149 results about "Coal" patented technology

The invention discloses a coal-rock identification method based on image gray level co-occurrence matrixes. The coal-rock identification method comprises the following steps of: respectively collecting color images f1 and f2 of a known coal sample and a known rock sample under the same imaging condition; respectively capturing sub-images s1 and s2 which are the same in size and free of a background; extracting gray level co-occurrence matrixes P1 and P2 of the sub-images; calculating image characteristics K1 and K2 based on the gray level co-occurrence matrixes; for an unknown coal-rock object to be identified, collecting an image fx under the same imaging condition; capturing a sub-image sx free of the background according to the same size; extracting a gray level co-occurrence matrix PXof the sx; calculating an image characteristic value Kx based on the gray level co-occurrence matrixes; and judging the coal-rock type according to a relation between Kx and K1 and K2. Because non-contact identification based on the images is utilized, the coal-rock identification method has the characteristics of easy deployment, strong adaptability, high identification rate and the like.

The invention relates to a separate type filling method of a goaf. A plurality of flexible filling bags are hung at longitudinal or transverse intervals along the propelling direction of a coal face in the goaf and a template supported by a single brace is erected outside the filling bags. Specifically, the method includes: filling high-water materials in the filling bags; after the high-water materials are coagulated, dismantling the template and the single brace to complete a row of separation bodies; advancing along the coal face and repeating the steps until the coal advances to reach the span separating the goaf; then building a row of transverse enclosed separation body walls, irrigating the high-water materials to the enclosed wall; then continuing the work repeatedly until the coal face finishes; subsequently building an enclosed wall in a transportation alley and a track alley; and conducting final filling to complete the filling work of the whole goaf. The method uses the enclosed separation body goaf, irrigates the enclosed goaf on the basis of no accidental fall of top plates. The filling method is simple, the equipment investment is low, the filling efficiency and filling compactness are high, the stability is good and the cost is low.

The invention discloses a comprehensive control method for rockburst in a multiple-coalbed mining mine. According to the method, rockburst is controlled by employing two-side blasting for pressure relief, pressure-relief chamber establishment and coalbed high-pressure water injection according to monitoring data. The source of the monitoring data comprises electromagnet radiation monitoring, drilling-cutting-method pulverized coal monitoring, mine pressure monitoring and micro-seismic monitoring system monitoring. Two-side blasting for pressure relief means that during tunneling of upper gangway and lower gangway of a working face, following closely the tunneled working face, deep-hole pressure-relief blasting is arranged to the lower side of the upper gangway and the upper side and the slower side of the lower gangway. Pressure-relief chamber establishment means that the pressure-relief chambers are disposed on the lower side of the upper gangway and the upper side and the lower side of the lower gangway every 40 meters during tunneling. The coalbed high-pressure water injection means that advance water injection accompanied by coalbed high-pressure water injection is carried out on the upper sides and the lower sides of the gangways and in the pressure-relief chambers for rockburst control. According to the method of the invention, multiple methods are used for comprehensive forecasting, so that the rockburst control level is improved, the loss caused by rockburst is effectively reduces, and thus the pertinence and the effectiveness of the rockburst control are substantially enhanced.

The invention relates to a method to separate temperate coal race component based on the extract and the stripping, which belongs to the separating method of the coal race component. Join the component solvent into the coal sample, agitate it and obtain the extract liquid-solid mixture; Carries on the liquid-solid separation to the extract liquid-solid mixture, obtains the extracted liquid and the gathering excess separately; To gathers the excess water used wash, then the vacuum drying, obtains gathers -odd coal; Joins the stripping medicinal preparation in the extracted liquid, the agitation, obtains the stripping liquid-solid mixture and carries on the liquid-solid separation to it, obtains the solid matter and the wet goods; To solid matter water used wash, dry, obtains the refined coal; The wet goods are two laminations: To a lamination takes off resolve A with the atmospheric pressure distillation, carries on the stripping again to the surplus solution, will produce sticks the thick shape solid, carries on the drying process to it, obtains the caking component; Another lamination is mainly resolved B and the stripping medicinal preparation omnium-gatherum. We bench work skill process is simple, the extract and the stripping process is temperate, the resolved recycle, the reaction process is advantageous for the control, can cause the coal petroleum to separate Cheng Cuiyu the coal, the refined coal, the caking group to classify many kinds of unique race components equally in advance likely.

