China University of Mining and Technology (CUMT)

Xuzhou Hongyi Technology Development Co., Ltd.

Liaoning University

Liaoning Technical University

Xuzhou Wushou Information Technology Co., Ltd.

Anye Cao

Yaoqi Liu

Linming Dou

Siyuan Gong

Geng Li

Chengchun Xue

Changbin Wang

Wu Cai

Xu Yang

Yujie Peng

Zhifeng Ma

Xianxi Bai

Qiang Niu

Liyuan Yu

Qing Ge

Minghe Ju

Fan Chen

Jianqiu Xue

Guowei Lyu

Yingyuan Wen

Guowei Lv

Shuchen Li

Chao Wei

Haijian Su

Lianpeng Dai

Wenhao Guo

Xuwei Li

Dejun Liu

Qiang Lu

Guifeng Wang

Xiang Ma

Songwei Wang

Xuming Zhu

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.

Rock burst hazard prediction method based on seismic wave energy attenuation characteristics of mine earthquake cluster

A stability assessment method of roadway surrounding rock includes: obtaining actual stratum rock parameters; establishing a two-dimensional geological model through numerical simulation based on a drill core columnar diagram and the actual stratum rock parameters; changing influencing factors, and recording amounts and acceleration values of deformation of roadway sidewalls, and whether failure occurs to obtain dynamic response characteristics of roadway surrounding rock, combining the changed influencing factors and the dynamic response characteristics as labels to obtain a dataset, and obtaining multiple datasets including the dataset; dividing the multiple datasets into a training set and a validation set, inputting the training set into a PSO-BP neural network and a GA-SVM deep learning model to obtain a preliminary stability assessment model, and adjusting and validating the preliminary stability assessment model by the validation set to obtain an optimized stability assessment model; and using the optimized stability assessment model to assess roadway stability.

Method for assessing stability of roadway surrounding rock based on numerical simulation and deep learning

The present disclosure provides a physics-based and data-driven integrated method for rock burst hazard assessment, including the following steps: determining an initial stress concentration coefficient by conducting grid discretization on an assessment region, and assigning a value to each of grid nodes using a Weibull distribution function; obtaining a stress concentration coefficient value of each grid node under physics-based models; introducing seismic wave CT detection data to obtain stress concentration coefficient distribution in the assessment region under the integration of a seismic wave CT detection and its derived characterization stress model; introducing microseismic data to obtain stress concentration coefficient distribution in the assessment region under the integration of a microseismic damage reconstruction stress model; and assessing the degree of rock burst hazard according to the size of the stress concentration coefficient value.

Physics-based and data-driven integrated method for rock burst hazard assessment

A test device and a test method for impact resistance of an anchor body are provided. The test device includes a workbench and a load-receiving steel frame. A support component is provided on the workbench, one end of the load-receiving steel frame is provided with a force-receiving plate, and the other end is provided with a tray. The tray is provided with an anchor rod located in the load-receiving steel frame. A steel pipe sleeved outside the anchor rod is movably provided in the load-receiving steel frame, and an end of the steel pipe is provided with a fixed rod passing through the tray. The fixed rod is movably connected to the tray, an end of the fixed rod is provided with a fixed base, the fixed rod is fixedly connected to the fixed base, and a buffering component is provided on the workbench.

Test device and test method for impact resistance of anchor body

An online stress monitoring system is used to obtain a stress distribution of each position, a geophone monitoring system is used to monitor high-frequency vibration signals produced by coal and rock fracture, a support resistance monitoring system is used to monitor working resistance of hydraulic supports in a working face, a well-ground joint microseismic system is used to monitor low-frequency vibration signals produced by the coal and rock fracture, and realize position of a microseismic source and inversion imaging of mining fractures, and an anchor stress monitoring system is used to monitor stress states of anchor bolts and cables. A data processing center is used to comprehensively process data obtained from the above five systems using an early warning model, thereby to obtain a prediction result of rock burst and determine whether to make early warning, thus workers can take timely measures according to the early warning situation.

Intelligent monitoring and early warning device and method for rock burst based on multi-field and multi-source information fusion

A similar simulation experimental device of hydraulic energy-absorbing roadway support is provided. A similar model is placed in a model box, a roadway is excavated in the similar model, and hydraulic energy-absorbing support devices are placed in the roadway on the periphery of the roadway. Front and rear ends of the hydraulic energy-absorbing support device are connected to supporting plates, left and right sides of the model box are provided with horizontal hydraulic cylinders, and front ends of the horizontal hydraulic cylinders are connected to pressure plates. One or several cushion blocks are placed at the top of the model box, and an upper pressure plate is placed above the cushion block(s). Vertical hydraulic cylinders are installed at both ends of the upper pressure plate. An impact rod passing through the upper pressure plate is placed above the cushion block to apply vertical impact load to the similar model.

Similar simulation experimental device of hydraulic energy-absorbing roadway support

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Xuzhou, China

Anye Cao