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公开(公告)号：US11473427B2
公开(公告)日：2022-10-18
申请号：US16537604
申请日：2019-08-11
Applicant: Taiyuan University of Technology
Inventor： Guorui Feng , Jiaqing Cui , Haina Jiang , Zhen Li , Cheng Song , Xiong Shen , Xiaohong Niu , Shengyong Hu , Yanna Han
IPC: E21C41/18 , G06F30/20 , G06F17/18 , G06F30/333
Abstract: A physical simulation test method for detecting a position of a ponding goaf in the excavation, which relates to physical detection of mines. This method includes: fabricating an experimental model of a composition similar to that of an excavating tunnel; fabricating a transient transmitting coil and receiving coil; connecting the coil to a wire and placing them in model A; connecting the coil to a transient electromagnetometer; injecting water into a trapezoidal goaf through a pre-buried plastic pipe; after the goaf is filled with water, immediately switching the transient electromagnetometer on to collect data; respectively transferring the coil to models B, C and D, injecting water and switching on the transient electromagnetometer to collect data; statistically analyzing detection and imaging results of the four models; and comparing the detection results with the actual data to determine detection accuracy and correction coefficient.
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公开(公告)号：US12098637B2
公开(公告)日：2024-09-24
申请号：US18595263
申请日：2024-03-04
Applicant: Taiyuan University of Technology
Inventor： Guorui Feng , Wei Guo , Tingye Qi , Zhu Li , Jiaqing Cui , Yekai Cui , Jingkai Ma
CPC classification number: E21C41/18 , E21C2100/00 , E21F15/00
Abstract: An I-patterned filling method for an initial stage of coal mining based on roof fracture characteristics is provided. A relationship between an overburden load borne by a main roof and an overhang size is determined based on principle of virtual work and a surgery theory when an overhang distance of the main roof reaches an initial weighting interval to enter a plastic limit state with an advance of a working face to obtain the initial weighting interval. An initial fracturing interval of an immediate roof is obtained in the same way. According to a subsidence law of the main roof in an inverted hip roof form, the filling is performed at a key position around an internal plastic hinge line through I-patterned three-strip filling. Size parameters of the I-pattered filling are designed to prevent the immediate roof and the main roof from being fractured.
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3.发明授权公开(公告)号：US10809417B2
公开(公告)日：2020-10-20
申请号：US16234497
申请日：2018-12-27
Applicant: Taiyuan University of Technology
Inventor： Guorui Feng , Chunwang Zhang , Zhixin Jin , Rui Gao , Shengyong Hu , Zhen Li , Jiaqing Cui , Cheng Song , Xiaohong Niu
Abstract: 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.
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