Within the technical field of detecting a mining-induced failure range of rock mass, and particularly relating to a graded-pressure drop type detection system and detection method of borehole cracks, a detection system is provided including a test probe, a drilling rig, a drill pipe and a control operation platform. The test probe includes a plugging device and a pressure conversion assembly. The pressure conversion assembly is connected with the plugging device at the rear end through a connected pipe and includes a first stage pressure converting device and a second stage pressure converting device. The detection system simplifies the existing operating system, avoids the problem of drill pipes winding in drill hole, realizes plugging process and detection process with the same external water source, and ensures that the plugging process and the observation process operate under respective predetermined pressures.

A three-dimensional analog simulation test system for gas-liquid countercurrent in an abandoned mine goaf includes a three-dimensional analog simulation device configured to simulate an analog environment of gas-liquid countercurrent in an abandoned mine goaf, a gas supply system, an automatic water pressure control system and a hydraulic loading system. The three-dimensional analog simulation device includes a reaction frame and a three-dimensional analog simulation chamber. The reaction frame includes a beam, a base and a column for connecting the beam and the base. The three-dimensional analog simulation chamber is arranged inside the reaction frame. The test system can be used to simulate the gas-liquid countercurrent in an abandoned mine goaf so as to study the evolution of water accumulation and gas enrichment in long-term abandonment of closed mines and the migration evolution rules of gas-liquid two-phase in abandoned mines with high gas density.

A three-dimensional analog simulation test system for gas-liquid countercurrent in an abandoned mine goaf includes a three-dimensional analog simulation device configured to simulate an analog environment of gas-liquid countercurrent in an abandoned mine goaf, a gas supply system, an automatic water pressure control system and a hydraulic loading system. The three-dimensional analog simulation device includes a reaction frame and a three-dimensional analog simulation chamber. The reaction frame includes a beam, a base and a column for connecting the beam and the base. The three-dimensional analog simulation chamber is arranged inside the reaction frame. The test system can be used to simulate the gas-liquid countercurrent in an abandoned mine goaf so as to study the evolution of water accumulation and gas enrichment in long-term abandonment of closed mines and the migration evolution rules of gas-liquid two-phase in abandoned mines with high gas density.

A monitoring device and a monitoring method for dynamic development of an overburden mining separated bed are provided. The monitoring device includes a settlement magnetic ring assembly and a mounting conduit. The settlement magnetic ring assembly includes an anchor strap assembly, a magnetic induction iron ring and a magnetic ring sleeve sleeved outside the magnetic induction iron ring. The anchor strap assembly is arranged at the outer circumference of the magnetic ring sleeve and has a contraction state and an expansion state. The anchor strap assembly in the contraction state can move in a monitoring hole, and at least two fixing points at different heights are formed in the anchor strap assembly in the expansion state and the wall of the monitoring hole in a vertical direction. Two ends of the mounting conduit are connected to a drill rod and the magnetic ring sleeve respectively.

A monitoring device and a monitoring method for dynamic development of an overburden mining separated bed are provided. The monitoring device includes a settlement magnetic ring assembly and a mounting conduit. The settlement magnetic ring assembly includes an anchor strap assembly, a magnetic induction iron ring and a magnetic ring sleeve sleeved outside the magnetic induction iron ring. The anchor strap assembly is arranged at the outer circumference of the magnetic ring sleeve and has a contraction state and an expansion state. The anchor strap assembly in the contraction state can move in a monitoring hole, and at least two fixing points at different heights are formed in the anchor strap assembly in the expansion state and the wall of the monitoring hole in a vertical direction. Two ends of the mounting conduit are connected to a drill rod and the magnetic ring sleeve respectively.

The invention relates to methods for determining a soil class, in which an earth borehole is introduced into the ground by means of a ground drilling device with a drill head, wherein a parameter of the ground drilling device and/or an operational parameter of the ground drilling device is assessed during the determination of which soil class is involved.

Methods and systems for rock recognition are provided. In one embodiment, a method comprises: receiving or generating, at one or more computing systems, data comprising at least one drilling variable for a plurality of drilled holes across observations at a plurality of depths, wherein the at least one drilling variable is a variable affected by at least one physical characteristic of rock in the plurality of drilled holes; determining, by the one or more computing systems, a plurality of characteristic measures for each of the plurality of drilled holes, wherein the plurality of characteristic measures for each drilled hole comprise: at least one characteristic measure of a first type, wherein a characteristic measure of the first type is a measure based on a comparison of a distribution of a said at least one drilling variable for the drill hole with a distribution of a related or the same drilling variable across a plurality of the drilled holes; and at least one characteristic measure of a second type, wherein a characteristic measure of the second type is based on said at least one drilling variable across the plurality of depths of the drilled hole; applying, by the one or more computing systems, unsupervised learning to the plurality of characteristic measures, the unsupervised learning determining groups of the drilled holes; and generating, by the one or more computing systems, an output indicating the determined groups of the drilled holes.

Methods and systems for rock recognition are provided. In one embodiment, a method comprises: receiving or generating, at one or more computing systems, data comprising at least one drilling variable for a plurality of drilled holes across observations at a plurality of depths, wherein the at least one drilling variable is a variable affected by at least one physical characteristic of rock in the plurality of drilled holes; determining, by the one or more computing systems, a plurality of characteristic measures for each of the plurality of drilled holes, wherein the plurality of characteristic measures for each drilled hole comprise: at least one characteristic measure of a first type, wherein a characteristic measure of the first type is a measure based on a comparison of a distribution of a said at least one drilling variable for the drill hole with a distribution of a related or the same drilling variable across a plurality of the drilled holes; and at least one characteristic measure of a second type, wherein a characteristic measure of the second type is based on said at least one drilling variable across the plurality of depths of the drilled hole; applying, by the one or more computing systems, unsupervised learning to the plurality of characteristic measures, the unsupervised learning determining groups of the drilled holes; and generating, by the one or more computing systems, an output indicating the determined groups of the drilled holes.

A system and method are provided for the tracking of material milled via a milling machine, to improve recycling possibilities for the milling material. The milling material removed during milling is deposited onto a vehicle for transport to a deposition site. A first detection device associated with the milling machine detects data signals relating to the milling material, and the milling material is tracked via a documentation device comprising a user interface, based at least on the data signals. The documentation device may selectively display which milling material has been unloaded at a particular deposition site. A marking device may be provided to mark the milling material or the transport vehicle, and/or a second detection device may be provided to detect position data corresponding to the deposition site, wherein the marking and/or position data are interlinked with the data signals relating to the milling material in the documentation device.

A system and method are provided for the tracking of material milled via a milling machine, to improve recycling possibilities for the milling material. The milling material removed during milling is deposited onto a vehicle for transport to a deposition site. A first detection device associated with the milling machine detects data signals relating to the milling material, and the milling material is tracked via a documentation device comprising a user interface, based at least on the data signals. The documentation device may selectively display which milling material has been unloaded at a particular deposition site. A marking device may be provided to mark the milling material or the transport vehicle, and/or a second detection device may be provided to detect position data corresponding to the deposition site, wherein the marking and/or position data are interlinked with the data signals relating to the milling material in the documentation device.