The invention relates to a low-permeability coal high-pressure gas cycle pulse fracturing anti-reflection experimental method belonging to the field of low-permeability coal seam reinforcement anti-reflection technology. The low-permeability coal high-pressure gas cycle pulse fracturing anti-reflection experimental method adopts a low-permeability coal high-pressure gas cycle pulse fracturing anti-reflection experimental device, and comprises the following steps of: (1) installing a monitoring element; (2) measuring the coal permeability before anti-reflection; (3) starting a high-pressure gas impact system for impacting coal briquettes in a circulating way; and (4) measuring the coal permeability after anti-reflection; and the low-permeability coal high-pressure gas cycle pulse fracturing anti-reflection experimental device comprises a coal sample, a blasting cylinder mechanism, a triaxial loading system, a high pressure gas impact system and a coal permeability measurement system.

The invention discloses a method and a system for automatically identifying a coal rock interface of a coal cutter, and automatically heightening a roller, and relates to the technical field of automatically identifying the coal rock interface of the coal cutter, and automatically heightening the roller. A controller is arranged on the body of the coal cutter; and the controller stores a cutting force response value used for identifying various coal rock media, the maximum value of each cutting state continuous time, and a height preset value of the roller. When the coal cutter works, the controller determines the current cutting state continuous time, compares the current cutting force response value, the current cutting state continuous time, and the height of the roller with the preset value in the controller according to a corresponding algorithm, and automatically identifies the current cutting medium; and the roller is heightened according to the identifying result and the corresponding algorithm. The method and the system have the advantages that the identifying result of the coal rock interface is more comprehensive; and the roller is automatically heightened, and the height of the roller can be prevented from being frequently adjusted.

The invention relates to a coupler, and discloses a double-edge structure speed regulating permanent magnet coupler for solving the problems that in an existing coal mine factory, a high-power induction motor is started in an on-load mode, due to the fact that the starting torque of the induction motor is small, when the starting torque is smaller than the load torque in value, on-load starting can not be achieved in a directly-starting mode, and an adopted controller of the motor is high in price. The double-edge structure speed regulating permanent magnet coupler comprises a driving shaft, an output shaft, a flange with a neck, a release bearing block, a release bearing, a first support, a second support, a first magnetism conducting driving disc, a second magnetism conducting driving disc, an electric conducting metal disc, at least three positioning columns, a plurality of permanent magnets and a plurality of air gap adjustment devices. The first support, the first magnetism conducting driving disc, the second magnetism conducting driving disc and the second support are sequentially arranged in parallel, and the permanent magnets are fixedly installed on the two opposite plate faces of the first magnetism conducting driving disc and the second magnetism conducting driving disc in the circumferential direction of the input shaft. The double-edge structure speed regulating permanent magnet coupler belongs to the technical field of speed regulating coupling driving.

The invention relates to a treatment method for slab retention in slab continuous casting. The treatment method is characterized by comprising the following steps: firstly, confirming slab retention reasons divided into two kinds according to all slab retention conditions suffered by domestic and abroad slab continuous casting machines at present: 1) long continuous casting machine downtime caused by equipment faults and operation reasons, slab retention caused by slab supercooling or slab retention resulted from the condition that the local thickness of a slab exceeds a set value because process, continuous casting cooling and hydraulic equipment faults appear; and 2) slab retention resulted from cold steel jamming and bonding of the slab and other equipment of the casting machine because the continuous casting machine suffers from process abnormity accidents including steel leakage and steel overflow; and next, adopting an optimal control method for different streamline secondary cooling water quantities, an optimizing method for different sector section lifting and slab drawing pressure and speed settings and a cutting method for accidents with different coal gas-to-oxygen ratios according to the different reasons.

The invention discloses a microwave excitation coal-bed gas desorption and seepage experimental device, and belongs to coal-bed gas desorption and seepage experimental devices. The microwave excitation coal-bed gas desorption and seepage experimental device comprises a tri-axial pressure device and a microwave generating device. The tri-axial pressure device comprises an upper gland, a lower gland, a barrel, a piston, a barrier, an upper pressure head and a lower pressure head, the microwave generating device comprises a microwave antenna, a waveguide tube, a resonant cavity, a magnetron and a controller, the upper gland and the lower gland are respectively arranged on the upper portion and the lower portion of the barrel, the piston is arranged inside the lower gland, the barrier is fixed onto the inner side wall of the lower gland, the lower pressure head is arranged inside the lower gland, and the microwave antenna is arranged on the inner side wall of the barrel; the upper pressure head is arranged in the barrel, and the waveguide tube, the resonant cavity, the magnetron and the controller are arranged on the outside of the barrel. The microwave excitation coal-bed gas desorption and seepage experimental device has the advantages that desorption and seepage functional tests can be carried out on coal, desorption and seepage laws of the coal under a microwave effect can be acquired, and reliable data can be provided for reasonably draining and comprehensively utilizing coal-bed gas resources.

