阅读说明：本技术 用于薄煤层底板的破碎方法 (Crushing method for thin coal seam floor ) 是由 胡滨 张晓� 雷顺 杜龙飞 方铭 祝凌甫 伊丙鼎 顾士超 孙明清 高新宁 于 2021-07-29 设计创作，主要内容包括：本发明提供一种用于薄煤层底板的破碎方法,包括以下步骤：通过钻孔装置对薄煤层底板进行钻孔,形成孔洞；通过液体输出装置向所述孔洞内部输出高压液体,钻孔装置对薄煤层底板完成初步破碎后,通过液体输出装置向孔洞内部输出高压液体,通过高压液体对孔洞周围的薄煤层底板进行冲击,水压对孔洞周围的薄煤层底板起到了进一步压裂的效果,更有效地破坏了薄煤层底板的完整性,更有利于薄煤层底板的破碎工作,从而保证了合理的开采高度,提高薄煤层的开采效率,同时由于高压液体进入压裂裂隙中,使得采煤机截割底板岩石时粉尘浓度大为下降,降低了开采现场的粉尘浓度,改善了施工环境。(The invention provides a crushing method for a thin coal seam floor, which comprises the following steps: drilling a thin coal seam bottom plate through a drilling device to form a hole; the high-pressure liquid is output to the inside of the hole through the liquid output device, after the drilling device finishes primary crushing on the thin seam floor, the high-pressure liquid is output to the inside of the hole through the liquid output device, the thin seam floor around the hole is impacted through the high-pressure liquid, the water pressure plays a role in further fracturing on the thin seam floor around the hole, the integrity of the thin seam floor is damaged more effectively, the thin seam floor crushing work is facilitated, the reasonable mining height is ensured, the mining efficiency of the thin seam is improved, meanwhile, the high-pressure liquid enters a fracturing fracture, the dust concentration is greatly reduced when the coal mining machine cuts the floor rock, the dust concentration of a mining site is reduced, and the construction environment is improved.)

1. A crushing method for a thin coal seam floor is characterized by comprising the following steps:

drilling a thin coal seam bottom plate through a drilling device to form a hole;

and outputting high-pressure liquid to the inside of the hole through a liquid output device.

2. The method for crushing a thin coal seam floor according to claim 1, wherein before the step of outputting the high-pressure liquid to the inside of the hole through the liquid output device, the side of the high-pressure liquid output position of the hole close to the hole opening of the hole is blocked through the first blocking piece.

3. The method for crushing a thin coal seam floor according to claim 2, wherein before the step of outputting the high-pressure liquid to the inside of the hole through the liquid output device, the side of the high-pressure liquid output position of the hole, which is far away from the hole opening of the hole, is blocked through the second blocking piece.

4. The method for fracturing a thin coal seam floor according to claim 2 or 3, wherein the first plugging member and/or the second plugging member comprises a flexible bladder, the flexible bladder is communicated with a first pump, and gas is output to the flexible bladder through the first pump to inflate the flexible bladder until the outer diameter of the flexible bladder is matched with the aperture of the hole.

5. The method of fracturing a floor of a thin coal seam of claim 4 wherein the first pump body comprises a manual pressure pump.

6. The method of claim 3, wherein a groove is cut in the hole at a position between the first block piece and the second block piece in the hole in a radial direction of the hole to form a groove before the step of delivering high-pressure liquid into the hole through the liquid delivery device.

7. The method of claim 6, wherein the groove is an annular structure surrounding the hole.

8. The method of claim 6, wherein the drilling apparatus comprises a drill body and a cutter movably connected to the drill body and receivable within the drill body, the cutter configured to cut the groove to form the recess.

9. The method of fracturing a floor of a thin coal seam of claim 8, wherein the drilling apparatus further comprises:

the drilling tool body is connected with the sliding rail in a sliding manner;

and the water spraying mechanism is used for spraying water when the drilling tool body performs drilling work.

10. The method of claim 1, wherein the liquid output device comprises:

the input end of the water spraying pipeline is communicated with a water source, and the output end of the water spraying pipeline is used for outputting high-pressure liquid to the hole;

and the second pump body is used for pressurizing the liquid in the water spraying pipeline.

Technical Field

The invention relates to the technical field of building construction, in particular to a crushing method for a thin coal seam bottom plate.

Background

The method is mainly based on the objective reason that the thin coal seam mining space is small, the mining height is unreasonable, the mining efficiency is low, and finally a large amount of thin coal seam coal resources are in a shelving state.

