CN110454207B - Anchor pumping integrated method for deep coal seam mining floor rock roadway - Google Patents
Anchor pumping integrated method for deep coal seam mining floor rock roadway Download PDFInfo
- Publication number
- CN110454207B CN110454207B CN201910824760.7A CN201910824760A CN110454207B CN 110454207 B CN110454207 B CN 110454207B CN 201910824760 A CN201910824760 A CN 201910824760A CN 110454207 B CN110454207 B CN 110454207B
- Authority
- CN
- China
- Prior art keywords
- anchor
- rod body
- anchor rod
- pumping
- hollow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000011435 rock Substances 0.000 title claims abstract description 90
- 239000003245 coal Substances 0.000 title claims abstract description 75
- 238000005086 pumping Methods 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000005065 mining Methods 0.000 title claims abstract description 17
- 238000004873 anchoring Methods 0.000 claims abstract description 64
- 238000005553 drilling Methods 0.000 claims abstract description 38
- 238000000605 extraction Methods 0.000 claims description 75
- 238000007789 sealing Methods 0.000 claims description 35
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 239000011440 grout Substances 0.000 claims description 20
- 238000001125 extrusion Methods 0.000 claims description 19
- 238000007569 slipcasting Methods 0.000 claims description 12
- 238000009933 burial Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000005728 strengthening Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 11
- 230000010354 integration Effects 0.000 description 6
- 230000002265 prevention Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000002002 slurry Substances 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The deep coal seam mining floor rock roadway anchor pumping integrated method comprises the following steps: (1) drilling: drilling in a rock roadway by using a conventional drilling machine, and drilling a plurality of drill holes; (2) inserting an anchor pumping integrated device into the drill hole, wherein a pumping section of the anchor pumping integrated device is positioned in the coal bed, and an anchoring section of the anchor pumping integrated device is positioned in the rock layer; (3) anchoring the anchor and suction integrated device in the drill hole; (4) and connecting the anchor pumping integrated device with a pumping pipeline of a gas pumping system in the rock roadway to perform gas pumping. The invention has the advantages of simple structure, convenient operation, strong reliability and low anchor drawing cost.
Description
Technical Field
The invention relates to the technical field of roadway anchoring and coal seam gas extraction, in particular to an anchoring and extraction integrated method for a rock roadway of a deep coal seam mining bottom plate.
Background
Along with the increase of the coal mining depth and strength, the danger of coal and gas outburst (hereinafter referred to as outburst) is increased, the outburst prevention technical difficulty is increased, and the mechanical properties of coal and rock under the complex environments of deep mining high ground stress, high gas and high ground temperature are different from those of a shallow part, such as the complexity and diversity of surrounding rock stress field evolution, the large deformation and strong rheological property of surrounding rock, the brittleness-ductility transformation of deep coal and rock mass, the mutation of dynamic response and the like; the protruding mechanism is more complex, and the protruding of the deep ground stress leading type coal roadway is more prominent.
At present, a single outburst coal seam has no mining protective layer, outburst prevention measures of pre-pumping coal seam gas by using a rock roadway are mainly adopted, the rock roadway is usually arranged below the coal roadway, and the inner and outer staggered flat distances of the rock roadway are generally 15-0 m. After the deep coal roadway adopts the measures, although the potential of gas outburst is reduced, the high ground stress hazard is difficult to eliminate, and ground stress dominant type outburst still occurs. In addition, national industry regulations in principle do not allow regional outburst prevention measures to be implemented in coal seams with severe outburst. The method has the advantages that the ground stress leading outburst danger cannot be eliminated by adopting a traditional method for simply extracting coal seam gas, the pressure relief and outburst prevention technology for extracting gas by combining cross-layer drilling is bound to be popularized and adopted for carrying out pressure relief on a pre-excavated rock roadway aiming at high ground stress of a deep mine and single and serious outburst prevention of a coal seam coal roadway area.
During the tunneling period of the coal bed rock layer roadway, in order to reduce the gas outburst potential to the maximum extent and eliminate the harm of high ground stress, the support and gas extraction of the rock roadway are of great importance. The process technology mainly comprises the steps of firstly tunneling, supporting, then extracting and drilling, and mainly solves the problems that the supporting process and the extracting process are not mutually coherent, the whole construction period is long, the harm of high ground stress is difficult to effectively eliminate, coal seam gas cannot be extracted in time, a drill hole is easy to collapse and deform, the closure is serious, an extracting channel is not smooth and the like, and particularly when deep mining is carried out, the problems are serious. Based on this, it is necessary to improve the support and extraction process of deep rock tunnel and improve the safety and reliability of production.
In order to solve the above problems, people are always seeking an ideal technical solution.
Disclosure of Invention
The invention aims to provide an anchor pumping integrated method for a rock roadway of a deep coal seam mining floor, which has the advantages of simple structure, convenience in operation, strong reliability and low anchor pumping cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
the deep coal seam mining floor rock roadway anchor pumping integrated method comprises the following steps:
(1) drilling: drilling in a rock roadway by using a conventional drilling machine, and drilling a plurality of drill holes;
(2) selecting a proper anchor and drainage integrated device according to three indexes of the coal seam burial depth, the coal seam gas content and the rock integrity, and inserting the selected anchor and drainage integrated device into the drill hole to enable the drainage section of the anchor and drainage integrated device to be located in the coal seam and the anchoring section of the anchor and drainage integrated device to be located in the rock layer;
(3) anchoring the anchor and suction integrated device in the drill hole;
(4) and connecting the anchor pumping integrated device with a pumping pipeline of a gas pumping system in the rock roadway to perform gas pumping.