The invention discloses a method for adjusting the clearance of a bearing at the upper part of the heavy loaded planetary reducer of a coal cutter cutting unit. The heavy loaded planetary reducer includes an inner ring gear, a sun gear and a planet carrier. On the planet carrier are mounted a plurality of planetary gears, the sun gear is engaged with the plurality of planetary gears, the inner gear ring is engaged with the planetary gears, a first bearing seat is arranged on the coal cutter cutting unit and located at the lower part of the planet carrier, a first tapered roller bearing is arranged on the first bearing seat, a second bearing seat is arranged at the upper part of the inner ring gear, and a second tapered roller bearing is arranged on the second bearing seat. The method for adjusting the clearance of the second tapered roller bearing comprises (1) mounting a seal cover; (2) calculating the clearance S between the seal cover and the second bearing seat; (3) calculating the adjustment amount X of the clearance of the second tapered roller bearing; and (4) modifying the seal cover according to the adjustment amount X. The clearance adjusting method is good to use, not only improves the service life of the bearing, but also improves the service life of the coal cutter.

The invention discloses a method for fracturing a coal seam by employing high-pressure gas. The method comprises the following steps: (1) tipsily drilling from a lower floor roadway of the coal seam to an upper coal seam; (2) inserting three pipes into a drill hole, and injecting polyurethane which is 20-50cm in thickness into the drill hole; (3) injecting cement mortar into the drill hole from a first grouting pipe, and shutting off a first which is arranged at the rear end of the first grouting pipe until the cement mortar overflows from a second grouting pipe; (4) injecting plugging mucilage glue containing particulate matters into the drill hole by virtue of the second grouting pipe after 12-24 hours; (5) injecting a high-pressure gas of which the pressure is 30-60MPa into the drill hole through a fracturing extraction pipe. According to the method disclosed by the invention, the plugging mucilage glue containing particulate matters is pressed into a pore fracture of a rock section under the effect of air pressure; the high-pressure gas is plugged by virtue of the mucilage glue; the problem of air leakage of the high-pressure gas in the coal seam fracturing process is effectively solved; the gas pressure of the fractured coal seam reaches the cracking pressure of the coal seam.

The invention discloses a method for preparing an absorbing material by using lakebed sludge. According to the method, the absorbing material can be prepared by the following steps of adding bagasse and red soil into solid waste of the lakebed sludge and coal ash which serve as raw materials, and then drying, screening, carbonizing, calcining and drying. The method is simple, easy to operate and wide in application rang. Laboratory tests prove that the absorbing material can remove heavy metal in a water body effectively and can adsorb common dyes well.

The invention discloses a coal seam anti-reflection method for circular damage by using cold shock of liquid nitrogen and phase change gas. First, a layer penetrating drill hole is drilled in a roadway to a coal seam through a rock layer; in the layer penetrating drill hole, the coal seam is cut to form multiple cracks perpendicular to the layer penetrating drill hole; a liquid nitrogen injectingpipe and an exhaust pipe extend into the layer penetrating drill hole; and the exhaust pipe is connected with two gas pipelines separately provided with a safety valve and a spherical valve. The spherical valve performs the on-off control over the emission of nitrogen when the liquid nitrogen is injected in the layer penetrating drill hole; after the spherical valve is closed, a threshold of the safety valve is set, so that the safety valve controls the pressure in the layer penetrating drill hole; and after the air pressure in the layer penetrating drill hole exceeds the threshold each time,the safety valve is opened to discharge internal nitrogen for pressure relief, and the safety valve is automatically closed after the pressure relief. The method can guarantee that the liquid nitrogenis quickly and continuously injected in the layer penetrating drill hole, and meanwhile, cracks of coal masses are caused by using cold shock of the liquid nitrogen, the expansion pressure of the phase change gas and the frost heaving pressure of water in the cracks to effectively guarantee the anti-reflection effect.

The invention discloses a novel filter material used in process of bio-aeration filter tank, which comprises (by weight percentage) coal ash 30-60%, adhesives 30-65%, lightweight porous granulate 1-8%, pore-forming agent 0.5-5%. The composition is prepared by using lightweight porous granulate with a finite grain size e.g. expanded perlite as core material, using coal ash, adhesives and pore-forming agent as cover material through mixing, spraying water onto core material, curing and solidifying.