In order to ensure reasonable mining height in the mining process of a thin coal seam, the inventor adopts a method of cutting bottom plate rocks by a coal cutter so as to widen mining space, the rocks of the bottom plate of the coal seam in many mining areas are hard, the consumption of cutting teeth of a roller of the coal cutter is very high, on average, a plurality of cutting teeth need to be replaced for each coal cutter, parts such as a machine body, a rocker arm and the like of the coal cutter are greatly damaged in the cutting process, the failure rate of equipment is high, and meanwhile, due to the fact that the rock cutting causes that the concentration of dust in an operation field is seriously overproof, the labor intensity of workers is high, the single-shift circulation footage is less, and the method is not beneficial to realizing high-efficiency mining.

Disclosure of Invention

The invention provides a crushing method for a thin coal seam floor, which aims to solve the problem that the thin coal seam in the prior art is difficult to ensure reasonable mining height so as to improve the mining efficiency of the thin coal seam.

The invention provides a crushing method for a thin coal seam floor, which comprises the following steps:

drilling a thin coal seam bottom plate through a drilling device to form a hole;

and outputting high-pressure liquid to the inside of the hole through a liquid output device.

Further, before the step of outputting high-pressure liquid to the inside of the hole through the liquid output device, one side, close to the hole opening of the hole, of the high-pressure liquid output position of the hole is blocked through the first blocking piece.

Further, before the step of outputting high-pressure liquid to the inside of the hole through the liquid output device, one side, far away from the hole opening of the hole, of the high-pressure liquid output position of the hole is blocked through the second blocking piece.

Further, the first blocking piece and/or the second blocking piece comprise a flexible bag body, the flexible bag body is communicated with the first pump body, and gas is output to the flexible bag body through the first pump body to enable the flexible bag body to expand until the outer diameter of the flexible bag body is matched with the aperture of the hole.

Further, the first pump body includes a manual pressure pump.

Further, before the step of outputting high-pressure liquid to the inside of the hole through the liquid output device, a groove is cut along the radial direction of the hole at a position between the first blocking piece and the second blocking piece in the hole to form a groove.

Further, the groove is of an annular structure surrounding the hole.

Further, the drilling device comprises a drilling tool body and a cutter, wherein the cutter is movably connected to the drilling tool body and can be accommodated in the drilling tool body, and the cutter is used for cutting a groove to form the groove.

Furthermore, the drilling device further comprises a sliding rail and a water spraying mechanism, the drilling tool body is connected to the sliding rail in a sliding mode, and the water spraying mechanism is used for spraying water when the drilling tool body conducts drilling work.

Further, the liquid output device comprises a water spraying pipe and a second pump body, wherein the input end of the water spraying pipe is communicated with a water source, the output end of the water spraying pipe is used for outputting high-pressure liquid to the hole, the second pump body is used for pressurizing the liquid in the water spraying pipe, and particularly the second pump body comprises a high-pressure pump body.

The crushing method for the thin coal seam floor provided by the invention has the beneficial effects that:

the thin seam bottom plate is drilled through the drilling device to form a hole, after the thin seam bottom plate is primarily crushed by the drilling device, high-pressure liquid is output to the inside of the hole through the liquid output device, the thin seam bottom plate around the hole is impacted through the high-pressure liquid, the water pressure plays a role in further fracturing on the thin seam bottom plate around the hole, the integrity of the thin seam bottom plate is effectively damaged, the thin seam bottom plate can be crushed, reasonable mining height is guaranteed, the mining efficiency of the thin seam is improved, meanwhile, as the high-pressure liquid enters a fracturing crack, the dust concentration generated when equipment such as a coal mining machine is adopted to further cut the bottom plate rock subsequently is greatly reduced, the dust concentration of a mining site is reduced, and the construction environment is improved.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic workflow diagram of a crushing method for a thin coal seam floor according to a first embodiment;

FIG. 2 is a schematic structural diagram of a thin coal seam floor when the drilling step of the first embodiment is performed;

FIG. 3 is a schematic structural diagram of a thin coal seam floor when the plugging step of the first embodiment is performed;

FIG. 4 is a schematic structural diagram of a thin coal seam floor when the high-pressure water output step of the first embodiment is performed;

FIG. 5 is a schematic top view of the structure of the drilling device of the second embodiment;

FIG. 6 is a schematic cross-sectional view of a water spray pipe according to a second embodiment;

FIG. 7 is a schematic view of the cross-sectional A-A configuration of FIG. 6;

description of reference numerals:

1. a drilling device; 11. a drilling tool body; 12. a cutter; 13. a slide rail; 14. a water spraying mechanism; 2. a liquid output device; 21. a water spray pipe; 211. a through hole; 22. a high pressure pump body; 3. a first blocking member; 4. a second blocking member; 5. a manual pressure pump; 51. a pressure gauge; 52. a hose; 6. a groove; 7. a thin seam floor; 8. and (4) holes.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, reference to the description of the terms "one embodiment," "first-aspect embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The crushing method for the thin coal seam floor provided by the invention is described below with reference to fig. 1-7.

