Abstract: A device for grinding a side surface of an inner wall of a borehole comprises a base on which a direct current motor is installed on the base, one end of the direct current motor is electrically connected to a controller, and the other end of the direct current motor is in drive connection with a second rotating shaft of a right-angle drive steering gear by a universal drive joint. The controller is connected to an air pressure valve by a cable, and the air pressure valve is connected to an air pump through an air pipe. One end, away from the universal drive joint, of the right-angle drive steering gear is provided with a grinding cylinder. Grinding heads are respectively connected to first rotating shafts at both sides of the right-angle drive steering gear.

Abstract: An in-situ rock mass elastic modulus measurement system includes a controller, a telescopic rod, and a protective barrel; the telescopic rod is fixedly connected to the protective barrel; in-hole supporting structures are arranged at upper and lower ends in the protective barrel which is internally fixedly connected with a base; the base is slidably connected with a feeding sliding plate which is driven by a feeding cylinder and provided with a right-angle transmission diverter, a driving motor, and a grinding cylinder; the diverter is in transmission connection with the driving motor; two ends thereof are connected with grinding pressure heads; the diverter is driven by the grinding cylinder to translate horizontally, and drives the grinding pressure heads to outwards grind a borehole wall; a hydraulic oil cylinder is fixedly arranged on the feeding sliding plate; a displacement sensor is arranged on a cylinder body of the hydraulic oil cylinder.

Abstract: A device for grinding a side surface of an inner wall of a borehole is disclosed. The device comprises a base on which a direct current motor is, one end of the direct current motor is electrically connected to a controller, and the other end of the direct current motor is in drive connection with a second right-angle drive steering gear rotating shaft of a right-angle drive steering gear by a universal drive joint. The controller is connected to an air pressure valve by a cable, and the air pressure valve is connected to an air pump through an air pipe. One end, away from the universal drive joint, of the right-angle drive steering gear is provided with a grinding cylinder. Grinding heads are respectively connected to first right-angle drive steering gear rotating shafts at both sides of the right-angle drive steering gear.

Abstract: An in-situ vapor injection thermal desorption device includes a sectional combined input head, several intermediate connectors and a bottom protector connected in series from top to bottom. The in-situ vapor injection thermal desorption device further includes several water-vapor coupling injection activation chips, selectively disposed below any of the intermediate connectors; the sectional combined input head is provided with a high-pressure-gas inlet, several pairs of heat-transfer-oil inlets and heat-transfer-oil outlets, and several pairs of hot-water inlets and hot-water outlets; the water-vapor coupling injection activation chip is provided with several gas-liquid spraying holes.

Abstract: Disclosed a combined rock-breaking TBM tunneling method in complex strata for realizing three-way force detection, comprising the steps of preparing a combined mechanical-hydraulic rock-breaking cutter head for TBM construction; starting construction; advancing the combined mechanical-hydraulic rock-breaking cutter head; pushing and pressing against a tunnel face by a mechanical cutter tool; subjecting a three-way force detection cutter to squeezing forces; feeding back three-way force data by a three-way force sensor; processing information by a TBM back-end control processor; obtaining a value of rock-cutter contact angle ?; feeding back parameter information to a TBM cutter head control center by a lithology index center; responding by the TBM cutter head control center, obtaining and adjusting parameters by the mechanical cutter tool equipped with the three-way force sensor; and breaking rock by the combined mechanical-hydraulic rock-breaking cutter head.