A dynamically self-balancing pressurized borehole sealing apparatus and method thereof for coal seam gas pressure measurement having a pressure measuring tube arranged in a borehole with one end of the pressure measuring tube provided with a pressure measuring unit. The pressure measuring tube is wrapped with an expansion airbag and provided with a pressure introducing hole communicating with the expansion airbag. On each side of the expansion airbag, the pressure measuring tube is wrapped with a front borehole inflatable sealing airbag and a rear borehole inflatable sealing airbag respectively. A gel injection chamber is reserved between the front borehole sealing airbag and the rear borehole sealing airbag and between the expansion airbag and an inner side of the borehole. Gas from the pressure measuring tube expands the expansion airbag and squeezes sealing gel in the gel injection chamber into borehole fractures for dynamic pressurized sealing.

A dynamically self-balancing pressurized borehole sealing apparatus and method thereof for coal seam gas pressure measurement having a pressure measuring tube arranged in a borehole with one end of the pressure measuring tube provided with a pressure measuring unit. The pressure measuring tube is wrapped with an expansion airbag and provided with a pressure introducing hole communicating with the expansion airbag. On each side of the expansion airbag, the pressure measuring tube is wrapped with a front borehole inflatable sealing airbag and a rear borehole inflatable sealing airbag respectively. A gel injection chamber is reserved between the front borehole sealing airbag and the rear borehole sealing airbag and between the expansion airbag and an inner side of the borehole. Gas from the pressure measuring tube expands the expansion airbag and squeezes sealing gel in the gel injection chamber into borehole fractures for dynamic pressurized sealing.

A Noise Suppression device is provided for pneumatic noise producing tools, including jack leg drills, jack hammers and other hand-operated machinery. This device comprises an expansion chamber substantially enclosing a sound source of the noise producing tool. The chamber comprises a lining and, preferably, an acoustic panel to provide sound absorption. In one embodiment, the device also includes a skirting to direct the noise away from the tool. The lining of the expansion chamber may comprise a material such as Thinsulate old filter casing, or other noise absorbing material to absorb at least a portion of the sound, reducing the level of noise emanating from the drill during operation. The device preferably includes an outer shell or protective surface which may comprise a durable material such as HDPE plastic and comprises an inner surface. The device not only reduces muffler noise but also the noise from the tool itself.

A Noise Suppression device is provided for pneumatic noise producing tools, including jack leg drills, jack hammers and other hand-operated machinery. This device comprises an expansion chamber substantially enclosing a sound source of the noise producing tool. The chamber comprises a lining and, preferably, an acoustic panel to provide sound absorption. In one embodiment, the device also includes a skirting to direct the noise away from the tool. The lining of the expansion chamber may comprise a material such as Thinsulate old filter casing, or other noise absorbing material to absorb at least a portion of the sound, reducing the level of noise emanating from the drill during operation. The device preferably includes an outer shell or protective surface which may comprise a durable material such as HDPE plastic and comprises an inner surface. The device not only reduces muffler noise but also the noise from the tool itself.

The present invention provides a reaming and self-rotating anchor rod and a construction method using the reaming and self-rotating anchor rod, which are applicable to supporting for quick tunneling of coal roadways. The reaming and self-rotating anchor rod comprises a rod body, a drill bit, a connecting member, a tray and a nut; one end the connecting member is snap-fixed to the tail part of the rod body, the other end of the connecting member is connected to an anchor rod bolter, the rod body has an annular protrusion at its middle part to block powder so that the powder fills up the clearance between the rod body and the coal mass; the drill bit has female threads and can be screwed into the front part of the rod body, and the drill bit has baffle pawls and spiral grooves on its side surface; a hole in length smaller than the length of the anchor rod is drilled out with an anchor rod bolter first, and then the anchor rod is connected to the anchor rod bolter, the drill bit on the front part of the anchor rod is placed in the preformed hole, and finally the anchor rod is driven to ream and rotate into the coal mass, so as to accomplish the construction with the reaming and self-rotating anchor rod; the reaming and self-rotating anchor rod can shorten supporting time and avoid an abandoned borehole phenomenon incurred by hole collapse or blockage, and anchoring failure, etc., and the anchor rod is simple to manufacture, low in cost, and simple and convenient to operate. Therefore, the anchor rod and the method of using it can be widely applied and can meet the requirement for quick tunneling of coal roadways.

A mine safety apparatus, and related method, that records movement data of a scene, visual images of the scene and correlates the movement data with the visual images. The apparatus comprises: a slope monitoring device that records location data in the scene and tracks the location data over time to identify movement and produce visual movement overlays; an image capture device that records a plurality of visual images of the scene from a location; and a processor that stitches the visual images into a panoramic image of the entire scene and for selected Points of Interest in the scene accurately determines a coordinate so that the visual movement overlays are correctly correlated with the Points of Interest.

A mine safety apparatus, and related method, that records movement data of a scene, visual images of the scene and correlates the movement data with the visual images. The apparatus comprises: a slope monitoring device that records location data in the scene and tracks the location data over time to identify movement and produce visual movement overlays; an image capture device that records a plurality of visual images of the scene from a location; and a processor that stitches the visual images into a panoramic image of the entire scene and for selected Points of Interest in the scene accurately determines a coordinate so that the visual movement overlays are correctly correlated with the Points of Interest.

A hazard point marking method and a hazard point marking system are provided. The method includes: acquiring, by Augmented Reality (AR) glasses, position information of a hazard point in response to a triggering operation of an inspector, where the position information of the hazard point is used for characterizing a position of the hazard point in a tunnel model; sending, by the AR glasses, the position information of the hazard point to a server; and marking, by the server, the hazard point in the tunnel model based on the position information of the hazard point.

A hazard point marking method and a hazard point marking system are provided. The method includes: acquiring, by Augmented Reality (AR) glasses, position information of a hazard point in response to a triggering operation of an inspector, where the position information of the hazard point is used for characterizing a position of the hazard point in a tunnel model; sending, by the AR glasses, the position information of the hazard point to a server; and marking, by the server, the hazard point in the tunnel model based on the position information of the hazard point.

There is described a system for sending, via a communication network, data originating from a monitoring of equipment in a network-inaccessible location. The system comprises a first interface device to be operated in a network-inaccessible location and comprising: sensors for monitoring a first equipment; a processor connected to the sensors for generating a data packet from the monitoring; and a local input/output (I/O) device for sending the data packet. The system further comprises a second interface device, to be displaced from the network-inaccessible location to a network-accessible location, comprising a local I/O device for receiving the data packet from the first interface device; and a network-connected I/O device to deliver the data packet via the communication network.