Research on Deformation Mechanisms and Control Technology for Floor Heave in Deep Dynamic Pressure Roadway
Source abstract
Abstract
Under deep, high-intensity mining conditions, a high mineral pressure develops at the working face, which can easily cause floor heave deformation of the roadway. In this paper, with the geological conditions of Buertai coal mine as the background, through on-site monitoring and numerical simulation, the mechanism of strong dynamic pressure roadway floor heave is clarified and a cooperative control method for roadway floor heave deformation is proposed. The main conclusions are as follows: (1) The overall strength of the floor of this strong dynamic pressure roadway is low, which can easily cause roadway floor heave, and on-site multivariate monitoring of the mine pressure is carried out, which clarifies the evolution law of the mine pressure of the mining roadway and along-the-airway roadway. (2) Combined with FLAC3D numerical simulation software, we analyze the influence of coal seam depth and floor lithology on the stability of the roadway floor and find that both have a significant influence on the stability of the roadway. Under the condition of high-intensity mining, the floor will deteriorate gradually, forming a wide range of floor heave areas. (3) Based on the deformation and damage mechanism of the roadway floor, a synergistic control method of “roof cutting and pressure relief + floor anchor injection” is proposed and various technical parameters are designed. An optimized design scheme is designed for the control of floor heave in Buertai coal mine.
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Research context
OpenAlex topics: Structural Engineering and Vibration Analysis · Geotechnical Engineering and Underground Structures · Simulation and Modeling Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory for Tunnel Engineering, Shandong University, Jinan 250061, China
School of Civil Engineering, Shandong University, Jinan 250061, China
State Key Laboratory for Tunnel Engineering, China University of Mining and Technology—Beijing, Beijing 100083, China
Funding
National Natural Science Foundation of China · China Postdoctoral Science Foundation · Shandong Postdoctora1 Science Foun-dation, China
References (31)
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