Abrégé

2 is compressed by means of the multi-stage impact, more fracture networks are formed on the coal seam around the borehole under the guiding action of the slots and the fractures, thereby enhancing the borehole-based efficient gas extraction.

Classes IPC  ?

• E21B 43/26 - Procédés pour activer la production par formation de crevasses ou de fractures
• E21B 43/247 - Combustion sur place en association avec des procédés de fracturation
• E21B 43/00 - Procédés ou dispositifs pour l'extraction de pétrole, de gaz, d'eau ou de matériaux solubles ou fusibles ou d'une suspension de matières minérales à partir de puits
• E21B 43/16 - Procédés de récupération assistée pour l'extraction d'hydrocarbures

Abrégé

A dust suction hood includes a tapered outer cover, a cylindrical outer cover, a tapered inner baffle plate disposed in the tapered outer cover, and a first blocking member matched with an opening in the other end of the cylindrical outer cover. A top opening of the tapered outer cover is matched with an opening in one end of the cylindrical outer cover. A side wall opening of the cylindrical outer cover serves as a dust outlet. A first gap is formed in the tapered outer cover. A first dust suction port is formed between bottom openings of the tapered inner baffle plate and the tapered outer cover. A first drill pipe connecting port is formed in the first blocking member. A drill pipe of the mine drill passes through the first drill pipe connecting port to penetrate the dust suction hood on the drill pipe.

Classes IPC  ?

• E21B 21/015 - Moyens en prise avec l'entrée du trou, p. ex. hottes d'aspiration de la poussière
• E21F 5/20 - Enlèvement ou abattage de la poussière
• E21B 21/01 - Dispositions pour manipuler les fluides de forage ou les déblais à l'extérieur du trou de forage, p. ex. réservoirs à boue

Abrégé

An integrated hole sealing, device includes a capsule plug, an outer capsule having a first hole site, an inner capsule having a second hole site, a capsule water injection pipe, a borehole water injection pipe and a tapered plug. Two ends of the outer capsule and the inner capsule are respectively fixed on the capsule plug and the tapered plug. The capsule plug, the tapered plug, the outer capsule and the inner capsule form a closed hollow cylindrical cavity. A middle part of the inner capsule is a hollow pipeline, and two ends thereof respectively correspond to the first and second hole sites. The borehole water injection pipe passes through the hollow cylindrical cavity. A part, located in the hollow cylindrical cavity, of the borehole water injection pipe is telescopically wound outside the inner capsule. The capsule water injection pipe passes through the capsule plug and extends into the hollow cylindrical cavity.

Classes IPC  ?

• F42D 1/18 - Bouchons pour le bourrage
• E21B 33/127 - PackersBouchons à manchon gonflable
• E21B 34/06 - Aménagements des vannes pour les trous de forage ou pour les puits dans les puits
• E21C 37/00 - Autres procédés ou dispositifs d'abattage avec ou sans chargement

Abrégé

2 is injected into a drill hole by a heat injection and gas injection extracting pipe and by a high-pressure gas cylinder and a reducing valve, then a certain amount of methane and dry air are injected into a high-temperature and high-pressure combustion chamber by the high-pressure gas cylinder and the reducing valve, to be mixed and combusted to form high-temperature and high-pressure impact wave. High-temperature vapour is injected into the drill holes by the heat injection and gas injection extracting pipe to promote desorption of the coal masses.

Classes IPC  ?

• E21B 43/26 - Procédés pour activer la production par formation de crevasses ou de fractures
• E21F 7/00 - Procédés ou dispositifs pour enlever les gaz, avec ou sans utilisation ultérieure de ceux-ci à une fin quelconque

Abrégé

22222, such that a large number of cracks are generated in the coal body around the borehole. High temperature steam is injected into the borehole by means of the heat injection and gas injection extraction pipe (6) to promote the desorption of the coal body. Combustion shock wave-induced cracking and heat injection are repeated, induced cracking and heat injection are alternately performed to promote the formation of more crack networks and the desorption and flow of gas in the coal body around the borehole, thus reinforcing the efficient extraction of the gas in the borehole.