The anchor pumping integrated device is a conical sleeve type anchor pumping integrated device, the conical sleeve type anchor pumping integrated device comprises a hollow anchor rod body, an extraction floral tube, a plurality of centralizers, hole sealing components, an anchor disc and nuts, one end of the hollow anchor rod body, which extends into a drill hole, is taken as the front end, the front end of the hollow anchor rod body is in threaded connection with the rear end of the extraction floral tube, the extraction floral tube is formed by coaxially threaded connection of a plurality of short floral tubes, the centralizers are sequentially sleeved on the extraction floral tube at equal intervals, the hole sealing components and the anchor disc are sleeved on the hollow anchor rod body, the hole sealing components are positioned on the front side of the anchor disc, and the nuts are in threaded connection with the rear side of the hollow anchor rod body and are tightly pressed on the rear side of the anchor disc;
the hole sealing component comprises a cylindrical plastic expansion sleeve, a conical plastic expansion sleeve and an extrusion expansion sleeve, the cylindrical plastic expansion sleeve, the conical plastic expansion sleeve and the extrusion expansion sleeve are concentrically sleeved on the hollow anchor rod body from front to back in sequence, the front end of the cylindrical plastic expansion sleeve is fixedly connected to the hollow anchor rod body through a hoop, an inner hole of the conical plastic expansion sleeve is in sliding connection with the outer circumference of the hollow anchor rod body, the extrusion expansion sleeve is in threaded connection with the outer circumference of the hollow anchor rod body, the outer circumference of the conical plastic expansion sleeve is thin in front and thick in back, the front end of the conical plastic expansion sleeve is inserted into the back end of the cylindrical plastic expansion sleeve, a conical jacking head with the thin front and the thick back is arranged at the front end of the extrusion expansion sleeve, the front end of the conical jacking head extends into the back end of the conical plastic expansion sleeve, the back end of the extrusion expansion sleeve is located on the front side of the front side face of the anchoring disc, and a hexagonal structure matched with a wrench in a clamping mode is arranged on the.
The step (2) is specifically as follows: the method comprises the steps of firstly, determining the lengths of an extraction perforated pipe and a hollow anchor rod body according to the drilling length of a coal seam section and the drilling length of a rock layer section, then connecting the extraction perforated pipe and the hollow anchor rod body into a whole, installing centralizers outside the extraction perforated pipe, installing a cylindrical plastic expansion sleeve, a conical plastic expansion sleeve and an extrusion expansion sleeve outside the hollow anchor rod body, then inserting the hollow anchor rod body into a drill hole, enabling the extraction perforated pipe to extend into the bottom in the drill hole, enabling the extraction perforated pipe to be located in the coal seam, and enabling the hollow anchor rod body to be located in the rock layer.
The step (3) is specifically as follows: clamping a hexagonal structure at the rear end of the extruded and expanded sleeve by using a wrench or a lengthened sleeve, rotating the extruded and expanded sleeve to enable the extruded and expanded sleeve to move forwards, pushing a conical plastic expanded sleeve to move forwards by using a conical jacking head at the front end of the extruded and expanded sleeve, extruding the conical plastic expanded sleeve into a cylindrical plastic expanded sleeve forwards while expanding the periphery of the conical plastic expanded sleeve outwards, expanding the cylindrical plastic expanded sleeve, and pressing and attaching the outer side wall of the expanded cylindrical plastic expanded sleeve and the expanded conical plastic expanded sleeve to the inner wall of a drilled hole of a rock layer section so as to plug the drilled hole and position the hollow anchor rod body, thereby achieving the effect of double sealing and positioning; then, sequentially installing the anchoring disc and the nut on the rear side part of the hollow anchor rod body, screwing the nut to push the anchoring disc to move the anchoring disc forwards, covering the port of the drilled hole by the anchoring disc and pressing the anchoring disc on the inner wall of the rock roadway, thus realizing anchoring and hole sealing;
the step (4) is specifically as follows: and connecting the rear end of the hollow anchor rod body with an extraction pipeline of a gas extraction system, thereby performing gas extraction.
The anchor pumping integrated device is a hollow grouting type anchor pumping integrated device, the hollow grouting type anchor pumping integrated device comprises a hollow anchor rod body, a pumping perforated pipe, a plurality of centralizers, a steel shell expanding anchor head, a hole sealing component, an anchoring disc and a nut, the end of a hollow anchor rod body extending into the drill hole is taken as the front end, the hollow anchor rod body is formed by coaxially connecting a plurality of short hollow anchor rods through threads, an extraction flower pipe is formed by coaxially connecting a plurality of short flower pipes through threads, centralizers are sequentially sleeved on the extraction flower pipe and the hollow anchor rod body at equal intervals, a steel expansion shell anchor head is of a conical shell structure with a thin front part and a thick rear part and an open rear end, the steel expansion shell anchor head is fixedly arranged on the outer circumference of the front side part of the hollow anchor rod body concentrically, a hole sealing component and an anchor disc are sleeved on the hollow anchor rod body, the hole sealing component is positioned on the front side of the front side surface of the anchor disc, and a nut is in threaded connection with the rear side part of the hollow anchor rod body and is tightly pressed on the rear side surface of the;
the hole sealing subassembly includes only thick liquid stopper and slip casting pipe, only the outer circumference of thick circular cone structure after thin in the front of the thick, only thick liquid stopper suit is on the cavity stock body, only thick liquid stopper and the outer circumference sliding connection of cavity stock body, it is internal that the slip casting pipe inserts the cavity stock through the rear end of cavity stock body along fore-and-aft direction, the inner wall fixed connection of slip casting pipe and cavity stock body, set up the mounting hole that is located only thick liquid stopper front side on the lateral wall of cavity stock body, the front end of slip casting pipe passes the mounting hole and stretches out the cavity stock body, the rear side portion of slip casting pipe stretches out the rear end of cavity stock body, the back lateral part of slip casting pipe is installed and is spilled over the valve.