As shown in fig. 1 to 4, according to an embodiment of the present invention, there is provided a crushing method for a thin coal seam floor, including the steps of:

the method comprises the following steps: drilling a thin coal seam bottom plate 7 through the drilling device 1 to form a hole 8;

step two: high-pressure liquid is output to the inside of the hole 8 through the liquid output device 2.

The working principle is as follows: drilling is carried out to thin seam bottom plate 7 through drilling equipment 1, form hole 8, and after drilling equipment 1 accomplished preliminary breakage to thin seam bottom plate 7, through liquid output device 2 to the inside output high-pressure liquid of hole 8, strike thin seam bottom plate 7 around hole 8 through high-pressure liquid, high-pressure liquid gets into the fracturing crack, and water pressure has played further fracturing's effect to thin seam bottom plate 7 around the hole 8, has destroyed thin seam bottom plate 7's integrality more effectively.

According to the present embodiment, before the step "output high-pressure liquid to the inside of the hole 8 through the liquid output device 2", the side of the high-pressure liquid output position of the hole 8 close to the hole opening of the hole 8 is blocked by the first blocking member 3. It is avoided that high pressure liquid leaks out from the hole 8 when acting on the location where the hole 8 needs to be fractured and reduces the fracturing effect.

According to the present embodiment, before the step "output high-pressure liquid to the inside of the hole 8 through the liquid output device 2", the side of the high-pressure liquid output position of the hole 8 away from the hole opening of the hole 8 is blocked by the second blocking member 4. The position that needs carry out the fracturing to hole 8 jointly through first shutoff piece 3 and second shutoff piece 4 forms the shutoff section, when having guaranteed the fracturing effect, has improved the precision of fracturing effect, avoids high-pressure liquid to act on other positions that need not carry out the fracturing of hole 8.

According to this embodiment, first shutoff piece 3 and second shutoff piece 4 all include a plurality of flexible utricules, and the first pump body of flexible utricule intercommunication makes the expansion of flexible utricule to flexible utricule export gas through the first pump body, and the external diameter of up to flexible utricule cooperates with the aperture of hole 8. Specifically, the flexible bag body is made of rubber, and when plugging is not needed, the flexible bag body is convenient to carry after media such as liquid or gas in the flexible bag body are released.

According to the present embodiment, the first pump body comprises a manual pressure pump 5. The output pressure of the manual pressure pump 5 can meet the requirement of expansion of the flexible bag body, the structure is simple, the cost is low, the control of starting and stopping the pressure output is easily realized according to the working requirement, and the working personnel can conveniently check the tightness of the first plugging piece 3 or the second plugging piece 4 in the pressure output process.

Specifically, the flexible bladder is detachably communicated with the manual pressure pump 5 through a rubber tube 52.

According to the embodiment, before the step of "outputting high-pressure liquid to the inside of the hole 8 through the liquid output device 2", the groove 6 is formed by grooving the thin seam floor 7 along the radial direction of the hole 8 at the position between the first blocking piece 3 and the second blocking piece 4 in the hole 8. Understandably, the grooving work is performed before the plugging work by the first plugging member 3 and the second plugging member 4, the grooving work is performed at the high-pressure liquid output position, or the grooving work can be performed near the high-pressure liquid output position, and in order to avoid the grooving position from coinciding with the position of the first plugging member 3 or the second plugging member 4, the specific grooving work steps are as follows: the arrangement positions of the first plugging member 3 and the second plugging member 4 are determined first, the grooving position is arranged between the arrangement position of the first plugging member 3 and the arrangement position of the second plugging member 4, and after the groove 6 is completed, the plugging work of the first plugging member 3 and the second plugging member 4 is performed. By grooving the thin seam bottom plate 7 and fracturing the position of the groove 6 through high-pressure liquid, under the action of the high-pressure liquid, the thin seam bottom plate 7 generates reticular cracks from the groove 6 to the periphery of the groove 6, and the fracturing effect on the thin seam bottom plate 7 is further improved.

According to this embodiment, the recess 6 is an annular structure surrounding the hole 8. The fracturing effect is more uniform.

Understandably, the drilling device 1, the manual pressure pump 5 and the liquid output device 2 are all provided with a human-computer interaction module for operators to control, and the manual pressure pump 5 is provided with a pressure gauge 51 for the operators to observe.

