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Study on Roof Control Technology of Gob-Side Entry Retaining in Guqiao Deep Mining

Author: YangBaiShun
Tutor: ZhangNong
School: China University of Mining and Technology
Course: Mining engineering
Keywords: Sham Tseng Along goaf Bolting Filling the wall Numerical Analysis
CLC: TD353
Type: Master's thesis
Year: 2008
Downloads: 751
Quote: 10
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Abstract


With China 's coal mining depth increased year by year , the gas content gradually increases and the occurrence of abnormal stope gas gauge problem is a serious threat to the safe production of coal mines , and along goaf solve Face Gas gauge problem the most effective way , while still achieving continuous mining of coal pillars , improve resource recovery , it has become a hot topic in China 's coal mining . The combined the existing along goaf research pointed out When forefront goaf exist some problems , a comprehensive analysis of the deformation and failure of Deep Roadway characteristics , stoping spatial stress distribution law , stay Lane side of roof movement the boreholes that law, the role of filling the wall next to the Lane , an alley off support in the form of choice and Lane offshoot support resistance along goaf must pay attention to several key issues . The FLAC numerical calculation software, a detailed analysis along goaf since excavation to two mining activities affect the various stages of the deformation of the surrounding rock , especially in filling the wall next to the Lane of different widths and different roof lithology conditions Roadway the deformation of a comparative analysis , come to the of filling wall next to mine deep well Guqiao with high pressure thick layer composite roof Lane reasonable width . The numerical simulation results , based roof prestressed structure theory proposed effective anchor to strengthen control technology principle and specific geological mining conditions for Guqiao mine , given the different stages of the roadway in the excavation , recovery and stay Lane roof control technology . 1115 the Guqiao Mine ( 1) the work surface crossheading along goaf engineering practice of the research results achieved initial success , a the Sham Tseng large cross-section along goaf anchor net support technology Roadway retaining the roadway section remained in the 8.0m2 above meet the requirements. Creating a modern mine fast and efficient recovery along empty stay in lane innovative engineering , face the highest daily output of 16426t, the highest yield recorded to create a working face at home and abroad along goaf . Figure 46 papers , 4 tables , 70 references .

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CLC: > Industrial Technology > Mining Engineering > Mine the pressure and support > Mine support equipment > Roadway support
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