The invention discloses a structure of a coal mine lifter patrol climbing robot and belongs to lifter detection and maintenance equipment for coal mines. The structure comprises two two-freedom-degree wrist structures and climbing mechanical arms hinged to the two two-freedom-degree wrist structures, and the electromagnetic suckers are arranged at the bottoms of the two two-freedom-degree wrist structures respectively. The wrist structures are installed on the electromagnetic suckers, the other ends of the wrist structures are connected with the mechanical arms through shafts, the two mechanical arms are connected through a shaft and driven by a motor, rotation of other parts except the working sucker is achieved, and the two suckers move alternately so that the robot can climb. By means of the electromagnetic suckers, the surface of a lifter support is attracted and clamped tightly through the electromagnetic suckers, and sprayed paint on the surface of the support can not be damaged. Adjustment among multiple degrees of freedom makes the climbing robot reach any surface in the length range of the support structure, the robot can move flexibly and transversely move or change a work plane. The robot is simple in structure, small in self weight and capable of reaching any space position to adapt to complex working conditions.

The invention discloses a system and a method for monitoring a dynamic disaster of a coal mine with fiber bragg gratings. According to the system and the method, the fiber bragg gratings (1) are distributed in or on the surface of rod bodies of anchor rods (2); the anchor robs (2) are inserted into two uppers of a roadway of the coal mine or other effective positions by drilling holes; and optical connector (11) capable of being connected with the external are introduced from the tails of the anchor rods (2), and connected with fiber bragg grating network demodulation instruments (5) which are connected to a testing computer (6) to form a testing system for monitoring the dynamic strain. With the adoption of the system and the method disclosed by the invention, the dynamic disaster can be relatively accurately forecasted, and relatively high performance of preventing outside interference can be achieved; and the method is an intrinsic safety testing method.

The invention relates to a device for testing a contamination characteristic of a segmental temperature control coal burning boiler. The device comprises a hearth and a flue, wherein the lower end of the hearth is connected with a combustor for spraying coal powder and an opposed air pipeline; the combustor is connected with a primary air inlet pipeline and a secondary air inlet pipeline respectively; the primary air inlet pipeline and the secondary air inlet pipeline as well as the opposed air pipeline are communicated with an air blower respectively; a heat preservation layer is arranged on the outer side of the hearth; a plurality of electric heating elements are arranged on the wall of the hearth in a segmental manner; segmental cooling clamping sleeves are arranged outside the flue; the tail of the flue is connected with a heat exchanger; and a plurality of test holes are formed in the hearth and the flue. The device can simulate various temperature situations of the hearth of the actual boiler, so that the stability and the flexibility of a test system are improved; by adopting segmental electric heating, the hearth can be stabilized at test required temperature; by adopting the segmental cooling clamping sleeves, the smoke temperature in the flue can be precisely controlled in a required range, and environments at different positions of the flue in the actual boiler can be simulated; and the contamination characteristic of the coal powder in different smoke temperature regions is convenient to research.

The invention provides a soil solidifying material used for over-wet soil and a use method thereof, relating to a soil solidifying material and a use method thereof, aiming at providing the soil solidifying material used for over-wet soil with good reinforced effect and strong solidifying soil water stability and the use method thereof. The technical scheme of the invention is as follows: the soil solidifying material used for over-wet soil comprises the following components in parts by weight calculated by supposing that the over-wet soil needs to be treated is 100 parts by weight: 1-8 parts of soil solidifying agent, 1-10 parts of lime, 0-8 parts of cement and 0-20 parts of coal ash. The use method comprises the following steps: grinding and levelling the soil, evenly spreading the soil solidifying material on the soil; grinding, blending and laminating the soil solidifying material and the over-wet soil together; carrying out material enclosing on the soil layer which is initially laminated for 24-28 hours; and evenly spreading the soil solidifying material on the soil layer again, then stirring, grinding and compacting. The invention is mainly used for the treatment of over-wet soil.

