number of flow holes 26 in the flow blocking sleeve housing with a smaller inner diameter is less than that in the flow blocking sleeve housing with a larger inner diameter. The ring gasket 32 is fixedly installed on the lower port of the rotating housing cover and is hermetically attached to the outer wall of the lower cylinder.

[0026] The hydraulic oil 14 is filled inside the rotating housing cover 12. The first control oil pump 16 and the second control oil pump 17 are respectively fixed outside the rotating housing cover. The inlet end of the first control oil pump 16 is connected to a first conduit 15, and the first conduit 15 is connected to the lower chamber of the rotating housing cover 12. The outlet end of the second control oil pump 17 is connected to a second conduit 19, and the second conduit 19 is connected to the upper chamber of the rotating housing cover 12. Moreover, the outlet end of the first control oil pump 16 and the inlet end of the second control oil pump 17 are respectively connected to a group of the oil storage tanks 18, and the two groups of the oil storage tanks 18 are connected through a short pipe.

[0027] In the above embodiment, the combined structure of the first sleeve housing, the second sleeve housing, and the third sleeve housing is provided to separate the hydraulic oil into an upper oil body and a lower oil body. The first control oil pump is used to control the discharge rate of the lower oil body, the second control oil pump is used to control the inlet rate of the upper oil body, and the flow hole is used for the upper oil body to flow into the lower oil body. Therefore, by changing the regulation rates of the first control oil pump and the second control oil pump on the hydraulic oil, the combined structure can be actively controlled to extend or retract downward or upward.

[0028] In this embodiment, a uniformly laid expansion bladder 20 is also provided on the upper liquid surface of the hydraulic oil 14. The expansion bladder 20 is connected to the inner wall of the upper end of the rotating housing cover, so that the inside of the rotating housing cover is completely filled by the two parts of the hydraulic oil and the expansion bladder. Therefore, the combined structure can provide telescopic deformation for the lower cylinder and the drill bit through the compensation of the volume deformation of the expansion bladder even under the premise of active control. At the same time, the combined structure will also correspondingly extend or retract, and the number of flow holes on the upper inner side or the lower outer side of the action surface will also change accordingly, so as to adaptively change the flow rate of the upper oil body flowing into the lower oil body, and thus generate resistance. Therefore, when the drill bit is subjected to short-term low-frequency irregular impacts, through the structural forms of the expansion bladder, the combined structure, and the upper oil body flowing into the lower oil body, the stability of the drill bit can be effectively ensured. When the drill bit is subjected to large and long-term stable impacts, after the expansion bladder and the combined structure are deformed, if it is difficult to reset, at this time, the rate of the upper oil body can be regulated by the second control oil pump or the rate of the lower oil body can be controlled by the first control oil pump. Specifically, for example, when the combined structure is stretched, the rate of the upper oil body regulated by the second control pump is increased, and when the combined structure is compressed, the rate of the upper oil body regulated by the second control pump is decreased.

[0029] In the above embodiments, there is at least a monitoring module for monitoring the moving positions of the first housing, the second housing, and the third housing.

[0030] In this embodiment, the outer side surface of the annular gasket 32 is fixedly sealed with the inner wall of the rotating housing cover through the expansion ring piece 31.

[0031] In this embodiment, a first guiding sliding sleeve 33 and a second guiding sliding sleeve 34 are fixedly installed outside the lower end of the rotating housing cover. The first guiding sliding sleeve 33 is slidably sleeved outside the lower cylinder, and the lower end of the second guiding sliding sleeve 34 is slidably sleeved outside the drill bit 11. A second connecting spring 35 is also connected between the first guiding sliding sleeve 33 and the drill bit 11.

[0032] In this embodiment, there are also multiple groups of filling pipes 7 installed. The filling pipes 7 are fixedly installed through the first mounting seat and the second mounting seat 6, and the lower ends of the filling pipes 7 are close to the drill bit 11.

[0033] In this embodiment, a slidable sliding cylinder hole pipe 8 is sleeved at the lower end of the filling pipe 7. The sliding cylinder hole pipe 8 is connected to the adapter seat through the top extension spring 9. The adapter seat is fixedly sleeved on the filling pipe 7 so that the discharge port of the filling pipe is close to one side of the drill bit, facilitating the discharge of the filling liquid.

[0034] During the specific implementation, from the start of drilling to the process of diving, first, through the control of the first control oil pump and the second control oil pump for the hydraulic oil, and combined with the action of the second connecting spring, an elastic pushing force is generated on the drill bit until the deformation amounts of the second connecting spring and the combined structure reach a certain stable fluctuation, and the control rates of the first control oil pump and the second control oil pump are maintained. Therefore, during the continuous diving drilling process, when the drill bit encounters a short-term low-frequency force, the first control oil pump and the second control oil pump do not need to be adjusted. When the drill bit encounters a non-short-term low-frequency force, it indicates that the texture of the rock formation where the drill bit travels has changed. At this time, through the deformation feedback of the combined structure and the second connecting spring, it can be known that the drill bit is pushed or stretched, and it can be further known the hardness condition of the rock formation texture. Therefore, through the action of the combined structure, the second connecting spring, and the bulging bladder, valuable time and effective buffering are won for adjusting the drilling rate of the drill bit. At the same time, the drill bit can continue to move forward for drilling, and the first control oil pump and the second control oil pump are adjusted in time to reach a certain stable fluctuation again. And through the filling pipe, the collapsed hole wall can also be filled to avoid continuous collapse outside the collapsed hole, thereby avoiding damage or sticking of the drill bit.