The step (2) is specifically as follows: the method comprises the steps of firstly determining the lengths of an extraction perforated pipe and a hollow anchor rod body according to the drilling length of a coal seam section and the drilling length of a rock seam section, then connecting the extraction perforated pipe and the hollow anchor rod body into a whole, installing centralizers outside the extraction perforated pipe and the hollow anchor rod body, installing a steel expansion shell anchor head outside the front side part of the hollow anchor rod body, then inserting the steel expansion shell anchor head into a drill hole, enabling the extraction perforated pipe to extend into the bottom in the drill hole, enabling the extraction perforated pipe to be located in the coal seam, enabling the hollow anchor rod body to be located in a rock layer, and placing the steel expansion shell anchor head into a rock seam section drill hole close to the junction of the rock layer and the coal seam.
The step (3) is specifically as follows: sequentially installing a grout stop plug, an anchoring disc and a nut on a hollow anchor rod body, then reversely rotating or outwards pulling the hollow anchor rod body to enable a steel expansion shell anchor head to expand to clamp the inner wall of a drill hole so as to position the hollow anchor rod body, enabling the grout stop plug to be blocked at the port of the drill hole, screwing the nut to push the anchoring disc to enable the anchoring disc to move forwards, covering the port of the drill hole by the anchoring disc and tightly pressing the anchoring disc on the inner wall of a rock roadway, then connecting a grouting pipe and a grouting pump through a grout outlet pipe, opening an overflow valve, starting the grouting pump to perform grouting, continuing grouting for 2-3min when the grouting pressure reaches the designed pressure, then closing the overflow valve and the grouting pump, separating the grout outlet pipe and the grouting pipe to finish grouting, thus, drilling holes in rock intervals are full of grout, and after the grout is solidified, blocking the drill holes and strengthening anchoring;
the step (4) is specifically as follows: and connecting the rear end of the hollow anchor rod body with an extraction pipeline of a gas extraction system, thereby performing gas extraction.
Compared with the prior art, the invention has prominent substantive characteristics and remarkable progress, in particular:
(1) according to the invention, the hollow anchor rod body and the extraction perforated pipe are connected into a whole, so that the integration of anchoring reinforcement of the rock tunnel and coal bed gas extraction is realized, the cost is saved, the safety and reliability are improved, the anchoring strength of the rock tunnel is effectively improved, and the hole sealing tightness of the drilled hole is increased.
(2) The invention designs two anchor and pull integrated devices: the conical sleeve type anchor pumping integrated device and the hollow grouting type anchor pumping integrated device meet anchoring and gas pumping of rock roadways under different conditions.
(3) The invention provides a method for selecting an anchor pumping process by taking three indexes of coal seam burial depth, coal seam gas content and rock integrity as the basis, so that engineering operation is targeted;
conical sleeve type anchor and pull integrated deviceIs suitable for coal seam with buried depth less than 600m and coal seam gas content less than 10 m3The completeness of the floor rock body and the conical sleeve type anchor pumping integrated device is a complete or complete and simultaneously established objective condition, the strength of the floor rock body of the coal seam is strengthened, meanwhile, hole sealing is carried out on a gas extraction drill hole, the conical sleeve type anchor pumping integrated device can be repeatedly used, and the cost is reduced;
the hollow grouting type anchor pumping integrated device is suitable for the coal seam burial depth of more than or equal to 600m and the coal seam gas content of more than or equal to 10 m3The strength of the broken bottom plate can be enhanced, a good extraction drilling hole sealing effect can be achieved, the stress resistance of the drilling hole is improved under the combined action of a sealing material (slurry) and an anchoring section rigid material, the deformation and hole collapse of the drilling hole are avoided, the stability of the extraction drilling hole is ensured, and the smoothness of a gas flow channel in the hole is ensured.
(4) The anchor is taken out the integration and has prolonged the anchor length of anchor section, has increaseed anchor section and has born the stress length, has effectively alleviated stress concentration, has strengthened the shear strength of anchor, has increased the stability of rock layer.
(5) The invention determines the distance between adjacent drill holes according to the coal seam gas content, the gas extraction radius, the integrity degree of the coal seam rock mass and the like, can adjust the lengths of the anchoring section and the extraction section according to the actual drill hole length, and increases the practicability and the adaptability of the invention.
The invention has the advantages of simple structure, convenient operation, strong reliability and low anchor drawing cost.
Drawings
Fig. 1 is a schematic structural view of an anchor and suction integrated device in embodiment 1 of the present invention.
Fig. 2 is a schematic view of the installation of the anchor and suction integrated device in the borehole in embodiment 1 of the present invention.
Fig. 3 is a schematic view of anchoring and hole sealing of the anchoring and pumping integrated device in embodiment 1 of the present invention.
Fig. 4 is a schematic structural view of an anchor and suction integrated device in embodiment 2 of the present invention.
Fig. 5 is a partially enlarged view of a portion a in fig. 4.
Fig. 6 is a schematic view of the installation of the anchor and suction integrated device in the borehole in embodiment 2 of the present invention.
Fig. 7 is a schematic view of anchoring and hole sealing of the anchoring and pumping integrated device in embodiment 2 of the present invention.
Detailed Description
The embodiments of the present invention are further described below with reference to the drawings.