The invention provides a multifunctional organic/inorganic compound fertilizer and a preparation method thereof. The compound fertilizer is composed of the following raw materials by weight percent: 25-30% of urea, 5-10% of monoammonium phosphate, 10-18% of potassium sulphate, 27-32% of humic acid, 1.5-3% of zinc sulfate, 0.1-0.3% of microorganism bacterial liquid, 12-20% of diatomite and 1.9-2.7% of sophorolipid, wherein humic acid is obtained from decomposed coal through activation treatment. During preparation, urea, monoammonium phosphate, potassium sulphate, humic acid, zinc sulfate, microorganism bacterial liquid, diatomite and sophorolipid are added to a mixing crusher for crushing, so that a powdery mixture is obtained; the powdery mixture is added to a drum coating-pelleting-drying-cooling integrated machine to be pelleted, dried and cooled so that a granular mixture is obtained; the microorganism bacterial liquid and the diatomite are mixed and then sprayed to the mixture so that a crude product of the multifunctional organic/inorganic compound fertilizer is obtained; and finally, the crude product is added to a vibrating sieve for screening and then the obtained oversize is the multifunctional organic/inorganic compound fertilizer.

The invention relates to a coal mine omnipotent gas extraction agent, in order to solve the problem of poor gas extraction effect in existing coal mines. The extraction agent comprises the following raw materials according to weight ratio: 100 of water-soluble organic acid and 3-28 of sugar. The weight ratio of raw materials is 100 of water-soluble organic acid and 3-28 of sugar, and the extraction agent further comprises water of which the weight is 5-18 times as that of the above raw materials. The water-soluble organic acid is selected from fulvic acid, acetic acid, complex acid obtained from plant fermentation, citric acid and lactic acid; the sugar is selected from maltose, sucrose, fructose, konjac powder and agar. The extraction agent has the advantages of low cost, easy operation and use, no influence on coal quality, good effect, ability of improving the gas extraction effect of coal mines dramatically, no obvious influence on underground operation staff and equipment, high security and high efficiency.

The invention provides a method for extracting a drum load spectrum of a cutting unit of a drum shearer. The method comprises the steps of obtaining a coal rock occurrence condition of a rock sample of a coal rock; testing a stress condition of a single cutting tooth of a drum of the cutting unit of the shearer to obtain a mean load model of the single cutting tooth; randomizing the mean load model of the single cutting tooth to create a cutting load random theoretical model of the single cutting tooth; according to the cutting load random theoretical model of the single cutting tooth, superposing three-way cutting force of the single cutting tooth to obtain a drum load spectrum model of the cutting unit of the drum shearer; and performing transient response analysis on each part of the drum according to the drum load spectrum model of the shearer to obtain a load spectrum of each position of each part of the drum. According to the method, random load models of the single cutting tooth are superposed to obtain random three-way force and three-way moment in the mass center of the drum, so that load input bases can be provided for subsequent calculation, analysis, optimization design and the like of a transmission system of the cutting unit of the shearer.

The invention discloses a coal mine down hole fireproof airtight wall construction method. The method comprises the following steps that three cuttings are dug upward on the circumference of the inner wall of a roadway, the three cuttings is the first cutting, the second cutting and the third cutting; the thickness of red machine brick protection walls and the red machine brick covering walls are arranged according to the fracture surface of the roadway, and the red machine brick protection walls and the red machine brick covering walls are piled in the first cutting and the third cutting correspondingly; a concrete bone wall is poured in the second cutting; first filling materials are filled into filling layers between concrete bone walls and the red machine brick protection walls; and after the red machine brick protection walls are piled completely, second filling materials are injected into the filling layers, so that gaps between the first filling materials in the filling layers and the roof of the roadway are fully filled. The coal mine down hole fireproof airtight wall construction method can be utilized to prevent gas of a work-out area from penetrating to the pedestrian roadway.

The invention discloses a derailment monitoring system of endless-rope continuous towing vehicles and a monitoring method of the derailment monitoring system. An inductance type proximity switch of the derailment monitoring system is installed on a shuttle car; the shuttle car is provided with an emitter; the emitter is connected with the inductance type proximity switch; the emitter emits detection signals of the inductance type proximity switch; a router is installed at one side of a tunnel; the router receives the detection signals emitted by the emitter and transmits the detection signals to a receiver; the receiver is connected with a PLC processor through a bus; the PLC processor is connected with a display screen; the PLC is also connected with a relay; and the relay is connected with a control switch of a winch. With the monitoring method of the derailment monitoring system adopted, the position of the shuttle car can be positioned in real time, and the operation state of the shuttle car can be judged, and if a sensor predicts derailment, alarm signals can be generated, and the motor of the winch can be locked, and therefore, major accidents can be avoided, and efficient and safe operation of a coal mine auxiliary transportation system can be ensured; and derailment prediction information and shuttle car position information can be combined together, so that fault points can be found timely, and therefore, maintenance and repair can be performed.