The present invention discloses a tunnel toxic-and-harmful-gas deep-hole detection device and method. The tunnel toxic-and-harmful-gas deep-hole detection device comprises a detector, a lifter, and a control terminal, which are sequentially connected. The control terminal controls the lifter to achieve movement of the lifter. The detector comprises a shell with a hollow interior and two opened ends. An air inlet is formed in the outer wall of the shell. A gas detector and a gas sampler are arranged in the shell, and the air inlet is located therebetween. The tunnel toxic-and-harmful-gas deep-hole detection method comprises two steps, namely a gas detection step and a gas sampling step. The present invention can effectively detect components and concentrations of various gases in a drill hole, wherein the detection data is real-time and accurate.

A reaming and self-rotating anchor rod includes 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 reaming and self-rotating anchor rod includes 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 method for classifying a phreatic leakage disaster level in shallow coal seam mining includes the following steps: S1. arranging a monitoring hole in a coal mine working face and burying a telemetering water level gauge to perform water level monitoring; S2. monitoring a ground elevation, calculating a ground subsidence amount, and collecting mining advance distance information; S3. plotting variation relationship curves of mining advance distance and phreatic water level as well as mining advance distance and ground subsidence according to monitored information, respectively; and S4. comparing the curves with a no-leakage graph, a slight-leakage graph, and a heavy-leakage graph, and determining a leakage level; and S5. further classifying a studied area as an environmental disaster area or an environmentally friendly area.

An anchor bolt length determination method based on monitoring of a roof rock stratum horizontal extrusion force includes drilling a borehole in the middle of a roadway roof to determine a surrounding rock fracturing scope by a borehole television. The method includes selecting the number and locations of horizontal extrusion force measuring points according to the surrounding rock fracturing scope. The method includes monitoring and recording a change of the horizontal extrusion force over time in the borehole by a device for monitoring a roof rock stratum horizontal extrusion force. The method includes selecting a location with the largest horizontal extrusion force as a center of a anchoring segment of an anchor bolt to determine a distance between the anchoring center and the roof. The method includes calculating a total length of the anchor bolt.

An anchor bolt length determination method based on monitoring of a roof rock stratum horizontal extrusion force includes drilling a borehole in the middle of a roadway roof to determine a surrounding rock fracturing scope by a borehole television. The method includes selecting the number and locations of horizontal extrusion force measuring points according to the surrounding rock fracturing scope. The method includes monitoring and recording a change of the horizontal extrusion force over time in the borehole by a device for monitoring a roof rock stratum horizontal extrusion force. The method includes selecting a location with the largest horizontal extrusion force as a center of a anchoring segment of an anchor bolt to determine a distance between the anchoring center and the roof. The method includes calculating a total length of the anchor bolt.

The present invention relates to the field of prevention of a water disaster in coal mining, and discloses a risk evaluation method of an overburden bed-separation water disaster in a mining area. In the prior art, prevention of the bed-separation water disaster is achieved mainly by making bed-separation water cut-off holes and diversion holes underground; however, the degree of a roof bed-separation water disaster in the mining area has not yet been qualitatively or quantitatively evaluated and analyzed, resulting in blindness of the prevention of the bed-separation water disaster. In order to solve this problem, the present invention provides a risk evaluation method of an overburden bed-separation water disaster in a mining area, which includes the following steps: S1. collecting geological information about strata in the mining area; S2. calculating the height of a water-conducting fissure zone in the mining area; S3. based on a composite beam principle, determining a bed separation development position in strata above the water-conducting fissure zone; and S4. calculating a bed-separation water inrush coefficient, and zoning the mining area based on a risk of an overburden bed-separation water disaster. The present invention can predict and evaluate a risk of an overburden bed-separation water disaster in the mining area in advance, thus providing a scientific basis for designing a scheme to prevent the bed-separation water disaster, and guaranteeing coal mining safety.

Known georeferencing techniques require input in the form of manually-chosen anchor points or dense surveyed data. The present invention is an improved method and system for georeferencing underground geometric data. The method comprises (a) visiting at least two control points; (b) obtaining information about each of the at least two control points using scanning means; (c) recording the information about the at least two control points into a computer processor; and (d) performing a best-fit transformation to the recorded information. Preferably, the scanning means comprises laser scanners and at least two radio-frequency identification (RFID) tags. However, other technologies, such as retro-reflective LIDAR targets, Wi-Fi access points or bar codes and a bar code reader may also be used. In addition, sonar, radar, flash LIDAR, MEMS LIDAR, or any other similar technology could be used.

Known georeferencing techniques require input in the form of manually-chosen anchor points or dense surveyed data. The present invention is an improved method and system for georeferencing underground geometric data. The method comprises (a) visiting at least two control points; (b) obtaining information about each of the at least two control points using scanning means; (c) recording the information about the at least two control points into a computer processor; and (d) performing a best-fit transformation to the recorded information. Preferably, the scanning means comprises laser scanners and at least two radio-frequency identification (RFID) tags. However, other technologies, such as retro-reflective LIDAR targets, Wi-Fi access points or bar codes and a bar code reader may also be used. In addition, sonar, radar, flash LIDAR, MEMS LIDAR, or any other similar technology could be used.

The invention discloses an automated material inventory and delivery system for underground mines using a shaft and hoist transporting material from the surface to working areas. The system includes means for automatically and paperless processing orders for supplies from a plurality of locations within the mine. The system communicates to client through a plurality of terminals located throughout the mine and tracks material received, stored and distributed using electronic inventory tracking means. Loading and unloading of material into and out of the cage is automatic and includes automatic guided vehicle means to gather the ordered material and deliver to the cage. The system includes means whereby consumable supplies are autonomously delivered to a working area to ensure sufficient material is on hand to meet production targets. Ore may be transported to the surface using the cage and ore containers, optimizing the use of the hoist and increasing mine production.