Example 1
As shown in fig. 1-3, the deep coal seam mining floor rock roadway anchoring and pumping integrated method comprises the following steps:
(1) drilling: drilling in a rock roadway 1 by using a conventional drilling machine, and drilling a plurality of drill holes 2;
(2) selecting a proper anchor and drainage integrated device according to three indexes of the coal seam burial depth, the coal seam gas content and the rock integrity, and inserting the selected anchor and drainage integrated device into the drill hole 2, so that the drainage section of the anchor and drainage integrated device is positioned in the coal seam 3, and the anchoring section of the anchor and drainage integrated device is positioned in the rock layer 4;
(3) anchoring the anchor and suction integrated device in the drill hole 2;
(4) and connecting the anchor pumping integrated device with a pumping pipeline of a gas pumping system in the rock roadway 1 to perform gas pumping.
The anchor pumping integrated device comprises a hollow anchor rod body 5, a pumping flower pipe 6, a plurality of centralizers 7, hole sealing assemblies, an anchor disc 8 and a nut 9, wherein one end of the hollow anchor rod body 5 extending into a drill hole 2 is taken as the front end, the front end of the hollow anchor rod body 5 is in threaded connection with the rear end of the pumping flower pipe 6, the pumping flower pipe 6 is formed by coaxially threaded connection of a plurality of short flower pipes, the centralizers 7 are sequentially sleeved on the pumping flower pipe 6 at equal intervals, the hole sealing assemblies and the anchor disc 8 are sleeved on the hollow anchor rod body 5, the hole sealing assemblies are positioned on the front side of the front side face of the anchor disc 8, and the nut 9 is in threaded connection with the rear side of the hollow anchor rod body 5 and tightly pressed on the rear side face of the anchor disc 8;
the hole sealing component comprises a cylindrical plastic expansion sleeve 10, a conical plastic expansion sleeve 11 and an extrusion expansion sleeve 12, wherein the cylindrical plastic expansion sleeve 10, the conical plastic expansion sleeve 11 and the extrusion expansion sleeve 12 are sequentially sleeved on the hollow anchor rod body 5 from front to back in a concentric manner, the front end of the cylindrical plastic expansion sleeve 10 is fixedly connected to the hollow anchor rod body 5 through a hoop 19, an inner hole of the conical plastic expansion sleeve 11 is in sliding connection with the outer circumference of the hollow anchor rod body 5, the extrusion expansion sleeve 12 is in threaded connection with the outer circumference of the hollow anchor rod body 5, the outer circumference of the conical plastic expansion sleeve 11 is thin in front and thick in back, the front end of the conical plastic expansion sleeve 11 is inserted into the back end of the cylindrical plastic expansion sleeve 10, the front end of the extrusion expansion sleeve 12 is provided with a conical jacking head 20 which is thin in front and thick in back, the front end of the conical jacking head 20 extends into the back end of the conical plastic expansion sleeve 11, and the back end of the extrusion expansion sleeve 12 is positioned on the front, the periphery of the rear end of the extruded sleeve 12 is provided with a hexagonal structure which is clamped and matched with a wrench.
The step (2) is specifically as follows: firstly, determining the lengths of an extraction perforated pipe 6 and a hollow anchor rod body 5 according to the length of a drilled hole 2 of a coal seam 3 section and the length of a drilled hole 2 of a rock seam 4 section, then connecting the extraction perforated pipe 6 and the hollow anchor rod body 5 into a whole, installing centralizers 7 outside the extraction perforated pipe 6 (the centralizers 7 can be welded on the extraction perforated pipe 6), installing a cylindrical plastic expansion sleeve 10, a conical plastic expansion sleeve 11 and an extrusion expansion sleeve 12 outside the hollow anchor rod body 5 and then inserting the cylindrical plastic expansion sleeve, the conical plastic expansion sleeve and the extrusion expansion sleeve into the drilled hole 2, enabling the extraction perforated pipe 6 to extend into the inner bottom of the drilled hole 2, enabling the extraction perforated pipe 6 to be located in the coal seam 3 and the hollow anchor rod body 5 to be located in the rock seam 4.
The step (3) is specifically as follows: a wrench or a lengthened sleeve is used for clamping a hexagonal structure at the rear end of the extruded sleeve 12, the extruded sleeve 12 is rotated to move forwards, a conical jacking head 20 at the front end of the extruded sleeve 12 pushes a conical plastic expansion sleeve 11 to move forwards, the conical plastic expansion sleeve 11 is extruded forwards into a cylindrical plastic expansion sleeve 10 while the periphery of the conical plastic expansion sleeve 11 expands outwards, the cylindrical plastic expansion sleeve 10 is expanded, the outer side wall of the expanded cylindrical plastic expansion sleeve 10 and the expanded conical plastic expansion sleeve 11 is tightly pressed and attached to the inner wall of a drill hole 2 at the section 4 of the rock layer, so that the drill hole 2 is blocked, the hollow anchor rod body 5 is positioned, and the effect of double sealing and positioning is achieved; then, an anchoring disc 8 and a nut 9 are sequentially arranged on the rear side part of the hollow anchor rod body 5, the nut 9 is screwed to push the anchoring disc 8, so that the anchoring disc 8 moves forwards, the anchoring disc 8 covers the port of the drill hole 2 and is tightly pressed on the inner wall of the rock roadway 1, and anchoring and hole sealing are realized;
the step (4) is specifically as follows: and connecting the rear end of the hollow anchor rod body 5 with an extraction pipeline of a gas extraction system, thereby performing gas extraction.
The drilling machine, the gas extraction system, the extraction pipeline and the anchor ear 19 are all conventional components, and specific structures and working principles are not repeated.
