Height of fractured zone inside overlying strata under high-intensity mining in China
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摘要
The height of fractured zone(HFZ) at the high-intensity longwall mining panel plays a vital role in the safety analysis of coal mining under bodies of water. This paper described definitions of the highintensity mining. The processes of overburden failure transfer(OFT) were analyzed, which were divided into the development stage and the termination stage. Through theoretical analysis, the limited suspension-distance and the limited overhanging distance were proposed to judge the damage of each stratum. Mechanical models of strata suspended integrity and overhanging stability were established.A theoretical method to predict the HFZ at the high-intensity longwall mining panel was put forward based on the processes of OFT. Taking a high-intensity longwall mining panel(No. 11915 panel) as an example, the theoretical method proposed, the engineering analogy and the empirical formulas in the Regulation were used to predict the HFZ. The results show that the theoretical result is consistent with the engineering analogies' result and empirical formulas' result. The rationality and reliability of the theoretical method proposed is verified.
The height of fractured zone(HFZ) at the high-intensity longwall mining panel plays a vital role in the safety analysis of coal mining under bodies of water. This paper described definitions of the highintensity mining. The processes of overburden failure transfer(OFT) were analyzed, which were divided into the development stage and the termination stage. Through theoretical analysis, the limited suspension-distance and the limited overhanging distance were proposed to judge the damage of each stratum. Mechanical models of strata suspended integrity and overhanging stability were established.A theoretical method to predict the HFZ at the high-intensity longwall mining panel was put forward based on the processes of OFT. Taking a high-intensity longwall mining panel(No. 11915 panel) as an example, the theoretical method proposed, the engineering analogy and the empirical formulas in the Regulation were used to predict the HFZ. The results show that the theoretical result is consistent with the engineering analogies' result and empirical formulas' result. The rationality and reliability of the theoretical method proposed is verified.
The height of fractured zone(HFZ) at the high-intensity longwall mining panel plays a vital role in the safety analysis of coal mining under bodies of water. This paper described definitions of the highintensity mining. The processes of overburden failure transfer(OFT) were analyzed, which were divided into the development stage and the termination stage. Through theoretical analysis, the limited suspension-distance and the limited overhanging distance were proposed to judge the damage of each stratum. Mechanical models of strata suspended integrity and overhanging stability were established.A theoretical method to predict the HFZ at the high-intensity longwall mining panel was put forward based on the processes of OFT. Taking a high-intensity longwall mining panel(No. 11915 panel) as an example, the theoretical method proposed, the engineering analogy and the empirical formulas in the Regulation were used to predict the HFZ. The results show that the theoretical result is consistent with the engineering analogies' result and empirical formulas' result. The rationality and reliability of the theoretical method proposed is verified.
引文
[1]Guo WB,Shao Q,Yin SX,Shao HP.Analysis of the security of mining under a reservoir.J Min Safety Eng 2006;23(3):324-8.
[2]Guo WB,Zou YF,Hou QL.Fractured zone height of longwall mining and its effects on the overburden aquifers.Int J Min Sci Technol 2012;22(5):603-6.
[3]Trueman R,Lyman G,Cocker A.Longwall roof control through a fundamental understanding of shield-strata interaction.Int J Rock Min Sci 2009;46(2):371-80.
[4]Cheng GW,Chen CX,Ma TH,Liu HY,Tang CN.A case study on the strata movement mechanism and surface deformation regulation in Chengchao underground iron mine.Rock Mech Rock Eng 2017;50(4):1011-32.
[5]Adhikary DP,Guo H.Modelling of longwall mining-induced strata permeability change.Rock Mech Rock Eng 2015;48(1):345-59.
[6]State Bureau of Coal Industry.Specification for coal pillar retention and coal mining in buildings,water bodies,railways and main wells and alley.Beijing:Coal Industry Press;2017.
[7]Xu YC,Li JC,Liu SQ,Zhou L.Calculation formula of‘‘Two-zone”height of overlying strata and its adaptability analysis.Coal Min Technol 2011;16(2).p.4-7+11.
[8]Xu JL,Wang XZ,Liu WT,Wang ZG.Effects of primary key stratum location on height of water flowing fracture zone.Chin J Rock Mech Eng 2009;28(2):380-5.
[9]Xu JL,Zhu WB,Wang XZ.New method to predict the height of fractured waterconducting zone by location of key strata.J Chin Coal Soc 2012;37(5):762-9.
[10]Gao YF,Huang WP,Liu GL,Zhang SF,Zhu QM,Deng ZY.The relationship between permeable fractured zone and rock stratum tensile deformation.JMin Safety Eng 2012;29(3):301-6.
[11]Huang WP,Gao YF,Wang B,Liu JR.Evolution rule and development height of permeable fractured zone under combined-strata structure.J Min Safety Eng2017;34(2):330-5.
[12]Li S,Fan C,Luo M,Yang Z,Lan T,Zhang H.Structure and deformation measurements of shallow overburden during top coal caving longwall mining.Int J Min Sci Technol 2017;27:1081-5.
[13]Majdi A,Hassani FP,Nasiri MY.Prediction of the height of destressed zone above the mined panel roof in longwall coal mining.Int J Coal Geol2012;98:62-72.
[14]Wu Q,Shen JJ,Liu WT,Wang Y.A RBFNN-based method for the prediction of the developed height of a water-conductive fractured zone for fully mechanized mining with sublevel caving.Arab J Geosci 2017;10(7):172.
[15]Fan LM.On coal mining intensity and geo-hazard in Yulin-Shenmu-Fugu mine area.China Coal 2014;40(5):52-5.