Specifically, to ensure the crushing effect, the following arrangement method may be adopted for arranging the drilling start end, i.e., the drilling hole, of the drilling device 1: a plurality of drill holes are respectively arranged on the rock of a thin coal seam floor at the hole cutting position of a working face, the transportation crossheading and the return air crossheading, the starting end of the drill hole of the drilling device 1, namely the position of a drill hole opening, is 0.4m away from the coal seam floor, the length of the hole cutting is 200m, the distance between the drill holes is 10m, so that the fracturing fluid can flow in a fracturing network in a penetrating mode, 19 drill holes are formed at the hole cutting position of the working face, the length of each drill hole is 60m, 6 drill holes are formed in each side of the upper crossheading and the lower crossheading, the distance between the drill holes is 15m, the lengths of the drill holes are respectively 25m, 35m, 45m, 55m, 65m, 75m and 85m, the total number of the drill holes of the two crossheadheadheadheadings is 12, and the total number of the drill holes is 31.

As shown in fig. 5 to 7, the second embodiment provides a drilling device 1, the drilling device 1 of the second embodiment is applied to the drilling and grooving work of the first embodiment, the drilling device 1 includes a drill body 11 and a cutter 12, the cutter 12 is movably connected to the drill body 11 and can be accommodated in the drill body 11, and the cutter 12 is used for grooving to form the groove 6. Specifically, the drilling tool body 11 completes drilling work through rotation, a cavity is formed in the side face of the drilling tool body 11, the cutter 12 is hinged to the cavity, the cutter 12 rotates around the hinged end serving as an axis through the driving action of a driving piece inside the drilling tool body 11, so that expansion and contraction are completed, when the drilling tool body 11 moves to a position in the hole 8 where grooving is needed, the cutter 12 extends out of the inside of the drilling tool body 11, and under the rotating action of the drilling tool body 11, the cutter 12 can complete cutting work of the groove 6 of the annular structure.

According to the embodiment, the drilling device 1 further comprises a slide rail 13 and a water spraying mechanism 14, the drill body 11 is slidably connected to the slide rail 13, and the water spraying mechanism 14 is used for spraying water when the drill body 11 performs drilling work. Specifically, the water spraying mechanism 14 comprises a liquid conveying pipe arranged on the drilling tool body 11, the output end of the liquid conveying pipe is located in the center of the drilling tool body 11, part of dust generated in the drilling process can be brought away from the hole 8 in a water flow mode by water energy, the drilling tool body 11 can be cooled and lubricated, the drilling work is more stable, the service life of the drilling tool body 11 can be prolonged, and the drilling tool body 11 can be flexibly connected to the sliding rail 13 in a sliding mode through moving the sliding rail 13.

According to the present embodiment, the liquid output device 2 comprises a water spraying pipe 21 and a second pump body, wherein an input end of the water spraying pipe 21 is communicated with a water source, an output end of the water spraying pipe 21 is used for outputting high-pressure liquid to the hole 8, and the second pump body is used for pressurizing the liquid in the water spraying pipe 21, and specifically comprises a high-pressure pump body 22. Liquid of a water source is guided to the water spraying pipeline 21 under the action of a high-pressure liquid pump and is sprayed out from the output end of the water spraying pipeline 21 in a high-pressure spraying mode, specifically, the output end of the water spraying pipeline 21 is positioned between the first blocking piece 3 and the second blocking piece 4, specifically, as shown in fig. 6-7, the first blocking piece 3 and the second blocking piece 4 are flexible capsules with a circular ring structure, the first blocking piece 3 and the second blocking piece 4 are sleeved on the water spraying pipeline 21, namely, the inner edges of the first blocking piece 3 and the second blocking piece 4 are in interference fit with the outer edge of the water spraying pipeline 21, the output end of the water spraying pipeline 21 is a through hole 211 arranged on the pipe wall of the water spraying pipeline 21, the flexible capsules are pressurized by using a manual pressure pump 5 to expand and extrude the hole wall of the drilled capsule, so as to achieve the hole sealing purpose, then the high-pressure pump body 22 is started to inject water, the water spraying pipeline 21 is tightly connected with the output end of the high-pressure pump body 22 through internal and external threads, in order to avoid water leakage and pressure relief, high-pressure water is output to a closed cavity formed by the first plugging piece 3 and the second plugging piece 4 from the through hole 211 of the water spraying pipeline 21, the high-pressure water further fractures and expands cracks in the groove 6 of the hole wall of the drilled hole which is opened in advance, and penetrates and extrudes the rock body to further form a new fracture network, so that the integrity of the thin coal seam bottom plate 7 is damaged, and the thin coal seam bottom plate 7 is easy to cut.

Specifically, in this embodiment, the drilling device 1 further includes a wind-driven mechanism, the wind-driven mechanism is connected to the drilling tool body 11, the wind-driven mechanism drives the drilling tool body 11 to reciprocate on the slide rail 13 along the axis of the hole 8 by generating wind energy, and the wind-driven mechanism generates an air flow which discharges dust generated by the drilling tool body 11 during the drilling process to the outside during the driving process, so as to facilitate the cleaning work of the inside of the hole 8.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.