Example 2
As shown in fig. 4 to 7, the difference from embodiment 1 is: the anchor pumping integrated device of the embodiment is a hollow grouting type anchor pumping integrated device, the hollow grouting type anchor pumping integrated device comprises a hollow anchor rod body 5, a pumping and extracting flower pipe 6, a plurality of centralizers 7, a steel expanding shell anchor head 13, a hole sealing assembly, an anchor disc 8 and a nut 9, one end of the hollow anchor rod body 5 extending into a drill hole 2 is taken as the front end, the hollow anchor rod body 5 is formed by coaxially connecting a plurality of short hollow anchor rods through screw threads, the pumping and extracting flower pipe 6 is formed by coaxially connecting a plurality of short flower pipes through screw threads, the centralizers 7 are sequentially sleeved on the pumping and extracting flower pipe 6 and the hollow anchor rod body 5 at equal intervals, the steel expanding shell anchor head 13 is of a conical shell structure with a thin front part and a thick rear part and an open end, the steel expanding shell anchor head 13 is fixedly arranged on the front outer circumferential side part of the hollow anchor rod body 5 at the same center, the hole sealing assembly and the anchor disc 8 are sleeved on the hollow anchor rod body 5, the hole sealing assembly is positioned on the front side of the anchoring disc 8, and the nut 9 is in threaded connection with the rear side of the hollow anchor rod body 5 and is tightly pressed on the rear side of the anchoring disc 8;
the hole sealing assembly comprises a grout stop plug 14 and a grouting pipe 15, the outer circumference of the grout stop plug 14 is of a conical structure with a thin front part and a thick rear part, the grout stop plug 14 is sleeved on the hollow anchor rod body 5, the grout stop plug 14 is in sliding connection with the outer circumference of the hollow anchor rod body 5, the grouting pipe 15 is inserted into the hollow anchor rod body 5 through the rear end of the hollow anchor rod body 5 along the front-rear direction, the grouting pipe 15 is fixedly connected with the inner wall of the hollow anchor rod body 5, a mounting hole located on the front side of the grout stop plug 14 is formed in the side wall of the hollow anchor rod body 5, the front end of the grouting pipe 15 penetrates through the mounting hole to extend out of the hollow anchor rod body 5, the rear side part of the grouting pipe 15 extends out of the rear end of the hollow anchor rod body 5, and an overflow.
The step (2) is specifically as follows: firstly, determining the lengths of an extraction perforated pipe 6 and a hollow anchor rod body 5 according to the length of a drilled hole 2 of a coal seam section 3 and the length of a drilled hole 2 of a rock seam section 4, then connecting the extraction perforated pipe 6 and the hollow anchor rod body 5 into a whole, installing centralizers 7 outside the extraction perforated pipe 6 and the hollow anchor rod body 5, installing a steel expansion shell anchor head 13 outside the front side part of the hollow anchor rod body 5 and then inserting the steel expansion shell anchor head into the drilled hole 2, enabling the extraction perforated pipe 6 to extend into the bottom of the drilled hole 2 and be located in the coal seam 3, enabling the extraction perforated pipe 6 to be located in the rock seam 4, and placing the hollow anchor rod body 5 in the rock seam section 4 and the steel expansion shell anchor head 13 in the drilled hole 2 of the rock seam section 4 and the junction of the coal seam 3.
The step (3) is specifically as follows: the grout stop plug 14, the anchoring disc 8 and the nut 9 are sequentially arranged at the rear side part of the hollow anchor rod body 5, then the hollow anchor rod body 5 is reversely rotated or pulled outwards, so that the steel expansion shell anchor head 13 is expanded to clamp the inner wall of the drill hole 2, thereby positioning the hollow anchor rod body 5, plugging the end opening of the drill hole 2 by the grout stop plug 14, screwing the nut 9 to push the anchoring disc 8 to lead the anchoring disc 8 to move forwards, covering the end opening of the drill hole 2 by the anchoring disc 8 and pressing the anchoring disc on the inner wall of the rock roadway 1, then connecting the grouting pipe 15 with the grouting pump 17 through the grout outlet pipe 18, opening the overflow valve 16, starting the grouting pump 17 to perform grouting, continuing grouting for 2-3min when the grouting pressure reaches the design pressure, then the overflow valve 16 and the grouting pump 17 are closed, the slurry outlet pipe 18 and the grouting pipe 15 are separated, grouting is completed, therefore, the drill holes 2 of the 4 sections of the rock stratum are filled with the slurry, and the drill holes 2 are plugged and the anchoring is strengthened after the slurry is solidified;
the step (4) is specifically as follows: and connecting the rear end of the hollow anchor rod body 5 with an extraction pipeline of a gas extraction system, thereby performing gas extraction.
The diameter of the drill hole 2 can be phi 42mm, phi 50mm, phi 75mm, phi 94mm, phi 112mm, phi 120mm and the like, and in order to enhance the anchoring effect of the rock roadway 1, a small-diameter drill hole is generally adopted, and the drilling with phi 42mm and phi 50mm is mainly adopted. The distance between the adjacent drill holes 2 is determined by the coal seam gas content, the gas extraction radius, the rock integrity and the like, if the rock is broken seriously, the drill holes 2 can be encrypted, the rock roadway 1 is anchored and supported in a reinforcing mode, and meanwhile, the gas in the coal seam 3 is extracted in a reinforcing mode.
