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China University Of Mining And Technology
China University Of Mining And Technology Beijing
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China University Of Mining And Technology patents


Recent patent applications related to China University Of Mining And Technology. China University Of Mining And Technology is listed as an Agent/Assignee. Note: China University Of Mining And Technology may have other listings under different names/spellings. We're not affiliated with China University Of Mining And Technology, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "C" | China University Of Mining And Technology-related inventors


Method of performing combined drilling, flushing, and cutting operations on coal seam having high gas content and prone to bursts to relieve pressure and increase permeability

The present invention relates to a “drilling-flushing-slotting” coupled pressure relief and permeability increasing method for a high gas outburst coal seam, which is more particularly suitable for the pressure relief and permeability increasing when gas of a roadway band of the high gas outburst coal seam is pre-extracted through crossing... China University Of Mining And Technology

Fault-tolerant control position sensor of switched reluctance motor

A fault-tolerant control method for a position sensor of a switched reluctance motor, if the position sensor of the switched reluctance motor runs without a fault, detecting, in real time, four equal-interval or equal-angle continuous edge pulses of an output signal of the position sensor, the fourth edge pulse being... China University Of Mining And Technology

A horizontally movable vertical shaft rope guide and regulating method thereof

The present invention relates to a horizontally movable vertical shaft rope guide and a regulating method thereof which are suitable for guiding of hoisting containers in vertical shafts. The vertical shaft rope guide comprises a hoisting rope, and two hoisting containers suspended from the tail ends of the hoisting rope,... China University Of Mining And Technology

Vertical rope climbing inspection robot for ultra-deep vertical shaft steel-rope guide

Disclosed is a vertical rope climbing inspection robot for an ultra-deep vertical shaft steel-rope guide. The vertical rope climbing inspection robot comprises an explosion-proof shell, a driving mechanism, a wheel mechanism, a clamping mechanism, a carrying mechanism and an electric control device. The explosion-proof shell comprises an upper driving shell... China University Of Mining And Technology

Mechanical rocker arm-type vertical feeding cushioning device

A mechanical rocker-arm type vertical feeding cushioning device, consisting of two identical cushioning units and a box body (7). The two cushioning units are respectively arranged with a certain height difference on the inner side of the box body (7). Each cushioning unit consists of a cushioning mechanism and a... China University Of Mining And Technology

Three-phase switched reluctance motor torque ripple three-level suppression method

A three-phase switched reluctance motor torque ripple three-level suppression method. A first set of torque thresholds (th1low, th1zero, and th1up) is set in rotor position interval [0°, θr/3]. A second set of torque thresholds (th2low, th2zero, and th2up) is set in rotor position interval [θr/3, θr/2]. Power is supplied to... China University Of Mining And Technology

Method for efficiently treating spontaneous ignition of remaining coal in large area goaf of shallow-buried coal bed

A method for efficiently treating spontaneous ignition of the remaining coal in a large area goaf of a shallow-buried coal bed, which method integrates leaking stoppage, airflow control and fast inerting and cooling so as to efficiently prevent and treat the spontaneous ignition of the remaining coal in the large... China University Of Mining And Technology

Four-phase switched reluctance motor torque ripple two-level suppression method

A four-phase switched reluctance motor torque ripple two-level suppression method. A first set of torque thresholds is set in rotor position interval [0°, θr/4]. A second set of torque thresholds is set in rotor position interval [θr/4, θr/2]. Power is supplied to adjacent phase A and phase B for excitation.... China University Of Mining And Technology

Float-swing hydraulic support

A float-swing hydraulic support, including a top beam, shield beam, elevating frame, base, adjusting jack, two float hydraulic columns, base raising unit, advancing unit, face guard unit, telescopic beam unit, hydraulic control valve block, and a valve block support. The columns are between the top beam and base, with upper... China University Of Mining And Technology

Method for quantitative evaluation of switched reluctance motor system reliability through three-level markov model

A method for evaluation of switched reluctance motor system reliability through quantitative analysis of a three-level Markov model. Through analysis of the operating condition of switched reluctance motor drive system under first-level faults, second-level faults and third-level faults, 4 valid states and 1 invalid state under first-level faults, 14 valid... China University Of Mining And Technology

Braking torque closed-loop control switch reluctance motor

A braking torque closed-loop control system and method for a switch reluctance motor. The closed-loop control system comprises a torque regulator, a mode selector, a current regulator, an angle optimization controller and a torque estimator. On the basis of the rotating speed of the motor, the mode selector implements a... China University Of Mining And Technology

Three-phase switched reluctance motor torque ripple two-level suppression method

A three-phase switched reluctance motor torque ripple two-level suppression method is disclosed. A first set of torque thresholds is set in rotor position interval [0°, θr/3]. A second set of torque thresholds is set in rotor position interval [θr/3, θr/2]. Power is supplied to adjacent phase A and phase B... China University Of Mining And Technology

Cage energy supply system and control method therefor

A cage energy supply system comprises wind power generation devices, a tail rope beam suspension device and a control device that are connected to the bottom of a cage box. The tail rope beam suspension device and the control device are located on the central axis of the bottom of... China University Of Mining And Technology

Phase current integration diagnosing fault in switched reluctance motor power converter

A phase current integration method for diagnosing a fault in a switched reluctance motor power converter determines whether the main switch of a switched reluctance motor power converter is experiencing a short circuit or an open circuit fault by measuring a phase current io(t) transient value of said converter in... China University Of Mining And Technology

