薄基岩浅埋煤层长壁保水开采技术适用条件分类研究.pdf

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AdaptableConditionsClassificationof
WaterProtectionMiningTechnologyfor
ShallowCoalSeamwithThinBedrock1

MALi-qiang*ZHANGDong-sheng
SchoolofMineralandSafetyEngineeringSchoolofMineralandSafetyEngineering
ChinaUniversityofMining&TechnologyChinaUniversityofMining&Technology
Xuzhou,Jiangsu,P.R.China221116Xuzhou,Jiangsu,P.R.China221116
[e-mail]

WANGAnZHAOYong-feng
ShendongMiningBranchShendongMiningBranch
ChinaShenhuaEnergyGroupCo.LtdChinaShenhuaEnergyGroupCo.Ltd
Shenmu,Shanxi,P.R.China719315Shenmu,Shanxi,P.R.China719315

Abstract

UsingtheUniversalDistinctElementCode(UDEC)numericalsoftware,theheightof
fracturedzonesforshallowcoalseamwiththinbedrockwerecalculatedandanalyzed,
anditspredictingformulaswasachieved.Theoverlyingwaterbodyofloosen
water-bearingsandforshallowcoalseamwiththinbedrockwasdividedintothree
types,afteranalyzingtheexperiencesofminingunderloosenwater-bearingsandof
domesticcoalmine.Accordingthelithologyanditsweatheringdegreeforshallow
coalseam,theprotectivelayerthicknesswasdeterminedas10m.Basedonthese,the
necessarybedrockthicknessoflongwallcoalfaceforshallowcoalseamwiththin
bedrockcorrespondingdifferentminingheight&wateryieldnatureoftheoverlying
loosenwater-bearingsandwasconfined.Combinedwiththepresentminingstatus,a
setofnewmethodsofadaptableconditionsclassificationofwaterprotectionmining
technologyforshallowcoalseamwiththinbedrockwasputforward.Thephysical
simulationandindustrialtestofwaterprotectionminingof51201coalfacein
Shangwancoalmine,Shendongcoalfieldprovedthattheadaptableconditions
classificationofwaterprotectionminingtechnologyisfeasibleinshallowcoalseams
withthinbedrock.

Keywords:thinbedrock;shallowcoalseam;waterprotectionminingtechnology;
adaptableconditions;fracturedzone;protectivelayer

1Introduction

Atthesametimeofsafeandefficientmining,howtomaximallyprotectthewaterresourceinthe
overlyingloosenwater-bearingsandremainsatypicalproblemintheminingprocessoftheshallow
coalseaminChinaandabroad[1-4].TheShendongco