Abstract: Disclosed is a massive data-driven method for automatically locating a mine microseismic source, including: constructing a microseismic wave calibration data set by using a large-scale seismic data set containing seismic signals and non-seismic signals; constructing a pre-training calibration model based on a full convolution neural network through deep learning of a seismic wave calibration data set; using microseismic data of mine sites for transfer learning of an initial arrival time calibration model to construct an arrival time automatic calibration model suitable for mine microseismic signals; and automatically as well as accurately locating mine microseismic events based on an isokinetic homogeneous isotropic velocity model by using an optimization algorithm to deduce arrival time errors and through repeated iteration and fine-tuning.

Abstract: The present disclosure discloses a flammable and explosive liquid transportation system and a method and an application thereof. The system includes a gas inlet pipe and a liquid transportation pipeline; a first valve and a second valve are sequentially disposed on the gas inlet pipe; two ends of the liquid transportation pipeline respectively communicate with the raw material barrel and a reaction vessel, a third valve, a fifth valve, and a seventh valve are sequentially disposed on the liquid transportation pipeline; the gas inlet pipe and the liquid transportation pipeline communicate with each other, and a fourth valve is disposed on the connecting pipe; a bypass pipe is disposed on the liquid transportation pipeline, and a sixth valve is disposed on the bypass pipe. The present disclosure resolves problems of a high risk and poor environmental protection caused by an existing flammable and explosive liquid transfer manner.

Abstract: Disclosed is a method for analyzing and predicting a main fracture orientation of a mining face based on microseismic monitoring, including: collecting microseismic data generated by a coal rock burst; carrying out a hierarchical clustering on the microseismic data to obtain target hypocenter groups, of which the target hypocenter groups comprise several types of hypocenters; acquiring focal mechanism solutions of all the target hypocenter groups in the target hypocenter group, and acquiring a hypocenter azimuth and a hypocenter dip based on the focal mechanism solutions; and carrying out the hierarchical clustering on a hypocenter location, the hypocenter azimuth and the hypocenter dip, and predicting the main fracture orientation of the mining face.

Abstract: A rock burst hazard prediction method based on vibration wave energy attenuation characteristics of a mine earthquake cluster is provided. The rock burst hazard prediction method comprehensively considers the static load and dynamic load effects of the vibration waves of the mine earthquake cluster based on vibration wave energy attenuation characteristics of the mine earthquake cluster. The static load strength index and the dynamic load strength index involved in the method have clear physical meanings. A comprehensive prediction index calculation model proposed based on the dynamic and static load superposition principle of rock burst occurrence is clear, and the method has a firm theoretical support as well as strong universality and operability. Meanwhile, the updating and adjustment of weights are rapid and the objective judgment and prediction of the final comprehensive prediction results are efficient, and the high-energy mine earthquake and impact behavior area can be effectively predicted.

Abstract: A bioreactor generates load-bearing cartilaginous or fibro-cartilaginous tissue by applying hydrostatic pressure and/or deformational loading to scaffolds seeded with chondrocytes and/or other cells. A scaffold may be shaped to reproduce the geometry of all or part of a load bearing articular surface or defect as acquired from a database or patient-specific geometry data. Optionally a scaffold can be attached to a substrate which promotes integration of this tissue construct with the underlying bone of the patient joint. In the bioreactor, ambient hydrostatic pressure and scaffold deformational loading can be prescribed with any desired waveform, using magnitudes which prevail in diarthrodial joints. The loading platen, permeable or impermeable, may conform to all or part of the scaffold surfaces.