Classes IPC  ?

• E21F 7/00 - Procédés ou dispositifs pour enlever les gaz, avec ou sans utilisation ultérieure de ceux-ci à une fin quelconque
• E21B 43/26 - Procédés pour activer la production par formation de crevasses ou de fractures

Abrégé

222222222 is compressed by means of the multistage impact, more fracture networks are formed on the coal body around the bore hole under the guiding action of the slots and the cracks, thereby enhancing the bore hole-based efficient gas extraction.

Classes IPC  ?

• E21B 43/26 - Procédés pour activer la production par formation de crevasses ou de fractures
• E21B 43/16 - Procédés de récupération assistée pour l'extraction d'hydrocarbures

Abrégé

Disclosed is an integrated hole sealing device for loose blasting and water injection of an underground well deep hole. The device comprises a capsule plug (1), an outer capsule (2), an inner capsule (3), a capsule water injection pipe (4), a drilling water injection pipe (5), and a conical plug (6). Two ends of the outer capsule (2) and the inner capsule (3) are respectively fixed to the capsule plug (1) and the conical plug (6); the capsule plug (1), the conical plug (6), the outer capsule (2), and the inner capsule (3) constitute a closed hollow cylindrical cavity (7); the central portion of the capsule plug (1) has a first hole site (8); the central portion of the conical plug (6) has a second hole site (9); the central portion of the inner capsule (3) is a hollow pipeline (10); two ends of the hollow pipeline (10) respectively correspond to the first hole site (8) and the second hole site (9); the drilling water injection pipe (5) passes through the hollow cylindrical cavity (7), and a portion of the drilling water injection pipe (5) located in the hollow cylindrical cavity (7) is telescopically wound around the outer side of the inner capsule (3); and the capsule water injection pipe (4) passes through the capsule plug (1) to extend into the hollow cylindrical cavity (7). The integrated hole sealing device has an ingenious structure, can be individually used for water injection in underground coal seams, and can be used in concert with a blasting device, so that integration of hole sealing, water injection and blasting is implemented.

Classes IPC  ?

• E21B 33/13 - Procédés ou dispositifs de cimentation, de bouchage des trous, des fissures ou analogues
• E21B 33/127 - PackersBouchons à manchon gonflable
• E21F 7/00 - Procédés ou dispositifs pour enlever les gaz, avec ou sans utilisation ultérieure de ceux-ci à une fin quelconque

Abrégé

A drilling and dust removal integrated device of a mining drill carriage, comprising: a drill pipe (2); a drill carriage motor (1) rotated to drive the drill pipe to drill; a dust hood (10) provided corresponding to the drill pipe; a cyclone dust collector (20) with an air inlet connected to the dust hood by means of a dust-removing duct (40); and an exhaust fan (30) with an exhaust opening connected to an air outlet of the cyclone dust collector by means of the dust-removing duct (40). The exhaust fan is in power connection with the drill carriage motor by means of a transmission mechanism (50), and the drill carriage motor rotates to drive the exhaust fan to operate, so that the dust-containing air generated by means of the drilling of the drill pipe at the dust hood is pumped into the cyclone dust collector to remove dust, and the dust-removed air is pumped to the exhaust fan so as to be discharged from an air outlet of the exhaust fan. The device can ensure the dust removal effect and simplify the structure of the mining drill carriage, so as to improve the flexibility and utilization convenience of the mining drill carriage. Also disclosed is a mining drill carriage comprising the device.

Classes IPC  ?