The invention takes three indexes of the coal seam burial depth, the coal seam gas content and the rock integrity as the basis for selecting the anchor pumping process, so that the engineering operation is directed, and the three indexes are specifically shown in tables 1 and 2:
TABLE 1 Anchor and suction integrated device and method selection basis
TABLE 2 qualitative Classification of rock integrity
According to experience, the anchor and drainage integration method in the embodiment 1 is selected only when three indexes of the coal seam burial depth, the coal seam gas content and the rock integrity simultaneously meet the anchor and drainage integration method in the embodiment 1, and the anchor and drainage integration method in the embodiment 2 is selected only when any one of the three indexes of the coal seam burial depth, the coal seam gas content and the rock integrity meets the anchor and drainage integration method in the embodiment 2.
The above embodiments are merely to illustrate rather than to limit the technical solutions of the present invention, and although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that; modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.
Claims (6)
1. The deep coal seam mining floor rock roadway anchor pumping integrated method is characterized in that: the method comprises the following steps:
(1) drilling: drilling in a rock roadway by using a conventional drilling machine, and drilling a plurality of drill holes;
(2) selecting a proper anchor and drainage integrated device according to three indexes of the coal seam burial depth, the coal seam gas content and the rock integrity, and inserting the selected anchor and drainage integrated device into the drill hole to enable the drainage section of the anchor and drainage integrated device to be located in the coal seam and the anchoring section of the anchor and drainage integrated device to be located in the rock layer;
(3) anchoring the anchor and suction integrated device in the drill hole;
(4) connecting the anchor pumping integrated device with a pumping pipeline of a gas pumping system in a rock roadway to perform gas pumping;
the anchor pumping integrated device is a conical sleeve type anchor pumping integrated device, the conical sleeve type anchor pumping integrated device comprises a hollow anchor rod body, an extraction floral tube, a plurality of centralizers, hole sealing components, an anchor disc and nuts, one end of the hollow anchor rod body, which extends into a drill hole, is taken as the front end, the front end of the hollow anchor rod body is in threaded connection with the rear end of the extraction floral tube, the extraction floral tube is formed by coaxially threaded connection of a plurality of short floral tubes, the centralizers are sequentially sleeved on the extraction floral tube at equal intervals, the hole sealing components and the anchor disc are sleeved on the hollow anchor rod body, the hole sealing components are positioned on the front side of the anchor disc, and the nuts are in threaded connection with the rear side of the hollow anchor rod body and are tightly pressed on the rear side of the anchor disc;
the hole sealing component comprises a cylindrical plastic expansion sleeve, a conical plastic expansion sleeve and an extrusion expansion sleeve, the cylindrical plastic expansion sleeve, the conical plastic expansion sleeve and the extrusion expansion sleeve are concentrically sleeved on the hollow anchor rod body from front to back in sequence, the front end of the cylindrical plastic expansion sleeve is fixedly connected to the hollow anchor rod body through a hoop, an inner hole of the conical plastic expansion sleeve is in sliding connection with the outer circumference of the hollow anchor rod body, the extrusion expansion sleeve is in threaded connection with the outer circumference of the hollow anchor rod body, the outer circumference of the conical plastic expansion sleeve is thin in front and thick in back, the front end of the conical plastic expansion sleeve is inserted into the back end of the cylindrical plastic expansion sleeve, a conical jacking head with the thin front and the thick back is arranged at the front end of the extrusion expansion sleeve, the front end of the conical jacking head extends into the back end of the conical plastic expansion sleeve, the back end of the extrusion expansion sleeve is located on the front side of the front side face of the anchoring disc, and a hexagonal structure matched with a wrench in a clamping mode is arranged on the.
2. The rock roadway deep coal seam mining floor rock roadway anchor pumping integrated method of claim 1, characterized in that: the step (2) is specifically as follows: the method comprises the steps of firstly, determining the lengths of an extraction perforated pipe and a hollow anchor rod body according to the drilling length of a coal seam section and the drilling length of a rock layer section, then connecting the extraction perforated pipe and the hollow anchor rod body into a whole, installing centralizers outside the extraction perforated pipe, installing a cylindrical plastic expansion sleeve, a conical plastic expansion sleeve and an extrusion expansion sleeve outside the hollow anchor rod body, then inserting the hollow anchor rod body into a drill hole, enabling the extraction perforated pipe to extend into the bottom in the drill hole, enabling the extraction perforated pipe to be located in the coal seam, and enabling the hollow anchor rod body to be located in the rock layer.
3. The deep coal seam mining floor rock roadway anchor pumping integrated method of claim 2, characterized in that: the step (3) is specifically as follows: clamping a hexagonal structure at the rear end of the extruded and expanded sleeve by using a wrench or a lengthened sleeve, rotating the extruded and expanded sleeve to enable the extruded and expanded sleeve to move forwards, pushing a conical plastic expanded sleeve to move forwards by using a conical jacking head at the front end of the extruded and expanded sleeve, extruding the conical plastic expanded sleeve into a cylindrical plastic expanded sleeve forwards while expanding the periphery of the conical plastic expanded sleeve outwards, expanding the cylindrical plastic expanded sleeve, and pressing and attaching the outer side wall of the expanded cylindrical plastic expanded sleeve and the expanded conical plastic expanded sleeve to the inner wall of a drilled hole of a rock layer section so as to plug the drilled hole and position the hollow anchor rod body, thereby achieving the effect of double sealing and positioning; then, sequentially installing the anchoring disc and the nut on the rear side part of the hollow anchor rod body, screwing the nut to push the anchoring disc to move the anchoring disc forwards, covering the port of the drilled hole by the anchoring disc and pressing the anchoring disc on the inner wall of the rock roadway, thus realizing anchoring and hole sealing;
the step (4) is specifically as follows: and connecting the rear end of the hollow anchor rod body with an extraction pipeline of a gas extraction system, thereby performing gas extraction.
