Study on Stability and Control of Pre-excavated Withdrawal Channel under Mining Influence
نویسندگان
چکیده
Abstract Pre-excavated withdrawal channel (PWC) is an effective means to shorten the time of fully mechanized working face and improve efficiency, safety, reliability during withdrawal. However, key success method influence mining on stability PWC, taking III32upper1 Zhuzhuang Coal Mine as engineering background. By theoretical analysis numerical simulation, deformation PWC analyzed mechanical model instability main roof fracture established. And effect rotation analyzed. The result shows that coal pillar leads rotary width gradually decreases, which further aggravates degree ground pressure behavior. Based a control proposed. This uses hydraulic fracturing technology weaken stress prevent above PWC. through establishment calculation model. practice demonstrates significantly reduced, surrounding rock in effectively controlled after fracturing.
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ژورنال
عنوان ژورنال: Lithosphere
سال: 2022
ISSN: ['1941-8264', '1947-4253']
DOI: https://doi.org/10.2113/2022/8798300