[0035] The above is only a preferred specific implementation manner of the invention, but the protection scope of the invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the invention, according to the technical solution of the invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the invention.

Claims

1. A rapid drilling and backfilling device for cracks in a coal seam subsidence area, comprising a drill rig (1), an outer cylinder (2), drill pipes (3) and a drilling probe (4). The outer cylinder (2) and the drill pipes (3) are installed and connected to the drill rig (1). The lower end of the drill pipe (3) is installed with the drilling probe (4). On the inner wall of the outer cylinder (2), a first mounting seat (5) and a second mounting seat (6) are respectively fixed. It is characterized in that, The drilling probe (4) includes a rotating housing (12) and a telescopic middle rod (10). The rotating housing (12) is rotatably connected to the first mounting base (5) and the second mounting base (6). The telescopic middle rod (10) includes an upper column rod and a lower column cylinder. The upper column rod is fixedly embedded in the middle of the rotating housing (12). The lower end of the lower column cylinder is connected to a drill bit (11). The upper end of the lower column cylinder is fixedly embedded in the middle of the flow-blocking assembly (13). The flow-blocking assembly (13) is installed on the inner wall of the rotating housing (12). The flow-blocking assembly (13) includes an outer guiding slide rail (29) and a flow-blocking sleeve housing. The outer guiding slide rail (29) is fixed on the inner wall of the rotating housing. A lower stop block (30) is fixed at the lower end of the outer guiding slide rail (29). One side of the cross-section of the flow-blocking sleeve housing is in a Z-shaped structure. A vertical guiding groove (24) is formed on the inner circumferential wall of the flow-blocking sleeve housing. An upper stop block (27) is fixed at the upper end of the guiding groove. A sliding block (25) is also fixed on the upper circumferential wall of the flow-blocking sleeve housing. The flow-blocking sleeve housing is configured as a first sleeve housing (21), a second sleeve housing (22), and a third sleeve housing (23) with different inner diameters. The sliding block in the first sleeve housing (21) is slidably connected to the guiding groove in the second sleeve housing (22). The sliding block in the second sleeve housing (22) is slidably connected to the guiding groove in the third sleeve housing (23). The sliding block in the third sleeve housing (23) is slidably connected to the outer guiding slide rail (29). And between the first sleeve housing (21) and the second sleeve housing (22), between the second sleeve housing (22) and the third sleeve housing (23), and between the third sleeve housing (23) and the inner wall of the rotating housing (12), they are respectively connected by a first connecting spring (28). The flow-blocking assembly (13) further includes a flow hole (26), hydraulic oil (14), a first control oil pump (16), a second control oil pump (17), an oil storage tank (18), and a ring gasket (32). The flow hole (26) is formed on the longitudinal shell wall of the flow-blocking sleeve housing. And the number of flow holes (26) in the flow-blocking sleeve housing with a smaller inner diameter is less than the number of flow holes (26) in the flow-blocking sleeve housing with a larger inner diameter. The ring gasket (32) is fixedly installed on the lower port of the rotating housing and is hermetically fitted with the outer wall of the lower column cylinder. The hydraulic oil (14) is filled inside the rotating housing (12). The first control oil pump (16) and the second control oil pump (17) are respectively fixed outside the rotating housing. The inlet end of the first control oil pump (16) is communicated with a first conduit (15). The first conduit (15) is communicated with the lower chamber of the rotating housing (12). The outlet end of the second control oil pump (17) is communicated with a second conduit (19). The second conduit (19) is communicated with the upper chamber of the rotating housing (12). And the outlet end of the first control oil pump (16) and the inlet end of the second control oil pump (17) are respectively communicated with a group of oil storage tanks (18). The two groups of oil storage tanks (18) are communicated through a short pipe.

2. The rapid drilling and backfilling device for cracks in a coal seam subsidence area according to claim 1, characterized in that, A uniformly laid bulging bladder (20) is also provided on the upper liquid surface of the hydraulic oil (14). The bulging bladder (20) is connected to the upper inner wall of the rotating housing.

3. The rapid drilling and backfilling device for cracks in a coal seam subsidence area according to claim 1, characterized in that, The outer side surface of the ring gasket (32) is hermetically fixed to the inner wall of the rotating housing through a tensioning ring piece (31).

4. The rapid drilling and backfilling device for cracks in a coal seam subsidence area according to claim 1, characterized in that, A guide sliding sleeve one (33) and a guide sliding sleeve two (34) are fixedly installed outside the lower end of the rotating shell cover. The guide sliding sleeve one (33) is slidably sleeved outside the lower column cylinder. The lower end of the guide sliding sleeve two (34) is slidably sleeved outside the drill bit (11), and a connecting spring two (35) is also connected between the guide sliding sleeve one (33) and the drill bit (11).

5. The rapid drilling and backfilling device for cracks in a coal seam subsidence area according to claim 1, characterized in that, The drilling and backfilling device further includes a plurality of groups of filling pipes (7). The filling pipes (7) are fixedly installed through the mounting seat one and the mounting seat two (6), and the lower ends of the filling pipes (7) are close to the drill bit (11).

6. The rapid drilling and backfilling device for cracks in a coal seam subsidence area according to claim 5, characterized in that, A slidable sliding cylinder hole pipe (8) is sleeved at the lower end of the filling pipe (7). The sliding cylinder hole pipe (8) is connected to the adapter seat through a top extension spring (9), and the adapter seat is fixedly sleeved on the filling pipe (7).

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