4. The deep coal seam mining floor rock roadway anchor pumping integrated method is characterized in that: the method comprises the following steps:
(1) drilling: drilling in a rock roadway by using a conventional drilling machine, and drilling a plurality of drill holes;
(2) selecting a proper anchor and drainage integrated device according to three indexes of the coal seam burial depth, the coal seam gas content and the rock integrity, and inserting the selected anchor and drainage integrated device into the drill hole to enable the drainage section of the anchor and drainage integrated device to be located in the coal seam and the anchoring section of the anchor and drainage integrated device to be located in the rock layer;
(3) anchoring the anchor and suction integrated device in the drill hole;
(4) connecting the anchor pumping integrated device with a pumping pipeline of a gas pumping system in a rock roadway to perform gas pumping;
the anchor pumping integrated device is a hollow grouting type anchor pumping integrated device, the hollow grouting type anchor pumping integrated device comprises a hollow anchor rod body, a pumping perforated pipe, a plurality of centralizers, a steel shell expanding anchor head, a hole sealing component, an anchoring disc and a nut, the end of a hollow anchor rod body extending into the drill hole is taken as the front end, the hollow anchor rod body is formed by coaxially connecting a plurality of short hollow anchor rods through threads, an extraction flower pipe is formed by coaxially connecting a plurality of short flower pipes through threads, centralizers are sequentially sleeved on the extraction flower pipe and the hollow anchor rod body at equal intervals, a steel expansion shell anchor head is of a conical shell structure with a thin front part and a thick rear part and an open rear end, the steel expansion shell anchor head is fixedly arranged on the outer circumference of the front side part of the hollow anchor rod body concentrically, a hole sealing component and an anchor disc are sleeved on the hollow anchor rod body, the hole sealing component is positioned on the front side of the front side surface of the anchor disc, and a nut is in threaded connection with the rear side part of the hollow anchor rod body and is tightly pressed on the rear side surface of the;
the hole sealing subassembly includes only thick liquid stopper and slip casting pipe, only the outer circumference of thick circular cone structure after thin in the front of the thick, only thick liquid stopper suit is on the cavity stock body, only thick liquid stopper and the outer circumference sliding connection of cavity stock body, it is internal that the slip casting pipe inserts the cavity stock through the rear end of cavity stock body along fore-and-aft direction, the inner wall fixed connection of slip casting pipe and cavity stock body, set up the mounting hole that is located only thick liquid stopper front side on the lateral wall of cavity stock body, the front end of slip casting pipe passes the mounting hole and stretches out the cavity stock body, the rear side portion of slip casting pipe stretches out the rear end of cavity stock body, the back lateral part of slip casting pipe is installed and is spilled over the valve.
5. The deep coal seam mining floor rock roadway anchor pumping integrated method of claim 4, characterized in that: the step (2) is specifically as follows: the method comprises the steps of firstly determining the lengths of an extraction perforated pipe and a hollow anchor rod body according to the drilling length of a coal seam section and the drilling length of a rock seam section, then connecting the extraction perforated pipe and the hollow anchor rod body into a whole, installing centralizers outside the extraction perforated pipe and the hollow anchor rod body, installing a steel expansion shell anchor head outside the front side part of the hollow anchor rod body, then inserting the steel expansion shell anchor head into a drill hole, enabling the extraction perforated pipe to extend into the bottom in the drill hole, enabling the extraction perforated pipe to be located in the coal seam, enabling the hollow anchor rod body to be located in a rock layer, and placing the steel expansion shell anchor head into a rock seam section drill hole close to the junction of the rock layer and the coal seam.
6. The deep coal seam mining floor rock roadway anchor pumping integrated method of claim 5, characterized in that: the step (3) is specifically as follows: sequentially installing a grout stop plug, an anchoring disc and a nut on a hollow anchor rod body, then reversely rotating or outwards pulling the hollow anchor rod body to enable a steel expansion shell anchor head to expand to clamp the inner wall of a drill hole so as to position the hollow anchor rod body, enabling the grout stop plug to be blocked at the port of the drill hole, screwing the nut to push the anchoring disc to enable the anchoring disc to move forwards, covering the port of the drill hole by the anchoring disc and tightly pressing the anchoring disc on the inner wall of a rock roadway, then connecting a grouting pipe and a grouting pump through a grout outlet pipe, opening an overflow valve, starting the grouting pump to perform grouting, continuing grouting for 2-3min when the grouting pressure reaches the designed pressure, then closing the overflow valve and the grouting pump, separating the grout outlet pipe and the grouting pipe to finish grouting, thus, drilling holes in rock intervals are full of grout, and after the grout is solidified, blocking the drill holes and strengthening anchoring;