[16]Guo WB,Wang YG.The definition of high-intensity mining based on green coal mining and its index system.J Min Safety Eng 2017;34(4):616-23.
[17]Wang JC,Wang ZH.Stability of main roof structure during the first weighting in shallow high-intensity mining face with thin bedrock.J Min Safety Eng2015;32(2):175-82.
[18]Xu NZ,Gao C,Ni XZ,Liu MH.Study on surface cracks law of fully-mechanized top coal caving mining in shallow buried depth and extra thick seam.Coal Sci Technol 2015;43(12):124-8.
[19]Wang X,Meng FB.Statistical analysis of large accidents in China’s coal mines in 2016.Nat Hazards 2018;92(1):311-25.
[20]Lawson HE,Tesarik D,Larson MK,Abraham H.Effects of overburden characteristics on dynamic failure in underground coal mining.Int J Min Sci Technol 2017;27:121-9.
[21]Miao XX,Mao XB,Hu GW,Ma ZG.Research on broken expend and express and press solid characteristics of rocks and coals.J Exp Mech 1997;3:64-70.
[22]Guo GL,Miao XX,Zhang ZN.Research on rupture rock mass deformation characteristics of longwall goals.Sci Technol Eng 2002;5:44-7.
[23]Hu BN,Zhang HX,Shen BH.Guidelines for the retention and coal mining of coal pillars in buildings,water bodies,railways and main wells and alley.Beijing:Coal Industry Press;2017.
[2]Guo WB,Zou YF,Hou QL.Fractured zone height of longwall mining and its effects on the overburden aquifers.Int J Min Sci Technol 2012;22(5):603-6.
[3]Trueman R,Lyman G,Cocker A.Longwall roof control through a fundamental understanding of shield-strata interaction.Int J Rock Min Sci 2009;46(2):371-80.
[4]Cheng GW,Chen CX,Ma TH,Liu HY,Tang CN.A case study on the strata movement mechanism and surface deformation regulation in Chengchao underground iron mine.Rock Mech Rock Eng 2017;50(4):1011-32.
[5]Adhikary DP,Guo H.Modelling of longwall mining-induced strata permeability change.Rock Mech Rock Eng 2015;48(1):345-59.
[6]State Bureau of Coal Industry.Specification for coal pillar retention and coal mining in buildings,water bodies,railways and main wells and alley.Beijing:Coal Industry Press;2017.
[7]Xu YC,Li JC,Liu SQ,Zhou L.Calculation formula of‘‘Two-zone”height of overlying strata and its adaptability analysis.Coal Min Technol 2011;16(2).p.4-7+11.
[8]Xu JL,Wang XZ,Liu WT,Wang ZG.Effects of primary key stratum location on height of water flowing fracture zone.Chin J Rock Mech Eng 2009;28(2):380-5.
[9]Xu JL,Zhu WB,Wang XZ.New method to predict the height of fractured waterconducting zone by location of key strata.J Chin Coal Soc 2012;37(5):762-9.
[10]Gao YF,Huang WP,Liu GL,Zhang SF,Zhu QM,Deng ZY.The relationship between permeable fractured zone and rock stratum tensile deformation.JMin Safety Eng 2012;29(3):301-6.
[11]Huang WP,Gao YF,Wang B,Liu JR.Evolution rule and development height of permeable fractured zone under combined-strata structure.J Min Safety Eng2017;34(2):330-5.
[12]Li S,Fan C,Luo M,Yang Z,Lan T,Zhang H.Structure and deformation measurements of shallow overburden during top coal caving longwall mining.Int J Min Sci Technol 2017;27:1081-5.
[13]Majdi A,Hassani FP,Nasiri MY.Prediction of the height of destressed zone above the mined panel roof in longwall coal mining.Int J Coal Geol2012;98:62-72.
[14]Wu Q,Shen JJ,Liu WT,Wang Y.A RBFNN-based method for the prediction of the developed height of a water-conductive fractured zone for fully mechanized mining with sublevel caving.Arab J Geosci 2017;10(7):172.
[15]Fan LM.On coal mining intensity and geo-hazard in Yulin-Shenmu-Fugu mine area.China Coal 2014;40(5):52-5.
[16]Guo WB,Wang YG.The definition of high-intensity mining based on green coal mining and its index system.J Min Safety Eng 2017;34(4):616-23.
[17]Wang JC,Wang ZH.Stability of main roof structure during the first weighting in shallow high-intensity mining face with thin bedrock.J Min Safety Eng2015;32(2):175-82.
[18]Xu NZ,Gao C,Ni XZ,Liu MH.Study on surface cracks law of fully-mechanized top coal caving mining in shallow buried depth and extra thick seam.Coal Sci Technol 2015;43(12):124-8.
[19]Wang X,Meng FB.Statistical analysis of large accidents in China’s coal mines in 2016.Nat Hazards 2018;92(1):311-25.
[20]Lawson HE,Tesarik D,Larson MK,Abraham H.Effects of overburden characteristics on dynamic failure in underground coal mining.Int J Min Sci Technol 2017;27:121-9.
[21]Miao XX,Mao XB,Hu GW,Ma ZG.Research on broken expend and express and press solid characteristics of rocks and coals.J Exp Mech 1997;3:64-70.
[22]Guo GL,Miao XX,Zhang ZN.Research on rupture rock mass deformation characteristics of longwall goals.Sci Technol Eng 2002;5:44-7.
[23]Hu BN,Zhang HX,Shen BH.Guidelines for the retention and coal mining of coal pillars in buildings,water bodies,railways and main wells and alley.Beijing:Coal Industry Press;2017.