• E21B 7/02 - Appareils de forage caractérisés par des moyens de transport terrestre, p. ex. montés sur des patins ou des roues
• E21B 3/02 - Moyens d'entraînement de surface pour forage par rotation
• E21B 21/015 - Moyens en prise avec l'entrée du trou, p. ex. hottes d'aspiration de la poussière

Abrégé

Disclosed are a mining drill and a dust removal device therefor. The mining drill comprises a drill rotary device (1) and a drill rod (2), and during operation, the drill rotary device (1) drives the drill rod (2) to drill so as to perform drilling work. The dust removal device comprises: a dust collection cover (10), the dust collection cover (10) being arranged corresponding to the drill rod (2); a cyclone dust remover (20), an air inlet of the cyclone dust remover (20) being connected to the dust collection cover (10) by means of a dust removal conduit (40); and an exhaust fan (30), an air suction port of the exhaust fan (30) being connected to an air outlet of the cyclone dust remover (20) by means of the dust removal conduit (40), the exhaust fan (30) being in power connection with the drill rotary device (1) by means of a transmission mechanism (50), and during operation, the drill rotary device (1) driving the exhaust fan to operate so as to suck ,into the cyclone dust remover, dusty air generated by the drilling of the drill rod (2) at the dust collection cover (10) for dust removal, and to suck the air, which has been subjected to dust removal, into the exhaust fan to be exhausted via an exhaust outlet of the exhaust fan. The device can ensure the effect of dust removal, simplifies the structure of the mining drill and improves the flexibility and use convenience of the mining drill.

Classes IPC  ?

• E21B 21/015 - Moyens en prise avec l'entrée du trou, p. ex. hottes d'aspiration de la poussière

Abrégé

Disclosed are a mining drill and a dust suction cover therefor, and a dust removal device. The dust suction cover (1) comprises: a conical cover (10) and a cylindrical cover (20), wherein a top opening of the conical cover (10) matches an end opening of the cylindrical cover (20), a side wall opening of the cylindrical cover (20) serves as a dust outlet of the dust suction cover (1), and first notches are provided in the conical cover (10) in the direction of the generatrix of a cone; a conical inner baffle (30), which is correspondingly arranged in the conical cover (10), wherein second notches are provided at positions, corresponding to the first notches, in the conical inner baffle (30), a bottom opening of the conical inner baffle (30) is smaller than a bottom opening of the conical cover (10), a first dust suction port (31) is formed between the bottom opening of the conical inner baffle (30) and the bottom opening of the conical cover (10), and at least one second dust collection port (32) is provided in a side wall of the conical inner baffle (30); and a first plug member (40) matching the other end opening of the cylindrical cover (20), wherein a first drill rod connection port (41) is provided in the first plug member (40), and a drill rod (2) of the mining drill passes through the first drill rod connection port (41), such that the drill rod (2) passes through the dust suction cover (1). The drill has a good dust removal effect, and is easy to operate and use.

Classes IPC  ?

• E21B 21/015 - Moyens en prise avec l'entrée du trou, p. ex. hottes d'aspiration de la poussière

Abrégé

A bedding borehole-based gas extraction method capable of avoiding air leakage, comprising two stages, i.e., building a main gas extraction system and building an auxiliary gas extraction system: firstly, a main gas extraction pipeline (9) is laid inside a roadway (11), bedding extraction boreholes are constructed, the bedding extraction boreholes are sealed, and borehole-based gas extraction pipes are connected to the main gas extraction pipeline to perform gas extraction; and after all the boreholes in the roadway are sealed for extraction, an airtight wall is constructed at an opening of the roadway where the boreholes are constructed, an auxiliary gas extraction pipeline (10) is laid, and the auxiliary gas extraction pipeline (10) is connected to an auxiliary gas pump extraction pipeline to perform auxiliary extraction. The method can effectively resolve the problem of serious air leakage in a bedding borehole-based extraction process, has a simple process, is easy to implement, and can reduce labor costs.

Classes IPC  ?

• E21F 7/00 - Procédés ou dispositifs pour enlever les gaz, avec ou sans utilisation ultérieure de ceux-ci à une fin quelconque