the step (4) is specifically as follows: and connecting the rear end of the hollow anchor rod body with an extraction pipeline of a gas extraction system, thereby performing gas extraction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910824760.7A CN110454207B (en) | 2019-09-02 | 2019-09-02 | Anchor pumping integrated method for deep coal seam mining floor rock roadway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910824760.7A CN110454207B (en) | 2019-09-02 | 2019-09-02 | Anchor pumping integrated method for deep coal seam mining floor rock roadway |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110454207A CN110454207A (en) | 2019-11-15 |
| CN110454207B true CN110454207B (en) | 2020-11-13 |
Family
ID=68490425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910824760.7A Active CN110454207B (en) | 2019-09-02 | 2019-09-02 | Anchor pumping integrated method for deep coal seam mining floor rock roadway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110454207B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250725B (en) * | 2021-06-09 | 2022-05-17 | 中国电建集团成都勘测设计研究院有限公司 | Expansion anchor cable and anchor rod supporting method |
| CN113969798B (en) * | 2021-09-08 | 2023-09-26 | 齐鲁理工学院 | Anchoring device for supporting roof of coal mine tunnel |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201650344U (en) * | 2010-03-05 | 2010-11-24 | 中煤国际工程集团武汉设计研究院 | Plastic expanding shell anchor bar for gas drainage |
| CN204663566U (en) * | 2015-06-02 | 2015-09-23 | 山西潞安环保能源开发股份有限公司常村煤矿 | Bolt gas pumping device |
| CN205349295U (en) * | 2016-02-03 | 2016-06-29 | 安徽理工大学 | Gas drainage under suction hole packer |
| CN205778989U (en) * | 2016-05-19 | 2016-12-07 | 中交一公局第五工程有限公司 | Drawing-off gas structure is used in the construction of a kind of Tunnel Passing coal seam |
| CN107355253A (en) * | 2017-08-28 | 2017-11-17 | 湖南科技大学 | A kind of anchor rod system and pumping method for being used for gas pumping and hydrofracturing |
| CN208073544U (en) * | 2018-04-18 | 2018-11-09 | 河南理工大学 | A kind of bladder-type anchor pole gas pumping device |
| CN109209455A (en) * | 2018-09-26 | 2019-01-15 | 浙江普泰克金属制品有限公司 | A kind of expansion shell type prestressing force hollow grouting anchor with plasma resistance plug |
-
2019
- 2019-09-02 CN CN201910824760.7A patent/CN110454207B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201650344U (en) * | 2010-03-05 | 2010-11-24 | 中煤国际工程集团武汉设计研究院 | Plastic expanding shell anchor bar for gas drainage |
| CN204663566U (en) * | 2015-06-02 | 2015-09-23 | 山西潞安环保能源开发股份有限公司常村煤矿 | Bolt gas pumping device |
| CN205349295U (en) * | 2016-02-03 | 2016-06-29 | 安徽理工大学 | Gas drainage under suction hole packer |
| CN205778989U (en) * | 2016-05-19 | 2016-12-07 | 中交一公局第五工程有限公司 | Drawing-off gas structure is used in the construction of a kind of Tunnel Passing coal seam |
| CN107355253A (en) * | 2017-08-28 | 2017-11-17 | 湖南科技大学 | A kind of anchor rod system and pumping method for being used for gas pumping and hydrofracturing |
| CN208073544U (en) * | 2018-04-18 | 2018-11-09 | 河南理工大学 | A kind of bladder-type anchor pole gas pumping device |
| CN109209455A (en) * | 2018-09-26 | 2019-01-15 | 浙江普泰克金属制品有限公司 | A kind of expansion shell type prestressing force hollow grouting anchor with plasma resistance plug |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110454207A (en) | 2019-11-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102071921B (en) | Underground drilling and fracturing-integrated staged fracturing device and gas drainage process | |
| CN102575512B (en) | Expandable liner tieback connection | |
| CN110454207B (en) | Anchor pumping integrated method for deep coal seam mining floor rock roadway | |
| CN106050199B (en) | Comprehensive drainage gas production device and method | |
| CN112647877B (en) | Soft coal seam branch drilling and pipe lowering guiding device and efficient extraction method | |
| CN110344784B (en) | Water inrush treatment device for mine nearly horizontal directional drilling | |
| CN105649655B (en) | Be used for following shield structure built-in toward peripheral stratum slip casting reinforcing apparatus | |
| CN101403280A (en) | Six-stage branch well branching manufacturing and branching system tool | |
| CN108798590A (en) | A kind of down-hole coal bed water filling hole sealing device | |
| CN103089180A (en) | Casing sidetracked well completion method using expansion screen tube | |
| CN107023259B (en) | A kind of well system based on double-wall drill pipe | |
| CN202300266U (en) | Operation device for expansion casing with equal borehole diameter | |
| CN112854194B (en) | Device for retreating type grouting and using method | |
| CN210440061U (en) | Hollow grouting type anchor pumping integrated device | |
| CN210264776U (en) | Self-sealing type anchor cable for sectional grouting | |
| CN201412099Y (en) | Expansible sleeve assistance mechanism for safe expansion | |
| CN210440063U (en) | Conical sleeve type anchor and pull integrated device | |
| CN207145780U (en) | A kind of modified colliery leting speeper water jacket tube apparatus | |
| CN203248074U (en) | Sidetracking well casing windowing whipstock | |
| US8376058B2 (en) | Well drilling wash down end cap and method | |
| JP4044542B2 (en) | Well apparatus with fluid injection / recovery function and installation method of the well apparatus | |
| CN213540323U (en) | Orifice closing device for drilling and grouting | |
| CN205823252U (en) | Comprehensive draining gas producing device | |
| CN201753590U (en) | Hydraulic pulling type packing release tool | |
| CN207033381U (en) | A kind of special anchor of open hole well sidetracking |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Liu Xiao Inventor after: Xing Baolin Inventor after: Xuan Dequan Inventor after: Liu Xiaomin Inventor after: Jing Tianxiang Inventor after: Ni Xiaoming Inventor after: Han Ying Inventor after: Li Dingqi Inventor after: Lin Haixiao Inventor after: Li Yong Inventor before: Liu Xiao Inventor before: Jing Tianxiang Inventor before: Ni Xiaoming Inventor before: Han Ying Inventor before: Li Dingqi Inventor before: Lin Haixiao Inventor before: Li Yong Inventor before: Xing Baolin |
|
| CB03 | Change of inventor or designer information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |