Dynamic monitoring system of coal mine roof plate

The invention discloses a dynamic monitoring system of a top plate of a coal mine; the data of four subsystems of a monitoring subsystem of a hydraulic bracket of the comprehensive mechanized mining face under the coal mine, a monitoring subsystem of wall rock delamination and a top plate of a laneway, a monitoring subsystem of super supporting stress of coal rock and a monitoring subsystem of supporting stress of an anchoring rod of the wall rock of the laneway is transmitted to a main monitoring station which is used for the coal mine and arranged under the mine by a data communication cable used for the coal mine; the main monitoring station used for the coal mine transmits the data to a data communication interface which is used for the coal mine and arranged on the mine by compatibletelephone lines or an ethernet ring network exchanger; then the data is transmitted to a monitoring server which is provided with monitoring and analysis software by the data communication interface used ...

SECONDARY PREPRESSING-TYPE PRESSURE-MEASURING INSTRUMENT

A device is meant for measuring internal pressure in hydraulic prop in coal mine. It features that a U-shape sleeve is spirally fit with casing. When the casing moves forward, the grease in a sealed cavity that is formed by the combination of said sleeve, casing and three-purpose valve generates a primary pre-pressure to the three-purpose valve. Pushing prop by a lever can generates a secondary pre-pressure. Therefore, its advantages include carrying out the measurement without unloading and flexible operation because of using lever to push the prop.

Tailing slag recycling and concentrating treatment device

The invention relates to a tailing slag recycling concentration treatment device which comprises a supporting frame, a storage base is installed at the upper end of the supporting frame, a concentration tank is arranged in the storage base in an up-down sliding mode, a lifting air cylinder is connected between the storage base and the concentration tank, and a stirring assembly located in the concentration tank is connected with the storage base through a fixing frame. Water absorption modules are uniformly arranged on the periphery of the concentration tank, the water absorption modules are in extrusion fit connection with the inner side wall of the storage base, an opening and closing opening capable of being controlled to be opened and closed is formed in the lower end of the concentration tank, and the conveying module corresponding to the opening and closing opening in position is installed at the lower end of the storage base. The problems that after a flocculating agent is mixed ...

Multisource information fusion method in evidence high-conflict environment

The invention discloses a multisource information fusion method in an evidence high-conflict environment, which comprises the following steps of: determining the mutual support degree of evidences according to evidence distances, further calculating the relative discount factor of each evidence by taking a characteristic vector corresponding to the maximum characteristic value of a evidence support degree matrix pattern as a weighting vector of the evidence, wherein the evidence with the maximum weighing coefficient is a key evidence; and discounting each evidence information, and fusing the information of multisource sensor data by using the D-S (Dempster/Shafer) rule so as to increase the accuracy and precision of a monitoring proposition judgment under an evidence high-conflict status.The method can effectively eliminate the uncertainties of multisource information, increase the accuracy of information evaluation and overcome the limitation that correct evaluation results can not be ...

Dynamic monitoring system of coal mine roof plate

The invention discloses a dynamic monitoring system of a top plate of a coal mine; the data of four subsystems of a monitoring subsystem of a hydraulic bracket of the comprehensive mechanized mining face under the coal mine, a monitoring subsystem of wall rock delamination and a top plate of a laneway, a monitoring subsystem of super supporting stress of coal rock and a monitoring subsystem of supporting stress of an anchoring rod of the wall rock of the laneway is transmitted to a main monitoring station which is used for the coal mine and arranged in the mine by a data communication cable used for the coal mine; the main monitoring station used for the coal mine transmits the data to a data communication interface which is used for the coal mine and arranged on the mine by compatible telephone lines or an ethernet ring network exchanger; then the data is transmitted to a monitoring server which is provided with monitoring and analysis software by the data communication interface used ...

Mine roof safety evaluation method based on multi-target monitoring data fusion

The invention discloses a mine roof safety evaluation method based on multi-target monitoring data fusion, mainly characterized in that the mine roof safety state is defined into three grades according to the actual production condition of a coal mine, and a frame for identifying the roof safety condition is determined; a computer fuses the elementary probability of multi-target monitoring sensordata by utilizing a data fusion model based on the D-S evidence theory to obviously show a certain state of roof safety, thereby realizing the purpose of identifying the roof safety state; and the computer analyzes the assigned value of the fused elementary probability according to the classification decision rules of the roof safety state and outputs the identifying result of the roof safety state, thereby realizing the evaluation of the mine roof safety condition. The invention establishes a conceptual framework for mine roof safety evaluation and provides information processing steps of analysis ...

Secondary prepressing-type pressure-measuring instrument

Method and device for precision measurement of deep compression amount of virgin coal

The invention discloses a method and a device for precision measurement of deep compression amount of virgin coal. The device comprises two micro-pressure sensing devices, a liquid box and a monitoring instrument consisting of a single chip microcontroller. As for the structure of each micro-pressure sensing device, a liquid cavity is arranged in a sealed circular tube shell, the liquid surface of the liquid cavity is provided with a pressure sensor connected with a transducer, and the transducer is connected with a cable socket on the circular tube shell. The liquid cavities of the two micro-pressure sensing devices are communicated with the liquid box through communication tubes, and the two micro-pressure sensing devices are connected with the monitoring instrument by signal wires through the cable sockets. The invention adopts a liquid pressure difference measurement method and the communicating vessel principle so as to be capable of measuring the height difference of two reference ...

Remote monitoring predicting method of empty zone hard top plate

Machine-mounted tunneling, drilling and anchoring comprehensive integrated operation device

The invention discloses a machine-mounted tunneling, drilling and anchoring comprehensive integrated operation device comprising a tunneling machine body and an anchor drill supporting mechanism. The anchor drill supporting mechanism is provided with a left-side front extended supporting arm, a right-side front extended supporting arm, a left-side telescopic arm, a right-side telescopic arm, cross-beam angle adjusting hydraulic cylinders at the left side and the right side, drill supporting cross beams and an anchor drill, wherein the drill supporting cross beams are respectively connected with supporting seats at the corresponding side through a left-side upright rod and a right-side upright rod, the lower part of each supporting seat is articulated with the front end of the telescopic arm at the same side, a piston rod of the cross-beam angle adjusting hydraulic cylinder at the same side is articulated with the upper part of the supporting seat at the same side, a cylinder body of the ...

Control system of monorail crane

The invention provides a control system of a monorail crane high in safety coefficient, light in weight, small in failure rate and easy to expand. The control system comprises an electric control unit for controlling detection and communication, wherein the electric control unit comprises a display unit for detecting data and displaying the operating state of the monorail crane, a control unit for controlling operation of the monorail crane and a controller for detecting parameters, sending detection information to the display unit and sending control signals to the control unit. The controller is respectively connected with the display unit and the control unit. The control system further comprises a hydraulic pressure unit for controlling the monorail crane to start or stop operation, wherein the hydraulic pressure unit is connected with the electric control unit and comprises a starting unit, a brake unit and a clamp force control unit. The control system of the monorail crane provided ...

Electronic atomizer

The utility model discloses an electronic atomizer, including tobacco tar lid, atomizer main part and battery connecting seat, the atomizer main part includes filling oil cover fixed loop, oil feed switch, atomizing core, atomizing core fixing base, glass pipe and glass socle seat, the filling oil cover fixed loop with tobacco tar lid looks spiro union, the battery connecting seat with atomizing core fixing base cup joints mutually. The utility model discloses simple structure, convenient operation from the top oiling, has solved the problem of the easy oil leak of structure of top oiling.

Portable automatic tourist guide playback device and method

A portable automatic tour guide broadcasting device providing the tour guiding information service for tourists includes GPS receiver to receive the geographic coordinates information relating to thecorresponding scene, the public information receiver the receive the public information of scene located, the central control unit to demodulate and receive the geographic coordinates information andthe public information of scene and the voice circuit to store the geographic coordinates code and description code of the scene as well as to play them for the tourists.

Constant-temperature heating dyeing device for mycobacterium tuberculosis smear dyeing

A mycobacterium tuberculosis smear dyeing constant-temperature heating dyeing device comprises a base. The supporting frame is fixedly mounted on the top of the base; the gear motor is fixedly mounted on the top of the base; the screw rod is fixedly mounted on an output shaft of the gear motor; the sliding block is mounted on the screw rod in a threaded manner; the connecting block is fixedly mounted on one side of the supporting frame; the outer wall of one side of the frame body is fixedly connected to the connecting block; and the supporting seat is fixedly mounted on the inner wall of the bottom of the frame body. The mycobacterium tuberculosis smear dyeing constant-temperature heating dyeing device has the advantages that the dyeing efficiency is improved, time and labor are saved, and the device is convenient to use.