Device and detecting wall abrasion of solid filler feeding well

Disclosed is a device for detecting wall abrasion of a solid-filling feeding well and a detection method thereof. The device comprises a well wall abrasion detector, a horizontal displacement meter, a vertical displacement monitor, and a limit guide rod. One end of the limit guide rod is connected to the... China University Of Mining And Technology

Switch reluctance motor wide speed-regulation range cross-control method

A switch reluctance motor wide speed-regulation range cross-control method, the switch reluctance motor wide speed-regulation range control system consisting of a revolving speed regulator, a current chopper controller, an angle position controller, a chopper counter, a comparison selector and two resettable constant registers; the chopper counter counts the current chopping... China University Of Mining And Technology

Method for thermal-displacement-type strengthened extraction in drill hole

A method for thermal-displacement-type strengthened extraction in a drill hole, suitable for efficient gas extraction in a coal mine, the method comprising the following steps: arranging an extraction drill hole and a thermal displacement drill hole at intervals in a coal seam; continuously heating, by using a heat pipe (5),... China University Of Mining And Technology

Method for integrated drilling, flushing, slotting and thermal injection for coalbed gas extraction

A method for combining integrated drilling, flushing and slotting with thermal injection to enhance coalbed gas extraction, applicable to managing gas extraction from microporous, low-permeability, high-adsorption coalbed areas. A gas extraction borehole is drilled within a certain distance of a predetermined drilling, flushing and slotting borehole, and, once sealed, is... China University Of Mining And Technology

Method for removing hydraulic support for solid filling coal mining

A method for removing a hydraulic support for solid filling coal mining includes digging a support removing channel (3) in a coal body (2) in front of the hydraulic support (1), and laying a support removing track (4), then removing the hydraulic support from a coal conveying gateway (11) to... China University Of Mining And Technology

Multipoint coal and rock mass stress real-time monitoring device and method

A multipoint coal and rock mass stress real-time monitoring device. The device is composed of a plurality of capsule pressure sensors (1), connection rods (2), three-way valves (3), a multichannel monitor (4), a multichannel control valve (5), first high-pressure oil pipes (6), second high-pressure oil pipes (7), third high-pressure oil... China University Of Mining And Technology

Energy supply for monitoring wireless sensor node of roller

An energy supply method and device for a monitoring wireless sensor node of a roller. A node energy supply device (2) is arranged on a roller web (1). The node energy supply device (2) comprises a generator (2-1), a disc rail (2-3), an input shaft (2-4), a swing link (2-5),... China University Of Mining And Technology

Device and method using infrared radiation to observe coal rock fracture development process

A device and method of using infrared radiation to observe coal rock fracture development processes, for use in experiments to monitor coal rock fracture development using infrared radiation comprises three telescopic box bodies sleeved together. An infrared thermal imager connected to a computer is arranged at the front end of... China University Of Mining And Technology

Co3w3c fishbone-like hard phase-reinforced fe-based wear-resistant coating and preparation thereof

A Co3W3C fishbone-like hard phase-reinforced Fe-based wear-resistant coating and the preparation thereof, which belongs to the field of a wear-resistant coating on the surface of a material and a preparation method thereof. The wear-resistant coating comprises: 1.89-3.77% of C, 5.4-11.7% of Cr, 3.3-7.15% of Ni, 28.81-57.83% of W, 4.2-8.4% of... China University Of Mining And Technology

Tensioning device and tensioning steel wire rope of cage guide of ultra-deep vertical shaft

A tensioning device and a tensioning method for a steel wire rope of a cage guide of an ultra-deep vertical shaft. The tensioning device comprises an upper rope clamping device, a rope adjustment guide frame, a lower hydraulic rope locking device, and a lower hydraulic rope adjustment device. The upper... China University Of Mining And Technology

Four-phase switched reluctance motor torque ripple three-level suppression method

A four-phase switched reluctance motor torque ripple three-level suppression method. A first set of torque thresholds is set in rotor position interval [0°, θr/4]. A second set of torque thresholds is set in rotor position interval [θr/4, θr/2]. Power is supplied to adjacent phase A and phase B for excitation.... China University Of Mining And Technology

Integrated experimental system of hydrofracturing, water jet slotting, seepage and gas displacement under true triaxial stress

This invention relates to the coal mining field, specifically, to an integrated experimental system of hydrofracturing, water jet slotting, seepage and gas displacement under true triaxial stress. This invention consists of true triaxial stress loading experimental framework, a loading system and a monitoring system. Under true triaxial stress, experiments can... China University Of Mining And Technology

Method, apparatus and device of fracture avo inversion for fractured medium

The present disclosure discloses a fracture AVO inversion method for a fractured medium, wherein, said method includes: acquiring seismic data from the fractured medium; obtaining a reflection coefficient of the fractured medium, by an AVO inversion for the seismic data based on a newly-built equation. The present disclosure also provides... China University Of Mining And Technology

Industrial ct scanning test system and fluid pressure loading apparatus

A fluid pressure loading device applied to an industrial computed tomography scanning test system includes a body, a sample accommodating chamber and at least one fluid medium chamber being provided in the body. Each of the at least one fluid medium chamber is provided therein with a piston, the corresponding... China University Of Mining And Technology

Industrial ct scanning test system

An industrial CT scanning test system. The test system includes a test base, a multi-axis motion swivel table supported on the test base, a ray generator, an image acquisition device, and a fluid pressure loading device, and further includes a control device. The fluid pressure loading device includes at least... China University Of Mining And Technology








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